PLANKTON DIATOM ASSEMBLAGES IN LAKE MICHIGAN E. F. Stoermer J . J . Yang Final Report Federal Water Pollution Control Administration Research Grant 18050DKC Special Report No. 47 Great Lakes Research Division The University of Michigan Ann Arbor, Michigan 1969 TABLE OF CONTENTS INTRODUCTION 1 PREVIOUS INVESTIGATIONS 2 SAMPLING 3 PREPARATION AND ANALYSIS PROCEDURES 4 SYSTEMATIC RESULTS 5 CONCLUSIONS 208 SUMMARY 214 ACKNOWLEDGMENTS 215 LITERATURE CITED. 216 APPENDIX A 221 in INTRODUCTION The flora of the Laurention Great Lakes has lain before the scien- tific public as an unaccepted challenge for nearly 300 years. Until relatively recent times the very size of these bodies of water has dis- couraged their investigation, as the average investigator lacked the necessary physical resources to mount an effective attack upon the pro- blem. As a result, what knowledge we now have at hand has largely been gathered either through short-term studies of the nearshore flora, often conducted by interested amateurs, or as an adjunct to practically oriented research in fisheries and water quality. With the increasingly apparent necessity to deal with the ecology of the lakes if they are to be pre- served in a condition useful to man, this lack of orderly progress, if compared to such thoroughly investigated areas as the terrestrial flora, begins to bear bitter fruit. The dominant organisms in all of the Great Lakes, at least in their pristine condition, are the diatoms. The investigation reported here is an attempt to more fully document the plankton diatom flora of one of the Great Lakes, Lake Michigan. Over the past three years about 1000 collec- tions, both of the modern flora and of preserved collections dating back to about 1880, have been examined. Although the primary emphasis has been the determination of the species present, considerable effort has been devoted to determining the relative abundance of the various elements of the flora, their seasonal cycles, and the history of the changes in the flora during the period of record. Patently none of these objectives will be fulfilled by any single investigation. It is hoped, however, that the results of this research will stimulate others to carry on this general area of research to fruitful conclusions and that the conclusions reached will prove useful to researchers in other ancillary, fields. PREVIOUS INVESTIGATIONS Probably the earliest traceable collections from the Great Lakes area that have been preserved to the present day are those of Ehrenberg (1854-56). The earliest reports dealing with Lake Michigan phytoplank- ton are the lists published by Briggs (1872) and Thomas and Chase (1887). All of these persons were more or less amateur diatomists although they published extensively in the finest tradition of the gentleman amateur scientist of that day. Further records of the Lake Michigan flora are contained in the voluably reported results of the fisheries investigations of Forbes (1882a, 1882b, 1882c, 1883), Ward (1896) and Thompson (1896). In 1904 Chase published a list of Michigan diatoms including many from Lake Michigan. Some records of the flora of the extreme southern end of Lake Michigan are included in the reports of the water quality investigations of Leighton (1907) and Baylis and Gerstein (1929). Al- though containing no records of the algal flora, the report of a similar investigation by Crohurst and Veldee (1927) gives an excellent account of the general conditions in the Chicago area at the time. In 1927 Eddy published his investigations of the plankton of Lake Michigan, and further records are contained in his later general work (1934). Ahlstrom's (1936) report contains the first account of systema- tic collections of the offshore plankton. On the other hand, Skvortzow's (1937) never-completed account of the Lake Michigan diatoms is entirely based on material from the water supply of the city of Chicago. In 1944 Lackey published an account of the phytoplankton of the southern end of Lake Michigan. A number of reports (Daily 1938; Damann 1941; Griffith 1955) have emanated from the botanical laboratories of Northwestern University. The work of Daily and Damann are of particular interest in that their collections are carefully preserved and available for study. Damann later (1945, 1960) published reports based on the plankton collections of the Chicago filtration plant. Although not effectively published, numerous records are available from this installation. Of particular interest to this investigation are the reports of Vaughn (1961, 1962). Records of the Lake Michigan plankton at two locations have been gathered by the National Water Quality Network (1960, 1961, 1962) and are reported in publications by Williams (1962, 1964) and Williams and Scott (1962). Other recent publications include those of Stoermer and Kopczynska (1967), Stoermer (1967, 1968), and Holland (1968, 1969). Patrick and Reimer's treatise on the diatoms of the United States (1966) also contains numerous records from Lake Michigan, although their practice of recording distributions from broad geographic areas makes it difficult to determine the exact distribution of the species in ques- tion. SAMPLING The majority of samples reported in this study were taken by means of a 1/2 meter #20 plankton net. Where water depths permitted, the sampling procedure was a vertical haul from approximately 2 m off the bottom to the surface. In nearshore areas and channels it was necessary to resort to oblique tows. While the limitations of this sampling method are well known and recognized, it is the only method that allows direct compari- son between modern samples with the previously gathered samples available from Lake Michigan. It is perhaps important to emphasize that, even in this limited context, complete uniformity was not achieved. The samples of Thomas and Chase were, in most instances, taken directly from the water supply of the city of Chicago by placing several layers of muslin directly over a water tap and thus straining out sufficient quantities of algae for the preparation of permanent slides. The absolute effici- ency of this sampling method remains unknown and is not amenable to modern, testing. The samples of Daily, Damann and Ford were apparently taken nearshore by means of a horizontal tow of a small diameter, hand cast net. All material examined is listed in appendix "A." The modern collec- tions, presently housed in the author's collection at the Great Lakes Research Division, University of Michigan, consist of a preserved sample of uncleaned material, a sample of cleaned material, and duplicate pre- pared slides. In most instances similar material of the historic collec- tions is available at the Academy of Natural Sciences, Philadelphia. In some cases, particularly with the older samples, only prepared slides exist, the older material having been lost or not preserved by the ori- ginal investigator. PREPARATION AND ANALYSIS PROCEDURES All material gathered in the present investigation was preserved in the field, immediately after collection, in buffered formalin. After being received in the laboratory the samples were split and one sub- sample was set aside, without further treatment as a reference collec- tion. The other subsample was cleaned, by standard methods for diatom taxonomy (Patrick and Reimer 1966). Duplicate prepared slides were made from each cleaned subsample and the remaining material was preserved in ethanol and set aside as a reference collection of cleaned material. The prepared slides are strewn mounts, care being taken that the specimens are evenly distributed and present in appropriate density to facilitate subsequent identification and counting. After preparation, all slides were examined to determine that pro- cessing had been satisfactory and to determine the species present. All entities reported are represented by at least one specimen, marked by a circle engraved on the cover of the appropriate permanent slide, included in the author's concept of the taxon. In order to facilitate systematic treatment, photographic illustrations were made of each entity discovered in the course of the investigation and these illustrations, together with a short description of the taxon and the slide number and location coor- dinates of voucher specimens, are maintained in a permanent file. In all instances optical equipment used for examination of the slides and for taxonomic determinations consisted of a Leitz Ortholux microscope fitted with a full oil immersion system giving a N. A. of at least 1.30. In the case of slides selected for detailed population analysis, counts were made, using the same optical equipment, either of the entire slide, in the case of the offshore samples, or of 1/2 of the slide, in the case of harbor or nearshore samples. The distribution information given in the systematic results are based on these counts, except in the case of entities which did not occur on the slides counted, in which case the number of a slide known to contain the entity in question is given. Computor generated listing of the absolute frequency, the relative frequency and the contribution to diversity of each taxon in the slides counted, which cost considerations prohibit reproducing in this report, are available. The calculated diversity estimates for each assemblage investigated are given in Appendix "A." SYSTEMATIC RESULTS In the following section a tabulation of the entities encountered in the investigation is given. The genera are listed in alphabetical order and the species of each genus are listed in alphabetical order following. Short descriptions are given for the species of the major plankton genera, including the morphological measurements of specimens in populations from Lake Michigan. Similar description of the range of variation of other populations awaits thorough investigation of the ben- thic flora. Because of the time limitations on the completion of this project, it was necessary to proceed with population analyses before reasonably complete systematic treatment of the assemblages could be completed. For this reason a large number of morphologically distinct entities which could not be identified with a recognized taxon were set aside and given a numerical designation. Further research during the course of the investigation has allowed us to determine the relationships of the majority of these, but there remains a significant number which we have not been able to identify. These entities are treated as species ■Incevtae sedis and are listed at the end of each genus. In some in- stances further research will show these entities to belong to recog- nized taxa. Some of them undoubtedly belong to undescribed species. These eventually will be described in the appropriate literature. In many instances determinations await investigation of the benthic flora in order that sufficient specimens be obtained to allow determination of the range of variation of the taxon. Finally a certain number probably are abnormal specimens which can never be satisfactorily determined. Following the systematic information, a list of occurrences of the species in question in the populations counted is given. This informa- tion is presented in the following format: 1) the collection number, 2) the station designation, 3) the date of collection, 4) the proportion of the entity in question in the collection. In cases where a particu- lar entity did not occur in the collections subjected to detailed popu- lation analysis, the number of a voucher slide known to contain the en- tity is given. Genus Aohnanthes Bory Bory, Diet. Class. Hist. Nat., 1:79-80. 1822. The majority of species of the genus Aohnanthes find their primary habitat in periphyton communities. Most of the specimens observed in plank- ton collections from Lake Michigan are probably derived from such communi- ties and their occurrence in the plankton is accidental. Certain species are, however, secondarily planktonic in that they regularly grow attached to some of the larger species of euplanktonic algae. A notable example of this tendency is A, olevei, which is regularly noted in plankton collections. It is probable that many of the smaller members of the genus adopt this habit of growth under certain conditions. Aohnanthes af fin-is Grun. Aohnanthes af finis Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17 (2): 20. 1880. ACAFFIM TOT NO CF STATIONS 101 (6C973 CH 1876 0.02362 ) 46910 CF 0C1945 0.00109 ) 46917 CH 12JA1946 C. 00055 1 (46914 (46916 CH CH 19AP1946 4MY1947 0.00107 I 0.03698 ) 46923 46919 CH CH 22N01946 5JM947 0.00219 ) 15.09082 ) 46909 46907 CH CH MR1947 JL1947 0.00455 ) C. 00049 ) (46913 (46770 CH EV 6AU1947 9J11937 0.07321 ) 0.OC596 ) 46922 46764 CH EV 21AU1947 17JC1937 0.01842 ) 0.00806 1 46758 46757 EV EV 5JN1937 25JL1937 0.01070 ) 0.01444 ) (46747 (46750 EV EV 1AU1937 24SE1937 0.0C990 ) 0.0C943 ) 46763 46748 EV EV 23AU1937 130C1937 0.04058 ) 0. 08540 ) 46760 46767 EV EV 22SE1937 270C1937 C.0C492 ) C.C5416 ) (46749 (46766 EV EV 12MR1938 14CE1938 0.01214 1 0.01584 ) 46768 1226 EV C 7 16MR1938 16MY1964 0.05880 ) 0.01522 ) 46762 1240 EV 0 6 18MR1938 10JN1964 0.08822 ) C.C0153 ) ( 1243 ( 1255 E 6 D 5 13JN1964 15JL1964 0.00209 I 0.00257 ) 1244 1258 F F 1 1 11JN1964 6JL1964 0.00219 ) 0.16518 1 1245 1259 F F 2 2 11JN1964 6JL1964 C. 00692 ) C.C1859 ) ( 1260 ( 1268 F 3 E 2 6JL1964 15AU1964 0.0C764 ) 0.04103 ) 1443 127C 8 F 6 1 16AU1964 10AU1964 0.00198 ) 0.63717 ) 1267 1272 0 c 6 1 18AU1964 10SE1964 0. 00216 ) C.CC410 ) ( 1279 ( 1286 E 1 F 2 16SE1964 15SE1964 0.03534 ) 0.01095 ) 1280 1287 E F 2 3 16SE1964 15SE1964 0.00681 ) 0.01001 ) 1285 1302 F E 1 5 15SE1964 130C1964 1.22299 ) C.CC405 ) ( 1303 ( 1306 E 6 F 3 130C1964 11GC1964 0.00560 ) C.C1940 ) 1304 1308 F C 1 7 110C1964 6N01964 0.01729 ) C.C0608 ) 1305 1322 f E 2 6 110C1964 7N01964 0.02933 I C.CC333 ) { 1344 ( 1512 C 3 E 3 E 3 E 2 25AP1967 1SE1967 24SE1967 110C1967 0.0C165 ) 0.0C393 ) 1452 1535 E C 2 7 14JL1967 20SE1967 0.03619 ) 0.00322 1 1505 1536 A £ 4 2 28AU1967 24SE1967 0.00515 ) C. 01091 I ( 1537 1 1541 0.00431 1 0. 00532 ) 1538 1542 E E 5 3 23SE1967 110C1967 0.01657 ) C. 00509 ) 1540 1543 C E 5 5 40C1967 10OC1967 0. 00496 ) C. 02155 ) ( 1381 ( 1389 GS 5 GS13 10MY1967 12MY1967 0.00239 ) C. 01031 ) 1384 1390 GS 8 GS14 10MY1967 12MY1967 0.00370 ) 0.00587 ) 1387 1391 GS11 GS15 12MY1967 12MY1967 0.03169 ) C.0C479 ) ( 1392 { 1555 GS16 GS 2 12MY1967 30C1967 0.00616 ) 0.01766 ) 1394 1557 GS18 GS 4 13MY1967 30C1967 0.00344 I 0.02616 ) 1554 1559 GS GS 1 7 30C1967 40C1967 C. 01067 ) 0.00350 ) ( 1560 { 1567 GS 8 GS15 40C1S6 7 50C1967 , 0.00945 ) C.0C318 ) 1562 1569 GS10 GS17 50C1967 5CC1967 0.00247 ) 0.00297 ) 1565 1571 GS13 GS19 50C1967 60C1967 C. 01521 I 0.0C234 ) ( 1573 ( 152 4 GS21 MI 1 60C1567 20SE1967 0.00560 ) 0.02189 ) 15 74 1546 G522 LU 1 60C1967 2CC1967 C. 14094 ) 0.08003 ) 1575 1521 GS28 SH 1 60CIS67 18SE1967 C. 00516 ) C.0C577 ) ( 1523 ( 1545 BA 1 WL 1 19SE1967 2CC1967 0.01845 ) 0.0C676 I 1526 1549 MC MQ 1 1 20SE1967 4CC1967 C. 01707 1 0.02741 ) 1530 1552 FR SM 1 1 24SE1967 60C196 7 C. 03000 ) C.C0660 ) ( 1550 ( 1402 MR I TR 2 50C1967 6MY1967 0.02478 ) C. 01083 ) 1426 1352 MS KW 2 2 29MY1S67 21AP1967 0.05249 ) 0.00859 ) 1350 1403 8H CA 2 2 19AP1967 10MY1967 C. 00220 ) 1.42540 ) ( 1404 M0 2 10MY1967 0.02541 ) 1405 ES 2 12MY1967 0.01290 ) Aohnanthes biasolettiana (Klltz.) Grun. Synedra biasolettiana Kutzing, Bacill., p. Aohnanthes biasolettiana (Kiitz.) Grunow in: Vet.-Akad. Handl., Ny Foljd, 17 (2): 22. 63, pi. 3, fig. 22. 1844. Cleve and Grunow, K. Svenska 1880. 2 ACBIASOL TCT NO OF STATIONS 8 (46743 EV GS13 20JM937 12MY1967 0.00428 ) 0.00258 ) (46762 ( 1565 EV GS13 18MR1938 50C1967 0.04411 ) C. 04056 ) ( 1285 ( 1574 F 1 GS22 15SE1964 60C1967 C. 01165 ) C.0C863 ) ( 1405 ES 2 12MY1967 0.01290 ) ( 1407 SM 2 14MY1967 0.00597 ) ( Aohnanthes oaloav Cleve Aohnanthes oaloav Cleve, Acta Fauna Fl. Fennica, 8(2) :51, pi. 3, fig. 8. 1891. 3 ACCALCAR IOT NO OF STATIONS ( 1560 -L..155fl_ GS 8 40C1967 50C1967 C.0C472 ) 0.01239 ) Aohnanthes clevei Grun. Aohnanthes olevei Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17 (2): 21. 1880. This species is quite common in plankton collections from Lake Michigan. As previously noted, it is often observed growing attached to some of the larger euplanktonic algae. 4 AC.tlFUFII TPT Hf rF STATlflNS 1 3540 CH UMY1879 0.00466 I 46770 EV 9JL1937 0.00596 1 46750 EV 24SE1937 C.CC471 ) (46762 ( 1268 EV E 2 18MR1938 15AU1964 0.02206 ) 0.00274 ) 1240 127C D 6 F 1 10JN1964 10AU1964 0.00153 ) 0.00272 ) 1258 1279 F 1 E 1 6JL1964 16SE1964 C.CC236 ) C.CC393 1 ( 1285 ( 1316 F I D 6 15SE1964 9N01964 0.04659 ) 0.00378 ) 1300 1320 E 3 E 4 130C1964 7N01964 0.00358 ) 0.00207 ) 1306 1323 f 3 F 1 HOC 19 64 6N01964 C. 00277 ) 0.CC139 ) ( 1340 ( 1435 C 7 C 7 28MR1967 13JN1967 0.00145 1 0.00316 ) 1343 1512 A 6 E 3 19AP1967 1SE1967 0.00069 ) C. 00393 ) 1346 1536 C 7 E 2 21AP1967 24SE1967 C.0C134 ) C. 00273 ) ( 1542 JLL222 . E 3 GS16 11CC1967 12MY1967 0.00509 ) 0.00308 1 isea 1394 GS12 GS18 12MY1967 13MY1967 0.00603 ) 0.00172 1 1389 1395 GS13 GS19 12MY1967 13MY1967 C.0C258 ) C. 00117 ) ( 1554 ( 1565 GS 1 GS13 30C1967 50C1967 0. 00712 ) 0.06592 ) 1555 1566 GS 2 GSM 30C1967 5GC1967 0.00353 ) 0. 00183 ) 1557 1567 GS 4 GS15 30C1967 50C1967 C.C1495 ) C.0C953 I ( 1569 ( 1573 GS17 GS21 5DC1967 60C1967 0.00149 ) 0.00224 > 1571 1574 GS19 GS22 60C1967 6CC1967 C. 00059 ) 0.05753 ) 1572 1575 C-S20 GS28 60C1967 60C1967 C.CC090 ) C.0C129 ) ( 1544 ( 1527 MU 1 TR 1 20C1967 2CSE1967 0.00238 ) 0.11321 ) 1546 1528 LU 1 SB 1 20C1967 20SE1967 C.05002 ) 0.02888 ) 1526 1529 CO 1 KW 1 20SE1967 20SE1967 C. 01138 ) C. 08394 ) ( 1530 ( 1551 FR 1 ES 1 24SE1967 50C1967 0.07001 ) 0.02396 ) 1545 1550 ML 1 MR 1 20C1967 50C1967 0.04730 ) 1.58592 ) 1548 1553 CA 1 SG 1 30C1967 60C1967 C.C1272 » C. 02203 ) ( 1426 ( 1399 MS 2 PW 2 29MY1967 5MY1967 0.16798 ) 0.C068C ) 1417 1354 HO 2 GH 2 22MY1967 25AP1967 0.00748 ) 0.00173 ) 1350 14C4 BH 2 MC 2 19AP1967 10MY1967 0.07929 ) C.C5081 ) ( 1407 SM 2 14MY1967 0.0C597 ) Aohnanthes olevei var. vostrata Hust. Aohnanthes olevei var. vostvata Hustedt in: europas, Heft 10, Aufl. 2, p. 204, fig. 295. 1930. Pascher, Sussw.-Fl. Mittel- This entity has the same growth habit as the nominate variety. Speci- mens from Lake Michigan are usually in the upper size range according to descriptions given by most authors (see Patrick and Reimer 1966). ACCLEVVR ICT NC CF S7ATICNS (6C973 (46921 CH CH 1876 23N01945 0.04724 ) 0.00065 ) 354C 46917 CH CH 11MY1879 12JA1946 0.00466 ) 0.00083 ) ( 3541 (46915 CH CH 1FE1S81 20FE1946 C.CC978 ) 0.01138 ) (46914 (46920 CH CH 19AP1946 20DE1946 0.0C1O7 ) 0.00062 ) 46924 46905 CH CH 10MY1946 JA1947 0.C0071 I 0.00245 ) (46923 (46909 CH CH 22NC1946 MR1947 C.CC437 ) 0.02732 ) (46906 (46922 CH CH MY1947 21AU1947 0.00398 1 C. 00097 ) 46919 46758 CH EV 5JN1947 5JN1937 C. 00303 1 0.00713 ) (46907 (46757 Ch EV JL1947 25JL1937 C.0C099 1 C.0C481 ) (46747 „_1A616!3 „ EV FV 1AU1937 72SF1937 0.00248 ) 0.00492 ) 46763 46744 EV EV 23AU1937 60C1937 C. 02029 1 0.00975 1 (46752 (46748 EV EV 15SE1937 130C1937 0.C6530 ) C. 06405 ) (46767 (4676? EV FV 270C1937 18MR1938 0.0C387 I 0.08822 > 46749 1244 EV F 1 12MR1938 11JN1964 0.01214 ) 0.00219 ) (46768 ( 1245 EV F 2 16MR1938 11JN1964 0.02940 ) 0.0C346 I ( 1246 ( 1770 F F 3 1 11JN1964 1CAU1964 0.0C598 ) 0.0C272 1 1258 L1285 F F 1 1 6JL1964 15SE1964 0.00708 ) 0. 01165 ) ( 1268 ( 1303 E E 2 6 15AU1964 130C1964 C. 00547 I C.OC560 ) ( 1305 ( 1536 F E 2 2 110C1964 24SE1967 0.00173 1 0.00273 ) 1511 1541 E E 2 2 1SE1967 110C1967 0.00307 ) 0.00532 1 ( 1512 ( 1542 E E 3 3 1SE1967 110C1967 C. 00785 ) C. 01526 ) ( 1385 1 13H9 GS 9 GSM 10MY1967 12MY1967 0.0C235 ) 0.00516 ) 1387 1390 GS11 GS14 12MY1967 12MY1967 0.00792 ) 0.01174 ) ( 1388 « 1392 GS12 GS16 12MY196 7 12MY1967 0.01810 ) 0.00308 ) ( 1393 I 1554 GS17 KS 1 13MY1967 30C1967 0.O0548 ) 0.00356 ) 1394 1557 GS18 GS 4 13MY1967 30C1967 0.00516 1 0.00374 ) ( 1396 ( 1565 GS20 GS13 13MY1967 50C1967 C. 00074 ) C. 20789 ) ( 1567 1 1570 GS15 GS.18 GS22 TR 1 50C1967 5QC1967 60C1967 P0SF1967 0.01270 1 ,„q,0C992__L 0.05753 ) 0.03774 ) 1568 1571 1544 1529 GS16 GS19 50C1967 60C1967 0.00144 ) 0.00176 1 ( 1569 ( 1572 C-S17 GS20 50C1967 60C1967 C. 00297 ) C.CCC90 ) ( 1574 1 1 5P7 MU KU 1 1 2CC1967 20SE1967 0.00238 ) 0.01199 ) ( 1546 1 1530 LU FR 1 1 20C1967 24SE1967 C. 06502 1 C.C3000 ) ( 1545 I 1476 WL MS 1 2_ 20C1967 29MY1967 0.05406 ) 0.01050 ) 1550 14C2 MR TR 1 2 50C1967 6MY1967 0.04956 I 0.00541 1 ( 1553 ( 1354 SG GH 1 2 60C1967 25AP1967 C. 02938 ) C.0C345 ) ( 1404 M0 2 10MY1967 0.01270 ) 1405 ES 2 12MY1967 0.00645 1 ( Aohnanthes oonspioua A. Mayer Aohnanthes oonspioua A. Mayer, Bayrisch Kryptog. Forsch., 1:198, pi. 6, fig. 9, 10. 1919. 6 ACCONSPI TOT NO OF STATIONS 14 (46921 ( 1511 CH E 2 23N01545 1SE1967 0.00065 ) 0.00307 I (46768 ( 1565 EV GS13 16MR1938 50C1967 0.01470 ) 0.00507 ) I 1279 ( 1569 E 1 GS17 16SE1964 50C1967 C. 00393 ) 0.00149 ) ( 1574 ( 1527 GS22 TR 1 6CC1967 20SE1967 o.nflPflfl 1 0.00629 ) 1 1547 ( 1530 MS 1 FR 1 2DC1967 24SE1967 0.00798 1 0.01000 ) • 1526 ( 1550 MO 1 MR 1 20SE1967 50C1967 C.0C569 ) C. 23541 ) ( 1426 MS 2 29MV1967 0.01050 ) ( 1350 BH 2 19AP1967 0.02863 ) ( Aohnanthes oonspioua var. bvevistviata Hust. Aohnanthes oonspioua var. bvevistviata Hustedtin Mitteleuropas, Heft 10, Aufl. 10, p. Coll: 983 202, fig. Pascher, Sussw.-Fl. 292. 1930. Aohnanthes deflexa Reim. Aohnanthes deflexa Reimer in: Patrick and Reimer, Acad. Nat. Sci. Phila- delphia Monogr. , 13:256, pi. 16, figs. 16-20. 1966. 7 ACCEFLEX TOT NO OF STATIONS 29 (46758 EV 5JN1937 0.04993 ) 0.02407 ) 46743 46763 EV EV 20JN1937 23AU1937 0.00428 ) 0.08117 1 (46764 (46767 EV EV 17JL1937 270C1937 C.CC806 ) 0.0C774 ) (46768 EV 16MR1S38 11JN1964 0.0147C ) 0.00346 ) 46762 1258 EV F 1 18MR1938 6JL1964 0.02206 1 0.00472 ) ( 1244 ( 1260 F 1 F 3 11JN1S64 6J11964 C.CC110 ) 0.CC191 ) < 1285 F 1 15SE1964 0.00582 ) 0.00247 I 1387 1527 GS11 TR 1 12MY1967 20SE1967 0.01188 I 0.01887 1 ( 1398 ( 1530 GS22 FR 1 24SE1967 C. 01000 ) ( 1545 « 1428 ( 140 1 ( 1405 ML 1 MU 2 MO 2 ES 2 20C1S67 0.01351 1 0.00301 ) 1550 1426 MR 1 MS 2 50C1967 29MY1967 0.14868 ) 0.04199 1 ( 1553 ( 1350 SG 1 BH 2 6CC1567 19AP1967 0.C0881 ) 6MY1967 12MY1567 0.00588 ) C.C1935 ) 1403 1407 CA 2 SM 2 10MY1967 14MY1967 0.02615 I 0.00597 1 ( 1404 ( MO 2 10MY1967 C.C3811 ) Aohnanthes detioatula (Kutz.) Grun. Aohnanthidium delicatulum Kutzing, Bacill., p. 75, pi. 3, fig. 21. 1844. Aohnanthes delioatula Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny FBljd, 17 (2): 22. 1880. 8 ACJ1E_LICC_ILI_N0_0F_S, TATJ0NS_ 1 { 1550 MR J 50 £1967 0.03717 1 Aohnanthes detha Hohn and Hellerm. Aohnanthes detha Hohn and Hellerman, Trans. Amer. Micr. Soc, 82(3):274, pi. 2, figs. 7-8. 1963. 9 ACDELtAa-LCXALEF^STATICN^ 2 ( .155.0 ..._MR_1 50C1967 0_ j02Jl.?A ._!_ 1CMY1967 0.01270 ) ( Aohnanthes dispar Cleve Aohnanthes dispar Cleve, Acta Soc. figs. 2-3. 1891. Fauna Fl. Fennica, 8 (2): 52, pi. 3, —1-0 ACDISPAR TOT NO DF STATIONS I . (-13.88 GS_L2__ 12HY1967 0,_0C6C3_i < Aohnanthes exigua Grun. Achnanthes exigua Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17 (2): 21. 1880. Ji..„_M:_EXJ^UA_JrjlT_JSC_EJL„SXAJLI_ONS 23_ 767 EA ?_7.nr.1S37 0.OC387 ) 1268 E 2 JL332 CS16 1565 157_5_ 1551 13ii_ GS13 GS78 ES 1 Jtl_2_ 15AU1964 17HY1<=67 0.0027'i ) 0.00308 ) 50C1967 6QC126JL 0.01521 ) 0.0C129 ) 50C1967 _2J.J6£1567__ 0.02396 I 0.00310 ) 1341 1397 A 3 GS21 1571 _L5_4S_ 1550 _1_41I_ GS19 LU 1 19AP1967 13HY1967 C. 00108 ) C. 00065 1 MR 1 _HQ_2_ 6GC1967 2GC1967 C. 00059 ) C. 00500 ) 50C1967 22MY1967 C. 07434 I 0.00374 ) 1541 1555 E 2 GS 2 HOC 196 7 30C1967 C.CC236 ) 0.01064 ) C.0C353 ) 1573 GS21 60C1967 C. 00112 ) 1529 KM 1 20SE1967 C. 03598 >_ 1553 SG 1 60C1967 C.02203 ) 1350 BH 2 19AP1967 C.0C441 ) Achnanthes exigua var. heterovalva Krasske Aohnanthes exigua var. heterovalva Krasske, Bot. Arch., 3(4):193, figs. 9a-b. 1923. 12 ACEXIGV.H TOT NO OF STATIONS 6 T7544 SlT7 20C1967 " 0.00238 ) ( 1522 BH 1 18SE1967 C. 00365 > ( 1545 hL 1 20C1967 C.0C676 ) , i^q up i 4nr.l967 0.01370 ) I 1550 HR 1 50C1967 1.35051 I 1 1350 8H 2 19AP1967 0.02863 ) Aohnanthes exigua var. heterovalva fo. semiaperta Guer. Aohnanthes exigua var. heterovalva fo. semiaperta Guermeur, Cat. Inst. Francais d'Afrlque Noire, 12:32, pi. 2, figs. 3c, 3i, 3 j . 1954. - 13 Af.FXVHFS TOT NC OF STATIONS 14690* r.H MY1947 0.00066 ) I 1571 GSJ9 6nr.1967 0.00117 I ( 1575 GS2« 6QC1967 C.0C129 ) Aohnanthes hauokiana Grun. Aohnanthes hauokiana Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17 (2): 21. 1880. 14 ACHAUCK1 TOT NO OF STATIONS I 1376 E 5 6MY1967 0.00281 ) < 1544 MU 1 20C1967 0.00477 ) ( 1417 HO 2 22MY1967 C.0C374 ) t 1350 BH 2 19AP1967 0.01101 ) < 1354 GH 2 25AP1967 0.00345 ) ( 15 ACHAUCKQ TOT NO OF STATIONS 1 ( 1305 F 2 110C1964 0.00173 ) ( Aohnanthes hauokiana var. rostrata Schulz Aohnanthes hauokiana var. rostrata Schulz, Bot. Arch., 13:191, fig. 40. 1926., 16 ACHAUCVR TOT NC OF STATIONS ( 1377 GS 1 __L_J,5_20_ HtJ_l_ 9CY1967 0.0C3S6 ) < 1544 MU 1 18SEI967 0.00471 ) I 1545 ML 1 2CC1967 0.00238 ) ( 1547 *S 1 _20C 1967 0.00676 1 ( 1426 *S 2 20C1967 C.CC798 ) 2SMY1S6 7 C.C2100 > 19AP1967 0.C22C3 ) I Aohnanthes hungavioa (Grun.) Grun. Aohnanthidivm hungavioum Grunow, Verh. Zool.-Bot. Ges. Wien, 13:146, pi. 4, figs. 8a-c. 1863. Aohnanthes hungavioa (Grun.) Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17 (2): 20. 1880. 18 ACHUNGAR TOT NO CF STATIONS I 1342 _f_~l.40.4_.. A 4 r,R 2 19AP1967 13MY1 .67 0.00180 ) __Q._0_02_7_______L- ( 1417 _.l 22MY1967 0.00374 I Aohnanthes laneeolata (Breb.) Grun. Aohnanthidium lanoeolatum de Br£bisson ex Kutzing, Sp. Alg. p. 54. 1849. Aohnanthes lanoeolata (Br_.b. ex Kutz.) Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Fo"ljd, 17 (2): 23. 1880. _CF. SJA11CNS_ < 1317 < 1416 I 1544 l 1529 ( 1549 ( 1426 JL.__._1__ 1 1400 1 14_i__ E 1 F - I 1555 GS 2 ( 1572 !___!_ ______ KW 1 -CO 1 MS 2 ■SH 2 SB 2 _CA__2_ 6N01S64 0.0C191 I ( 14C8 28HY1967 0.CC219 I ( 1452 ( 1559 ( 1574 30C1967 60C1967 0.00353 1 0.CCO90 ) 20C1967 0.O0238 I ( 1546 _i83_.l____7____ 1 1574 ( 1547 GS22 MS 1 6CC1967 20C1967 0.0C575 ) 0.01597 ) 1575 1524 GS28 Ml 1 60C1967 20SE1967 0.00129 ) 0.02189 ) 1 1544 t 1521 MU 1 SH 1 20C1967 18SE1967 C.C0238 ) C. 00577 ) 1 1550 1 1427 MR 1 til 2 50C1967 ?9MY19A7 0.79296 ) 0.01211 ) 1553 1350 SG 1 BH 2 60C1967 19AP1967 0.00734 ) 0.01762 ) ( 1428 1 1402 MU 2 TR 2 29MY1967 6MY1967 0.00301 ) C.0C541 ) 10MY1967 0.02541 Aohnanthes lanoeolata var. robusta Hust. Aohnanthes lanoeolata var. robusta Hustedt, Arch. Hydrobiol., Suppl. 15:202, pi. 13, figs. 47-49. 1938. 20 ACLANCVB TOT NO OF STATIONS 50C1967 C. 30975 ) ( 1426 29KY1967 0.03150 1 Aohnanthes lanoeolatoides Sov. Aohnanthes lanoeolatoides Sovereign, Trans. American Micr. Soc, 77(2): 115, pi. 2, figs. 18, 19. 1958. -2A ACIANTOC TOT NO OF STATIONS ' ' 5f,7 RSI 5 50C1967 0.0C159 ) Aohnanthes latevostvata Hust. Aohnanthes laterostrata Hustedt in: Raberihorst, Kryptog.-Fl. Deutschland, 7(2)3:392, fig. 840. 1933. -ZS Af.l ATFRtl ICT NC OF STATIONS 1 -S522- 6CC1967 0.0C575 I ( Aohnanthes laueribuvgiana Hust. Aohnanthes laueribuvgiana Hustedt, Abh. Naturw. Ver. Bremen, 33(3) :451, figs. 1-6. 1944. 79 ACLAUENB TCT NO OF STATIONS J 1268 E_2_ t 1572 GS20 ' 15A6 LU 1 0.00274 I 60C196 7 20C1967 0.00090 I C. 00500 ) ( 1574 < 1527 CS22 TR 1 60C1967 20SE1967 0.00288 I 0.00629 ) ( 1544 _L_1530__ MU 1 FR1 20C1967 24SE1967 _C. 00267 )_ C.00238 ) _0._C1000 J 11 Aohnanthes lernmermanni Hust. Acknanthes lernmermanni Hustedt in: Rabenhorst, Kryptog.-Fl. Deutschland, 7(2)3:390, fig. 837. 1933. ( 1350. . Bh 2 19AP1967 B_J____ 20_L (_ 30 ACLtHCER._LCJ_NC... CF STATIONS 2 ._ ( 1426 _ MS 2 2.9CY1967 0.07349 31 ACLEf^EC ICT NC OF STATIONS. . 1 I 1.547 .......S.J . ._200 1.967 0j.Cl.798 I. (...__ Aohnanthes linearis (Wm. Smith) Grun. Aohnanthidium lineare Wm. Smith, Ann. Mag. Nat. Hist., Ser. 2, 15:8, pi. 1, fig. 9. 1855. Aohnanthes linearis (Wm. Smith) Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17(2): 23. 1880. 32 ACU.NEAR_T.CT NC 0_F_SJ__J_I_Q__S_. J46909 CH CH FV fRL94.7 J L 19 4 7 9JL1937 .0.00455..). 0.00C49 ) C.0C596 ) (A6 -C6 . . (46922 (46764 CH CH EV MY1947 21AU1947 17JL1937 0.00199 ) 46919 Ch 5JN1947 C.C2428 ) (46907 (46770 0.00194 ) 0.02417 ) 46743 46757 EV EV 20JN1937 25JL1937 0.0C428 ) C. 01444 ) (46747 146752 (46762 ( 1258 EV EV EV F F F 1 1 ? 1AU1937 . 15SE19.il 18KR1938 6JL 1.964 110C1964 74SE1967 0.0C248 ) . 0.26121 1 C.C8822 ) 0.00236 ) C.0C494 I O.CC273 1 (46763 (46767 (46751 ( 1260 ( 1343 ( 1392 EV ___EY. _ EV F 3 23AU1937 27001937 30MR1938 6JL1964 0.14205 ) C. 01934 ) 0.02233 ) C. 00191 ) 46765 46768 1243 1285 EV EV E F E OS 6 1 3 1 30AU1937 16HR1938 13JN1964 15SE1964 1SE1967 30C 196 7 C. 00558 ) 0.10290 ) C.0C626 ) 0.C2912 ) ( 1304 ( 1536 A 6 GS16 19AP1967 12HY1967 C.00C69 ) 0.00308 ) 1512 1554 0.0C393 ) C.CC356 ) ( 1555 ( 1565- GS 2 _ .CLS.L3. GS19 GS28 SH 1 SR 1 3CC1967 5GC19.67_ 60C1967 60019.67 18SE1967 2CSE1967 0.00353 ! C. 01014 ) C.OC059 ) 0.00129 ) 0.00577 ) 0.01444 ) ( 1558 ( 1569 ( 15 73 ( 1544 [ 1523 ( 1529 GS 5 GS17 GS21 MU 1 RA 1 KW 1 40C1967 5CC1967 0.00396 ) 0.00149 ) 1561 1570 GS 9 C-S18 40C1967 50C1967 C.C0587 ) 0.C3967 ) ( 1571 ( 1575 60C1967 20C1967 0.00112 ) 0.00238 ) 1574 1546 0S22 LU 1 60C1967 20C1967 C.CC288 ) C. 01000 ) ( 1521 1 1 .?fl 19SE1967 20SE1967 C.C0923 ) C. 02398 1 1527 1548 TR CA 1 1 2CSE1967 30C196 7 C.C3774 ) C.C1272 ) ( 1551 ( 1553 ES SG KM ...CI.- 1 l..__ 2 ? 50C1967 6CC1967 21AP1967 19AP1967 0.04793 I 0.0C734 ) 0.CC859 ) 0.00359 I ( 1552 ( 1426 SH 1 MS 2 60C1967 29PY1967 0.01981 ) 0.01050 ) 1550 1350 PR BH 1 2 50C1967 19AP1967 C. 49560 ) C. 17621 ) ( 1352 ( 1349 ( 1404 ( MC 2 10MY1967 0.03811 ) 1405 ES 2 12MY1967 C.0C645 ) Aohnanthes linearis fo. ourta H. L. Smith Aohnanthes linearis fo. ourta H. L. Smith in: Boyer, Diat. Philadelphia, p. 59, figs. 16-17. 1916. 33 ACLIIvEFC TC..T_.N.Q._0F_STATJ.0NS _3_. (46919 _ CH . 5jl_U94 7 0.0C3O3 5JN1937 0.01426 ) 1 13C5 U0C1964 C. 00518 ) Aohnanthes marginulata Grun. Aohnanthes marginulata Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17 (2): 21. 1880. 34 AC.ARGIN TCT NO CF STATIONS 2 ( 1565 GS13 5CC 1967. 0.01014 1 (_.1553 SG_1._ 60C1967 C. 01469 I (. Aohnanthes miorooeiphala (Kiitz.) Grun. Aohnanthidium miorooe-phalum Kutzing, Bacill., p. 75, pi. 3, figs. 13, 19. 1844. Aohnanthes microoephala (Kiitz.) Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17.(2): 22. 1880. 33. _ACMl£fiCe.JULLJS.C_cr__ST_*_T._CNS 2 < 1244 F 1 11JN1964 0.0C658 ) ( 14C3 CA 2 50 ACSPECCL TOT KC OF STATIONS 7 10C Y 1967 0.34000 1 ( ( 1258 F 1 JL 130-4 F 1 ( 1381 GS 5 6JL1964 0.C33C4 ) ( 1260 F 3 11001964 0.00494 ) 1 13C5 F 2 I0MY1967 0.0C477 ) ( 6JL1964 0.00382 ) ( 1270 F 1 110C1964 C. 00173 ) ( 1306 F 3 10A01964 0.03812 ) 110C1964 C. 00277 ) 12 Achnanthes minutissima Kutz. Aahnanthes minutissima Kiitzing, Linnaea, 8:578, pi, 16, fig. 54. 1833. 36 ACM INUTI TOT NO OF STAT JONS (_46924 CH 1CKY1946 0.00141 146923 (46916 CH CH 22ND1946 4MY1947 0.00219 ) 46920 46919 CH CH 200E1946 5JN1947 0.00154 ) .46909 CH MR1947 0.00455 ) 0.00034 1 1.47949 ) 146913 CH 6AU1947 0.C3138 (46758 EV 5JM937 0.14264 1 46770 EV 9JL1937 C.C8946 ) (46764 EV 17JL1937 0.82192 1 (46757 EV 25JU937 0.22146 ) 46747 EV 1AU1937 C.C2228 ) . 146763 __.e_.__ 23AU1937 2.27273 (46752 EV 15SE1937 0.26121 1 46760 EV 22SE1937 C.C1477 ) 146748 EV 130C1937 0.04270 146767 EV 270C1937 C.0C774 ) 46749 EV 12NR1938 C. 02427 ) 1 46766 _ EV 16NR1938 _._.0.C73_5C 0.0 3169 (46762 ( 1244 EV F 1 18CR1938 11JN1964 0.17644 1 46756 EV E 2 27AP1938 14JL1964 C.CC168 ) (46766 14CE1938 C. 00219 ) 1256 C.C0183 ) ( 1258 F 1 6JL1964 0.00708 ( 1262 8 3 17AU1964 C. 00210 ) 1322 E 6 7N01964 C.C0333 ) ( 1323 F 1 6N01S64 C.CC279 ( 1341 A 3 19AP1967 C. 00108 ) 1554 GS 1 30C1967 C.CC712 ) ( 1555 GS 2 3CC1967 0.00353 ( 157C GS18 50C1967 0.01983 ) 1574 GS22 60C1967 C.CC575 ) { 1575 GS28 60 CI 96 7 0.00125 ( 1546 LU 1 20X1967 0.09503 1 1523 RA 1 19SE196 . C.CC923 ) . 1__L52 5 EM.-J SB 1 ___2CSE_196 7 2CSE1967 0.01393 0.0 2888 1 1526 ( 1529 MQ_1_ Kh 1 20SE1967 20SE1967 0.00569 ) C. 57561 ) 1527 TR 1 20SE1967 24SE196 7 C.C5031 ) ( 1528 15 30 FR 1 C.2CC02 ) ( 1545 Wl 1 ?f_Cl 967 0.05406 ( 1549 HC 1 40C1967 0.12334 1 1551 ES 1 50C1S67 C.C1598 ) 1 1552 SM 1. 6CC1967 O.OC660 ( 155C MR 1 5CC1967 1.09032 1 1553 SG 1 60C1967 C.C2203 ) ( .1426 _ MS_._2 KW 2 29HY1967 21AP1967 _0,_0__.2_49.._ 0.01718 ) ( 1427 ( 1354 LU 2 GH 2 29MY1967 25AP1967 0.01211 ) 1350 BH 2 19AP1967 0.11674 ) I 1352 0.00345 1 14C3 CA 2 10MY1967 C.CS154 1 (.1404 _ _c 2. 1QCY1967 0.02541 ( 14C5 ES 2 12MY1967 0.00646 1 1407 $f 2 14MY1967 0.00597 ) ( 14C6 GB 2 13CY1967 C.0027C ( 1423 WA 2 25. Y1967 0.00428 ) Achnanthes minutissima var. cvyptocephala Grun. Achnanthes minutissima var. cvyptocephala G.runow in: Van Heurck, Syn. Diat. Belgique, pi. 27, figs. 41-44. 1880. 37 ACMINLVC (CT NO OF STATIONS 13 EV E 3 1 1260 .F. 3, 5JN1937 0.0C357 ) 6JL1964 0.00191 1 (46757 ( 1542 25JL1937 110C1967 0.00963 ) C. 01017 ) (46763 ( 1387 EV GS11 23AU1937 0.02029 ) ( 1389 GS13 [___15_S9 . 0 1 12MY1967 0.0C258 ) 40C1967 0.02741 1 1CKY1967 C. 03811 ) ( 1394 ( 1551 ( GS18 ES 1 13CY1967 5CC1967 0.00172 ) 0.C1598 1 ( 1568 1 1403 GS16 CA 2 50C1967 10MY1967 C.CC144 ) ( 1404 HO 2 Achnanthes nollii Bock Achnanthes nollii Bock, Nachr. Naturw. Mus. Aschaffenburg, 38:54, pi. 2 figs. 1-2; pi. 5, figs. 7-9. 1953. ' 38 ACNCLLII TCT NC OF STATIONS ( 1549 CO 1 ( 1403_ _£S____ 4CC1967 0.01370 ) ( 14C3 " CA 2 __12___Y1967 0.0C645 1 (_ 10KY1967 C.C3923H mM~ fo 2 10MYfs6_ 0~_oT27b~ 47 ACSPECCI TCT NC CF STATIONS 3 1 1258 F l 6JL1964 C.CC23IR 1 50C1967 0.02478 ) ( 1404 MO 2 1CMY1967 0.01270~) T 13 Aohnanthes peragalli var. fossilis Temp, and Perag. Aohnanthes peragalli var. fossilis Tempere and Peragallo, Diat. Monde Entier, 2nd. ed., p. 113. 1909. Coll: 982. Achnanthes pinnata Hust. Aohnanthes pinnata Hustedt in\ Hedin, Southern Tibet, vol. 6, pt. 3, p. 123, pi. 9, figs. 15-18. 1922. 41 ACPINNAT 107 NO OF STATIONS 7 146752 EV 15SE1937 0.02177 ) ( 1439 B 6 5JN1964 C.C0200 ) < 1279 E 1 16SE1964 C. 00393 ) I 1785 F 1 15SEI964 0.CC582 ) ( 1533 A 4 19SE1967 0.00464 I 1 1550 HR 1 50C1967 C. 01239 ) ( 1350 BH 2 19AP1967 0.CC220 ) ( Aohnanthes ploenensis Hust. Aohnanthes ploenensis Hustedt in\ Pascher, Sussw.-Fl. Mitteleuropas Heft 10, Aufl. 2, p. 199, fig. 280. 1930. 42 ACPICNEC TCT NC CF STATIONS 1 ( 1550 NP. 1 5CC1967 0. 16107 ) T Aohnanthes sublaevis Hust. Aohnanthes sublaevis Hustedt, Bot. Archiv. 38:180, figs. 15-16. 1937. 49 ACSPECCK TCT NO OF STATIONS 3 ~( 1565 GS13 50C1967 0.00507 ) <~~ 1549 M0 1 40C1967 0.01370 ) 1 1405 ES 2 12MY1967 C.CC645 )" Species inoertae sedis- Aohnanthes sp. #1. 43 ACSPEC0A TCT NO OF STATIONS 1 ( 1547 PS 1 20C1?67 0.0C798~1 T Aohnanthes sp. #6. 44 ACSPECCF TOT NC CF STATIONS 2 ' 1265 C 2 ICAU1964 0.00224 ) ( 1350 BH 2 19AP1967 0.00441 ) 1 Aohnanthes sp. #7. 45 ACSPECCG TOT NO OF STATIONS 4 I 1259 F 2 6JL1964 0.CC31C ) ( 1260 F 3 6JL1964 0.00191 I ( 1270 F 1 10AU1964 0.00272 ) X.JA03 __XA_._2_ 1CMY196Z _.0...O26_15_.J 1 Aohnanthes sp. #10. 48 ACSPECCJ TCT NO OF STATIONS 2 1 1285 pi T5SeT964 ~~ "O"0582"~) V 1565 G~S1~3 5GC1967 0To0507 ) f 14 Aehnanthes sp. #13. 51 ACSPECCM TOT NO GF STATIONS 2 (46915 CH 20FE1946 0.00565 ) 146514 CH 19AP1946 0.00107 ) ( Aehnanthes sp. #14. 52 ACSPECON TOT NO CF STATIONS 1 ~7~1380 CS~i 9KY1967 0.0C168 ! ( Aehnanthes sp. #15. 53 ACSPECOO TOT NC CF STATIONS 2 I 1394 GS18 13MY1567 0.00172 ) ( 1397 GS21 13MY1967 C. 00065 I ( Aehnanthes sp. #16. 54 ACSPECCP TCT NO OF STATIONS 2 ( 1571 GS19 60C1967 0.0CU7 ) ( 1550 MR 1 50C1967 0.08673 I ( Aehnanthes sp. #17. 55 ACSPECGO TOT NO CF STATIONS 1 TT550 KR~T 50C1967 C. 16107 ) T Aehnanthes sp. #18. 56 ACSPECCR TCT NO OF STATIONS 1 I 1350 BH 2 19AP1967 0.00220 ) ( Genus Amph-ipleura Kiitz. Kutzing, Bacill., p. 103. 1844. Most freshwater species of the genus Amphipleiira find their primary habitat in periphyton communities. The two members of the genus that occur in our collections usually grow enclosed in gelatinous tubes. In eutrophied portions of Lake Michigan sizable populations of A. ■petlueida are often taken in plankton collections and these cells seem to be entirely free- living. Amphi-pleuj'a avt-ica Patr. and Freese Amphi-pleuva avtiea Patrick and Freese, Proc. Acad. Nat. Sci. Philadelphia, 112:170, pi. 1, fig. 14. 1960. 57 APARTICA TCT NC OF STATIONS 5 146921 CH 23N01945 C. 00065 I (4t'=15 CH 20FE1946 0 38 ) (46923 CH 22N01946 C.C0437 I 146919 CH 5.IN1947 0.C0910 ) 146768 EV 16HR1538 0. .jcdO ) 1 15 Amphipleura pelluoida (Kutz.) Kutz. Frustulia -pelluoida Kutzing, Linnaea, 8:543, pi. 13, fig. 11. 1833. Amphipleura pelluoida (Kutz.) Kutzing, Bacill., p. 103, pi. 3, fig. 52. 1844. 78 APPELLUC TCT ..c CF STATIONS 209 (60973 146.915 CH CH 1876 20FE1946 0.09447 1 0.01707 1 46921 46914 CH CH 23N01945 19AP1946 C. 00388 ) 0.00107 ) 469C8 46923 CH CH DE1945 22N01946 0.01007 ) 0.01530 ) (46920 (469?? CH CM 200E1946 21AU1947 0.00031 ) 0.00048 ) 46912 L4_626A__ CH EV AP1947 17JL1937 0.01150 1 0.01612 I 46919 46747 CH EV 5JN1947 1AU1937 C.CC910 ) C.CC495 ) (46752 ( 1773 EV P. 3 15SE1937 18KY1964 0.02177 ) 0.C1250 ) 46762 1224 EV B 4 18KR1938 18MY1964 0.02206 ) 0.01372 I 46766 1225 EV C 6 14DE1938 15MY1964 C.C3169 ) C.C1568 ) ( 1226 I 1779 C B_ 7 5 16MY1964 14MY1964 0.00381 I 0.13322 1 1227 1225 C" 2 E 2 13HY1964 16MY1964 0.00548 ) 0.02371 ) 1228 1231 0 E 2 3 14MY1964 16MY1564 0.00973 ) C.C3180 ) ( 1232 1 1735 E C 5 7 16MY1964 16JN1964 0.03131 ) 0.0C847 ) 1233 1439 B 3 e 6 5JN2964 5JN1964 0.02143 ) 0.01399 ) 1234 1236 B 3 1 18JN1964 8JN1964 C. 02812 ) C.C2625 ) 1 1237 1 1740 D 2 6 8JN1964 10JM964 0.05672 1 0.04295 ) 1238 1241 D 3 E 2 11 JN1964 13JN1964 0.01200 ) C. 01183 I 1239 /I242 C E 4 3 11JN1964 13JM964 C. 01741 ) O.C0450 ) ! 1243 1 1246 E F 6 3 13JN1964 11JN1964 0.03550 ) 0.12550 I 1244 1247 F 1 B 3 11JM964 14JL1964 0.02193 1 0.00854 1 1245 1440 F B 2 6 UJN1964 11JL1964 C.C6915 ) C. 00369 ) ( 1441 1. 1.25 3. B C 6 2 24JL1964 16JL1S64 0.00441 1 C.C1598 ) 1250 1254 C 6 C 2 10JL1964 15JL1964 0.01644 ) 0.01724 ) 1251 1255 C 0 7 5 16JL1964 15JL1964 O.CC290 ) C.C3850 ) ( 1256 ( 1259 E F 2 ? 14JL1964 6JL1564 0.02565 1 0.09916 ) 1257 1260 E 3 F 3 14JH964 6JL1964 0.01436 ) 0.07449 ) 1258 1264 F C« 1 1 6JL1964 10AU1964 C.C3540 ) C.CC193 ) ( 1266 ( 1269 D E 3 3 18AU1964 15AU1964 0.01754 ) 0.00822 I 1267 1271 D 6 C 7 18AIU964 22SE1964 0.00216 ) C. 00653 ) 1268 1272 E C" 2 1 15AU1964 10SE1964 18SE1964 16SE1964 17SE1964 15SE1964 C.C2462 I 0.00410 ) ( 1274 .1.12.7J. . D - . ..fi- E F 1 4 2 1 I7SE1964 18SE1964 16SE1964 15SE1964 0.01408 ) 0.00620 ) 0.00681 ) 0.04659 ) 1275 1278 1283 1286 0 2 C 6 17SE1964 18SE1964 0.00645 ) C. 00384 1 1276 1279 0 E 3 1 c. cilia ) C. 01571 ) ( 1280 ( 1785 E 5 F 2 16SE1964 15SE1964 0.C1839 ) 0.01095 ) 1284 1287 E F 6 3 0.04766 ) C.C2502 ) ( 1445 ( 1293 B .- 0_ D - _E_ 6 2 5 7 140C1964 15CC1964 140C1S64 120C1964 0.02283 1 0.00472 1 1289 1294 C 7 0 3 140C1964 150C1964 0.00879 ) 0.01978 ) 1290 1295 C D E E 1 4 1 5 160C1964 150C1964 120C1964 130C1964 C.CC379 ) C.CC595 ) [ 1296 -1-123-9- 0.0C393 ) 0.00314 ) 1297 1301 0 6 E 4 14CC1964 13QC1964 C. 00952 I C. 02208 ) 1298 1302 C.CC539 ) C.1C932 ) ( 1303 I 1306 E F 6 3 130C1964 110C1964 0.02799 ) 0.01663 ) 1304 13C7 F 1 B 6 11CC1964 N01964 0.00988 ) 0.01082 I 1305 1308 F C 2 7 110C1964 6N01964 C.CC345 ) C. 01825 ) ( 1316 ( 1319 D _E E F t 3 6 3 SN01964 7N01964 7N01964 6N(11964 0.00378 ) 0.01309 ) 1317 1320 E 1 E 4 6N01964 7N01964 0.00191 ) 0.00207 ) 1318 1321 E E 2 5 7N01964 7N01964 C.CC190 ) C.CC319 ) I 1322 1 1325 . 0.02999 ) _D_.-0.0252 l._ . 1323 ...-1.3.36 _ 1339 1342 F 1 C__3 6N01964 . 22JAJL967 0.00418 ) 0.00578 ) 1324 1337 F C 2 3 6NC1964 2MR1967 C.CC466 ) 0.01911 ) ( 1336 ( 1 141 C A 3 3 28MP.1967 19AP1967 0.01851 I 0.01193 1 C 5 A 4 28HR1967 19AP1967 0.02494 1 0.02346 ) 1340 1343 C A 7 6 2EMR1967 19AP1967 C.0C509 ) C.0C139 ) ( 1344 I 1347 C F 3 -Z -. . 25AP1967 . 23-AE1S6JL 0.0C331 ) 0.01301 1 1345 1348 C 5 E 5 25AP1967 23AP1967 C.07C17 ) 0.02056 ) 1346 1368 C A 7 3 21AP1967 4MY1967 C. 00534 ) C.CC943 ) ( 1369 L. 13.7.4.. A _E- A F 4 ? 6 ? 4NY1967 7MY1967 24MY1967 78MY1967 0.0C373 ) 0.C0598 ) 0.0C564 ) 0.01343 ) 1370 1375 1411 1415 A 6 E 3 3KY1967 7MY1967 0.01611 ) 0.00962 I 1372 1376 C E 5 5 5 c 5MY1967 6CY1967 31MY1967 28WY1967 C. 01773 ) C.C1124 ) ( 1410 ( 1414 C 3 E 3 31NY1967 28MY1967 0. 00821 ) 0.00225 ) 1412 1416 C E C. 04209 ) C.0C219 ) ( 1431 ... 1. 1434 A r. 3 5 12JN1967 17JN1967 0.C1030 ) 0.05C84 ) 1432 1435 A 4 C 7 13 JN 1967 13JM967 0.03576 1 0.00947 ) 1433 14 36 C E 3 ? 17JM967 15JN1967 C. 05167 ) C.0C362 J ( 1437 I 1447 E _JL C r. 3 4 5 5 15JN1967 -.11JL19..6J. 16JL1967 7SF1967 0.00269 ) _Qj-03-2J-_J_ 0.15424 ) 0.O0505 ) 1438 1448 1462 1511 E 5 A 6 14JN1967 10JL1967 0.01452 1 0.00354 ) 1446 1 1449 A C 3 3 11JL1967 16JL1967 C. 01712 ) C.C1911 ) ( 1450 ( l 5(19 E 2 E 2 14JL1967 1SE1967 0.01277 ) C. 01228 ) 1453 1512 E E 3 3 15JL1967 1SE1967 C. 01517 ) 0.CC785 ) ( 1513 1 137S E OS 5 7 31AU1967 9HY1967 0.00507 ) 0.00421 ) 1536 1379 E 2 GS 3 24SE1967 9HY1967 0.00818 ) C.C0928 1 ( 1542 1380 E GS 3 4 110C1967 9MY1967 C. 00509 ) 0.00336 ) ( 1381 ( 1185 GS OS 5 9 10MY1967 10MY1967 0.00477 ) 0.01177 ) 1383 1386 GS 7 GS10 10.IY1967 12HY1967 0.00267 ) 0.00862 ) 1384 1387 GS 8 GS11 10MY1967 12KY1967 C. 00370 1 C.C5149 1 ( 1388 ( 1391 GS12 OS15 12MY1S67 12MY1967 0.00603 ) 0.02394 I ( 1389 1392 GS13 GS16 12MY1967 12MY1967 0.01547 ) 0.00616 ) 1390 1393 GS14 GS17 12NY1967 13HY1967 C. 00587 ) C.C1918 ) ( 1394 1 )397 GS18 r,s?i 13MY1967 13MY1967 0.18578 1 0.00458 I 1395 1398 GS19 GS22 13KY1967 14MY1967 0.04932 ) 0.03947 ) I 1396 1554 GS20 GS 1 13MY1967 30C1967 C. 00148 ) C.C2846 } ( 1555 ( 156? GS 2 GJS10.. GS15 osia 30C1S67 50C1967 50C1967 5nr,1967 C.01C59 I 0.01234 ) 1557 1563 GS 4 GS11 30C1967 50C1967 0.00374 ) C. 09821 ) ( 1559 1566 GS 7 GS14 40C1S67 50C1967 C.CC35C ) C. 00183 ) ( 1567 ( 1570 0.00635 ) 0.3074? 1 1568 1571 GS16 r,si9 5CC1967 60C1967 0.11255 r C. 09074 1 1569 1577 GS17 GS20 50C1967 60C1967 C. 34784 ) C.C2794 ) ( 1573 ( 15_2J__ GS21 SH 1 60C1967 18SE1967 0.17359 1 0.0C577 1 1574 1523 GS22 RA 1 6CC1967 19SE1967 0.00863 ) 0.00923 1 1575 ( 1526 GS28 PC 1 60C1967 2CSE1967 C. 36125 1 C.C1707 ) ( 1551 ( 1553 ES SG 1 1 50C1967 60C196 7 0.15177 I 0.11751 1 1552 1426 SM 1 PS 2 60C1967 29KY1967 0.02641 I 0.02100 ) ( 1550 ( 1351 CR 1 2 50C1967 21AP1S67 C. 43365 ) C.C0310 ) ( 142 7 ( 1401 MCI FR Cj» 2 ? 2 ? 29MY1967 6MY1967 0.08475 1 0.00588 ) 1417 14C2 HO 2 TR 2 22MY1967 6KY1967 0.00374 ) C. 01083 ) ( 1425 ( 1352 RA KM 2 2 25HY1967 21AP1967 C.CC884 ) C. 01718 ) ( 1353 1 1403 23AP1967 10MY1967 0.02110 ) 0_,Q2615 L 1354 1405 GH 2 ES 2 25AP1967 12MY1967 0.00173 ) 0.05805 1 ( 1429 ( 1407 ML SM 2 ? 29MY1967 14HY1967 C. 01062 ) C. 04777 ) ( 1349 (- 1423 CI 2 2 19AP1967 25^1967 0.00359 ) 0.0C856 ) 1419 1424 BU 2 KK 2 23MY1967 25MY1967 0.05492 ) 0.02665 ) 1422 GA 2 23MY1967 C. 00511 ) 16 Genus Amphiprora Ehr. Ehrenberg, Ber. Akad. Wiss. Berlin, 1840:10. 1841. The single species of the genus Amphi-prora that occurs in our collec- tions finds it primary habitat in the epipelic community. It is, however, a successful facultative planktont and a few specimens can be found in many plankton collections from the Great Lakes. Because of its striking mor- phology it is easily identified and is more widely reported than many more abundant euplanktonic species. Amphipvora ornata Bailey Amphiprova ornata Bailey, Smithson. 15, 23. 1851. 79 ARCRNATA TOT NO OF STATIONS . 1 15.. Cont. Know!., 2:38, pi. 2, figs. 161973 CH 1876 0.07085 ) 1 3540 CH CH Ch UPY1879 23N01945 19AP1946 0.02330 ) 0.02975 1 0.04378 ) 1 3541 1469C8 146924 CH CH CH 1FE1881 DEi945 10CY1946 C.1C760 ) 146910 146917 CH CH 0C1945 12JA1946 0.00109 ) 0.0C638 ) (46 921 146914 C.C2C14 ) C. 06349 ) 146923 (46909 CH ... CH. CH . .CH tv EV 22N01946 MR1947 0.20326 ) 0.0 364 3 1 0.01460 1 0.0C87J | 0.02141 ) 0.12893 ) (46920 (46912 (46919 (46758 (46745 (46757 CH CH 20CE1946 AP1947 0.C1356 ) 0.01150 ) C.C0455 ) 0.02496 ) 146905 [46916 146907 146771 CH CH Ch EV EV EV JA1947 4MY1947 JL1947 11JN1937 9JL19 3 7 1AU1937 C.C2696 ) C.CC5C9 ) (46906 146322. HY1947 21AU1947 2PJN1937 17JC1937 Ch EV 5JN1947 5JN1937 C.C2219 ) C.0C951 ) (46743 (46764 EV EV 3J11937 25J11937 0.C8359 1 0.00963 ) (46770 (46747 C.C3578 ) C.C2971 1 146763 {46760 EV EV 23AU1937 22SE1937 130C1937 27AP1938 15MY1964 16MV1964 C. 02029 1 0.01970 ) 0.02135 ) 0.QC3..36 ) 0.0C 39 2 ) 0.00593 ) (46765 (46 750 (46767 (46759 1 1228 1 1231 EV EV 30AU1937 24SE1937 270C1937 19MY1938 14MY1964 16MY1964 0.08366 ) 0.00471 ) C.C1934 j 0.00333 I C. 00195 1 0.00245 ) (46752 (46744 (46768 146761 I 1229 1 1232 EV EV EV EV D 5 E 5 15SE1S37 60C1937 16MR193E 27MY193S 14MY1964 16MY1964 C.C2177 ) C. 01463 ) I4674S 146.73.6 ( 1225 ( 1230 EV FV c F 6 ? EV EV C 2 E 3 C.C147C ) C.C1635 ) C.CC211 j 0.0C348 ) 1 1234 ( 1248. B B 3 3 18JN1964 24JL1964 0.00843 1 0.00197 1 C.0C383 ) 0.00944 ) 0.00381 ) 0.00193 ) I 1240 1 1440 { 1256 { 1260 1 13C6 1 1318 0 6 B 6 i 2 F 3 F 3 E 2 10JN1964 11JL1964 14JL1964 6JL1964 110C1964 7N01964 0.C0153 ) C. 00369 ) 0.00366 ) 0.00382 ) 0.00277 ) C.C019D ) ( 1244 ( 1249 ( 1257 1 1285 ( 1310 1 1320 F 1 C 3 E 3 F 1 C 2 E 4 11JN1964 8JL1964 14J11964 15SE1964 10N01964 7N01964 C.CC219 1 0.00272 ) 1 1254 t. 1258 D jF_ 2 1_ , 15JL1964 . -6.J1.1964 140C1964 9NG1964 C.CC239 ) C. 01165 ) 1 1297 ( 1313 0 D 6 3 C.CC227 ) C.CC207 ) 1 1321 I .13.71 E C A A A GS 5 3 6 4 4 6 7N01964 4MJU96 7 24MY1967 13JN1967 11JL1967 10KY1967 0.0C319 ) . C..0C231 ) O.0C564 1 0.00255 ) 0.00234 ) 0.0C278 I 1 1339 1 1376 ( 1412 ( 1436 1 145C ( 1383 C 5 E 5 C 5 E 2 C 5 GS 7 28PR1967 6MY1967 31KY1967 15JN1967 16JL1967 10MY1967 0.00312 ) 0.00281 ) ( 1344 ( 14C9 C 3 A 4 25AP1967 23MY1967 25MY1967 11JH967 9MY1967 12MY1967 C.C0165 ) C.CC298 ) ( 1410 L 1432. ( 1447 1 13B? C. 00421 ) 0.00362 ) 0.00762 ) 0.00267 ) ( 1413 ( 1446 ( 1379 ( 1387 C 7 A 3 GS 3 CSU C.0C632 ) C.0C245 ) C.0C309 ) C.C1188 ) 1 1388 1 1391 GS1 GSI GS] . gs; .2 i5 .8 !1 L6 19 12MY1967 12KY1967 13PY1967 _13^Y1967 50C1967 6CC1967 0.10256 ) 0.03352 ) 0.07741 ) 0.00589 ) 0.00433 ) 0.00059 ) ( 1389 ( 1392 1 1395 1 1398 1 1569 1 1572 GS13 GS16 GS19 GS22 GS17 GS20 12KY1967 12NY1967 13MY1967 14NY1967 50C1967 60C1967 0.00258 ) 0.01849 ) C. 01996 ) C. 00607 ) 0.02230 1 C. 00090 ) ( 1390 ( 1393 CS14 GS17 12MY1967 13MY1967 C. 01174 ) C.C3561 1 ( 1394 ... 1 13.91 ( 1396 ( 1567 ( 1570 ( 1573 CS20 C-S15 GS18 CS21 13HY1967 5CC1967 50C1967 6CC1967 C. 00222 ) C. 00953 ) ( 1568 I 1571 GS] GS] C.C2967 ) C.CC112 ) ( 1574 ( 1350 1 14.0 A... GS22 MR 1 BH 2 r.A ? SM 2 GA 2 ... 60C1967 50C1967 19AP1967 10MY1967 14MY1967 73MY1967 0.00863 1 0.01239 ) 0.00661 I 0.01308 ) 0.03583 ) 0.00511 1 1 1575 { 1553 I 1400 ( 1404 ( 1349 1 GS28 SG 1 SB 2 HC 2 60C1967 6CC1967 6MY1967 10MY1967 C. 00516 ) C. 02938 I 0.01191 ) 0.02541 ) ( 1526 1 1417 1 1352 1 14C5 fO 1 hC 2 KM 2 ES 2 20SE1967 22MY1967 21AP1967 12MY1967 C.CC569 I C.CC748 ) C.0C859 ) C.C1935 ) 1 1407 ( 14?? CI 2 19AP1967 0.00359 ) ( 14C6 C8 2 13MY1967 C.CC270 ) Genus Amphora Ehr. Ehrenberg, Ber. Akad. Wiss. Berlin, 1840:205. 1841. Most members of the genus Amphora find their primary habitat in peri- phyton communities where they grow attached to filamentous algae or to aquatic vascular plants. Some species grow attached to the larger forms of euplanktonic algae and are occasionally found in abundance in plankton col- lections. Although attached growth is usual in the genus it is not obligate and many, particularly the larger, species are found in abundance in epipe- lic communities. A number of unusual and apparently undescribed forms occur in our collections. This highly diverse flora appears to have its closest counterpart in the Siberian flora, particularly that associated with ancient Lake Baikal. It is suspected that this apparent disjunct distribution is more the result of lack of sufficient collection stations from large boreal lakes than from a truly disjunct distribution. 17 Amphora oalvmetioa (Thomas) P er. Amphiprora oalvmetioa Thomas, Notarisia, 2:328. 1887. Amphora oalwnetica (Thomas) Peragallo, Cat. Gen. Diat. Mills, 1933; original reference not available). 1897. (fide .. 5 .a_ AfiCALU HE_JlCT_!s£_ STATIONS 36 (46905 CH _i46919 CM (46758 i4ia&j4_ (46765 (46750 EV (46749 EV EV EV -£V ( 1341 A 3 .-L.1526__SQ_1. ( 1545 WL 1 ?3Nni945 n.nni;o ) '4tci7 JA1947 5JN1947 5JN1937 -Jiuoaaz. 0.00123 ) 0.0015? ) 30AU1937 ' 24SF1937 0.05349 I 12MR1938 -_Z2££1S3J_ 0.00558 ) 0.00471 I 19AP1967 _2flS£i26J_ 0.02427 ) 0.00504 )_ 0.00108 ) _CU0_C_569_L (46916 (46907 (46771 (46757 (46752 (46748 (46768 (46759 ( 1542 J 1527 CH CH EV EV EV EV EV EV E 3 TR 1 2001967 0.00676 ) ( 1426 " MS 2 12JA1946 C.onn?8 l (AftQjq 4MY1947 JL1947 11JN1937 25JL1937 15SE1937 130C1937 16KR1936 19MY1938 UQC1967 _2iSE1967__ 0.00068 ) C. 00099 > 0.00238 I 0.02407 ) 0.02177 I C. 04270 I 0.01470 ) C.C0675 I C. 00509 ) _P. 01887 ) (469C6 (46922 (46770 (46747 (46760 (46767 (46762 ( 12 79 < 1574 ( 1530 29MY1967 C. 01050 ) ( 1423 CH CH EV EV EV EV EV E 1 GS22 _FR 1 t>A 2 2QCE1S46 o-nnnii i HY1947 21AU1947 9JL1937 1AU1937 22SE1937 27CC1937 Amphora oruoifera A. Cleve Amphora oruoifera A. Cleve, Acta Forest. Fennica, 22:53. 1922. 18MR1S38 16SE1964 C.0C133 I _jOi00145^X 0.00596 ) _C.C2228 ) 0.01477 ) C.CC387 I 60C196 7 24SE1967 C. 11028 I 0.00393 ) C.0C575 ) C.C10O0 1 25HY1967 C. 00428 ) 59 AMCRUCI0 TCT NC CF STATIONS ( 1520 HO 1 ( 1400 SB 2 18SE1967 6MY1967 0.00471 ) 0.00596 ) ( 14C1 < Amphora montana Krasske Amphora montana Krasske, Hedwigia, 72(3):119, pi. 2, fig. 27. 1932. 60 AMMONTAN TCT NC CF STATICNS 0.C1762 ) Amphora normani Rabh. Amphora normani Rabenhorst, Fl. Europaea Alg., p. 88. 1864. 61 AfNGRCAN TCT NC CF STATIONS 1 ( 1350 8H 2 19AP1967 0.CC220 I ( Amphora ovalis (Kutz.) Kiitz. Frustulia ovalis Kiitzing. Linnaea, 8:539, pi. 13, fig. 5. 1833. Amphora ovalis (Kutz.) Kutzing, Bacill., p. 107, pi. 5, figs. 35, 39. 1844, 62 AP0VALIS TOT NO OF STATIONS 37 (60973 (46917 CH CH CH r.H 16 76 12.IA1946 CR1947 5JN1947 0.04724 ) .^OjXU30_2a ) __ C. 00455 1 0.00152 1 0.02177 J C. 00307 ) ( 3541 (46924 CH CH 1FE1881 jaNJO.946 C. 01956 ) 0.00141 1 (46921 (46920 CH CH 23N01945 200E1946 C. 00065 ) G.C0185 ) (46909 __ 146919 (46916 (46922 (46762 ( 1270 CH CH 4KY1947 21AU1947 0. 00034 ) 0.00145 ) (46906 (46747 CH ev MY1947 1AU1937 C.0CC66 ) C.C1238 ) (46752 1 1?40 EV n 6 15SE1937 10JN1964 EV F 1 18KR1938 10AU1964 0.02206 ) 0.00272 I (46756 ( 1279 EV E 1 27AP1S38 16SE1964 C.0C168 ) 0.CC393 ) ( 1284 ( 1346 E 6 r. 7 GS16 RSI 5 GS22 TR 1 17SE1964 21AP1967 12MY1967 5J1C19_6J_ 6GC1967 70SF1967 0.00318 ) 0.00134 ) C.0C925 ) _ Qjfl.CJj.3 5 _J __ 0.02013 ) 0.0C629 ) ( 1297 ( 1388 D 6 GS12 140C1964 12CY1967 0.00190 ) 0.00603 ) ( 1305 ( 1389 F 2 GS13 110C1964 12MY1967 C.0C173 ) 0.00258 ) ( 1392 I 1567 _ ( 1393 . __L..l56iL_ ( 1546 ( 1545 GS17 _. G_S 16.. 13MY1967 5CC1967 0.00274 ) 0. 00144 ) ( 1565 < 1573 GS13 GS21 50C1967 60C1967 C. 00507 ) C. 00112 ) ( 1574 f 15?7 LU 1 ML 1 20C1967 2CC1967 0.00500 ) C. 06081 1 ( 1520 ( 1350 HO 1 6H 2 18SE1967 19AP1967 C. 00943 ) ( 1402 TR 2 6MY1967 0. 00541 ) ( 18 Amphora ovalis var. gracilis (Ehr.) V. H. Amphora gracilis Ehrenberg, Abh. Akad. Wiss. Berlin, 1841:410, pi. 3 (I), fig. 43. 1843. Amphora ovalis var. gracilis (Ehr.) Van Heurck, Syn. Diat. Belgique, p. 59. 1885. Coll: 1193. Amphora ovalis var. libyca (Ehr.) Cleve Amphora libyca Ehrenberg, Ber. Akad. Wiss. Berlin, 1840:205. 1841. Amphora ovalis var. libyca (Ehr.) Cleve, K. Svenska Vet. -Akad. Handl., Ser. 2, 27(3):104. 1895. 63 AMQVALVL TOT KC CF S7ATICNS 107 ( 3540 CH -L4691A CH_ (46915 CH .J 46323 CH_ (46763 _L44252__ (46744 -L46749. (46751 J-46_T6_L ( 1258 ( 1270 I 1279 ( 1306 ( 1546 ( 1527 EV EV EV _EJL_ F 1 JE_1_ E 1 F 3 ( 1341 A 3 ( 1541 E 2 ( 1387 GSU _i_L390 GS14 ( 1394 GSie ( 1554 GS 1 ( 1560 GS 8 J._15M_ GS14 ( 1572 GS20 1 JL5AA_ WU 1 LU 1 TR 1 ( 1530 FR 1 I J 5.5 2. SM 1 ( 1351 MI 2 -IJL3SSL PJL2_ ( 1400 ( 1349 SB 2 _CJ_2_ 11MY1879 QC_1945_ 0.0C466 I 0.00546 ) ( 3J41 (46921 CH CH 20FE1946 22N01946 0.01707 ) -_9_.„03497__) (46S14 (46920 1FE1881 23N01945 0.05 869 ) 0.03363 ) CH CH 19AP1946 20061946 0.01708 ) 0.01541 ) ( 3507 (46917 CH CH 5JN1947 0.01?14 ) Ktf-c.Cl 5JN1937 17JL1937 0.12481 ! 0.13699 ) 23AU1937 15SE1937 (46771 (46757 _iH. EV EV 0.56818 ) 0.34828 ) (46765 (46760 EV EV 60C1937 12MR1938 3CMR1938 27MY1938 0.02439 I 0.02427 ) (46748 (46768 0.02233 I 0.C218C ) EV EV (46756 (46766 6JL1964 10AU1964 0.00472 ) „0. 00545 ) EV _£V„ 16SE1964 UOC1964 0.02356 ) 0.00277 I ( 1259 ( 1275 F 2 D 2 19AP1967 U0C1967 0.00108 ) 0.00532 ) ( 1285 ( 1337 F I C 3 12KY1967 12HY1967 C. 03961 ) 0.03523 ) ( 1343 _[ 1382 A 6 GS 6 13MY1967 3QC1967 ( 1388 ( 1391 GS12 GS15 0.00860 I 0.01067 ) 40C1967 50C196 7 0.00472 ) 0.00367 I ( 1397 ( 1557 GS21 GS 4 ( 1564 ( 1567 60C1967 2CC1967 0.00180 I 0.00477 ) .20C1967 2CSE1967 ( 1573 _!_15V7_ GS12 GS15 0.04502 ) 0.13208 ) ( 1520 ( 1528 GS21 HS 1 24SE1967 6GC1967 21AP1967 5MY1967 0.05001 I 0 JJ066C_L 6.003io I 0.C0680 ) ( 1545 _l_1553_ HO 1 SB 1 ML 1 -_SG 1 6MY1967 19AP1967 0.01191 ) 0.00359 ) ( 1417 1 1401 HC 2 WO 2 ( 1354 ( 1406 GH 2 G8 2 4MY1947 J11947 11JN1937 25JL1937 0.00407 ) 0.00296 ) (46924 (469C5 CH CH 30AU1937 22SE1937 130C1937 16WR1938 0.01426 ) 0.03852 I (469C6 (46922 (46743 (46747 CH CH EV EV C. 00558 ) 0.00492 I 0.02135 I C. 19109 ) (46769 (46750 EV EV 27AP1938 14DE1938 0.00336 ) C. 07921 ) (46767 (46762 EV EV 6JL1964 17SE1964 15SE1964 2ER1967 0.00620 ) 0.01290 1 (46759 ( 1240 EV 0 6 19AP1967 10MY1967 0.01165 I 0.00147 ) ( 1260 ( 1278_ ( 12 86 ( 1340 12HY1967 12KY1967 C.0O069 ) 0.00278 ) 13MY1967 30C1967 0.07B43 ) 0.00479 ) ( 1536 <_1385_ "( 1389 ( 1392 5GC1967 50X1967 C. 00131 ) 0.00747 ) ( 1398 I 1558 0.00494 ) 0.08891 ) ( 1565 ( 1569 60C1967 2DC1967 0.00112 ) 0.01597 ) 18SE1967 20SE1967 0.00943 ) 0.02888 ) ( 1574 ( 1524 20C1967 60C1967 22MY1967 6WY1967 0.07433 ) 0.02203 ) ( 1526 ( 1529 25AP1967 13MY1967 0.01122 ) 0.02940 ) 0.00173 ) 0.00270 ) ( 1549 ( 1428 ( 1350 ( 1402 ( 1404 I F 3 _D 6 F 2 C 7 E 2 GS 9 GS13 _GS16 GS22 GS 5 19FE1881 12JA1946 10MY1946 JA1947 20JN1937 _AAU_1937^ 7SE1937 _24SE1_937 C.C1132 ) 0.00998 1 C.C0423 ) 0.00735 ) HY1947 C. 01062 I 21AU1947 C.C4943 ) 270C1937 18MR1938 0.02141 ) _C.07674 ) 0.02171 ) C. 03299 ) C. 03481 ) C. 26467 ) 19MY1S38 C.CC338 ) 10JN1964 C.CC460 ) 6JL1964 C.CC191 ) _18SEi964 C.C0384 I 15SE1964 28MR1967 24SE1967 10MY1967 C.C1095 ) C. 00073 ) C.CC818 ) _C. 00235 ) CS13 GS17 12HY1967 C.C1547 7 12MY1967 C. 01233 ) 14KY1967 0.01214 I 40C1967 C.CC396 ) CS22 KI 1 50C1967 5_0C1?6JL C.13690 ) __C.CC446 ) KO 1 KH 1 CO 1 KU 2 BH 2 ~ TR 2 60C1S67 C. 18409 ) 2CSE1967 C. 02189 ) 20SE1967 0.02276 ) 20SE1967 C. 03598 ) CC 2 40C1967 C.C2741 ) ^9MY1967 C.0C301 ) 19AP1967 C.C1542 ) _6KY1967 C. 02166 ) 10HY1S67 C.02541 ) Amphora ovalis var. pediculus (Klitz.) V. H. Cymbella 1 pediculus KUtzing, Bacill., p. 80, pi. 5, fig. 8; pi. 6, fig. 7. 1844. Amphora ovalis var. pediculus (Klltz.) Van Heurck, Syn. Diat. Belgique, p. 59. 1885. 19 .64 -AJ*DVAUi£JfiT_ND__CF_.SJ_AJXC!vS 139__ (6C973 CH 1676 0.18895 1 ( 3541 Ch 1FE1881 0.01556 ) (46910 CH 0C1945 (46921 (46914 CH CH CH _cn CH FV 23NQ1945 19AP1946 JA1947 MY1947 21AU1947 17.11 1937 C. 00129 ) 0.00107 ) 0.0C49C ) 0.00332 1 0.00194 ) 0.14504 1 (46917 (46524 CH CH 12JA1946 10MY1946 0.00083 1 0.00282 ) (46915 (46923 CH CH 20FE1946 22N01946 0.02276 ) (46905 14&306 (46509 (46519 CH CH MR1947 5JN1947 0.02277 ) 0.00759 ) (46916 (46907 CH Ch 4MY1947 JL1947 0.00068 1 C. 00049 ) (46922 (46764 (46758 (46757 EV EV 5JN1937 25JL1937 C. 06062 1 C. 03370 ) (46770 (46747 EV EV 9JL1937 1AU1937 C.0C596 ) (46763 (46760 FY 23AU1937 22SE1937 0.54789 ) 0.00492 ) (46765 (46750 EV EV 7SE1937 24SE1537 0.02171 ) C. 02357 ) (46752 (46744 EV EV 15SE1937 C. 34828 ) (46748 .. ( 46.Z6B __ EV FV EV F i 13CC1937 16MB 153.8. 19MY1938 11JN1964 0.44833 1 0.23519 I 0.0C675 ) 0.CC325 ) (46767 (46762 ( 1241 ( 1245 EV EV E F 270C1937 18MR1938 0.01547 ) C. 39700 ) (46749 (46751 EV EV 12HR1938 30MR1938 C. 04855 ) 0.02233 I ( 1744 2 2 13JN1964 11JN1964 0.00148 ) 0.00346 ) ( 1243 ( 1258 E F 6 1 13JN1964 6JL1564 C. 00418 ) C.C1416 ) ( 1260 ( 1770 F F 3 1 6JL1964 1CAU1964 0.00191 ) 0.01634 ) ( 1265 ( 1272 ( 1275 ( 1285 C c 2 1 10AU1964 10SE1964 0.00224 1 C. 00410 ) ( 1268 ( 1274 E 0 2 1 15AU1964 17SE1964 C.C2188 ) ( 1275 L. 1284 D E. E F 2 6 3 ?. 17SE1964 17SE1964 130C1964 110C1964 0.00645 ) 0.0C635 ) 0.00358 ) 0.03105 1 E F 1 1 16SE1564 15SE1964 0.02749 ) 0.32031 ) ( 1282 ( 1297 E 0 4 6 16SE1964 140C1964 c.ciioa ) C.CC190 ) ( 1300 ( 1305 ( 1303 ( 13C6 E F 6 3 13CC1964 110C1964 0. 00560 ) 0.01109 ) ( 1304 ( 1317 F E 1 1 HOC 1964 6N01964 C. 03457 ) C.0C191 1 ( 1323 I 145? F 1 7 6N01964 14Jt 1567 0.00139 ) 0.00426 ) ( 1346 ( 1511 C E 7 2 21AP1567 1SE1967 0.00134 ) 0.00307 ) ( 1450 ( 1512 C E 5 3 16JL1967 1SE1967 0.00190 ) ( 1537 ( 154? E 3 F 3 GS 7 GS17 24SE1967 110C1967 0.00431 ) C. 00509 ) ( 1538 ( 1543 E E 5 5 23SE1967 10CC196? C. 02762 1 0.00718 ) ( 1541 ( 1380 E GS 2 4 110C1967 9MY1967 C. 00532 ) C. 00168 1 ( 1383 ( 13Rfi 10MY1967 17MY1967 0.00267 1 n. 04877 1 ( 1384 ( 1389 GS GS1 8 3 10MY196' 17MY1967 C. 00185 ) 0.01789 1 ( 1386 ( 1390 CS10 GS14 12MY1967 C.CC575 ) ( 1392 ( 1395 GS16 GS19 12MY1567 13HY1967 0.0C616 ) 0.0C235 ) ( 1393 ( 1396 GS17 GS20 13 MY 196 7 13MY1567 0.00548 ) 0.00592 ) ( 1394 ( 1397 GS18 CS21 13MY1967 13MY1967 C.CC516 ) C.0C196 ) 1 1398 ( 1556 GS22 GS 3 14MY1967 30C1S67 0.02429 1 0.01043 ) ( 1554 ( 1557 GS GS 1 4 30C1967 30C1967 0.00712 1 0.00747 ) ( 1555 ( 1558 GS GS 2 5 30C1967 40C1967 C. 01412 ) C.C1586 ) ( 1559 ( 1565 GS 7 CS13 40C1967 50C1967 0.00350 ) 5.3240C 1 ( 1560 ( 1566 GS 8 GS14 40C1967 5CC1967 0.00945 ) 0.00367 1 ( 1562 ( 1567 C-S10 GS15 50C1967 50C1967 C.0C247 ) C.1C161 ) ( 1568 ( 1573 GS16 GS71 50C1967 60C1967 0.00144 ) 0.01904 ) ( 1571 ( 1574 GS19 GS22 60C1967 60C1967 0.00293 ) 0.67307 ) ( 1572 ( 1575 GS20 GS28 60C1967 60C1967 C.C1262 ) C.0C774 ) ( 1544 ( 1520 MU HO 1 1 20C1967 18SE1967 0.03336 ) 0.01414 ) ( 1547 ( 1521 MS SH 1 1 2DC1967 18SE1967 0.03194 ) 0.03462 ) ( 1546 ( 1522 lu en 1 1 20C1567 18SE1967 C. 50518 1 C. 00365 ) ( 1523 1 1578 RA SB I 1 19SE1967 2CSE1967 0.01845 I 0.07219 ) ( 1526 ( 1529 HO Kk 1 1 20SE1967 20SE1967 0.32429 ) 1.00731 ) ( 1527 ( 1530 TR FR 1 1 20SE1967 24SE1967 1.00629 ) C. 21002 ) ( 1545 S 1551 ML ES 1 1 2CC1967 5CC1967 1.83796 ) 0.03195 ) 1 1548 ( 1552 CA SM 1 1 30C1967 6DC1967 0.01272 1 0.05282 ) ( 1549 ( 1550 CO MR 1 1 40C1967 50C1967 0.06852 ) 1.98241 ) C.eel89 ) C.C1869 ) ( 1553 _L 135L SG HI BH TR 1 2 2 2 60C1967 21AP1967 19AP1967 6MY1967 0.10282 ) 0.00621 I ( 1428 ( 1427 MU LU 2 2 29MY1967 29MY1967 0.00301 ) 0.01211 I ( 1426 ( 1417 MS HO 2 2 29MY1967 22MY1967 ( 1350 ( 1402 0.38766 ) 0.03249 ) ( 1399 ( 1400 PU SB 2 2 5MY1967 6MY1967 0.00680 1 0.00596 ) ( 1401 ( 1352 MO KW 2 2 6MY1967 21AP1S67 C. 05292 ! C. 00859 ) ( 1353 - _ (-IA0.3 FR _CA 2 2 23AP1967 1CMY1967 0.02110 ) 0.02615 1 ( 1354 ( 1404 GH 2 2 25AP1967 10MY1967 C. 01381 ) 0.26677 1 ( 1429 ( 1405 kL ES 2 2 29MY1967 12MY1967 23MY1567 C.C1062 ) C. 00645 ) C.CC511 ) ( 1407 X_IA23 SM _ _haL 2 7 14MY1567 25MY1967 0.22691 1 0.00428 ) ( 1349 L CI 2 19AP1967 0.01437 I ( 1422 GA 2 Amphora rotunda Skv. Amphora rotunda Skvortzow, Phillipine J. Sci., 62(3) :342, pi. 12, fig. 18. 1937. 65 AMROTUNQ TCT NC CF STATIONS _S*S$HX ) I.... Amphora siberiaa Skv. and Meyer Amphora siberioa Skvortzow and Meyer, Proc. Sungaree River Biol. Sta., 1(5):36, pi. 3, fig. 168. 1928. . 66 AMSIBIRI TCT NO GF STATIONS (46758 FV EV F 1 5JN1937 15SE1937 6JL1964 0.01426 ) (46743 EV 20JN1937 0.00856 ) (46747 EV 1AU1937 C.0C495 ) (46752 1 1758 0.04354 ) 0.0C736 1 (46744 ( 1546 EV LU 1 60C1937 20C1967 0.00488 ) 0.01501 ) (46762 ( 1545 EV WL 1 18MR1938 20C1967 C. 02206 ) O.C2703 1 ( 1427 1 li5_4_. LU 2 GH 7 29HY1967 75AP1967 0.01211 ) __0_,S_Q123__]L__ ( 14C2 ( TR 2 6MY1967 0.01083 ) ( 1400 SB 2 6MY1967 C.C0596 ) Amphora veneta Kutz. Amphora veneta Kutzing, Bacill., p. 108, pi. 3, fig. 24. 1844. 67 AMVFNFTA TCT NC CF STATIONS 4 (46916 CH 4MY1947 0.00136 1 ( 1240 D 6 10JN1564 0.00153 ) ( 1350 EH 2 19AP1967 C.0C441 1 ( 1406 GB 2 13MY1967 O.OC270 I ( 20 Species incertae sedis Amphora "veneta var. angularis" (not published) 68 ANVENEVA TOT NO OF STATIONS (46770 1 ...1551. EV _£S__j4_ 9JL1937 30C1967 0.0C596 ) 0.O0374 ) ( 1254 1 1565 C 2 GS13 15JU964 5QC1967 0.00192 I 0.00507 ) ( 1268 ( 1574 E 2 GS22 15AU1964 6QC1967 0.00274 ) C. 00288 ) Amphora sp. #1. . _6i^AHS£££flA JL0JL_MLCF_ ( 1574 GS22 1964 60C1967 15SE1964 0.00582 ) ( 1393 Amphora sp. #3. 70 AMSPECOC TCT NG OF STATIONS 10 < 1258 F 1 6JL1964 ( 1391 GS17 13MY1567 0.00236 ) 0.00274 ! 1 1279 ( 1554 E 1 GS 1 16SE1964 30C1967 0.00393 1 0.00356 ) < 1543 ( 1565 E 5 GS13 10CC1S67 50C1967 C.CC718 I C.C5578 ) ( 1546 LU 1 2CC1967 ( 15511 MR 1 5CC1967 0.00500 ) C. 01239 ) ( 1526 ( MG 1 20SE1967 0.00569 ) ( 1545 kL 1 2CC1967 C. 07433 ) Amphora sp. #4. 71 A>. ex Kiitz.) Hust. Navicula aponina var. brachysira de Brebisson ex Kiltzing, Sp. Alg., p. 69. 1849. Anomoeoneis serians var. brachysira (Br£b. ex Kutz.) Hustedt in: Pascher, Slissw.-Fl. Mitteleuropas, Heft 10, Aufl. 2, p. 264, fig. 427. 1930. 80 ANSFRVBO TO NO CF STATIONS 1_ 1285 F 1 i5 i Anomoeoneis vitrea (Grun.) Ross Gomphonema vitrewn Grunow in: Schneider, Naturw. Beitr. Kenntn. Kaukasuslander, p. 110. 1878. Anomoeoneis vitrea (Grun.) Ross ex Reimer in: Patrick and Reimer, Acad. Nat. Sci. Philadelphia Monogr., 13:380, pi. 33, figs. 12-13. 1966. 81 ANVITREA TOT HC CF STATIONS 33 (46924 CH 10MY1946 0.0C071 1 146905 CH JA1947 0.00123 ) (46916 CH 4MY1947 C.CC17C ) (46919 OH _EV 5JN1947 17JL1937 0.24582 I 0.03223 ) I46S13 (46757 OH EV 6AU1947 25JL1937 0.03138 ) 0.02889 ) (46922 (46747 CH EV 21AU1947 1AU1937 C.0C048 ) C.CC495 ) (46763 EV EJL F E 2 2 23AU1937 16KR1938 0.06088 ) 0.01470 ) (46752 (46762 EV EV 15SE1937 18MR1938 0.04354 ) 0.02206 1 (46750 (46751 EV EV 24SE1937 30MR1938 6JL1964 15SE1964 C.0C471 ) C. 01117 ) ( 1245 ( 1768 UJN1964 15AU1964 0.0C346 ) 0.00274 ) ( 1258 ( 1270 F 1 F 1 6JL1964 10AU1964 0.00944 ) C. 01906 ) ( 1260 ( 1285 F 3 F 1 C.CC191 ) C.C5241 ) 1 1452 J[__15 54__ ( 1545 WL 1 ( 15 50 PR_1_ E 2 _6S_L 14JL1967 0.CC426 ) ( __30C196J 0.00356 J t 20C1967 0.00676 ) ( _50C1967 0.02478__I 1380 1565 _ GS 4 GS13 1549 NO L.1403 CA_ 9KY1967 0. 50C1967 _C. 00168 ) 00507 ) 40C196 7 C 10MY1967 0 ,01370 ) ,065_3j>_J ( 1394 1 1546 1551 _L404_ GS18 LU_J_ ES 1 13HY1967 C. _ 20C1967 j:, 50C1967 C. _10MY1967 _0_. CC172 ) CC500 ] CC799 ) 02541 ) 22 Species -ineertae sedis Anomoeoneis vitrea var. 1. 8.2 . _ANV MRVA TOT KC CF S7ATICNS. 14-69A3. CB 6ALL947 __0j0 1046 I __l 1285 __ jj 15561964 0.02912 1 ( 1575 GS28 60C19611 C.0C129 ) 1 1403 CA 2 ICPY1967 0.01308 1 ( 1404 NIC 2 10MY1967 0.01270 ) t Genus Asterionella Hass. Hassall, Micr. Exam. Water, p; 10, pi. 2(2), fig. 5. 1850. Asterionella bleakeleyi Wm. Smith Asterionella bleakeleyi Wm. Smith, Syn. British Diat., vol. 2, p. 82. 1856. Cells asymmetric to the transverse axis, in life attached by the broader end to 4-16 other cells, forming a stellate colony. Valves of specimens from Lake Michigan 35— 67y long, 4-5y broad at widest extremity. In this taxon the valves taper slightly from the much expanded, often asymmetric, "headpole" to the less expanded "footpole." The width of the midpoint of the valve is always greater than one-half the width of the widest extremity. The margins of the valve are usually slightly convex near middle and are suddenly and sharply constricted just before the capitate "footpole." Striae fine and inconspicuous, without visible substructure, 26-30 in lOu. Axial area narrow, central area lacking. This entity is common in some polluted harbors bordering Lake Michigan. We have not, as yet, found it in appreciable quantities in the plankton of the open lake. It is difficult to distinguish from A. formosa in the living condition, although its broader, blunter valves which are somewhat expanded in the middle allow it to be recognized if populations of the two entities are compared. Cleaned preparations are required for certain identification. 86, ASRIFSKL TCT NC OF STATIONS 1 _1 SS£13 67. „U_,29 6 2 9 ) .... Aster-ionella formosa Hass. Asterionella formosa Hassall, Micr. Exam. Water, p. 10, pi. 2(2), fig. 21 1850. Cells asymmetric to the transverse axis, in life attached by the broader end to 4-16 other cells, forming a stellate colony. Valves of specimens from Lake Michigan 42-120y long, 4-5y broad at the widest extremity. In this taxon the ends of the valve are suddenly and sharply expanded and the body of the valve is very narrow (1.5-2y) with parallel sides in the large individuals and a slight taper towards the smaller end in smaller individuals. The width of the midpoint of the valve is always less then one-half that of the widest extremity. Striae fine and inconspicuous, without visible sub- structure, 24-28 in lOy. The axial area is very narrow and filiform, central area entirely lacking. In specimens from Lake Michigan very small spines often occur on the margins of the valves. 23 This species is abundant in collections from all areas of Lake Michigan. Populations from the open are usually composed mostly of individuals with less robust structure and apparently lighter silicif ication than nearshore populations. Although it is tempting to separate these, our observations indicate that they represent a growth form and cannot be distinguished on the basis of morphology. In areas of the lake that have been eutrophied, both the relative abundance and the seasonal dominance of this species are increased. 84 ASFCRPCS TCI NC OF STATIONS 316 (60973 CH 1876 1.86585 1 (4691C CH 0C1945 2.87499 1 (46921 CH 23N01945 6.01116 1 (46908 r.H TIF1945 7.53773 ) (46917 CH 12JA1946 4.63131 ) (46915 CH 20FE1946 5.54828 ) (46914 CH 19AP1946 2.49858 ) (46924 CH 10KY1946 0.68782 ) (46923 CH 22N01946 3.33741 ) 1.4.692.0 _. _CH__ 2QCE1946 ... 1.98263 ! (46SC5 CH JA1947 0.59811 I (469C9 CH HR1947 2.36783 ) (46912 CH AP1947 9.71599 ) (46916 CH 4KY1947 26.39847 ) (469C6 CH MY1947 16.72278 ) (A691S... CH . . ... .5JN1947 20.36691 ) (46SC7 CH JL1947 18.10959 I 146913 CH 6AU1947 C. 42883 ) (46922 CH 21AU1947 1.57509 ) (46758 EV 5JN1937 6.78981 ) (46771 EV 1UN1937 12.78113 ) (46743 FV 70JN1937 21.1C130 ) (46745 EV 3JL1937 2.92581 ) (46770 EV 9JL1937 1.83683 ) (46764 EV 17JL1937 3.6C999 ] (46757 EV 25JU937 1.34803 ! (46747 EV 1AU19'7 C. 46043 ) —1.4.6263- EJL.. - 23A.U1937 1.78571 ) (46765 EV 30AUL937 0.52426 ) (46769 EV 7SE1937 C. 78774 1 (46752 EV 15SE1937 0.92600 ) (4676C EV 22SE1937 1.10296 I (46750 EV 24SE1937 2.11151 ) . (46.744. ._£Y . ... ... 6DC1937 1.50215 ) (46748 EV 130C1937 3.97096 ) (46767 EV 270C1937 11.04793 ) (46749 EV 12NR1938 13.25403 ) (46768 EV 16MR1938 11.11274 ) (46762 EV 18KR1938 5.33745 ) (46751 FV 30MR1938 7.81599 ) (46772 EV 18AP1938 10.92974 1 (46756 EV 27AP1S38 22.0C244 ) 146759 EV 19PY1938 0.81702 ) (46761 EV 27MY1938 2.74719 ) (46766 EV 14DE1938 19.51837 ) 1 1223.. B 3 18MY1964 C.CC938 ) ( 1224 6 4 18HY1964 0.04313 ) ( 1225 C 6 15MY1964 C. 75657 ) ( 1226 C 7 16MY1964 0.53272 ) ( 1227 C 2 13MY1964 0.01645 ) [ 1228 0 2 14MY1964 C.C6617 ) ( 1229. — . Q 5- 14MY1964 0.54133 ) ( 1230 E 2 16MY1964 0.05334 ) ( 1231 E 3 16KY1964 C. 31553 ) ( 1232 E 5 16MY1964 0.14087 ) ( 1233 B 3 5JN2964 0.11907 ) ( 1234 B 3 18JN1964 C. 14901 ) 1 1?3S r. 7 16JN1964 0.19770 ) t 1439 B 6 5JN1964 2.23776 ) ( 1236 C" 1 8JN1964 C. 13478 ) ( 1237 C 2 8JN1964 0.24233 ) ( 1238 0 3 11JN1964 0.11800 ) 1 1239 0 4 11JN1964 0.01741 ) (—1-240 D 6 — 10JN1964 C. 53688 J ( 1241 E 2 13JM964 0.56924 ) ( 1242 E 3 13JN1964 C.C6894 ) ( 1243 E 6 13JN1964 0.58465 I ( 1244 F 1 11JM964 0.38376 1 ( 1245 F 2 11JN1964 0.06224 ) ( 12.46 .F 1 - UJN1964 0.25100 ) ( 1247 B 3 14JL1964 0.99885 ) ( 1248 B 3 24JL1964 1.37936 ) ( 1440 B 6 11JL1964 3.35335 ! ( 1441 B 6 24JL1964 2.46701 ) ( 1249 C 3 8JL1964 0.34221 ! I 1250 C 6 10.111964 0.57710 ) 1 1251 C 7 16J11964 0.74164 1 i 1252 C 1 16JL1964 C.9C934 ) 1 1253 C* 2 16JL1964 0.53405 ) ( 1254 D 2 15JL1964 1,27370 ) ( 1255 0 5 15JL1964 3.59324 ) ( 1256 E 2 14JL1964 0.83352 ) ( 1257 E 3 14JL1964 C. 72736 ) ( 1258 F 1 6JL1964 4.79033 ) ( 1259 F 2 6JL1964 4.12122 ) ( 1260 F 3 6JL1964 4.94681 ) ( 1261 8 3 2AU1964 2.C6060 ) ( 1267 B 3 I7AU1964 8.37883 ) ( 1442 B 6 2AU1964 2.62709 ) ( 1443 B 6 16AU1964 C. 69189 ) ( 1263 C 7 15AU1964 0.56045 ) ( 1264 C" 1 10AU1964 1.89218 ) ( 1265 C 2 10AU1964 6.88530 ) 1 1266 D 3 18AU1964 7.36635 ) ( 1267 D 6 18AU1964 6.05274 1 < 1268 E 2 15AU1964 6.51056 ) ( 1269 E 3 15AU1964 4.98821 ) I 127C F 1 10AU1964 15.05786 ) ( 1444 B 6 19SE1964 4.24384 ) ( 1271 C 7 27SE1964 0.91402 ) ( 1272 C 1 10SE1964 9.76891 ) ( 1273 C 2 10SE1964 14.30184 ) ( 1274 D'l 17SE1964 3.61282 ) ( 1275 0 2 17SE1964 13.09593 ) ( 1276 0 3 18SE1964 2.61511 ) ( 1777 D 4 18SE1964 2.16879 ) ( 1278 D 6 18SE1964 1.34517 ) ( 1279 E 1 16SE1964 7.69623 ) ( 1280 E 2 16SE1964 2.38274 ) ( 1281 E 3 16SE1964 2.74693 ) I 1282 E 4 16SE1964 3.87812 ) ( 1783 F 5 16SE1964 2.78901 ) ( 1284 E 6 17SE1964 11.34306 ) ( 1285 F 1 15SE1964 6.52262 ) ( 1286 F 2 15SE1964 3.83100 1 ( 1287 F 3 15SE1964 8.05645 ) ( 1288 B 3 150C1964 11.72320 ) 1 1445 B 6 14CC1964 10.27397 ) ( 1289 C 7 14CC1964 5.84847 ) ( 1290 C 1 160C1964 11.93860 ) ( 1291 C* 2 160C1964 5.13673 I ( 1292 D 1 15CC1964 8.34824 ) ( 1293 0 2 150C1964 1C. 89520 ) ( 1294 D 3 150C1964 7.84521 ) ( 1295 D 4 150C1964 8.74063 ) ( 1296 0 5 140C1964 5.78353 ) ( 1297 0 6 140C1964 5.59765 ) ( 1298 E 1 12CC1964 13.57174 ) ( 1299 E 2 120C 1964 9.C1665 ) 1 1300 F 3 130C1964 9.77269 ) ( 1301 E 4 130C1964 6.49121 1 ( 1302 E 5 130C1964 11.33695 ) ( 1303 E 6 130C1964 9.79514 1 ( 1304 F 1 110C1964 4.32184 ) ( 1305 F 2 110C1964 4.34738 ) ( 1306 F 3 110C1964 3.10438 J ( 1307 B 6 N01964 10.60759 ) ( 1308 C 7 6N01964 6.81286 ) ( 1309 C 1 10N01964 17.44597 ) ( 1210 C" 2 10N01964 18.09523 ) ( 1311 D 1 8N01964 16.79478 ) ( 1317 D 7 8NQ1964 17.38319 ) ( 1313 C 3 9N01964 10.54054 ) ( 1314 D 4 9U01964 8.84219 ) ( 1315 D 5 -9N01964 6.05095 ) ( 1316 C 6 9N01964 8.46177 ) ( 1317 E 1 6N01964 14.6C902 ) ( 1318 E 2 7N01964 12.25196 ) ( 1319 E 3 7N01964 13.74597 ) ( 1320 E 4 7N01964 16.50464 ) ( 1321 E 5 7N01564 16.98270 ) ( 1322 E 6 7N01964 13.53018 ) ( 1323 F 1 6N01964 11.12195 ) ( 1324 F 2 6N01964 8.31528 ) ( 1325 F 3 6K.01964 2.46858 1 ( 1336 C 3 27JA1967 1.48268 ) ( 1337 C 3 2MR1967 7.51040 1 ( 1338 C 3 28MR1967 5.73862 ) I 1339 C 5 28MR1967 C. 37102 ) ( 1340 C 7 28MR1967 11.3C026 ) ( 1341 A 3 19AP1967 1.74653 ) ( 1342 A 4 19AP1967 2.27383 ) ( 1343 A 6 19AP1967 2.67474 ) ( 1344 C 3 25AP1967 2.20035 ) ( 1345 C 5 25AP1967 2.18311 ) I 1346 r. 7 21AP1967 2.33667 ) 1 1347 E 2 23AP1967 2.39005 ) ( 1348 E 5 23AP1967 1.43934 ) ( 1368 A 3 4MY1967 0.04713 ) ( 1369 A 4 4KY1967 0.02982 ) 1 1370 A 6 3MY1967 C. 16112 ) ( 1371 C 3 4HY1967 0.0C693 ) ( 1372 C 5 5MY1967 C. 00709 ) ( 1373 C 7 5MY1967 C.C1426 ) ( 1374 E 2 7KY1967 1.25523 1 ( 1375 E 3 7MY1967 0.03609 ) 1 1376 E 5 6HY1967 C. 12930 ) ( 1408 A 3 23HY1967 0.37115 1 ( 14C9 A 4 23MY1967 1.14563 ) 1 1410 A 6 24MY1967 C. 11840 1 ( 1411 C 3 31KY1967 0.41850 ) ( 1412 C 5 31KY1967 1.62051 ) ( 1413 C 7 25MY1967 C.C4422 ) ( 1414 F 7 78MY1967 0.76574 ) ( 1415 E 3 28KY1967 0.31479 ) ( 1416 E 5 28HY1967 C. 38269 ) ( 1431 A 3 12JN1967 1.98265 ) ( 1432 A 4 13JN1967 C. 98345 1 ( 1433 C 3 17JN1967 4.52138 ) 1 1434 C 5 17JN1967 0.57722 ) ( 1435 C 7 13JN1967 0.19891 ) ( 1436 E 2 15JN1967 C. 43060 ) ( 1437 E 3 15JN1967 0.62983 ) ( 1438 E 5 14JN1967 0.40668 1 ( 1446 A 3 11JL1967 6.84898 ) ( 1447 A 4 11JL1967 18.33832 ) ( 1448 A 6 10JL1967 0.59416 ) ( 1449 C 3 16JL1967 5.61733 ) ( 1450 C 5 16JL1967 8.39760 ) ( 1451 C 7 16JL1967 5.37380 ) ( 1452 E 2 14JL1967 12.51756 ) ( 1453 F 3 15JL1967 4.77719 ) ( 1454 E 5 15JL1967 21.00420 ) 1 1504 A 3 2eAU1967 1.72818 ) ( 1505 A 4 28AU1967 24.88921 ) ( 15C6 A 6 29AU1967 5.49249 ) { 1506 C 3 2SE1967 19.58276 ) I 15Q9 r 5 7SF1967 19.43C6? ) ( 1510 C 7 29AU1967 13.27853 ) ( 1511 E 2 1SE1967 32.01645 ) ( 1512 E 3 1SE1967 10.44448 1 ( 1513 E 5 31AU1967 4.25661 ) ( 1532 A 3 18SE1967 4.82901 ) ( 1533 A 4 19SE1967 12.02302 ! ( 1534 A 6 19SE1967 7.16657 ) ( 1535 C 7 20SE1967 3.37979 1 ( 1536 E 2 24SE1967 19.08708 ) ( 1537 E 3 24SE1967 6.C3813 ) ( 1538 E 5 23SE1967 2.28675 ) ( 1539 C 3 4CC1967 16.55429 ) ( 1540 C 5 4CC1967 5.55914 1 I 1541 E 2 110C1967 1C. 43052 ) ( 1542 E 3 110C1967 13.17128 ) ( 1543 E 5 10OC1967 7.03922 ) ( 1377 C-S 1 9MY1967 C.0C396 ) ( 137ft OS 7 9MY1967 0.03364 ) ( 1379 GS 3 9MY1967 0.01547 ) ( 1380 GS 4 9MY1967 C. 15806 ) ( 1=>81 GS 5 10HY1967 0.19797 1 I 1382 GS 6 10KY1967 0.00278 I ( 1383 GS 1 10MY1967 C.C8287 ) 1 13B4 C-*. ft 10MY1967 0.02588 ) ( 1385 GS 9 10MY1967 0.C4709 ) ( 1386 GS10 12HY1967 C. 16087 ) ( 1387 GS11 12XY1967 C. 11090 ) ( 1390 GS14 12KY1967 0.01762 ) 1 1391 GS15 12HY1967 C. 06225 ) ( 1397 GS16 17MY1967 0.04315 ) ( 1393 GS17 13NY1967 0.25751 ) I 1394 GS18 13MY1967 C. 84288 ) I 1395 GS19 13MY1967 0.45212 ) ( 1396 GS20 13HY1967 0.05771 I ( 1397 C-S21 13MY1967 C. 91567 1 1 139ft GS?? 14MY1967 0.13662 ) ( 1554 GS 1 30C1967 8.46794 1 ( 1555 GS 2 3CC1567 8.15678 ) ( 1556 GS 3 30C1967 7.66543 ) ( 1557 GS 4 30C1567 6.53961 ) ( 1558 GS 5 40C1967 E.6C155 ) ( 1550 J-,9 7 4fir,1967 6.12016 ) ( 1560 GS 8 40C1967 6.28158 ) ( 1561 OS 9 4CC1967 4.51957 ) { 1562 GS10 5CC1967 12.6C670 ) ( 1563 GS11 5CC1967 6.71094 ) ( 1564 GS12 50C1967 4.95424 ) 24 1566 GS 1 4 5f]C196 7 3.2104? ) 1567 GS15 50C1967 1.22253 ) ( 1568 i X57L_ 1 1574 GS16 50C1967 15.55533 ) 2.41765 ) 1569 1572 GS17 GS2C 5QC1967 60C1967 3.53782 ) 2.39743 ) 1570 1573 GS18 GS21 50C1967 60C1967 3.81793 ) 8.7C169 ) GS22 60C1967 2001^67 10.47000 ) 1.C7784 ) 1575 1524 GS28 HI 1 60C1967 20SE1967 3.97378 ) 0.10946 ) 1544 1546 ru l LU 1 2CC1967 20C1967 19SE1967 20SE1967 1.86813 ) C. 31511 ) ( 1520 ( 1525 hO I PW 1 18SE1967 20SE1967 0.43849 ) 3.11934 1 1521 1526 SH MC 1 1 18SE1967 20SE1967 1.93861 ) 4.64243 ) 1523 1527 RA 1 TR 1 5.31365 ) 1.1C692 ) ( 1528 SB 1 20SE1967 25SE1967 4.85128 ) 0.02536 ) 1529 1545 Kk 1 1 20SE1967 20C1967 6.52356 ) 0.56761 ) 1530 1548 FR 1 CA 1 24SE1967 3CC1967 60C1967 29MY1S67 29MY1967 19AP1967 1.28482 ) ( 1549 MO 1 MR 1 40C1967 5QC1967 14.25243 ) 9.91203 ) 1551 15 53 ES SG 1 1 50C1967 60C1967 21AP1967 22MY1967 24.15527 ) 35.37015 ) 13.15749 ) 0.01555 ) 1552 1428 1427 1350 SM 1 HI 2 1U 2 EH 2 32.32750 ) 1.C6059 ) { 1426 CS 2 29MY1967 22MY1967 4.19947 ) 2.39270 I 1351 1418 MI SH 2 2 C. 69007 ) C. 59911 ) ( 1425 .. _(__140J2_... { 1353 _ ( 1403 ( 1407 ( 1419 ( 1422 ( 1430 RA 2 TR 2 FR 2 _CA 2 SM 2 BU 2 GA 2 MC 2 25MY1967 6MY1967 23AP1967 10MY1967 14CY1967 23MY1967 23KY1967 12JM967 0.02652 ) 0.45484 ) 2.36287 } 0.26769 ) 1399 1400 1354 14C4 Ph se GH MO CI IH 2 2 2 2 2 2 5CY1967 6MY1967 25AP1967 10MY1967 19AP1967 23MY1967 1.41458 ) 2.09674 I 2.95504 ) 0.19055 ) 1401 1352 1429 1405 14C6 1421 PO 2 KW 2 hL 2 ES 2 GB 2 CH 2 6MY1967 21AP1967 29MY1967 12MY1967 13MY1967 23MY1967 C. 49389 ) 15.52998 ) 1.69869 ) 1.34159 ) 2.77065 1 0.4C278 ) 1349 1420 4.65551 ) 0.13595 ) C. 43132 ) C. 10409 ) 0.04087 ) 0.C4935 ) 1423 WA 2 25MY1967 C. 14987 ) 1424 KN 2 25MY1967 C. 29310 ) Asterionella gvacillima (Hantz.) Heib. Diatoma graeillimum Hantzsch in: Rabenhorst, Alg. Sachens resp. Mittel- europas, No. 1104. 1861. Asterionella graoillima (Hantz.) Heiberg, Consp. Crit. Diat. Danicarum, p. 68, pi. 6, fig. 19. 1863. Cells nearly symmetric, in life attached at one end to form stellate colonies of 4-16 cells. Valves of specimens from Lake Michigan 35-60y long, 3— 4u broad at the widest extremity. In this taxon the valves are sub- linear with capitate ends of nearly equal size. Striae fine and inconspicu- ous, 24-28 in lOu, without visible substructure. Axial area very narrow and filiform, central area entirely lacking. Specimens from Lake Michigan often have very delicate spines on the margins of the valves. Numerous authors have commented on the difficulty of establishing the identity and range of morphologic variation in this taxon. Contrary to some previous reports we have found it to be relatively rare in Lake Michi- gan. It is tempting to treat it as a growth form or variety of A. formosa3 but our observations lead us to believe that the two taxa are distinct. 85 ASFCRMVG TCT NO OF STATIONS 19 (46917 CH 12JA1946 0.25229 ) (46515 (46916 (46749 ( 1225 ( 1343 Ch CH EV 20FE1946 4MY1947 12MR1938 15MY1964 19AP1S67 C. 01138 ) 1.43350 ) C. 03641 ) 0.00392 ) 0.01251 ) (46914 (46919 (46751 ( 1341 ( 1344 Ch CH EV A 3 C 3 19AP1946 5JN1947 30MR1938 19AP1967 25AP1967 0.0C427 ) (46924 CH 10MY1946 0.0C353 ) (46743 EJL 20JN1937 0.0C42E ) C. 74050 ) C. 01117 ) (46756 EV 27AP1938 0.00336 ) ( 134? A 4 19AP1967 0.0306S ) C 6 A 6 C. 11716 ) C.0C496 ) ( 1372 ( \322__ C 5 BH 1 5MY1967 18SE1967 0.00355 ) 0.26258 1 _ < 1453 [ Genus Bacillaria Gmel. Gmelin in: Linneaeus, Syst. Nat., ed. 13, Vol. 1, Part 6, p. 3903. 1788. The only commonly recognized member of this genus occurs in periphyton communities and occasionally in the plankton of brackish and nearshore marine habitats. It is also found in saline springs and lakes and other waters con- taining high levels of total dissolved solids in inland regions. The few specimens noted in our collections were undoubtedly derived from such habi- tats. 25 Baoillaria paxillifer (0. F. Mlill.) Hendy Vibrio paxillifer 0. F. Muller. Animal. Infus., p. 54. 1786. Bacillaria paxillifer (0. F. Mull.) Hendy, Fish. Invest. (London), Ser. 4, Part 5, p. 274, pi. 21, fig. 5. Coll: 1366. 1964. Genus Caloneis Cleve Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 26(2) :46. 1894. Members of the genus Caloneis find their primary habitats in periphyton or epipelic communities. The occasional representatives of the genus taken in plankton collections from Lake Michigan are undoubtedly derived from such habitats. Caloneis alpestris (Grun.) Cleve Navioula alpestris Grunow, Verh. Zool.-Bot. Ges. Wien, 10:545, pi. 5, fig. 4. 1860. Caloneis alpestris (Grun.) Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 26(2) :53. 1894. -8J CAAIPFST TCT Nfl OF STATICNS _ 12JA.1_946_ 6GC1967 _0._0£C28. I 0.00660 I 28AU1967 0.00247 ) Caloneis amphisbaena (Bory) Cleve Navioula amphisbaena Bory, Encyclop. Method., p. 565. 1824. Caloneis amphisbaena (Bory) Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 26(2):58. 1894. CAAPPHIS TCT NC CF STATIONS 3 20 hO 1 18SE1T6T" 0.CC471 ) 22MY1967 0.00374 I C.CC22C ) Caloneis baoillaris var. thermalis (Grun.) A. Cleve Navioula baoillaris var. thermalis Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 12, fig. 27. 1880. Caloneis baoillaris var. thermalis (Grun.) A. Cleve, Bih. K. Svenska Vet.- Akad. Handl., 21, Afd. 3(2): 16. 1895. 91 CABACIVT TCT NC DF STATICNS 8 (46919 CH 5JN1947 0.00152 1 (46758 EV 5JN1937 0.00357 ) (46764 EV 17JL1937 C. 03223 ) (46757 ( 1567 EV GS15 25JL1937 50C1967 0.00481 I 0.0C159 I (46747 ( 1574 EV GS22 1AU1937 60C1S67 0.00248 ) 0.00288 ) (46760 ( EV 22SE1S37 C.0C492 ) Caloneis baoillum (Grun.) Cleve Stauroneis baoillum Grunow, Verh. Zool.-Bot. Ges. Wien, 13:155, pi. 4, figs. 16a-b. 1863. Caloneis baoillum (Grunow) Cleve, Diatomiste, 2(17) :99. 1894. 89 CABACILL TCT NO OF STATIONS 17 (46921 146747 CH EV 23N01S45 1AU1937 0.00065 ) 0.0C495 ) (46920 (46768 CH EV 20DE1946 16MR1938 0.00031 ) 0.01470 I (46916 ( 1245 CH F 2 4MY1947 11JN1964 C.0C068 ) C.CC346 ) ( 1258 ( 1104 F 1 F 1 6JL1964 11 fir. 1964 0.00236 ) 0.00747 1 { 1284 ( 1389 E 6 GS13 17SE1964 12XY1967 0.00318 ) C. 00258 ) ( 1285 ( 1565 F 1 GS13 15SE1964 50C1961 C. 01165 I C.C3042 ) [ 1567 ( 1550 GS15 MR 1 50C1967 5QC1967 0.00159 ) 0.01239 ) ( 1574 ( 1350 GS22 BH 2 60C1967 19AP1967 0.01438 1 0.00441 ) ( 1546 ( LU 1 20C1967 C. 00500 ) 26 Caloneis baeillum var. lancettula (Schulz) Hust. Colonels baeillum var. lancettula (Schulz) Hustedt in: Pascher, Sussw.- Fl. Mitteleuronas. Heft 10, Aufl. 2, p. 236, fig. 361. 1930. _9J2 CABACIVL TCT NO CF STATIONS (46764 EV 17JL1937 0.00806 ) (46747 EV 1AU1937 0.00248 ) (46763 EV 23AU1937 C. 08117 ) (46768 I 1306 EV F 3 16MR1938 11CC1964 0.02940 ) 0.00277 ) 1 1272 ( 1387 C" 1 GSU 10SE1964 12MY1967 0.00410 ) 0.00396 ) ( 1285 ( 1388 F 1 CS12 15SE1964 12HV1967 C.C0582 ) C. 01207 ) ( 1546 < 1530 LU 1 FR 1 20C1967 24SE1S67 0.00500 1 0.C200C I ( 1526 ( MO 1 20SE1967 0.00569 ) ( 1529 KM 1 20SE1967 C. 04797 ) Caloneis olevei (Lagerst.) Cleve Navioula olevei, Lagerstedt, Bih. K. Svenska Vet.-Akad. Handl., 1:34, pl„ 1, fig. 10. 1873. Caloneis olevei (Lagerst.) Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 26(2);51. 1894. 92 CAClEVEI TCT NO OF STATIONS _50C 1 96 7 0.OC165 ) Caloneis lewisii Patr. Caloneis lewisii Patrick, Farlowia, 2(2):172. 1945. _9J CALEWISl TOT NO OF STATICNS X 60 97 3 . CH 1676 0.02362 ) ( 1565 GS13 5CC1967 0.00507 _) (_ Caloneis limosa (Kutz.) Patr. Navieula limosa Kutzing, Bacill. , p. 101, pi. 3, fig. 50. 1844. Caloneis limosa (Kutz.) Patrick in: Patrick and Reimer, Acad. Nat. Sci. Philadelphia Monogr., 13:587, pi. 54, fig. 10. 1966. 94 CALIfOSA TOT NG OF STATICNS 1 ._1_-3_5Jl1 LU 1FEJL8A1 0_.JLC57.8_..! (__ Caloneis ventvioosa (Ehr.) Meist. Navioula ventvioosa Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1838:130, pi. 4, fig. lOi. 1839. Caloneis ventvioosa (Ehr.) Meister, Beitr. Kryptog.-Fl. Schweiz, 4(1)116, pl. 17, fig. 4. 1912. Coll: 1157 Caloneis ventvioosa var. minuta (Grun.) Patr. Navioula ventvioosa var. minuta Grunow in: Van Heurck, Syn. Diat. Belgique, p. 103. 1885. Caloneis ventvioosa var. minuta (Grun.) Patrick and Reimer, Acad. Nat. Sci. Philadelphia Monogr., 13:584, pl. 54, fig. 2. 1966. 9J r.AVFNTVM TOT NC CF STATIONS 1 _152J S±L_I : LaS£1967 C.0C577 ) ( Caloneis ventvioosa var. tvunoatula (Grun.) Meist. Navioula ventvioosa var. tvunoatula Grunow in: Van Heurck, Syn. Diat. Belgique, pl. 12, fig. 25. 1880. Caloneis ventvioosa var. tvunoatula (Grun.) Meister, Beitr. Kryptog.-Fl. Schweiz, 4(1):116, pl. 17, fig. 5. 1912. 27 96 CAVFKTVT TnT NO OF STATIONS ( 3540 CH 11MY1879 0.00932 ) ( 3541 CK 1FE1881 0.01956 1 (46921 CH 23N01S45 C.0C129 ) (46923 I469_lii_ CH 22N01946 4MY1947 0.00437 ) 0.00102 ) (46920 146907 CH CH 20DE1946 JL1547 0.00031 ) C. 00049 ) (46905 (46922 CH CH JA1947 21AU1947 C. 00123 ) C.0C194 1 146758 (46770 EV FV 5JM937 9JL1937 0.03209 ) 0.01789 1 146771 (46764 EV EV 1UN1937 17JL1937 0.00238 ) 0.04835 ) 146743 (46757 EV EV 20JN1937 25JL1937 C. 02141 ) 0.02407 ) 146747 (46760 EV EV 1AU1937 22SE1937 0.01485 ) 0.0C492 ) (46763 (46750 EV EV 23AU1937 24SE1937 C. 06088 ) 0.00471 ) 146752 146748 EV EV F 1 GS13 15SE1937 130C1937 10AU1964 50C1967 C.C4354 ) C. 02135 1 146767 1 1388 EV GS12 270C1937 12MY1967 0.00387 ) 0.0C603 ) (46749 [ 1392 EV GS16 12KR1936 12KY1967 0.01214 1 0.00308 1 1 1270 ( 1565 C. 00272 ) 0.01521 ) 1 1566 GS14 50C1967 0.00183 ) ( 1574 GS22 60C1967 C. 00575 ) 1 1545 ViL 1 2CC1967 C.0C676 ) Caloneis sp. #2. Species inoertae sedis 97 CASPECCB TCT NO OF STATIONS (46919 CH 5JN1947 0.00152 Caloneis sp. #3. 98 CASPECOC TCT NO OF STATIONS 10 (4691C 146770 CH EV 0C1945 9JL1937 0.00109 ) 0.0C596 ) (46758 (46764 EV EV 5JN1937 17JL1937 C.C1070 1 C. 10475 ) (46771 (46757 EV EV 1UM937 25JL1937 C.CC238 ) C.C3370 ) (46747 ( 1388 EV GS12 1AU1937 12MY1967 0.01733 ) 0.01207 ) (46765 ( EV 30AU1937 C.0C558 1 146752 EV 15SE1937 C.C4354 ) Genus Campy lodisous Ehr. Ehrenberg, Ber. Akad. Wiss. Berlin, 1840:207. 1841. The single species of Campy lodisous that occurs in our collections reaches its maximum abundance in epipelic communities in hardwater lakes. In such localities it is occasionally noted in the plankton and is apparent- ly a successful facultative planktont. Campylodisous norious var. hibevnioa (Ehr.) Grun. Campylodiseus hibevnicus Ehrenberg, Ber. Akad. Wiss. Berlin, 1845:154. 1845. Campylodisous novious var. hibevnioa (Ehr.) Grunow, Verh. Zool.-Bot. Ges. Wien, 12:439. 1862. 99 CPNORIVH TCT NO CF STATIONS 0.02362 ) _( Genus Capartogramma Kuff. Kufferath, Expl. Hydrobiol. Lake Tanganyika (1946-1947) Res. Sci. 4(3):27. 1956. Only a single species of Capavtogvamma occurs in our collections. Pre- vious reports of its distribution indicate that it reaches its maximum abundance in brackish water habitats although it is also found in. limited abundance in strictly fresh water. In Lake Michigan its distribution appears to be restricted to shallow, eutrophied bays where it probably grows in epipelic or periphyton communities. 28 Capartogramma oruoioula (Grun. ex Cleve) Ross Sohizostauron oruoioula Grunow ex Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 18(5) :16, pi. 3, fig. 44. 1881. Capartogramma oruoioula (Grun. ex Cleve) Ross, Bull. British Mus. (Nat. His.), 3(2) :59, figs. 8-11. 1963. 100 CPSPFCOA TCT NO OF STATIONS LJ39.5 G_S.1£_ 13MY1967 0_,_Q0JJL7_J (_1571 G.S19.. C. 03717 ) Genus Cooooneis Ehr. Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1835:173. 1837. Members of the genus Cooooneis are particularly adapted to epiphytic growth on larger algae or on aquatic vascular plants. Plankton collections from Lake Michigan often contain at least a few representatives of the genus. Most of these are probably derived from communities other than the plankton but it appears that at least some of the smaller species are secondarily planktonic in that they attach to larger euplanktonic algae. Cooooneis diminuta Pant. Cooooneis diminuta Pantocsek, Res. Wiss. Erforsch. Balatonsees, Vol. 2. Pt. 2, Sec. 1, p. 67, pi. 7, fig. 181. 1902. 101 CCDIMINU TOT NC CF STATIONS 63 146766 EV 14DE1538 0.01584 ) ( 1244 F 1 11JN1964 0.00110 1 1258 F 1 6JL1964 C.CC236 ) ( 1268 . 1...13J3.0. _ E 2 £ 3 F. 2 fiSlO 15AU1964 13 OCX? 64. 110C1967 12MY1967 0.00274 ) 0.0C358 ) C. 02129 ) 0.0C287 ) ( 1270 ( 1431 ( 1542 ( 1387 F 1 A 3 E 3 GSU 10AU1964 12JN1967 0.00272 ) 0.00257 ) 1279 1537 E 1 E 3 16SE1964 24SE1967 C.0C393 ) C.0C431 1 1 1541 ( 1386 110C1967 12HY1967 0.01526 1 C. 01188 ) 1383 1388 GS 7 GS12 10MY1967 12MY1967 C.CC267 ) C.0C603 ) ( 1391 ( IW4 GS15 GS18 12MY1967 . 13MY1S6JL 0.00479 I 0.00516 ) 0.00304 ) 0.00374 ) 1 1392 . S .. 1.3.95... GS16 ..GS.1.9 12MY1967 13MY1967 0.01233 ) C. 00117 ) 1393 1396 GSU GS20 13MY1967 13MY1967 C.0C548 ) C. 00074 ) 1 1398 L 1552. GS22 GS 4 14MY1967 30C1967 ( 1554 I 1558 GS 1 GS 5 GS 9 GS15 30C1967 40C1967 C. 01067 ) 0.00793 ) 1556 1559 GS 3 GS 7 30C1967 40C1S6 7 C.C1564 ) C.0C699 ) ( 1560 1 1566 GS 8 GSI4 40C1967 50C1967 0.00472 I 0.00183 1 ( 1561 ( 1567 40C1967 50C1967 0.00587 ) 0.00318 1 1565 1571 GS13 GS19 50C1967 60C1967 C. 24845 ) 0.00234 ) ( 1572 . XJ.5JA GS2G GS28 6CC196 7 60C1967 0.0C18C ) 0.00129 ) < 1573 ( 1544 ( 1522 ( 1526 ( 1530 ( 1549 GS21 MU 1 60C1967 20C1967 0.00112 ) 0.00238 ) 1574 1547 GS22 MS 1 60C1967 20C1967 C. 02013 ) C. 00798 ) I 1546 1 1525 LU 1 PW 1 Kl< 1 r.a i 2CC1967 2QSi.196.jL 2CSE1967 3CC1967 0.03001 1 .0.04178 ) 6.03598 ) 0.01272 ) BH 1 M0 1 f« 1 MC 1 18SE1967 20SE1967 0.00182 ) 0.00569 ) 1523 1527 RA 1 TR 1 19SE1967 20SE1967 C.0C923 ) C. 02516 ) i 1529 ( 1548 24SE1967 4CC1967 C. 06001 ) 0.02741 ) 1545 1551 hL 1 ES 1 20C1967 50C1967 C. 08109 ) C. 02396 ) < 1550 ( 1427 MR 1 . LU 2 HO 2 M0 2 50C1967 29MY1967 6MY1967 1CMY1967 1.84612 1 0.07264 1 0.00588 ) 0.02541 ) ( 1553 ( 1417 ( 1354 ( 14C5 SG 1 HC 2 6CC1967 22MY1967 C. 03672 ) 0.00748 I 1426 1350 fS 2 BH 2 29MY1967 19AP1967 C.1E898 ) C. 04185 ) ( 1401 .. I 14Q.4. GH 2 ES 2 25AP1967 12MY1967 0.00690 1 0.01290 ) 1429 1407 hL 2 SM 2 29MY1967 14MY1967 C. 01062 ) C. 01791 ) Cooooneis disoulus (Schum. ) Cleve ii Navioula disoulus Schumann, Schrift. Phys.-Okon. Ges. Konigsburg, 5:21, pi. 2, fig. 23. 1864. Qooooneis disoulus (Schum.) Cleve in: Cleve and Jentzsch, Schrift. Phys.- Okon. Ges. Konigsburg, 22:129. 1882. 10.2 f.CniSCUL TCT NO OF STATIONS 1 6Q9J3_ CH 1876 0.02362 ) ( 3541 CH 1FE1881 0.00978 ) ( 1279 E 1 16SE1964 C.CC393 ) I 1541 1 1554 E 2 GS 1 110C1967 30C196 7 0.00532 ) C.0C356 1 1 1394 1 1557 GS18 GS 4 13MY1967 30C1967 0.00172 ) 0.00374 ) ( 1396 1 1559 GS20 GS 7 13MY1967 40C1967 0. 00074 ) C.CC350 V ( 1561 1 1574 GS 9 GS22 40C1967 60C1S67 0.00587 ) 0.00288 ) ( 1567 ( 1545 GS15 HL 1 50C1967 20C1967 0.00159 1 0.01351 1 ( 1573 1 1550 GS21 MR 1 60C1967 50C1967 0.00112 ) C.C2476 ) I 1553 SG 1 60C1967 0.00734 I ( 1426 MS 2 29MY1967 0.031S0 1 ( 1354 GH 2 25AP1967 C. 00173 ) Cooooneis pedioulus Ehr. Cooooneis pedioulus Ehrenberg, Infusionsthierchen, p. 194, pi. 21, fig. 11. 1838. 29 103 COPECICU TOT NO OF STATIONS 100 ( 3540 (46914 CH 11MY1879 19AP1946 0.03261 ) 0.00107 ) 35C7 46923 CH CH 19FE1881 22N01946 0.01132 I 0.00656 ) 46917 46920 CH CH 12JA1946 200E1946 C.C0083 ) C.CC062 ) (46S16 (46922 CH CH 4MY1947 21AU1947 0.00068 1 0.00194 ) 46919 46758 CH EV 5JN1947 5JN1937 0. 00303 I 0.0214O ) 46907 46770 CH EV JL1947 9JL1937 C.0CC99 I C.CC596 ) (46764 (46763 EV EV 17JL1937 23AU1937 0.02417 ) 3.77435 ) 46757 46765 EV EV 25JL1937 30AU1937 0.02407 ) 0.02231 ) 46747 46752 EV EV 1AU1937 15SE1937 C. 17328 ) 4.C4876 ) (46760 (46748 EV EV 22SE1937 130C1937 0.07878 ) 0.74722 ) 46750 46767 EV EV 24SE1937 270C1937 0.07070 ) 0.03095 ) 46744 46749 EV EV 60C1937 12MR193E C.C3414 ) C.C9710 ) (46768 (46766 EV EV 16MR1938 14DE1938 0.1C290 1 0.03169 ) 46762 1272 EV C 1 18MR1938 10SE1964 3.52889 ) C. 00410 ) 46751 1278 EV D 6 30MR1938 18SE1964 0.05583 ) C.CC384 ) ( 1279 E 1 D 6 A 6 ~~ E 5 GS21 16SE1964 9N01964 19SE1967 23SE1967 100C1967 l'3MY1967 0.00393 ) C.0C378 ) 0.00310 ) 1.41413 ) 0.00718 ) 0.00131 ) 1284 1452 E 6 E 2 17SE1964 14JL1967 0. 00318 ) 0.C0213 ) 1300 1533 E A 3 4 130C1964 19SE1967 0.C0358 ) C.CC464 ) ( 1534 ( 1538 1536 1540 E 2 C 5 24SE1967 40C1967 0.02999 ) C. 00496 1 1537 1542 E E 3 3 24SE1967 110C1967 13MY1967 30C1967 C.C1725 ) C.01526 ) ( 1543 ( 1397 1388 1398 GS12 GS22 12KY1967 14MY1967 0.00603 ) 0.00304 ) 1395 1557 GS19 GS 4 C.0C117 ) C.CC747 ) ( 1559 ( 1564 GS 7 GS12 40C1967 50C1967 0.00699 ) C. 00165 ) 1561 1565 GS 9 GS13 40C1967 5CC1967 0.01174 ) 0.01014 ) 1563 1566 C-S 11 GS14 50C1967 50C1967 50Ci967 60C1967 60C1967 20C1967 C.0C935 ) C.CC550 ) ( 1567 (1570 GS15 GS18 50C1967 50C1967 0.06668 ) 0.02975 ) 0.01232 ) 0.01597 ) 1568 1571 GS16 GS19 50C1967 6CC1967 0.00433 I 0. 00585 ) 1569 1572 GS17 GS20 GS28 LU 1 C.CE351 ) C.O018O ) ( 1573 ( 1547 GS21 MS 1 6CC1967 20C1S67 1574 1524 GS22 MI 1 60C1967 20SE1967 0.68745 ) 0.13135 ) 1575 1546 C.C0387 1 C. 10504 ) ( 1520 — ..< 1523_ HO RA TR .. £R CA SG 1 1 1 JL 1 1 18SE1967 19SE1967 20SE1967 24SE1967 30C1967 60C1967 0.05658 ) 0.C36SC ) 1521 1525 SH 1 PW 1 18SE1967 20SE1967 0. 04616 ) 0.38992 1 1522 1526 EH CO 1 1 16SE1967 20SE1967 C.CC182 ) 2.73084 ) ( 1527 _(__J3_30 4.12579 ) 0.38004 ) 0.26714 ) 0.00734 ) 1528 1531 1 552 1426 SB 1 GH 1 SM 1 MS 2 20SE1967 25SE1967 0.69304 I 0.00845 ) 15 29 1545 KW 1 1 2CSE1967 20C1967 6.52356 ) 1.62173 ) ( 1548 ( 1553 60C1967 29MY1967 0. 03301 1 C. 01050 ) 1550 1351 PR M 1 2 50C1967 21AP1967 C. 23541 1 C.OC310 ) ( 1427 1 .L40_l_ LU MO 2 2 29MY1967 6MY1967 0.02421 ) 0.14699 ) 1417 1402 HO 2 TR 2 22MY1967 6MY1967 0.00374 1 C. 05956 ) 1350 1400 BH SB 2 2 19AP1967 6MY1967 C.C7C48 ) C. 02383 ) ( 1353 ( 1404 FR MO 2 2 23AP1967 1CHY1967 0.01055 1 0.01270 ) 1354 1407 GH 2 SM 2 25AP1967 14KY1967 0.00345 1 0.00597 ) 1429 1349 CI 2 2 29KY1967 19AP1967 C. 01062 ) C. 01078 ) ( 1406 ( 1423 GB WA 2 2 13^Y1967 25KY1967 0.01617 ) 0.00428 ) 1419 BU 2 23MY1967 0.01831 ) 1420 IH 2 23MY1967 C. 01511 1 Cooooneis plaoentula Ehr. Cooooneis plaoentula Ehrenberg, Infusionsthierchen, p. 194. 1838. 104 CdPl.ACEN TOT KC OF STATIONS (46751 EV 30MR1938 0.02233 ) 1244 F 1 11JN1964 C. 00110 I 1278 0 6 18SE1964 C. 00384 ) I 1304 _L_L5J7_ F 1 E 3 110C1964 24SE1967 0.00247 ) 0.00863 1 1324 1538 F 2 E 5 6N01964 23SE1967 0.00233 ) 0.00552 1 1504 1539 A 3 C 3 28AU1967 40C1967 C. 00247 1 C.CC503 ) ( 1540 C 5 GS 2 40C1967 30C1967 0.01985 1 0.01059 ) 1541 1559 E 2 GS 7 110C1967 40C1967 0.00532 ) 0.00350 ) 1542 1562 E 3 GS1C 110C1967 50C1967 C.01526 ) C.0C247 ) ( 1567 ( 1574 GS15 GS22 5CC1967 60C1967 0.00635 ) 0.01151 1 1569 1544 GS17 MU 1 50C1967 20C1967 0.00149 ) 0.00715 ) 1572 1522 GS20 BH 1 60C1967 18SE1967 C. 00090 ) C. 00182 ) ( 1531 1 1350 GH 1 RH ? 25SE1967 19AP1967 0.00845 ) 0.01322 ) 1545 1404 WL 1 MC 2 20C1967 10MY1967 C. 02027 ) 0.01270 ) 1428 1407 MU 2 SM 2 29MY1967 14MY1967 C. 00904 J C. 00597 ) Cooooneis plaoentula var. euglypta (Ehr.) Cleve Cooooneis euglypta Ehrenberg, Mikrogeol., pi. 34(6A), fig. 2. 1854. Cooooneis plaoentula var. euglypta (Ehr.) Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 27(3): 170. 1896. 105 r.npi acvf tct ke tf staticns 121 (60973 CH 1876 0.02362 I 3541 CH 1FE1881 0.01956 ) 46910 CH 0C1945 C. 00109 ) (46921 (46907 CH CH 23N01945 JL1947 0.00065 1 C. 00099 ) 46917 46922 CH CH 12JA1946 21AU1947 0.00028 ) 0.00048 ) 46923 46743 CH EV 22N01946 20JN1931 0.00656 ) C.0C428 ) (46747 (46768 EV EV 1AU1937 16MR1938 0.00248 ) 0.01470 1 46752 46766 EV EV 15SE1937 14DE1938 0.04354 I 0.01584 ) 46760 1229 EV 0 5 22SE1937 14MY1564 0.00492 ) C.CC423 I ( 1236 ( 1244 C F 1 1 8JN1964 11JN1964 0.00175 I 0.00219 ) 1240 1245 D F 6 2 10JN1964 11JN1964 0.00153 ) 0.00346 ) 1243 1258 E F 6 1 13JN1964 6JL1964 0. 00209 ) C. 01416 ) { 1259 ( 1267 F 0 2 6 6JL1964 18AU1964 0.01239 ) 0.00216 I 1260 1268 F E 3 2 6JL1964 15AU1964 0.00191 ) C. 01094 ) 1264 1270 C F 1 1 10AU1964 10AU1964 C. 00579 ) C. 01089 ) ( 1279 ( 1285 E F 1 1 16SE1964 15SE1964 0.01178 1 0.11648 1 1280 1286 E F 2 2 16SE1964 15SE1964 0.00681 ) 0.01095 1 1284 1287 E F 6 3 17SE1S64 15SE1964 0.01271 1 0.00500 ) ( 1289 ( 1299 C E 7 2 140C1964 120C1964 0.00440 1 0.00314 ) 1291 1302 C E 2 5 160C1964 130C1964 0.00245 ) 0.00405 ) 1297 1303 0 E 6 6 140C1964 130C1964 C. 00190 ) C.CC560 ) ( 1304 ( 1341 F A 1 3 110C1964 19AP1967 0.00247 ) 0.C141C 1 1305 1370 F A 2 6 110C1964 3MY1967 0.00173 ) 0.C0230 ) 1306 1373 F C 3 7 110C1964 5MY1967 C.C0277 ) 0.00285 ) ( 1374 ( 1448 E A 2 6 7MY1967 10JL1967 0.00299 1 0.0C354 I 1416 1511 E E 5 2 28MY1967 ISE1967 C.01C93 ) 0.00614 ) 1446 1533 A A 3 4 11JL1967 19SE1967 C.0C245 ) C.0C464 I ( 1536 ( 1542 E E 2 3 24SE1967 110C1967 0.00545 1 0.07628 1 1538 1543 E E 5 5 23SE1967 10CC1967 C. 01657 1 0.01437 ) 1540 1377 C GS 5 1 4CC1967 9MY1967 C.0C496 ) C.0C396 ) ( 1380 ( 1386 GS 4 GS'lO 9MY1967 12MY1967 0.00168 1 0.00575 ) 1383 1387 GS 7 GS11 10MY1967 12MY1967 0.00535 ) 0.02772 ) 1385 1388 C-S 9 GS12 10MY1967 12MY1967 C.0C235 ) C. 03620 1 ( 1390 ( 1394 GS14 GS18 12MY1967 13MY1967 0.01174 ) 0.00172 1 1392 1395 GS16 GS19 12MY1967 13MY1967 0.02157 I 0.00470 ) 1393 1398 CS17 GS22 13MY1967 14MY1967 C.0C274 I C.0C304 ) ( 1554 ( 1557 GS 1 GS 4 GS 8 GS11 3CC1967 30C1967 40C1967 50C1967 0.02846 ) 0.07474 I 1555 1558 GS GS 2 5 3CC1967 40C1967 0.39901 ) 0.05549 ) 1556 15 59 GS C-S 3 7 30C1967 40C1S67 C.1C429 ) C. 16087 ) ( 1560 ( 1563 0.06140 ) 0.01871 ) 1561 1564 GS 9 GS12 40C1967 50C1967 0.01174 ) 0.00329 I 1562 1565 GS10 GS13 50C1967 50C1967 O.C0740 ) C. 05578 1 I 1566 1 1569 GS14 GS17 50C1967 50 CI 96 7 0.01101 ) 0.00297 ) 1567 1570 GS15 GS18 50C1967 50C1967 0.04287 1 0.03967 ) 1568 1571 GS16 GS19 50C1967 6CC1967 C.0C577 1 C. 08195 • 30 1 13/2 ( 1575 GS20 GS28 6CC1967 60C1967 C. 00361 I 0.01677 ) 1573 1544 G521 MU 1 6UC196/ 20C1967 C.U0896 ) C. 01430 1 15/4 1547 GS22 CS 1 60C1967 20C1967 C.3653TTT C. 06387 ) I 1524 MI SH 1 20SE1967 18SE1967 0.7662G ) 0.02885 ) 1546 1522 LU BH 1 1 20C1967 18SE1967 C. 09003 ) 0.03100 I 1520 1526 HO CO 1 1 18SE1967 20SE1967 C.CC943 ) C.C4551 ) 1 1527 TR 1 20SE1967 25SF1967 0.11321 ) 0. 02536 1 1529 1545 WL 1 1 20SE1967 2CC1967 0.04797 ) 0.29732 ) 1530 1548 FR CA 1 1 24SE1967 30C1967 C. 11001 ) C.C1272 ) ( 1549 MQ 1 40C1967 5nf.l967 0.45224 ) 15.85925 ) 1551 1553 ES SG 1 1 50C1967 60C1S67 0.27957 ) C. 08079 ) 1552 1428 SM fU 1 2 60C1967 29MY1967 C. 03962 ) 0.02109 ) [ 1426 1 1418 MS SH 2 _2 2SMY1967 22MY1967 0.02100 ) 0.01555 ) 1427 1350 LU BH 2 2 29MY1967 19AP1967 0.02421 ) 1.33918 ) 1417 1401 HO MO 2 2 22MY1967 6MY1967 C. 02243 ) C.C4116 ) ( 1402 1 1354 TR GH 2 2 6MY1967 25AP1967 0.02707 1 0.00345 ) 1400 14C3 SB CA 2 2 6MY1967 10MY1967 0.01787 1 0.01308 I 1352 1404 KM MO 2 2 21AP1967 10MY1967 0.01718 ) C.1C163 ) { 1405 1 142? ES 2 ? 12MY1567 23MY1967 0.03225 ) 0.00511 ) 1407 SM 2 14MY1967 0.04777 1 14C6 OB 2 13MY1967 0.01348 1 Cooconeis -plaeentula var. lineata (Ehr.) V. H. Coccow&is lineata Ehrehherg, Phys. Abh. Akad. Wiss. Berlin, 1847, pi. 5(1), fig. 10. 1849. Cocooneis -plaeentula var. lineata (Ehr.) Van Heurck, Syn. Diat. Belgique, p. 133. 1885. mft r.rpur.ui tpt no of staticns 49 13MY1967 0.00074 ) ( 1397 GS21 13MY1967 0.00065 ) 1 1554 GS 1 30C1967 0.00712 ) ( 1555 GS GS 2 30C1967 40C1967 0.09887 ) 0.01189 1 ( 1556 ( 1559 GS 3 GS 7 30C1967 4CC196 7 0.05736 ) C. 02098 1 1 1557 ( 1561 GS GS 4 9 30C1967 40C1967 C.0C374 ) C.0C587 ) ( 1563 GS11 GS15 5CC1967 50C1967 0.00468 1 0.01746 ) < 1565 ( 1569 GS13 GS17 50C1967 50C1967 0.02028 1 0.00446 1 1 1566 ( 1570 GS14 GS18 50C1967 50C1967 ' 0.O0183 ) C. 42642 ) ( 1571 GS19 60C1967 20C1967 0.00995 ) 0.01668 ) < 1573 ( 1547 GS21 MS 1 60C1967 20C1967 0.00224 ) 0.07984 ) ( 1575 ( 1524 GS28 MI 1 60C1967 20SE1967 C. 01032 ) C. 54729 ) 1 1546 LU RH 1 1 20C1567 18SE1967 0.05502 ) 0.01276 ) ( 1520 ( 1527 HO 1 TR 1 18SE1967 20SE1967 0.02357 I 0.05660 I ( 1521 ( 1529 SH KW 1 1 18SE1967 20SE1967 C. 01154 ) C. 04797 ) ( 1530 1 1548 FR CA 1 1 24SE1967 3HG1967 0.02000 1 0.08905 1 ( 1531 ( 1549 GH 1 MO 1 25SE1967 40C.1967 0.00845 ) 0.12334 1 ( 1545 1 1551 WL ES 1 1 20C1967 50C1967 0.29732 1 C. 03994 ) ( 1552 ( 142 8 SM MU 1 2 60C1967 29MY1967 0.01321 ) 0.01808 ) ( 1550 ( 1426 MR 1 MS 2 50C1967 29MY1967 3.56833 1 C. 43045 1 ( 1553 ( 1351 SG fl 1 2 60C1967 21AP1967 C.C2203 ) C.CC621 1 ( 1427. I 1354 LU GH 2 29MY1967 25AP1967 0.07264 1 0.03452 ) < 1417 { 1429 HO 2 WL 2 22MY1S67 29MY1967 C. 01122 ) 0.05308 1 1 1350 ( 1404 BH 2 2 19AP1967 10MY1967 C. 25330 ) C. 12703 ) ( 1405 ( 1406 ES G8 2 2 12MY1967 13MY1967 0.02580 ) 0.02157 1 1 1407 SM 2 14MY1967 0.04777 ) ( 1349 CI 2 19AP1967 C. 00718 1 Cooconeis thwnensis A. Mayer Cooconeis thwnensis A. Mayer, Bayerisch Kryptog. Forsch., 1:199, pi. 6, fig. 24. 1919. 107 CCTHUMEN TCT NO CF STATIONS 21 C. 00034 ) 1255 D 5 15JL1964 160973 CH 1876 0.02362 ( 46916 CH 4MY1547 C. 00257 1 ( 1256 I 1279 E 2 E 1 14JL1964 16SE1964 0.00183 ) 0.0C393 ) 1259 1285 F 2 F 1 6JL1964 15SE1964 0.00310 ) 0.01165 I 1268 1291 E 2 C 2 15AU1964 160C1564 C.0C274 ) C. 00245 1 ( 1294 ( 1347 D 3 E 2 15CC1964 23AP1967 0.00330 ) 0.00163 ) 1311 1370 D 1 A 6 8N01964 3MY1967 0.00258 ) 0.00230 ) 1344 1375 C 3 E 3 25AP1967 7MY1967 C.CC165 1 C.0C241 ) ( 1543 ( 1394 E 5 GS18 100C1967 13MY1967 0.00718 I 0.0C172 ) 1382 1555 GS 6 GS 2 10MY1967 30C1967 0.00278 ) 0.01059 ) 1392 1557 GS16 GS 4 12MY1967 30C1967 C.CC308 ) C.0C374 ) f Cooconeis sp. #2. Species inoevtae sedis 108 CCSPFCCB TCT NO CF STATIONS 17 16SE1564 (46909 CH MR1947 0.00455 ) 1258 F 1 6JL1S64 0.00236 ) 1279 E 1 C.CC393 1 I 1285 ( 1554 F I GS I 15SE1964 30C1967 0.01165 ) 0.00356 ) 1541 1555 E 2 GS 2 110C1967 3CC1967 0.00532 1 0. 003531 1 1395 1556 GS19 GS 3 GS22 kL 1 13MY1967 3CC1S67 C. 00117 ) C. 00521 ) ( 1562 ( 1521 GS1C TR 1 50C1967 2CSE1967 0.00247 ) 0.0125E ) 1573 1530 GS21 FR 1 60C1967 24SE1967 0.00112 ) 0.0 1000 1 1574 1545 60C1967 20C1967 C. 01151 ) 0.00676 ) ( 1550 MR 1 5CC1967 0.02478 ) 1350 BH 2 19AP1967 0. 00441 ) Cooconeis sp. #3. 109 CCSPECCC TCT NO OF STATIONS 9 ( 1268 ( 1304 ( 3540 CH [1303 F 6 11MY1879 0.0C466 1 130C1964 0.00560 ) E 2 F 1 15AU1964 110C1964 0.00274 ) 0.0024T ) ( 1270 ( 1313 F 1 0 3 10AU1964 9NC1964 C.C1C89 ) C. 00193 ) I 1345 C 5 25AP1967 C.0C195 ) ( 1541 E 2 110C1967 C. 01064 ) ( 1543 E 5 100C1967 C.0C718 ) 31 Cooconeis sp. #4. 110 COSPECCD TCT NO OF STATIONS 11 (46768 EV 1 119? GS16 ( 1558 GS 5 ( 1527 TR 1 16MR1938 12MY1S67 40C1967 _£0SE196 7 0.01170 ) 0.00308 I 0.00396 1 0.00629 ) ( 1305 ( 13S6 F 2 GS20 110C1964 13MY1967 0.00173 ) 0.00074 ) < 1452 ( 1398 E 2 GS22 14JL1967 14HY1967 C.0C213 ) C.O0304 ) ( 1565 ( 1350 GS13 BH 2 50C1967 19AP1967 0.02535 ) 0.00661 ) ( 1526 ( KO 1 20SE1967 0.00569 ) Cooconeis sp. #5. . 1 11 f.QSPECOE TCT NO OF STATIONS 3 . ( . 1279 E 1 16SE1964 0.00393 ) 20C1967 0.00676 ) Cooooneis sp. #6. ii? r.nsPEr.QF tot nc cf staticns 16JL1967 0.00382 1 ( 1557 32 Genus Coseinodiseus Ehrenberg Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1838:128. 1840. Cosoinodisous subsalsa Juhl.-Dannf. Cosoinodiscus subsalsa Juhlin-Dannfelt, Bih. K. Svenska Vet. -Akad. Handl., 6(21) :47, pi. 3, fig. 33. 1882. Cells circular in valve view and rectangular in girdle view. Vegeta- tive cells occur singly or in short colonies of up to 10 cells. Valves of specimens from Lake Michigan 16-42u in diameter. The valve- surface may be either simply concave or concave near the margins and convex in the middle. Ornamentation of the valve surface is composed of conspicuous areolae which are circular in surface focus and more or less hexagonal in deep focus. Areolae in the central portion of the valve coarse, about 10 in lOy, becom- ing much finer, about 20 in lOu, near the margins. Near the periphery of the valve there are several (usually 4-6) slime pores each subtended by a fungiform projection into the interior of the frustule. In living cells long, gelatinous strands extend from these pores. The ornamentation of the valve surface tends to be arranged in loose fascicles that focus on the pores giving a stellate appearance. The systematic position of this entity is somewhat uncertain. Many authorities consider it to be a variety or form of either C. rothit- or C. subtilis. Its recorded distribution indicates a preference for brackish water or waters of high total dissolved solids in inland regions. At the present time it is established in polluted harbors and nearshore waters of Lake Michigan and has become one of the dominant species in the summer plank- ton of Lake Erie. 113 CSROTHVS TOT KC CF STATIONS 13 ( 1230 F 2 16MY1964 0.00296 ) < 1259 F 2 6JU964 0.00310 ) ( 1264 C 1 10AU1964 C.C1545 ) ( 1265 { 1298 C« 2 E 1 10AU1964 120C1964 0.00224 ) 0.00269 ) ( 1272 ( 1302 C 1 E 5 10SE1964 130C1964 0.01231 I 0.00405 ) I 12 79 ( 14C6 E 1 A 3 16SE1964 23MY1967 0.00393 ) C. 00447 ) ( 1416 ( 1568 E 5 GS1.6 28MY1967 50C1967 0.00219 ) 0.00144 ) ( 1536 ( E 2 24SE1967 0. 00273 1 < 1539 C 3 40C1967 C. 00503 1 Species inaevtae sedis Cosoinodiscus sp. (aff. C. tuberculatus ) . 114 CSTUBEVO TOT NO OF STATIONS 1 ( 1264 C 1 10AU1964 0.00386 I ( Genus Cyolotella Kiitz. Klltzing, Syn. Diat. p. 7. 1834. Cyolotella antiqua Wm. Smith Cyatotella antiqua Wm. Smith, Syn. British Diat„, p. 28, pi. 5, fig. 49. 1853. 33 Cells cylindrical with concentrically undulate valves, either concave or convex in the center. Specimens, from Lake Michigan from 12-30u in diameter. The marginal zone is narrow, only about one-third the radius of the valve. The marginal striae are about 16-18 in lOy at the margin, without visible substructure and irregular in length. Regularly spaced thickened ribs, be- low the plane of focus of the striae, appear as "shadow lines" near the mar- gin of the valve, about 5-7 in lOu. The margin of the central area of the valve is ornamented with conspicuous conical depressions of the surface whose surface is covered with fine, irregularly arranged puncta. The base of the conical depression is toward the valve margin and the apex toward the center. The number of these depressions is variable, depending on the size of the valve, but usuallv 6-8 are present. The rest of the central surface of the valve may be without ornamentation or may have a greater or lesser number of randomly arranged punctae of varying sizes. This species is very distinctive in appearance and is not easily con- fused with any other member of the genus occurring in Lake Michigan. It is never a numerically important part of the plankton populations of the lake but numerous examples have been found, particularly in samples from the northern portion of the lake. Previous reports of its distribution indicate that it reaches its greatest abundance in northern and alpine oligotrophic lakes . 115 CYANTIQU TCT NC CF STAT'ICNS 13 ( 1270 F 1 1CAU1964 0.03812 ) ( 12e5 F 1 15SE1964 C. 04077 ) ( 1291 C 2 U0C1S64 C.CC245 ) I 1387 I 1558 GS11 GS 5 12MY1967 40C1967 0.00396 ) 0.01189 ) < 1397 ( 1559 GS21 GS 7 13MV1967 40C1967 C. 00065 I 0.00699 ) ( 1557 ( 1560 GS GS 4 8 30C1967 40C1967 C. 00374 ) C.C1417 ) { 1561 ( 1549 GS 9 NO ! 40C1967 '40C1967 0.00587 ) 0.02741 ) ( 1562 ( GS10 50C1967 0.01727 ) ( 1548 CA 1 30C1967 C.C1272 ) Cyelotella atomus Hust. Cyclotella atomus Hust., Archiv f. Hydrobiol., Suppl. Bd. 15:143, pi. 9, figs. 1-4. 1938. Cells cylindrical with excentrically undulate valves. Specimens from Lake Michigan 2.5-5u in diameter. The marginal zone is narrow, only one-quarter the radius of the valve. The marginal striae are about 16-18 in lOu, without visible substructure. The striae appear as thickened ribs under the light microscope and every fourth or fifth one appears to be more thickened than the others. The only visible ornamentation in the central portion of the valve is a single, rather large, puncta. This structure is usually located about one-half the distance from the center of the valve to inner edge of the marginal striae. Because of the uniformly small size of this species the undulation of the valve can only be seen from the girdle view. The cells are rectangular in girdle view with the length of the pervalvar axis being about one-half the valve diameter. Although this species was originally described from the tropics, its distinctive morphology leaves little doubt of the correct assignment of the specimens from Lake Michigan to it. At present it is quite rare in the flora of the lake. Our records come from inshore areas that receive appreciable chloride contamination. Previous reports from Lake Michigan are lacking. 34 116 CYATOHUS TCT NC CF STATICNS 10JM964 0.C0153 ) ( 1255 ( 1446 ( Ji2_L A 3 „sjh_jl 11JL1967 18SE1967 0.00245 ) 0.01154 ) ( 1451 ( 135C C 7 BH 2 16JL1967 19AP1967 0.00394 ) 0.42290 ) ( 1520 ( Cyolotella oomta (Ehr.) Kutz. Disco-plea oomta Ehr., Ber. Akad. Wiss. Berlin, 1842:267. 1844. Cyolotella oomta (Ehr.) Kutz., Sp. Alg., p. 20. 1849. Cells cylindrical with concentrically undulate valves, either concave or convex in the center. Specimens from Lake Michigan 7.5-55u in diameter. Marginal zone about one-half the radius of the valve. Striae in the marginal zone about 13-18 in lOu at the valve margin, with barely visible substruc- ture composed of two rows of fine puncta. This feature can be resolved with certainty only in the larger individuals. Most of the striae are of the same length and form an even inner margin, but numerous shortened striae of irregular length are interposed between them and there are often 1-6 more or less conspicuous slime pores at the margin of the zone that are subtended by shortened striae. At the outer margin of the valve a row of chambers occurs below the level of the striae. One of these chambers usually sub- tends the base of two striae and appears as a "shadow line" between the striae pairs at high focus. In the smaller individuals these chambers appear as thickenings near the margin of the valve,, The ornamentation of the central area is highly irregular in this taxon,, In the larger individuals the central area is ornamented with randomly arranged small puncta. In the smaller individuals the puncta become compressed and may assume a more or less regular appearance. Many authorities distinguish several varieties on the basis of the arrangement of the central pimctae. While this segrega- tion appears feasible when working with isolated populations, our observa- tions lead us to believe that the cited variations grade into one another so that no morphologic distinction can be made. ( 1270 ( 1272 ( 1275 ( 1278 F 1 C 1 D 2 D 6 ii7 rvrrKTA TCT NO QF STATIONS 302 LfiMJJ r.H 1876 2.92867 1 I 3540 Ch 11MY1879 0.13978 ) ( 3541 CH 1FE1881 1.54553 1 ( 3507 (46908 CH CH CH CH 19FE1881 DE1945 19AP1946 200E1946 0.05660 ) 0.03021 1 0.03097 ) 0.24032 I (46910 (46517 (46924 (46905 CH CH CC1945 12JA1946 0.02403 1 0.09898 ) (46921 (46915 CH CH 23N01945 20FE1946 C. 12611 ) 0.06829 ) (46914 (46920 CH CH 10MY1946 JA1947 0.02681 ) 0.10173 ) (46923 (46909 CH CH 22NC1S46 MR1947 C. 71032 ) 0.17303 1 (46912 (46919 CH CH AP1947 5JN1947 0.01150 1 0.01062 1 (46916 (46907 CH CH 4MY1947 JL1947 C. 00441 ) 0.10651 ) (46906 (46913 CH CH KY1947 6AU1947 C.C1858 ) C. 05230 ) (46922 (46743 CH FV EV FV 21AU1947 20JN1937 25JL1937 30AU1937 2.58315 ) 0.00856 ) 0.06259 ) 0.93698 1 (46758 (46770 EV EV 5JN1937 9JL1937 0.C0357 ) 0.01193 ) (46771 (46764 EV EV 11JN1937 17JL1937 C. 01426 1 C. 01612 ) (46757 (46765 (46747 (46769 EV EV 1AU1937 7SE1937 0.07674 ) 1.34607 ) (46763 (46752 EV EV 23AU1937 15SE1937 C. 36526 ) 1.61080 ) (46760 (46748 EV EV 22SE1937 130C1937 2.48166 I 0.17079 ) (46750 (46767 EV EV 24SE1537 270C1937 0.29222 ) 0.05802 ) (46744 (46749 EV EV 60C1937 12MR1938 C. 12193 ) C.C3641 ) (46768 146759 EV. EV 16MR1938 19MY1938 0.02940 ) 0.01013 ) (46762 (46761 EV EV 18MR1938 27MY1938 0.30878 ) 0.00273 ) (46756 (46766 EV EV 27AP1938 14DE1938 0.01007 ) C. 0316^9 ) ( 1223. ( 1227 B C 3 2 18MY1964 13MY1964 0.00156 ) 0.00219 ) ( 1225 ( 1228 C D 6 2 15MY1964 14MY1964 0.00392 ) C.C0584 1 ( 1226 ( 1229 C 0 7 5 16MY1964 14MY1964 C.0C381 ) O.01480 ) ( 1230 ( 1233 E B 2 3 16MY1964 5JN2964 0.0C593 ) 0.00714 ) ( 1231 ( 1439 E B 3 6 16MY1964 5JN1964 0.00978 ) C. 00200 ) ( 1232 ( 12 36 E C 5 1 16HY1S64 8JN1964 C.C4348 ) 0.00350 ) ( 1237 ( 1240 C D 2 6 8JN1964 10JN1964 0.00258 1 0.C0460 ) ( 1238 ( 1242 0 E 3 3 11JN1964 13JN1964 C.C1600 I C.C0150 1 ( 1239 ( 1243 0 E 4 6 11JM964 13JN1964 C.CC116 1 C.C1462 ) ( 1244 ( 1247 F R 1 3 11JN1964 14JL1964 0.00548 ) C. 19209 ) ( 1245 ( 1248 F B 2 3 11JN1964 24JL1964 C. 00692 ) 2.06905 ) ( 1246 ( 1440 F b 3 6 11JM964 11J11964 0.C4781 ) C.C5528 1 ( 1441 ( 1251 B C 6 7 24JL1964 16JL1964 0.30838 1 0.09271 ) ( 1249 ( 1252 C C« 3 1 8JL1964 16JL1964 0.00815 1 0.01674 ) ( 1250 ( 1253 C C 6 2 10JL1964 16JL1S64 0.14388 ) C. 23279 I { 1254 ( 1257 0 E 2 3 15JL1964 14JL1964 0.01532 ) 0.02153 ) ( 1255 ( 1258 0 F 5 1 15JL1964 6JL1964 0.17966 1 0.12507 ) ( 12 56 ( 1259 E F 2 2 3 7 14JL1964 6JL1964 17AU1964 15AU1964 C. 01466 ) C. 15493 ) ( 1260 ( 1442 F B 3 6 6JL1964 2AU1964 0. 13370 ) 0.12282 1 ( 1261 ( 1443 B B 3 6 2AU1964 16AU1964 0.75555 ) C. 46258 ) ( 1262 ( 1263 B C 1.1C248 ) 1.54123 ) ( 1264 ( 1267 C« 0 1 6 10AU1964 18AU1964 0.81094 ) 0.15132 ) ( 1265 ( 1268 C E 2 2 10AU1964 15AU1964 C.31297 ) 1.43615 ) ( 1266 ( 1269 0 E \ 18AU1964 15AU1964 1.06637 ) 1.15113 ) 10AU1964 10SE1964 5.33696 ) 0.57464 1 ( 1444 _!__12_73__ B 6 C 2 19SE1964 10SE1964 2.97069 ) 0.60218 ) ( 1271 ( 1274 C 7 0 1 17SE1964 18SE1964 0.90317 ) 0.08455 ) ( 1276 ( 1279 D 3 E 1 18SE1964 16SE1964 0.32409 ) 0.20419 1 ( 12 77 ( 1280 C 4 E 2 22SE1964 _17SE_1964 18SE1964 16SE1964 C.2C892 ) C. 47858 ) 1.38803 ) C. 24508 I 35 ( 1281 1 1284 E E 3 6 16SE1S64 17SE1964 0.29039 ) 0.8134C ) ( 1282 ( 1285 E F 4 1 16SE1964 15SE1964 0.55402 1 3.05748 ) ( 1283 ( 1286 t 5 F 2 16SE1964 15SE1964 14CC1964 160C1564 2.78901 ) 1.5324C ) ( 1287 ( 1289 F C 3 7 15SE1964 140C1S64 2.27682 1 0.12313 ) I 1288 ( 1290 e C" 3 1 150C1964 160C1964 C.C1088 ) C. 23877 ) ( 1445 ( 1291 B 6 C 2 C. 74364 ) C.C4403 ) ( 1292 ( 1295 D D 1 4 150C1964 150C1964 0.30933 ) 1.04055 ) ( 1293 ( 1296 D D 5 150C1964 140C1964 C.C8490 ) 0.68852 ) ( 1294 ( 1297 0 3 D 6 150C1964 140C1964 C. 57685 ) C. 02475 ) ( 1298 ( 1301 E E F 8 C 0 1 4 1 6 2 4 120C1964 130C1964 110C1964 N01964 10N01964 •9N01964 0.05924 ) 0.30911 ) ( 1299 13C2 E E 2 120C1964 130C1964 0.24191 I 2.55081 ) < 1300 ( 1303 E 3 E 6 F 3 C 1 0 3 0 6 130C1964 130C1964 110C1964 10N01964 9N01964 9NC1964 C. 62645 ) C. 29106 ) ( 1304 0.11113 ) Q. 15514 ) 0.29252 ) 0.1C048 1 ( 13C5 ( 1308 ( 1311 ( 1315 F C 2 7 U0C1964 6N01964 0.04658 1 0.02737 ) ( 1306 ( 1309 C. 10533 ) C.1C130 ) ( 1310 1 1314 a D 1 5 8N01964 9N01964 C. 10577 ) 0.02730 ) ( 1313 ( 1316 0.C8687 ) C.0C378 ) ( 1317 .. -1- 1320 _ E E 1 4 6N01964 7N01964 C. 20679 ) 0.08687 ) ( 1318 ( 1321 ( 1324 .133 7 1340 1343 E E F C C A 2 5 2 3 7 6 7NC1964 7N01964 6N01964 2NR1967 28MR1967 19AP1967 0.13317 ) 0.03511 ) 0.13975 1 0.02205 ) 0.00145 ) 0.00208 ) ( 1319 ( 1322 ( 1325 ( 1338 1 1341 ( 1344 E 3 E 6 F 3 C 3 A 3 C 3 7N01964 7NC1964 6NG1964 28MR1967 19AP1967 25AP1967 C.2C161 ) < 1323 i._L336_ _ ( 1339 1 134? F C C A 1 3 5 4 6N01964 27JA1967 28MR1967 19AP1967 0.08223 ) 0.00578 ) 0.02182 ) 0.06136 ) C.C0756 1 C. 01454 ) C.C1193 ) C. 00165 ) ( 1345 ( 1348 C E 5 5 25AP1967 23AP1967 0.01559 ) 0.00685 ) 1346 { 1368 C A 7 3 21AP1967 4MY1967 0.00267 ) 0.00628 ) ( 1347 ( 1370 E 2 A 6 C 7 E 5 23AP1967 3MY1967 5MY1967 6MY1967 C.0C325 ) < 1371 { 1374 C E 3 ? 4KY1967 7MY1967 0.00231 ) 0.0C299 ) 1372 1375 1410 1413 C E 5 3 5MY1967 7MY1967 0.00355 ) 0.00722 ) ( 1373 < 1376 C. 01426 ) 0.00562 ) ( 1408 1 1412 A C 3 5 23MY1967 31MY1967 0.00447 ) 0.0C842 ) A C 6 7 24MY1967 25MY1967 C. 01128 ) 0.00632 ) ( 1411 1 1431 C 3 A 3 31MY1967 12JN1967 C. 05334 ) C.0C515 1 1 1432 ( 1436 A E 4 2 13JN1967 15JN1967 0.00766 ) 0.00724 ) 1433 1446 C A 3 3 17JN1967 11JL1967 C. 02584 ) 0.01223 ) ( 1434 ( 1447 C 5 A 4 17JM967 11JL1967 16JL1967 15JL1967 29AU1967 29AU1967 C.0C598 ) C. 00468 ) ( 1449 ( 1452 C E 3 2 16JL1967 14JL1967 0.20253 ) 0.00213 1 1450 1453 C E 5 3 16JL1S67 15JH967 0. 08569 ) 0.01769 ) ( 1451 ( 1454 C 7 E 5 A 6 C 7 C. 00197 ) 0.04001 ) ( 1504 ( 1508 A C 3 3 28AU1967 2SE1967 2.07382 ) 0.27975 1 1505 1609 A C 4 5 28AU1967 2SE1967 1.80357 ) 3.53286 ) ( 1506 ( 1510 0.07846 ) 0.48688 ) ( 1511 E A. 2 3 1SE1967 18SE1967 2.14876 ) 0.04599 1 1512 1533 E A 3 4 1SE1967 19SE1967 C. 82456 ) 0.15783 ) ( 1513 ( 1534 E 5 A 6 31AU1967 19SE1967 1.29725 ) C. 15512 ) < 1535 ( 1538 C E 7 5 20SE1967 23SE1967 0.1706C ) 1.41413 ) 1536 1539 E C 2 3 24SE1967 40C1967 0.41992 ) 0.20630 ) ( 1537 ( 1540 E 3 C 5 24SE1967 40C1967 9.66100 ) 3.82191 ) ( 1541 1 1377 E GS 2 I 110C1967 9MY1967 0.74504 ) 0.00792 ) 1542 1378 E GS 3 2 11CC1967 9MY1967 12.10334 ) C.C0421 1 ( 1543 ( 1379 E 5 GS 3 10OC1967 9MY1967 C. 85476 ) C. 04642 ) ( 1380 ( 1383 GS GS_ 4 7 9MY1967 10MY1967 C.C1009 ) 0.03743 ) 1381 1384 GS GS 5 8 10MY1967 10MY1967 0.01193 ) 0.05731 ) ( 1382 ( 1385 GS 6 GS 9 10MY1967 10MY1967 C. 01943 ) C. 04709 ) ( 1386 1 1389 GS10 GS13 12MY1967 12MY1967 0.08044 ) 0.84057 ) 1387 1390 GS11 GS14 12MY1967 12MY1967 1.06543 ) 1.00411 ) ( 1388 1 1391 GS12 GS15 12MY1967 12MY1967 6.16591 ) 1.17320 ) ( 1392 ( 1395 GS16 GS19 12MY1967 13MY1S67 0.67803 ) 0.12683 ) 1393 1396 GS17 GS20 13MY1967 13KY1967 1.24644 ) 0.04143 ) < 1394 ( 1397 GS18 GS21 13MY1967 13MY1967 C. 52293 ) C.C1177 ) ( 1398 ( 1556 GS22 GS 3 14MY1967 30C1967 0.02732 1 5.84033 1 1554 1557 GS GS 1 4 30C1967 30C1567 0.16011 ) 3.13901 ) ( 1555 1 1558 GS 2 GS 5 30C1967 40C1967 2.96610 ) 8.04661 ) ( 1559 ( 1562 GS 7 GS10 4CCX967 50C1967 4.16171 ) 2.59042 1 1560 1563 GS 8 GS11 40C1967 50C196 7 13.88561 ) 1.80050 ) I 1561 ( 1564 GS 9 GS12 40C1967 50C1967 5.34132 ) C. 39338 1 ( 1565 ( 1568 G.913 GS16 50C1967 50C1967 0.21296 ) 0.67243 I 1566 1569 GS14 GS17 50C1967 50C1967 0.28068 ) 4.16214 I ( 1567 ( 15(0 GS15 CS18 50C1967 5UC19C / 3.11190 1 2.MObH t ( 1571 ( 1574 GS19 GS22 60C1967 60C1967 0.02400 1 ( 0.34229 ) ( 1572 1575 GS20 GS28 60C1967 60C1967 0.00631 ) 0.18063 ) ( 1573 t 1544 GS21 MU 1 60C1967 20C1967 C. 19150 ) C. 02621 ) ( 1547 ( 1520 MS HO 1 1 20C1967 18S61967 0.19960 ) ( 0.20274 > ( 1524 1521 MI SH 1 1 20SE1967 18SE1967 0.08757 ) C. 05193 ) ( 1546 ( 1523 LU 1 RA 1 2CC1967 19SE1967 C.1C004 ) C. 04613 ) ( 1525 ( 1528 PW SB 1 1 2CSE1967 2CSE1967 0.06963 ) ( 3.92723 ) ( 1526 1529 MO Kk 1 1 20SE1967 20SE1967 0.15930 ) 1.00731 ) ( 1527 ( 1530 TR 1 FR 1 20SE1967 24SE1967 C. 07547 ) C. 22002 ) ( 1531 ( 1549 GH MO 1 1 25SE1967 40C1967 0.01691 1 ( 2.08305 ) ( 1545 1551 ML ES 1 1 20C1967 50C1967 0.79735 ) 5.36784 ) i 1548 ( 1552 CA 1 SM 1 30C1967 60C1967 1.5C108 1 C. 41598 ) ( 1550 I 1426 PR MS 1 _2_ 50C1967 29MY1967 0.28497 ) ( 0.01050 ) 1553 1351 SG MI 1 2 60C1967 21AP1567 1.99765 ) C. 01552 ) 0.03110 ) 0.00680 ) ' 1428 1 1427 ( ,1350 I 14C1 MU 2 LU 2 8H 2 CC 2 29MY1967 29MY1967 19AP1967 6MY1967 0.01507 ) C. 26634 ) ( 1417 1 1425 HO P.A 2 2 22MY1?67 25MY1967 0.01122 ) ( 0.01768 ) 1418 1399 SH PW 2 2 22MY1967 5MY1967 C. 00441 1 C. 02352 ) ( 1402 ( 1353 TR FR 2 2 6MY1967 23AP1967 0.01624 ) ( 0.01055 ) 1400 1354 SB GH 2 2 6MY1967 25AP1967 0.02978 ) 0.00173 ) I 1352 ( 1429 ( 1405 KW 2 WL 2 21AP1967 29MY1967 C. 06872 ) C.C4247 ) ( 1403 ( 1407 CA SM 2 2 10MY1967 14MY1967 0.28769 ) ( 0.07165 ) ( 1404 1349 MQ CI 2 2 10MY1967 19AP1967 0.17785 ) 0.00359 ) ES 2 eu 2 12MY1967 23MY1967 C. 40635 ) C. 12816 ) ( 1420 ( 1423 IH WA 2 2 23MY1967 25MY1967 0.03021 ) ( 0.C2565 ) ( 1421 1424 CH 2 2 23MY1967 25MY1967 0.15614 ) 0.02665 ) ( 1*22 GA 2 23MY1967 C. 02555 ) 118 CVCCMTVB TCT NO OF STATICHS 107, (60973 1876 0.73217 ) 3540 0.00466 ) 0.17607 ) (46921 JLM923_ 146906 _X46i45^ (46765 (46760 CH C.H_ CH .JEJL EV JEJL_ 23N01945 22N01946 MY1947 3JL1937 0.00065 ) _0 . 1C928 ) 0.00066 ) _ 0. O2090 I 46917 46920 469C7 46747 CH CH 12JA1946 20DE1946 0.00083 ) 0.04344 ) (46914 (469C5 CH CH CH EV JL1947 1AU1937 C. 00099 ) 0.00495 > (46922 (46763 30AU1937 22S61937 0.07250 I 0.39391 ) 46769 46750 EV EV 7SE1937 24SE1937 0.06513 ) 0.03299 I (46752 (46744 CH EV EV EV C.0C107 ) C. 01348 I 0.02617 I _C.1C!46 ) C. 13061 ) C. 01463 ) (46748 . ( 467_62_ ( 1244 _J. ..12.48 ( 1252 ( 1256 EV EV F 1 _B_2_ C« 1 E 2 130C1937 1 8MB 193 8 0.02135 ) 0.04411 )._ 46767 46772 EV EV 270C1937 18AP1938 0.00774 ) 0.00710 ) (46768 (46756 EV EV 1UN1964 24JL1964 16JL1964 14JL1964 0.0C110 ) 0.01773 ) 0.00279 ) 0.00183 ) 1246 _1440_ 1253 1258 F 3 _B 6_ 11JN1964 11JH964 C. 00598 ) . C. 00737 ) ( 1247 ( 1441 B 3 B 6 16MR1938 27AP1938 14 JL 1964 24JL1964 C 2 F 1 16JL1964 6JL1964 C. 00228 I 0.00944 I ( 1255 ( 1260 D 5 F 3 15JL1964 6JL1964 0.01470 1 C.0C168 J^ C. 02134 ) _C^C1220_ J_ 0.00770 ) C. 01719 ) ( 1262 1 LZ64_ ( 1268 { 1444 ( 1275 ( 1279 0 2 E 1 17AU1964 10AU1964 15AU1964 19SEI964 0.C126C ) 0.00772 ) 0.00821 I J)i00606_L 17SE1964 16SE1964 0.00645 I 0.CC393 ) 1442 1265_ 1269 1272 1277 1281 2AU1964 10AU1964 0.00341 ) 0.00894 ) ( 1263 ( 1266 C 7 D 3 15AU1964 18AU1964 E 3 C 1 D 4 E 3 15AU1964 10SE1964 0.03563 I C.01642 I ( 12 70 ( 1274 F 1 D 1 18SE1964 16SE1964 C. 03098 ) 0.01570 ) ( 1278 (1283 10AU1964 17SE1964 18SE1964 16SE1964 C. 01201 ) _JU02ig5_) C. 03812 I _0.C_0469_)_ C. 00384 ) C.C3065 ) ( 1284 1 1445 1 1294 ..i_iaai_ ( 1300 I 1303 E 6 .£_6_ 0 3 _£L_6„ E 3 E 6 17SE1964 140C1964 0.00318 ) 0.02935 ) 150C1964 140C1964 _ 130C1964 130C1964 0.00330 ) _0._00_190_J 0.00716 1 0.00560 1 1285 1289 1295 1298_ 1301 13C5 F I C 7 15SE1964 14CC1964 0.01165 ) C. 00440 ) < 1287 ( 1293 15SE1964 150CI964 D 4 J _1_ E 4 F 2 150C1964 120C1964 0.01784 ) 0.00808 ) ( 1296 1 1299 0 5 E 2_ 140C1964 120C1964 130C1964 110C1964 0.00883 ) 0.00173 1 ( 1302 ( 1306 E 5 F 3 130C1964 110C1964 C. 01001 ) C. 00472 ) C.CU80 ) C.CC314 ) C.C3644 ) C.0C554 ) ( 1309 _!.. JJ22_ I 1341 .L_13*6_ ( 1431 ( 1450 C 1 E 6 A 3 _C_JL 10N01964 7N01 964 19AP196 7 21AP1967 0.00161 ) 0.00667 0.00434 ) 0.00134 ) 1311 1323 1342 1348 D 1 F 1 8N01964 6N01964 0.00258 ) C. 00418 I ( 1320 ( 1324 E 4 F 2 7N01964 6NC1964 19AP1967 23AP1967 0.00180 ) 0.00137 ) ( 1343 ( 1373 A 6 C 7 19AP1967 5HY1967 C. 00414 ) C.CC699 1 C. 00069 ) C.CC285 ) A 3 C 5 12JN1967 16JL1967 O.0C257 ) 0.00381 ) 1435 1451 C 7 C 7 13JN1967 16JL1967 0.00316 I 0.00197 ) ( 1449 ( 1454 C 3 E 5 16JL1967 15JL1967 C.C1146 ) C.CC400 ) ( 1504 L..15_L0_ A 3 _CJ_ 28AU1967 29AU1967 0.01481 ) 0.01265 ) 1505 1511 A 4 . E 2 28AU1967 1SE1967 C. 03092 ) 0.04604 ) ( 1509 1 1512 C 5 E 3 2SE1967 1SE1967 C.07C66 ) C. 02356 1 ( 1513 J-1538_ ( 1542 E 5 _E_5_ 31AU1967 23SE1967 0.01520 ) __0._0 1657_)_ 1536 .1540 E 2 E 5 24SE1967 40C1967 100C1967 0.00545 0.00993 ( 1537 ( 1541 24SE1967 110C1967 C. 17683 ) C. 02129 ) 36 Cyolotella ovygtioa Reimann, Lewin and Guillard Cyolotella ovyiptioa Reimann, Lewin and Guillard, Phycologia, 3:82, figs, 4-6. 1963. Cells cylindrical with slightly concentrically undulate, nearly flat, valves. Cells always occur singly. Specimens from Lake Michigan 8-16u in diameter. Ornamentation of the marginal zone consists of rather broad, chambered, striae, without substructure visible under the light microscope, separated by radiate costae. Striae and costae about 6-9 in lOu at the margin of the valves. A rather inconspicuous spine occurs at the marginal end of each of the costae. The chambers of the costae grade into the sur- face of the central area so that the central area has no well defined border. The striae are also somewhat variable in length, especially in the larger individuals. The only visible ornamentation of the central area is one or more (usually less than 5) distinct puncta. These puncta are somewhat ran- dom in arrangement, but are never central and are most often confined to one side of the central area. This species resembles C. meneghiniana and several of its described varieties. Evidence begins to accumulate that entities described as C. meneghiniana include a number of species of superficially similar morphology that are difficult to distinguish under the light microscope. According to our evidence C. OTtfptioa is quite rare in the Lake Michi- gan flora and the majority of our records come from harbors and from inshore areas subject to appreciable chloride contamination. Its distribution in this respect is quite similar to that of C. meneghiniana and some of its des- cribed varieties. With adequate optical equipment, determination of the two entities is not especially difficult but care must be taken and previous re- cords, especially those derived from observations of living material, should be treated with caution. 115 CYCRYPT1 TOT NO OF STATIGNS 18 17SE1564 23AP1967 ( 1269 I 128? E 3 E 4 15AU1964 16SE1964 0.0C274 ) 0.01108 ) 1273 1284 C E 2 6 10SE1964 17SE1964 0.00538 ) 0.C0318 ) 1274 1348 0 1 E 5 C.CC469 ) 0.00137 ) ( 1451 1 1533 C 7 A 4 16JL1S67 19SE1967 C.CC394 ) 0.03714 ) 1452 1534 E A 2 6 14JL1567 19SE1967 0.01490 ) 0.00310 ) 15C4 1536 A 3 E 2 E 2 C-S28 28AU1567 24SE1967 11001967 60C1967 C.CC741 ) C. 07362 ) ( 1537 _L_1542 ._ E 3 E 3 24SE1967 110C1967 0.03450 ) 0.07628 ) 1538 1543 E E 5 23SE1967 100C1967 C. 00552 ) 0.03591 ) 1541 1575 C. 20755 ) C. 00129 ) Cyclotella kuetzingiana Thwaites Cyolotella kVitzingiana Thwaites, Ann. Mag. 1848. Nat. Hist., ser. 2, 1:169. Cells cylindrical with slightly excentrically undulate valves. Speci- mens from Lake Michigan 7-32u in diameter, always occurring singly. Mar- ginal zone somewhat variable in width, about one-quarter — one-half the radius of the valve. Ornamentation of the marginal zone composed of non- punctate striae, 12-14 in lOu at the margin of the valve. The striae are of variable length, especially in the smaller individuals . In the larger individuals the inner border of the marginal zone is regular due to the 37 fact that the longer striae are all of approximately the same length. In the smaller individuals the border between the two zones appears less regu- lar due to the fewer number of striae present. The ornamentation of the central area is highly variable in this taxon. A number of distinct puncta are present in all individuals. These may be of larger or smaller size and may be either randomly arranged or disposed radially. Other structures such as chambers or thickenings of the valve surface are lacking. A number of varieties of this species have been described on the basis of the various patterns of ornamentation of the central area. Individual specimens can be found in the collections from Lake Michigan that are iden- tical to nearly all of these. When populations are considered, these varia- tions grade into one another so completely that no such distinctions can be made. 120 C YKUTZ1N TCT NX CF STATIONS 13 5 < 35*0 CH 11. V1879 0.00932 ) ( 3541 CH IFE1881 0.06847 ) ( 35C7 (46922 ( 1232 CH CH E 5 19FE1881 21AU194 7 16MY1964 C. 01132 ) (46905 1 46747 CH EV JA1947 1AU1937 0.00123 1 0. 00248 ) (469C7 (46744 CH EV JL1947 60C1537 C. 00099 ) C. 00488 ) C.CC048 ) C.CC174 ) ( 1440 ( 1259 B F C F 6 2 2 1 11JL1964 6JL1964 1CAU1964 10AU1964 0.OC369 ) 0.00310 ) ( 1441 1260 8 F 6 3 24JL1964 6JL1964 0.01762 ) C. 00191 ) 1253 ( 1264 C C E E E F 2 1 2 1 4 1 16JL1964 10AU1964 15AU1964 16SE1964 16SE1964 15SE1964 C.CC228 ) C.CC193 I ( 1265 . 1_J12.70.. 0.00894 ) 0.00817 ) 0.01362 ) 0.03065 ) 1 1266 ( 1272 1281 ( 1284 D C E E 3 1 6 18AU1964 10SE1964 16SE1964 17SE1964 C. 22099 ) 0.03694 ) 0.C157O ) 0.04766 ) 1268 1279 0.C0274 ) C.CC393 ) ( 1280 ( 1283 E E 2 5 •16SE1964 16SE1964 1282 1285 C.C4432 1 0.01165 ) ( 1292 ( 1295 0 D 1 4 15GC1964 150C1964 0.00745 ) 0.03566 ) 1293 1296 1300 1303 D 0 E E 2 5 3 6 15CC1964 140C1964 130C1964 13CC1964 0.00472 ) 0.00393 ) 0.02148 ) 0.01679 I 1294 1298 13C1 1306 1317 1321 D E E F E E 3 1 4 3 1 5 150C1964 120C1964 V30C1964 HOC 1964 6NC1964 7N01964 C.CC659 ) 0.0C539 ) ( 1299 .. (.1302 _ E E 8 E 2 5 6 3 120C1964 130C1964 0.00628 ) 0.03239 ) C. 03091 ) C.0C832 ) 1 1307 ( 1319 N01964 7N01964 0.00361 ) 0.01833 ) 1309 1320 C E 1 4 10N01964 7NG1964 C. 00643 ) C.C0620 ) C.0C191 ) 1 1322 — JL 1345. .... E C 6 5 7N01964 25AP1967 0.0C333 ) 0.00585 ) 1339 1346 C C 5 7 28MR1967 21AP1967 C. 00312 1 C. 00401 ) 1340 1375 C E 7 3 28MR1967 7MY1967 C.0C073 1 C.CC241 ) ( 1376 L_15Q_l E A 5 3 6. Y1967 28AU1967 0.00562 1 0.00247 ) 1410 1509 A C 6 24. Y1967 2SE1967 0.00564 ) C.O10O9 1 1449 1510 C C 7 16JL1967 29AU1967 31AU1967 19SE1961 C. 02293 I C.CC632 ) • ( 1511 ( 1532 E A 2 3 1SE1967 18SE1967 0.53719 ) 0.00329 ) 1512 1533 E A 3 4 1SE1967 19SE1967 1.37427 1 0.00464 ) 1513 1534 E A 5 6 1.77359 ) C.0C931 ) < 1535 ( 1538 C E 7 5 20SE1967 23SE1967 0.00322 ) 0.59659 ) 1536 1539 E C 2 3 24SE1967 4CC1967 0.11452 ) C. 02013 ) 1537 1540 E C 3 5 24SE1967 40C1967 5.73622 ) C.2C350 I ( 1541 ( 1379 E GS 2 3 110C1967 9. Y1967 0.4C977 ) 0.00309 I 1542 1380 E GS GS GS 3 4 110C1967 9MY1967 12.81530 I C.C0168 ) 1543 1381 E GS 5 5 100C1967 10MY1967 1.1C616 ) C.0C239 ) ( 1382 1 1.87 GS 6 GS11 10. Y1967 12MY1967 0.00278 1 0.10694 ) 1383 1388 7 2 10MY1967 12MY1967 0.01871 ) 0.56712 1 13 84 1389 GS 8 GS13 10MY1967 12MY1967 C. 01479 ) 0.1C056 ) ( 1390 ( 1393 GS14 GS17 12MY1967 13. Y1967 0.05285 ) 0.02192 ! 1391 1394 GS15 GS18 12MY1967 13MY1967 0.01915 ) C. 03096 ) 1392 1395 GS16 CS19 12MY1967 13MY1967 0.05548 ) C. 00822 ) 1 1396 -L.JL5.55_ GS20 GS 2 GS 5 GS 9 13HY1967 30C1967 4CG1967 40C1967 0.00222 ) 0.74153 ) 1398 1556 GS_ GS 2 3 7 C 14MY1967 3CC1967 0.00607 ) C. 49017 I 1554 1557 GS GS 1 4 30C1967 30C1967 C. 31310 ) 0. 32885 ) t 1558 ( 1561 0.61440 ) 1.17391 ) 1559 1562 GS GS1 40C1967 50C1967 0.35672 ) 1.55425 1 1560 1563 GS 8 GS11 40C1567 50C1967 1.20909 ) C. 59627 ) 1 1564 1 1567 GS12 GS15 50C1967 50C1967 0.38515 ) 0.73987 ) 1565 ( 1568 GS13 GS16 50C1967 50C1967 C. 64395 ) 0.13564 ) ( 1566 1569 GS14 GS17 50C1967 50C1967 0.42.28 1 C. 38054 ) ( 1570 ( 15J74_ GS Si. HO .0 18 22 50C1967 6CC1967 0.93217 ) 0.11218 ) 1571 1575 GS19 GS28 60C1967 60C1967 C. 00351 ) 0.01032 1 ( 1573 1547 GS21 . S 1 60C1967 20C1967 C.C1680 ) 0.00798 ) ( 1520 ( 1526 1 1 18SE1967 20SE1967 0.0C943 ) 0.06827 ) 1522 1527 BH TR { 18SE1967 20SE1967 0.00182 ) 0.01258 ) 1523 1528 RA SB 1 1 19SE1967 • 20SE1967 C.CC923 ) 1.57378 ) ( 1529 ( 1548 KM CA 1 1 20SE1967 30C1967 0.25183 ) 0.36891 ) 1530 ( 1549 FR MS 1 1 24SE1967 40C1967 C. 02000 ) 0.21927 ) 1531 1551 GH ES 1 1 25SE1967 50C1967 C.0C845 ) 3.96198 ) t 1552 ( 1428 SM MU 1 ? 60C1967 29. Y1967 0.01981 ) 0.00301 1 ( 1550 ( 1427 MR LU 1 2 50C1967 29MY1967 C. 16107 ) 0.01211 ) 1553 1399 SG PU 1 2 60C1967 5MY1967 C. 31580 ) C.C0680 1 ( 1401 C 135. MO 2 ? 6. Y1967 21AP1967 0.00588 1 0.00859 1 14C2 1405 TR ES 2 ? 6MY1967 1? KY1967 C. 01083 1 C. 07095 1 ( 1400 1407 SB SM 2 2 6MY1967 14MY1967 C.CC596 ) C.C3583 ) Cyalotella meneghiniana Kutz. Cyclotella meneghiniana Kutzing, Bacill., p. 50, pi. 30, fig. 68. 1844. Cells cylindrical with strongly excentrically undulate valves. Cells usually occur singly. Specimens from Lake Michigan 7-30p in diameter. Or- namentation of the marginal zone consists of broad, chambered striae sepa- rated by radiate costae. Striae and costae 6-9 (usually 7 or 8) in lOu at the margin of the valve. The striae are all of equal length and have no substructure visible under the light microscope. The width of the marginal 38 zone is about one-half the radius of the valve. The border between the two zones of the valve surface is very well marked and regular. The ornamenta- tion of the central area consists of very fine and indistinct radiating striae occasionally with one or more larger isolated puncta. In some speci- mens the central area has no visible structure. As noted in the discussion of C. oryptioa, the reports of this species probably include several taxa of similar morphology. In Lake Michigan the nominate variety of C. meneghiniana is much rarer than C. meneghiniana var. plana described below. Our limited observations indicate that differences between these two taxa are great enough so that further study may prove them to be separate species. Final determination of the status of the numerous described taxa that are included in C. meneghiniana by most authorities awaits the patient research of the monographer. 123 CYMENEGH TOT NO OF STATU NS 52 "oVbcYetT 0.00368 ) ( 35C7 (46 0.00365 1 ( 1520 ( 1523 C. 02357 ) ( 1526 ( 1529 MO KM 1 1 20SE1967 20SE1967 0.03145 ) C. 08001 ) ( 1528 I 1531 SB GH 1 1 20SE1967 25SE1967 C.C2888 ) C.0C845 ) ( 1545 ( 1551 ML ES SG BH 1 1 1 2 20C1967 50C1967 6CC1967 19AP1967 0.4257C ) 1.66147 ) 0.03672 ) 0.00220 ) ( 1548 ( 1552 CA SM 1 1 3CC1967 60C1967 4.47780 . C.C2641 1 ( 1549 ( 1550 CR 1 1 40C1967 50C1967 22MY1967 6MY1967 29MY1967 12MY1967 1.72674 ) 0.2106 3 I ( 1553 ( 1350 ( 1351 ( 1399 MI PM 2 2 21AP1967 5MY1967 0.00310 ) 0.00680 I ( 1417 1 1401 HO 2 2 2 2 C. 01122 1 ( 1400 ( 1403 SB CA 2 2 .6MY1967 10MY1967 0.00596 ) 0.32693 ) ( 1352 ( 1404 KM MC 2 2 21AP1967 10MY1967 0.00859 1 C. 05081 ) ( 1429 ( 1405 ML ES CO 106 2 '")"'" C.C516C ) ( 1407 ( 1421 SM CH 2 2 14MY1967 23MY1967 0.01791 1 0.05205 ) ( 1349 ( 1422 CI GA 2 2 19AP1967 23MY1967 0.01437 ) C. 00511 ) ( 1420 ( 1423 IH MA 2 2 23MY1967 25MY1967 C. 01511 ) C.CC856 ) 41 Cyolotella ooellata Pant. Cyclotella ooellata Pantocsek, Res. Wiss. Erforsh. Balatonsees, Sec. I., p. 104, fig. 318. 1902. Cells cylindrical, surface of the valves flat or only slightly concave. Cells always occur singly. Specimens from Lake Michigan 6-22u in diameter. Marginal zone narrow, less than one-half the radius of the valve. Radial striae in the marginal zone irregular in length, without visible substruc- ture, about 14-16 in lOy at the margin of the valve. Ornamentation of the marginal zone other than the striae is lacking in this species. Two types of structure are present in the central area. Several distinct puncta, either randomly or radially arranged, are present in most specimens. The most distinctive characteristic of this species is the presence of several large (about lu diameter) circular silicious structures. In valve view these appear as thickenings on the valve surface. In girdle view they appear as fungiform papillae. These structures, like the puncta, may be randomly arranged or, more usually, radially disposed. Although previous reports indicate that this species reaches its greatest abundance in littoral habitats, it is apparently also adapted to euplanktonic growth as it is quite common in offshore collections from the Great Lakes. It reaches its greatest abundance in Lake Huron but is also found in abundance in Lake Superior and in some collections from northern Lake Michigan. The morphology of this taxon is very similar to the C. kuetzing-iana complex, but the presence of the fungiform papillae makes their separation relatively easy. 127 CYOCEILA TCT NC GF STATIONS 270 16C973 CH CH CH CH CH 1876 0.4C151 I 3 540 CH CH CF CH CH 11KY1879 0.23296 ) 3541 CH 1FE1881 0.29346 ) ( 3507 (46917 19FE1881 12JA1946 0.16980 ) 0.01275 ) 46910 46915 46 923 469C9 — 0C1945 20FE1946 C. 00109 ) 0.02845 ) 46921 46914 CH CH 23ND1945 19AP1946 0.00582 ) C.C1922 ) (46924 (46905 10NY1946 JA1947 0.01411 ) 0.01961 ) 22N01946 MR1947 0.00437 ) 0.00455 ) 46920 46916 CH CH 200E1946 4MY1947 C. 00031 ) C.0C780 ) (46906 .... 146922 CH CH EV FV EV EV PY1947 21AU1947 20JN1937 ._. 25JL1937 30AU1937 60C1S37 0.2157C ) C. 56703 ) 46919 46758 CH EV 5JN1947 5JN1937 0.05463 ) 0.01426 1 46907 46771 CH EV JL1947 11JN1937 C.C7052 ) C.CC475 ) (46743 146I5J7_ 0.01713 ) 0.18295 ) 0.02231 1 0.01463 ) 46745 46747 46752 46748 EV EV 3JL1937 1AU1937 C. 02090 ) 0.02723 ) 46764 46763 EV EV 17JL1937 23AU1537 C. 16116 ) C.1C146 ) (46765 (46 744 EV EV 15SE1937 130C1937 0.02177 1 0.02135 ) 46750 46749 EV EV 24SE1937 12HR1936 0.O0471 ) C.C6069 ) (46762 (46759 EV EV 18MR1938 19MY1S38 0.04411 1 0.01688 ) 46751 46761 EV EV 30MR1938 27MY1938 0.03350 ) C.C1090 ) 46756 1226 EV C 7 27AP1938 16MY1964 C.CC168 ) 0.00381 I ( 1227 ( 12i£L C E 2 2 13MY1964 16MY1964 0.00219 ) 0.00889 ) 1228 1231 0 E 2 3 14MY1964 16MY1964 0.00584 ) C. 01223 ) 1229 1232 D E 5 5 14MY1964 16MY1964 C. 02749 ) C. 01044 ) ( 1234 1 1238 B D 3 3 18JN1964 11JN1964 0.00562 ) 0.01600 ) 1439 1239 8 D 6 4 5JN1964 11JN1964 C.C0400 ) 0.00116 ) 1237 1240 C D 2 6 8JN1964 10JN1964 C. 00516 ) C.0C767 ) ( 1241 ( 1244 E F 2 1 13JN1964 11JN1964 0.00739 1 0.OC877 ) 1242 1245 E F 3 2 13JN1964 11JN1964 0.00599 ) C. 01037 ) 1243 1246 E F 6 3 13JN1964 11JN1964 C. 01879 ) 0.C2390 1 ( 1247 ( 1441 B B 3 6 14JL1964 24JL1964 0.01707 ) 0.09251 ) 1248 1249 B C 3 3 24JL1964 8JL1964 0.00591 ) 0.00272 ) 1440 1250 B C 6 6 11JL1964 10JL1964 C. 05159 ) 0. 08222 ) { 1251 I 1254 C n 7 2 16JL1964 15.11 1964 0.01159 ) (1.12067 1 1252 1255 C D 1 5 16JL1964 15JL1964 0.00279 ) 0.39526 ) 1253 1256 C E 2 ? 16JL1S64 14JL1964 0.C3423 I C.C8244 1 ( 1257 ( 1260 E F 3 3 14JL1964 6JL1964 0.07656 ) 0.07831 ) 1258 1261 F B 1 3 6JL1964 2AU1964 0.08259 ) 0.00589 ) 1259 1442 F B 2 6 6J 1.1964 2AU1964 C. 13014 ) C. 13306 I ( 1443 t 1263 B C 6 2 16AU1964 10AU1964 0.01186 ) 0.09389 ) 1263 1266 C D 7 3 15AU1964 18AU1964 C. 00400 1 0.49109 ) 1264 1267 C" 0 1 6 10AU1564 18AU1964 C. 01545 ) C.01C81 ) ( 1268 ( 1444 E B 2 6 15AU1964 19SE1964 0.38297 1 0. 00606 ) 1269 1271 E c 3 7 15AU1964 22SE1964 0.25763 1 0. 01306 ) 1270 1273 F c 1 2 10AU1964 10SE1964 C. 47651 ) C. 01075 ) ( 1275 ( 1279 0 E 2 1 17SE1964 16SE1964 0. 01290 ) 0.00393 ) 1276 1280 D E 3 2 18SE1964 16SE1964 0.01118 ) 0.01362 I 1278 1281 1284 1445 c E 6 3 18SE1964 16SE1964 C.CC384 ) 0.02747 ) ( 1282 L 1285 E F 4 1 16SE1964 15SE1964 0.01108 1 0.11648 I 12e3 1287 E F 5 3 16SE1964 15SE1964 0.08582 ) 0.06505 ) E B 6 6 17SE1964 140C1964 0.04766 ) 0.00652 ) { 1289 ( 1294 C D 7 3 140C1964 150C1964 0.00440 ) 0.04615 ) 1290 1295 C D 1 4 160C1964 15DC1964 C. 00379 ) C. 07730 ) 1293 1296 D 0 2 5 150C1964 140C1564 C.C3302 1 C.C2361 ) ( 1297 ( 1300 D E 6 3 14CC1964 13CC1964 O.C0571 1 0.02148 I 1298 1301 6 E F B 0 c 1 4 1 6 2 5 12CC1964 130C1964 110C1964 N01964 0.00269 ) 0.06624 1 C. 02223 1 C. 00722 ). 1299 13C2 E E 2 5 12CC1964 130C1964 C.0C943 I C. 17005 ) ( 1303 ( 1306 E F D D 6 3 1 4 130C1964 110C1964 8N01964 9K01964 0.04478 ) 0.0G832 ) 0.00516 1 0.00287 ) 1304 13C7 1312 1315 1305 1309 F C 2 1 110C1964 10N01964 C.0C518 ) C.CC322 ) ( 1311 ( 1314 8NC1964 9N01964 C. 00621 ) C. 00910 ) 1313 1316 D D 3 6 9N01964 SNC1964 0.01737 ) C.CC756 ) ' 42 1 1317 ( 1320 E E 1 4 6N01964 7N01S64 0.0C766 ) 1 0.03723 ) ( 1318 1321 1324 1338 1341 1344 b i E 5 F 2 C 3 A 3 C 3 /M-1S64 7N01964 6K01964 28MR1967 19AP1967 25AP1967 U.UIB34 1 0.02235 ) 0.00699 ) 0.C4496 ) 0.02170 1 C. 00496 ) I 1319 ( 1322 1 1336 t 1339 I 1342 1 1345 E E C c A C 3 6 3 5 4 5 7N01964 7NC1964 """ 27JA1967 28MR1967 19AP1967 25AP1967 C. 22255 ) C.CC667 ) ( 1323 „„LJL337 1 1340 ( 1343 F t" C A 1 3 7 6 6N01964 2MR1967 28PR1967 19AP1967 0.0C697 ) I 0.01029 ) ( 0.02327 ) ( 0.O0C69 ) { C.C2806 ) C. 05233 ) C. 07407 ) ( 1346 I 1368 C A C 7 3 3 21AP1967 4MY1967 4HY1967 7MY1967 0. 02804 ) { 0.CC943 ) 1347 1369 E 2 A 4 C 5 E 3 23AP1967 4KY1567 5MY1967 7MY1S67 C. 024 39 ) 0.01118 ) C. 01064 ) C. 08181 ) ( 1348 ( 1370 1 1373 I 1376 E A C E 5 6 7 5 23AP1967 3MY1967 5MY1967 6MY1967 C.0C548 ) 0.CC921 ) 1 1371 .. J 1374.. ( 1409 1 1412 ( 1415 0.0C693 ) ( 0.01793 I 13 72 1375 C.1S255 ) C.C477S ) A c. E 4 5 3 23MY1967 31MY1967 28MY1967 13JN1967 0.00595 ) I 0.00421 ) 1410 1413 A 6 C 7 24MY1567 25MY1967 0.01128 ) 0.00948 ) < 1411 ( 1414 C E 3 2 31MY1967 28KY1967 C.C1231 ) C.CC672 ) 0.00225 ) 0.01788 ) 1416 1433 E 5 C 3 28MY1967 17JN1967 0.00656 ) 0.08397 ) ( 1431 C 1434 A C 3 5 12JN1967 17JN1967 C.C1802 ) C.C2393 ) ( 1435 _1 1438 ( . 1448 C .. E_ A 7 5 6 13JN1567 14JN1967 10JL1967 16JL1967 0.02210 ) C, 01089 ) 0.00354 ) 0.00394 I 1436 1446 1449 1452 E 2 A 3 C 3 E 2 15JN1967 11JL1967 16JU567 14JL1967 C. 03257 ) 0.10273 ) ( 1437 ( 1447 E A 3 4 15JN1967 11JL1967 C. 00269 ) C.C1871 ) C.16050 ) 0.03193 ) ( 1450 ( 1453 C E 5 3 16JL1967 15JL1967 C. 19804 ) C. 13902 ) 1 1454 E C E A e E 5 .3 2 3 3 2 15JL1967 2_StlS67 1SE1967 18SE1967 24SE1967 11GC1967 0.09202 ) 0,00400 ) 1504 1509 A 3 C 5 28AU1S67 2SE1967 C. 00741 ) 0.70657 ) ( 1505 1 1510 A C E E C E 4 7 5 2 5 5 28AU1967 29AU1967 31AU1967 24SE1967 4CC1967 100X1967 C.01031 ) C. 02645 ) ( 1511 I _JL53_2 2.57851 ) 0.00986 ) 1512 1533 E 3 A 4 E 5 E 3 1SE1967 19SE1967 23SE1967 110C1967 C. 27485 I C. 03714 ) 0.09391 ) 3.38181 ) ( 1513 ( 1536 ( 1540 ( 1543 C.6C302 ) C. 22632 ) ( 1537 1.50953 ) 0.28205 ) 1538 1542 C. 26307 ) C. 10056 ) ( 1378 J_138JL cs GS 2 5 SMY1967 10MY1967 0.00421 ) 0.01431 ) 1379 1382 GS 3 GS 6 9MY1967 10MY1967 0.05571 1 0.09714 ) ( 1380 ( 1383 GS GS 4 7 9MY1967 10MY1967 C.C1513 ) 0.04544 ) ( 1384 I L3BJL GS 8 GS11 10MY1967 12MY1567 0.C8319 ) 0.07129 ) 6.04110 ! 0.12601 ) 1385 1388 1391 1394 GS 9 GS12 • 10MY1967 12MY1967 0. 00471 ) 0.04223 ) ( 1386 ( 1389 GSIO CS13 12HY1967 12MY1967 C. 11204 ) C. 01547 ) ( 1390 GS14 GS17 12MY1S67 13MY1967 GS15 GS18 12MY1967 13MY1967 0.06225 I C. 03096 1 ( 1392 ( 1395 GS16 C-S19 12MY1967 13MY1967 C.C4623 ) C.0C822 ) ( 1398 I 1556 ( 1559 GS22 GS 3 GS 7 GS10 14PY1967 3CC1967 40C1S67 50C1967 0.02125 ) 0.23987 ) 0.32874 ) 0.15789 ) 1554 1557 1560 1563 GS 1 GS 4 30C1967 3CC1967 0.08695 ) 0.36248 ) I 1555 < 1558 GS GS 2 5 30C1967 40C1967 C. 44845 ) C. 30918 ) GS 8 GS11 40C1S67 50C1967 C. 41562 ) 0.01169 1 1 1561 I 1564 GS 9 GS12 40C1967 5CC1967 C.1C565 ) C. 00165 ) ( 1565 I 1568 GS13 GS16 50C1967 50C1967 0.00507 ) 0.00433 ) 1566 1569 GS14 GS17 50C1967 50C1967 0.00183 ) 0.02676 1 ( 1567 ( 1570 GS15 GS18 50C1967 50C1967 C.C3969 ) C.C8925 ) I 1573 GS21 MIJ 1 60C1967 20C1967 0.00112 ) 0.00238 ) 1574 1547 GS22 MS 1 60C1967 20C1967 0.00575 ) 0.01597 ) ( 1575 ( 1520 GS28 FO 1 60C1967 18SE1967 C. 00129 ) C. 00471 ) 1 1521 t 152& SH SB 1 1 18SE1967 2CSE1967 0.00577 ) 0.04332 ) 1526 1529 MO 1 KW 1 20SE1967 20SE1967 0.01T07 ) 0.02398 ) ( 1527 C 1530 TR FR 1 1 20SE1967 24SE1567 0.00629 ) C.C3000 I ( 1531 1 1549 GH MO 1 1 25SE1967 40C1967 0.00845 I 0.04111 ) 1545 ( 1551 hL 1 ES 1 20C1967 5CC1967 0.10136 ) C. 19171 ) < 1548 ( 1550 CA ►R 1 1 30C196 7 50C1967 C. 02544 ) 0.06673 ) < 1553 ( 1417 SG HO 1 2 60C196 7 22MY1S67 0.05141 ) 0.01495 ) 1351 1 1425 MI 2 RA 2 21AP1967 25CY1967 0.01241 ) 0.02652 ) ( 1427 < 1399 LU 2 2 29MY1967 5KY1967 6MY1967 29HY196 7 0.13317 ) C. 04761 ) ( 1401 1 1352 HO KM 2 2 6MY1967 21AP1967 0.02352 ) 0.02577 1 1402 ( 1354 TR 2 GH 2 6MY1967 25AP1967 0.02707 ) 0.00173 1 ( 14C0 ( 1429 SB tiL 2 2 C. 02383 ) C. 01062 1 ( 140 3 1 1349 CA CI 2 2 10MY1967 19AP1967 0.10462 ) 0.0C359 ) 1 1404 ( 1420 MC 2 IH 2 10MY1967 23MY1967 0.03811 1 0.01511 I 1 1405 ( 1421 ES CH 2 2 12MY1967 23MY1967 C. 03870 ) C.C694C ) ( 1423 HA 2 25MY1967 0.02141 ! 1424 KN 2 25MY1967 0. 01332 ) ( 1430 fC 2 12JN1967 C. 02467 ) Cyclotella operaulata (Agardh.) Kiitz. Frustulia operaulata Agardh., Bot. Zeitschr., 1827:627. 1827. Cyelote'lla operaulata (Agardh) Klltzing, Syn. Mat., p. 7. 1834. Cells cylindrical with slightly excentrically undulate valves. (Jells always occur singly. Specimens from Lake Michigan 8-32-ij in diameter.. Or- namentation of the marginal zone consists of narrow striae chambers separated by very poorly developed radial costae. Near the margin of the valve the striae chambers open to the interior of the frustule by a series of foramina that appear as a series of bright or dark spots under the light microscope, depending on the level of focus. Striae 15-18 in lOu near the margin of the valve. The external surface of the striae chambers has a double row of very fine punctae. These are very difficult to resolve and can be seen only with ideal specimens and the best optical equipment. The central area in this species is without visible ornamentation and is usually slightly excentric. In some specimens one or more shortened striae of peculiar structure occur at the margin of the valve. 43 This species apparently belongs to the complex of described entities with affinities to C. striata. It in some respect resembles C. mLckiganiarux but is easily differentiated from that taxon by the lack of ornamentation of the central area and its only slightly undulate valves. This species occur- rence in Lake Michigan is highly irregular and only occasional collections have it in abundance. It appears that its primary habitat may be in the phytobenthos and that it is only opportunistically planktonic. It is also found in some inland lakes in Michigan. Specimens from these habitats tend to be larger in average size and to have more robust structure than those from Lake Michigan. 128 CVPIMKT TOT NC OF STATIONS 170 (46910 (46915 CH CH 0C1S45 20FE1946 C.0C874 ) 0.01138 ) ( 46921 46914 46 920 1228 CH CH 23NC1945 19AP1946 0.01293 ) 0.00320 ) (46917 (46924 CH CH "CH 0 E B 5 5 6 12JA1946 10MY1946 JA1947 14KY1964 16MY1964 5JN1964 C.C1275 ) 0.00141 ! (46923 (46922 CH CH E 2 B 3 22N01546 21AU1947 16MY1964 18JN1964 0.01748 ) 0.00242 ) CH 0 2 20DE1946 14MY1964 0.00555 ) 0.00389 ) (46905 ( 1229 C.CC981 ) C.C1057 ) ( 1230 ( 1234 O.0C296 ) ( 0.00281 ) 1231 1235 E C 3 7 16MY1964 16JN1964 C. 00489 ) 0.00282 1 ( 1232 ( 1439 0.03131 I C.CC400 ) ( 1237 ( 1244 C 2 F 1 D 5 F 3 C 2 E 2 8JN1964 11JM564 15JL1964 6JL1964 10AU1964 l'5AU1964 0.00258 1 0.05811 ) 1238 1245 0 F 3 2 11JN1964 11JN1964 C. 00200 I 0.06224 1 ( 1240 ( 1246 0 F F C" 6 3 2 1 10JN1964 11JN1964 6JL1964 10AU1964 C. 00307 1 C.C5379 ) ( 1255 ( 1260 0.00257 ) 0.01146 ) 0.00224 ) 0.04924 ) 1258 1442 f B 1 6 6JL1964 2AU1964 0.01180 ) 0.00341 ) ( 1259 ( 1264 C.C4028 ) C.CC579 ) ( 1265 ( 1268 1266 1269 0 E 3 3 18AU1964 15AU1964 1.22773 ) 0.57556 J ( 1267 ( 12 70 D F 6 1 18AU1964 10AL1964 0.00649 ) C. 14159 ) ( 1272 C 1 D 2 0 6 E 3 E 6 F 3 10SE1964 17SE1964 18SE1964 16SE1964 17SE1S64 15SE1964 0.63211 ) 0.45158 ) 0.41508 ) 1.19295 ) 1273 1276 1279 1282 C 0 E E F B 2 3 1 4 1 3 10SE1964 18SE1964 0.30647 ) C. 08941 ) ( 1274 1 12 77 ( 1280 ( 1283 ( 1286 ( 1289 0 0 E E F C 1 4 2 5 2 7 17SE1964 ieSE1964 16SE1964 16SE1964 15SE1964 140C1964 0.32844 I C. 05577 ) ( 1278 ( 1281 16SE1964 16SE1964 15SE1964 150C1964 0.65968 ) 2.32687 ) 4.89197 ) C. 01306 ) C. 95309 ) 3.43263 ) < 1284 I 1287 2.44654 1 1.92654 ) 1285 1288 2.68170 ) C. 01759 1 ( 1290 C 1 D 2 D 5 E 2 E 5 F 2 160C1964 150C1964 140C1964 120C1964 130C1964 110C1964 0.05306 ) 0.08018 ) 0.03541 ) 0.43984 I 1291 1294 C D 2 3 160C1964 150C1964 C. 01957 I 0.46148 ). ( 1292 I 1295 0 0 1 4 150C1964 150C1964 120C1964 13GC1964 110C1964 N01964 0.07454 ) C. 83244 ) ( 1296 1-1299 .. ( 1302 1297 1300 D E 6 i 140C1964 130C1964 130C1964 110C1964 0.02666 ) 1.08824 ) 1.08026 ) 2.23128 ) ( 1298 ( 1301 E E 1 4 C. 13195 ) 4.63658 ) 8.21929 ) 0.72456 ) 13C3 13C6 E F 6 ■a ( 1304 ( 1307 F B 1 6 1.72874 ) 0.01443 ) I 1308 C 7 6N01964 8N01964 9NU1964 6N01964 7N01964 6N01S64 0.006C8 ) 0.01290 ) 0.08038 ) 0.04021 1 0.34747 ) 0.63415 ) 1309 1312 C 0 1 2 . 10N01964 8N01964 0.02412 ) 0.02483 1 ( 1310 ( 1313 D C E 2 3 6 3 10N01964 9N01964 9IVC1964 7N01964 C.C2041 ) C.C9459 ) ( 1314 ( 1317 ( 1320 ( 1323 D 4 ___ E_L_.. E 4 F 1 1315 1318 1321 1324 0 E 5 2 9N01964 7N01964 C.C1820 ) 0.17313 ) ( 1316 ( 1319 C.C5289 ) C. 91640 1 E F 5 2 7N01964 6N01964 C.5363C I 0.42392 ) ( 1322 ( 1325 E F 6 3 7N01964 6N01964 C. 58320 ) C.61714 ) ( 1337 L_1340 C 3 C 7 2MR1967 28MR1967 0.00147 ) 0.00073 ) 1338 1341 C A 3 3 28MR1967 19AP1967 0.00264 ) 0.00108 ) ( 1339 ( 1345 C C 5 5 28MR1S67 25AP1967 C. 00624 ) C.CC195 ) ( 1346 (_13JZ4 1 1411 ( 1512 C 7 21AP1967 7MY1967 31MY1967 1SE1967 0.00267 I 0.00299 ) 0.0041C 1 0.00785 ) 1369 1375 1449 1536 A E C E 4 3 4MY1967 7MY1967 0.00373 ) 0.00481 1 ( 1373 ( 1410 C A 7 6 5HY1967 24MY1967 C. 00285 ) C.CC564 ) C 3 E 3 3 2 16JL1967 24SE1967 0.00382 ! 0.00545 1 ( 1504 ( 1537 A E 3 3 28AU1967 24SE1967 0.04444 ) C. 03019 ) ( 1538 ...» .1543 ( 1381 1.13S4_ ( 1387 E 5 E 5 GS 5 23SE1967 100C1967 10MY1967 10MY1967 0.09943 ) 0.00718 ) 1541 1379 E GS 2 3 110C1967 9MY1967 0.00532 1 C. 00928 1 ( 1542 ( 1380 E GS 3 4 110C1967 9MY1967 C. 35598 ) C. 10762 ) 0.00716 ) 0.02773 ) 1382 1385 GS GS 6 9 10PY1967 10KY1967 0.03053 ) C. 00706 ) ( 1383 ( 1386 GS 7 CS10 10HY1967 12HY1967 C. 04544 ) C. 01724 ) GS11 GS14 12MY1S67 12MY1967 0.07129 I 0.05285 ) 1388 1391 GS12 GS15 12MY1967 12CY1967 0.02413 J C. 01915 ) ( 1389 ( 1392 GS13 GS16 12MY1967 12MY1S67 C. 01805 ) C.C4623 ) I 1393 ( 13_9B ( 1556 .. ( 15S9 < 1562 GS17 GS22 GS 3 GS 7 GS10 13MY1967 0.00822 ) C. 00304 ) 1394 1554 GS18 GS 1 13MY1967 30C1967 0. 01204 ) C. 02491 ) ( 1395 ( 1555 GS19 GS 2 13MY1967 30C19 6 7 C. 00587 ) C. 38489 ) 30C1967 40C1967 50C196 7 0.36502 ) 1.22403 ) 1557 1560 GS GS 4 8 30C1967 40C1967 1.70030 ) 1.98366 ) ( 1558 ( 1561 GS GS 5 9 40C1967 40C1967 1.8C355 ) 0.59870 ) 0.10115 ) 1563 GS11 GS14 50C1967 50C1967 C. 16368 ) r. 77050 1 ( 1564 ( 1567 GS12 C-S15 50C1967 50C196 1 C. 25512 ) C. 31754 ) ( 1568 ( 1571 ( 1575 GS16 GS19 GS28 50C1967 60C196 7 60C1967 0.01876 1 0.00117 ) 1569 1573 GS17 GS21 50C1967 60C1967 0.13973 ) C. 00112 ) ( 1570 1 1574 GS18 GS22 50X1967 6DC1967 C.C6942 ) C.C1438 J 0.00129 1 C. 93189 ) 1522 ( 1551 BH ES 1 1 18SE1967 50C1967 0.00365 ) C. 17573 I ( 1548 ( 1553 CA SG 1 1 3DC1967 6CC1967 0.86503 ) C.C1469 I t 1428 MU 2 29MY1967 0.00301 1 0.00661 ) ( 1426 ( 1399 MS PM 2 2 29MY1967 5MY1967 C. 01050 ) C.C0680 1 ( 1418 ( 1402 SH TR 2 2 22MY1967 6KY1967 C.C1555 ) 0.005.41 ) 1 1352 KW 2 21AP1967 0.00859 ) 0.04515 ) ( 1403 ( 1407 CA SM 2 2 10MY1967 14MY1967 0.23539 ) 0.01791 ) ( 1404 ( 1420 HO IH 2 2 10MY1967 23KY1967 C.C5081 ) 0.01511 ) ( 1422 GA 2 23MY1967 0.00511 1 ( 1423 WA 2 25HY1967 0.00428 ) Cyclotella -pseudo stelligeva Hust. Cyalotella pseudostelligera Hustedt in: 16(2) :397, fig. 485. 1942. Huber-Pestalozzi, Binnengew. Cells cylindrical with slightly concentrically undulate valves. Speci- mens from Lake Michigan 5-9y in diameter. Cells always occur singly. Mar- ginal zone narrow, usually less than one-half the radius of the valve. Orna- mentation of the marginal zone consists of fine radial striae, without visible substructure, about 18 in lOu at the margin of the valve and a .marginal co- 44 rona of short, stout spines with somewhat expanded bases. The central area of the valve is ornamented with a stellate group of short striae radiating around a central puncta. In occasional specimens the ornamentation of the central area is poorly developed or lacking. In most specimens a distinct, structureless, hyaline space separates the two areas of ornamentation on the valve surface. With the exception of the marginal spines, the morphologic characteris- tics of this species are quite similar to C. stellvgera. The structures of the frustule of C. Tpseudostell-tgeva axe somewhat finer and its distribution tends to be more restricted than C. stelli-geva. It is abundant only in eu- trophied inshore waters and in estuaries of the main lake. 129 CVPSTELL TCI NO OF STATIONS 156 (46915 J 46905 CH CH 20FE1946 JA1947 0.01707 ) 0.00123 ) 46S23 46506 Ch CH 22N01946 MY1947 0.01093 ) 0.01394 1 46920 469C7 CH CH 20DE1946 JL1947 C.0C031 ) C. 00247 ) (46913 (46764 CH EV 6AU1947 17JL1937 C. 01046 ) 0.06446 ) 46922 46757 CH EV 21AU1947 25JL1937 C. 47253 ) 0.29849 ) 46771 46747 EV EV 11JN1S37 1AU1937 C.0C238 ) C. 01238 ) (46763 ( 46744 EV EV 23AU1937 60C1937 C. 02029 ) 0.00488 ) 46765 46767 EV EV 30AU1937 270C1937 0.13943 ) C. 00774 I 46760 46768 EV EV 6 22SE1937 16MR1538 C. 02462 ) C.C1470 ) (46756 ( 1439 EV 8 6 27AP1938 5JN1964 0.00504 ) 0.01399 1 46759 1440 EV B 6 19MY1938 11JL1964 0.00675 1 0.03317 ) 46761 1441 EV B 27MY1538 24JL1964 C.0C545 ) C. 01542 ) ( 1250 I 1255 C 0 6 5 10JL1964 1-5JL1964 0.00411 1 0.01540 ) 1252 1256 C E 1 2 16JL1964 14JL1964 0.00279 ) 0.00183 ) 1254 1257 C E 2 3 15JL1964 14JL1964 C. 00383 ) 0. 00479 ) ( 1258 I.J442. F _ B. C E_ C 0 1 6 2 2 2 6 6J11964 2AU1964 10AU1964 15AU1964 10SE1964 18SE1964 0.C1180 ) 0.00682 ) 1259 1443 F 8 2 e 6JC1964 16AU1964 0.00310 ) 0.00395 I 1262 1264 B C 0 F 0 E 3 1 6 1 4 2 17AU1564 10AU1964 18AU1964 10AU1964 18SE1964 16SE1964 C.CC210 ) 0.OC193 ) ( 1265 -_I IZbi 0.01118 ) 0.21064 ) 1266 1269 C E 3 3 18AU1964 15AU1964 1.47327 ) C. 04933 ) 1267 1270 C.CC432 ) 0.02178 ) ( 1273 ( 1278 C. 02688 ) 0.0C384 1 1275 1279 0 E 2 1 17SE1964 16SE1964 0.02580 ) 0.00785 ) 1277 1280 C. 01859 ) 0.0C6S1 ) ( 1281 I 1284 E E 3 6 16SE1964 17SE1964 0.02355 ) 0.00318 I 1282 1285 E F 4 1 16SE1S64 15SE1964 0.02216 ) C. 08153 ) 1283 1287 E F 5 3 16SE1964 15SE1964 0.CC613 ) C. 03002 ) ( 1288 1 ...129.1 _ B __CJ 3 2 150C1964 160C1964 0.00435 ) 0.00489 ) 1445 1292 1296 1299 E a c E 6 1 5 2 14CC1964 150C1964 0.00652 ) C. 00745 ) 1289 1293 C 0 7 2 140C1964 150C1964 C.C1319 ) C. 01415 ) ( 1295 ( 1298 D E 4 I 150C1964 120C1564 0.02973 I 0.01346 1 14CC1S64 120C1964 C. 01180 ) 0.02199 I 1297 1300 D E 6 3 14DC1964 130C1964 0.CC381 ) C. 05012 ) I 1301 1 1305 E _.E C 0 4 2 7 1 13CC1964 _U0CX964 6NQ1964 8N01964 0.06182 ) 0.01380 ) 0.00912 1 0.00774 ) 1302 1306 1309 1312 1315 1318 E F C- D K 3 1 2 13CC1964 110C1964 0.0O81O 1 0.01386 ) 1304 1307 F B 1 6 110C1964 N01964 0.00741 ) C.CC722 1 ( 1308 . _(__U1J 10N01964 8N01964 0.01126 ) C. 02483 ) 1310 1313 C* D 2 3 10N01964 9NC1964 C.C2041 ) C. 02703 ) ( 1314 ( 1317 D E 4 1 9N01S64 6N01964 0.01148 ) 0.01340 ) 0 E 5 2 9N01964 7N01964 0.01365 ) C.02663 ) 1316 1319 0 E 6 3 9N01964 7N01964 C.C1889 ) 0.C8117 ) ( 1320 I 1323 E _F_ 4 1 7N01964 6N01964 0.15305 I 0.01115 1 1321 1324 E F 5 2 7NQ1964 6N01964 0.04469 ) C. 01398 1 1322 1325 E F 6 7NC1964 6NC1564 28MR1967 19AP1967 C.C1OO0 ) C. 00252 ) ( 1336 I 13ACL. C _£_ A F A . _A_ 3 7 6 2 3 3 27JA1967 28MRL967 19AP1967 23AP1967 23KY1967 11JL1967 0.00385 ) 0.01018 1 0.00069 I 0.00813 I 0.00447 1 0.00489 1 1337 1341 1345 1348 1416 1447 C A C E E A 2 3 2MR1967 19AP1S67 0.00588 ) 0.00542 ) 1338 1342 C A 3 4 C.CC926 1 C.0C902 ) ( 1343 ( n*i ( 1408 1 1446 5 5 4 25AP1967 23AP1967 28MY1967 11JL1967 0.00195 ) 0.01234 1 C. 01093 ) 0.00936 ) 1346 1374 1437 1449 C E E C 7 2 3 3 21AP1967 7MY1967 15JN1967 16JL1967 C. 22432 ) C.0C299 ) C.CC269 ) C. 11082 ) ( 1450 ..1.1*53. C El 5 3 16JL1967 15JL1967 0.29135 ) 0.01517 ) 1451 1454 C E 7 5 16JL1967 15JU967 0.00591 ) CO 1000 ) 1452 1508 E C 2 3 14JL1967 2SE1967 C.C7664 ) 0.00400 ) ( 1509 ( 1513 C 5 5 2SE1S67 31AU1967 0.00505 ) 0.00507 1 1511 1532 E A 2 3 1SE1967 18SE1967 C. 04604 ) 0.00657 ) 1512 1533 E A 3 4 1SE1967 19SE1967 C. 01571 I C. 00928 ) ( 1534 ( 1540 A C 6 5 19SE1967 40C1967 0.00310 ) 0.00993 ) 1536 1541 E E 2 2 24SE1967 U0C1967 0.01363 I 0.06918 ) 15 38 1542 E E 5 3 23SE1967 110C1967 C. 01105 ) C. 04068 ) ( 1543 ( 1394 E 5 GSJ.3-- 100C1967 13MY1967 0.02873 ) 0.00172 ) 1380 1555 GS GS 4 2 9MY1967 30C1967 0.00168 ) C. 01059 ) 1384 1557 GS GS 8 4 10MY1967 30C1967 C. 00185 ) C. 00374 ) ( 1561 ( 1544 GS 9 1 40C1567 20C1967 0.00587 ) 0.00715 1 1562 1547 GS10 MS 1 5CC1967 20C1967 0.00247 1 0.00798 ) 1573 1521 CS, SH HO ► 0 !1 1 1 1 1 2 60C1967 18SE1967 20SE1967 40C1967 50C1967 21AP1967 C.CC112 ) ( 1522 ( 1529 BH KW 1 1 18SE1967 2CSE1967 0.11670 ) 0.02396 ) 1523 1545 RA 1 1 19SE1967 20C1967 0.13838 ) C. 02 027 I 1526 1549 C. 00569 ) C. 06852 1 ( 1551 1 1428 ES 1 2 50C1967 29MY1967 0.00799 1 0.01507 I 1552 1426 SM MS 1 2 60C1967 29HY1967 0.00660 1 0.02100 1 1550 1351 PR CI 0.44604 ) 0.02463 ) ( 1417 ( 135? HO KM 2 2 22MY1967 21AP1967 0.71781 ) 0.02577 1 1350 1403 3H CA 2 2 19AP1967 10KY1967 0.25770 1 0.03923 ) 1400 1349 SB CI 2 2 6MY1967 19AP1967 C. 20848 ) C. 00359 ) Cyolotella stellvgeva (Cleve and Grun.) y. R. Cyolotella meneghiniana var,? -stelligeva Cleve and Grun., Kongl. Sven. Vet.-Akad. Handl., 18(5): 22, pi. 5, fig. 63. 1881. Cyolotella stelligeva (Cleve and Grun.) V. H.„ Syn. Diat. Belgique, pi. 94, fig. 22-27. 1882. 45 Cells cylindrical with slightly concentrically undulate valves. Cells always occur singly. Specimens from Lake Michigan 3-24u in diameter. Mar- ginal zone narrow, only about one-fourth the radius of the valve. Ornamen- tation of the marginal zone composed of striae without visible substructure. Striae quite coarse, about 11-14 in lOu, all of approximately equal length. Other structures, such as ribs, chambers, or slime pores are lacking. Or- namentation of the central area is quite variable. Usually a single large puncta is present in the center of the valve. A number of irregular ribs radiate around the center giving a stellate central structure. Smaller, isolated puncta or thickenings may occur between the major structures. In the smaller cells this entire central ornamentation is reduced to a stellate cluster of dots. In some specimens the entire central area is covered by very fine puncta which may be either radially or randomly distributed. 130 CVSTELU TCT NO OF STATIONS l«!i (46764 _<46763„ (4675 2 (46744 (46768 (4675 9 EV EV EV EV EV EV (60973 CH 1876 0.11809 ) ( 3541 CH ~.. 19FE1881 C.C1132 ) (46910 (46917 CH CH 0C1945 12JA1946 0.02294 ) 0.00582 ) (46921 (46515 CH CH 23N01945 20FE1946 0.01229 1 0.15364 ) (46908 (46914 CH CH DE1945 19AP1946 C.04028 ) C. 01815 ) (46924 (46905 CH CH 10MY1946 JA1947 0.00564 ) 0.02206 ) (46S23 (46909 CH CH 22N01946 MR1947 0.06775 1 0.07286 ) (46920 (46912 CH CH 20DE1946 AP1947 C.C0893 ) C. 01150 ) (46916 (46907 CH CH 4MY1947 JL1947 0.00238 1 0.00296 ) (469C6 (46922 CH CH HY1947 21AU1947 0.04779 1 8.91503 ) (46919 (46758 CH EV 5JN1947 5JN1937 C. 12291 ) C.C1070 ) 17JL1937 23AU1937 0.02417 ) 0.71023 ) (46757 (46765 EV EV 25JL1937 30AU1937 0.08184 ) 0.68600 ) (46747 (46769 EV EV 1AU1937 7SE1937 15SE1937 60C1937 0.10884 ) 0.1C730 1 1-6KR1S38 19HY1938 0.04410 ) 0.0C338 ) (46760 (46767 (46762 (46761 EV EV 22SE1937 270C1937 0.03939 ) 0.01160 ) (46750 (46749 C. 21784 ) C. 06513 ) EV EV EV EV 18HR1938 27HY1938 C, 22056 ) 0.00818 ) (46756 ( 1226 EV C 7 24SE1937 12HR1938 27AP1938 16HY1964 C.06127 ) ^i07282_ ) C.0C336 ) C.C0381 ) ( 1228 _1_1232_ ( 1250 I 1257 ( 1404 J_J4J>3_ D 2 E 5 C 6 _E_3_ HO 2 JSA„2_ 14MY1964 16HV1964 0.00779 ) 0.00174 ) ( 1229 ( 1236 D 5 C 1 14HY1964 8JN1964 0.00423 ) 0.00175 I ( 1231 ( 1237 E 3 C 2 10JL1964 14JL1964 0.00822 ) 0.00957 ) ( 1255 (_ 1 2 5 8 C 5 F 1 15JL1964 6JL1964 0.00513 ) 0.00236 ) ( 1256 (1260 E 2 F 3 16MY1964 8JN1964 14JL1964 6JL1964 C.C1223 ) _C. 00258 )_ C.C0183 ) C.CC955 ) ( 1265 ( 1273 c< 2 2 10AU1964 1CSE1964 0.00224 ) 0.01613 ) ( 1444 ( 1275 B C 6 2 19SE1964 17SE1964 0.02122 ) 0.01290 ) ( 1272 ( 1276 C 0 1 3 10SE1964 18SE1964 0.05336 ) C.C1118 ) ( 1279 i 1287 E F 1 3 16SE1964 15SE1964 0.01571 ) 0.02502 ) ( 1280 ( 1445 E 6 2 6 16SE1964 140C1964 0.00681 ) 0.00326 ) ( 1286 < 1338 F C 2 3 15SE1964 28HR196? 0.02189 ) C.0C529 ) ( 1339 L 1343 C A E E 5 6 2 2 28MR1967 19AP1967 23AP1967 7HY1967 0.00312 1 0.00139 ) 0.00325 ) 0.00598 ) ( 1340 ( 1344 C C 7 3 28MU967 25AP1967 0.00145 ) 0.00331 1 ( 1342 ( 1346 A C 4 7 19AP1967 21AP1967 C.0C361 ) C.0C668 ) ( 1347 ( 1374 ( 1348 ( 1376 E E 5 5 23AP1967 6HY1967 0.00685 ) C. 00281 ) ( 1373 ( 1408 C A 7 3 5HY1967 23HY1967 C.0C285 ) C.CC447 I * 1433 ( 1449 C C 3 3 17JN1967 16JL1967 0.00646 1 0.00764 ) ( 1446 ( 1450 A C 3 5 11JL1967 16JL1967 0.00245 ) 0.00190 ) ( 1447 1 1451 A C 4 7 11JL1967 16JL1967 C. 01170 ) C.CC591 ) ( 1452 ( 1504 E A 2 3 14JL1967 28AU1967 0.01490 1 0.0C247 I ( 1453 ( 1509 E C 3 5 15JL1967 2SE1967 0.01264 ) C. 00505 ) ( 1454 ( 1511 E E 5 2 15JL1967 1SE1967 0.00400 ) 0.C1535 ) ( 1512 ( 1533 E A 3 4 1SE1967 19SE1967 0.01178 ) 0.00464 ) ( 1513 ( 1539 E C 5 31AU1967 40C1967 0.00507 ) 0.01510 ) ( 1532 ( 1541 A E 3 2 18SE1967 110C1967 C.CC986 ) C. 01064 ) ( 1542 ( 1383 E _SS_ GS GS 3 7 3 8 11DC1967 10MY1967 30C1967 40C1967 C. 01017 1 0.0C267 ) ( 1543 ( 1554 E GS 5 1 100C1967 30C1967 0.00718 ) 0.00712 ) ( 1382 ( 1555 CS GS 6 2 10MY1967 3GC1967 C.CC278 ) C.CC353 ) ( 1556 I 1560 0.01564 ) 0.00472 } ( 1558 ( 1562 GS 5 GS10 40C1967 50C1967 C. 00396 ) 0.00740 ) 1 1559 ( 1570 GS 7 GS18 40C196 7 50C1967 C. 01049 ) C.CC992 1 ( 1571 ( 1546 GS19 1U 1 60C1967 20C1967 0.00059 ) 0.01000 1 ( 1574 ( 1527 GS22 TR 1 60C1967 20SE1967 0.00575 ) 0.01258 ) ( 1524 ( 1545 ► I ML 1 1 20SE1967 20C196 7 C. 02189 ) C.0C676 ) ( 1550 J 1400 HR SB 1 2 50C1967 6MY1967 0.06195 ) 0.01191 ) ( 1351 ( 1352 HI KW 2 2 21AP1967 21AP1967 0.02793 ) 0.06013 ) ( 1399 ( 1403 PU CA 2 2 5MY1967 10MY1967 C.C1360 ) C. 03923 ) 10MY1967 25MY1967 0.01270 ) 0.00428 1 12HY1967 0.00645 ) Cyolotella temperei M. Per. and H£rib. Cyclotella tempered. M. Peragallo and H§ribaud in: Hgribaud, Foss. Diat. Auvergne, Vol. I, p. 35, pi. 8, fig. 23. 1902. Cells cylindrical, surface of the valves flat or only slightly concave. Cells occur singly. Specimens from Lake Michigan 8-12y in diameter. Mar- ginal zone of the valves very broad about. three-fourths the diameter of the valve. Ornamentation of the marginal zone consists of anastomosing striae of varying length, somewhat sinuous and without visible substructure. The longest of the striae are of equal length, forming an even border to the central area. A series of marginal spines are present. Striae 14-18 in lOy at the margin of the valve. Spines widely but regularly spaced, about 4 in lOu. The central area is small and circular. Its only ornamentation is a rosette of quite small but conspicuous puncta surrounding the center of the valve . 46 Specimens of this species are very rare in collections from Lake Michi- gan. It was originally described from fossil material and it is entirely possible that the specimens we have observed are not: of recent origin. It is also possible that this species belongs to the group of "pleistocene relicts" that survive in benthic communities in relatively deep water in the upper Great Lakes. The only other taxon found in Lake Michigan that resembles C. tempevei in morphology is C. wolteveoki. Hust. Although Hustedt (1942) points this out in his discussion of C. wolteveoki, he does not alude to Cladogvanma oebuense Grun. , which, although larger and more coarsely structured, is remarkably similar to the two entities discussed above in structure and which, like C. wolteveoki, was described from the western Pacific Islands. 132 CYTEHPER TCT NO OF STATIONS ( 1544 MU 1 20C1967 0.00238 ) 1 1522 BH 1 18SE1967 1.60464 ) < 1550 m i 50C1967 0.39648 ) I 1350 ( 1427 BH 2 GA 2 19AP1967 23MY1967 1.23345 ) 0.00511 ) ( 1400 ( SB 2 6MY1967 0.00596 ) ( 1353 PR 2 23AP1967 C. 01055 ) Cyalotella wolteveoki Hust. Cyalotella wolteveoki Hustedt, Internat. Rev. Hydrobiol., 42;16, text fig. 11-13. 1942. Cells cylindrical with slightly concentrically undulate valves, usually sunken in. the center. Cells occur singly. Specimens from Lake Michigan 4-9u in diameter. The main visible ornamentation on the valve surface is a series of radiate striae of varying lengths and without visible substructure. The longest of these striae reach nearly to the center of the valve so that the central area is reduced to a small, circular area only l-2u in diameter. This area usually contains a single, large puncta. The striae are fine, about 22 in lOu at the margin of the valve, and somewhat difficult to resolve to the thinness of the valve and to their highly irregular length. A series of more or less well developed spines, with thickened and expanded bases, are usually visible at the margin of the valves. The spines are randomly arranged and appear to have no special orientation to the striae or to one another. This species, like C. atomus Hust., was originally described from the tropics. Although this distribution is quite unusual, the forms from Lake Michigan appear to be morphologically identical with the specimens described and figured by Hustedt (1. c). Indeed the morphology of this taxon is al- most unique. The only species that resembles it in general structure of the valve and arrangement of ornamentation is C. tempevei, which, according to published descriptions and illustrations, is a considerably larger and more coarsely structured form. __13J_£ YW0I.TER TCT NC Cf STATIONS 4 < 1243 E 6 13JM964 0.00416 ) ( 1446 A 3 11JL196? 0.00245 ) ( 1557 GS 4 30C1967 C.0C374 ) Species inoevtae sedis Cyalotella sp. #1. 134 CYSPEC0A TCT NC CF STAT1CNS 47 CycZoteXIa sp. #2. 135 CYSPECOB TOT NO OF STATIONS 10 ( 1284 E 6 1 1321 E 5 17SE1964 7NG1964 0.00953 ) 0.00638 ) ( 1285 1 1322 F 1 E 6 15SE1964 7N01564 C. 01165 1 0.01666 ) < 1320 1 1323 E 4 f 1 7N01964 6N01964 24SE1967 C.CC827 ) C. 00279 1 ( 1324 F 2 < 1541 E 2 6N01964 110C1967 0.01165 1 0.01597 ) ( 1325 ( F 3 6N01964 0.00504 ) ( 1536 E 2 C.0C273 ) Cyolotella sp. (aff. C. striata var. bvpunotata Fricke) . Oil CYSTRIVB TCT NO OF STATIONS 10JN1964 0.00920 ) ( 1243 E 6 13JN1964 0.00209 ) < 1504 48 Genus Cymatopleura Wm. Smith Wm. Smith, Annals Mag. Nat. Hist., 7(2): 13. 1851. Freshwater members of the genus Cymatopleura find their primary habi- tat in epipelic communities. They are, however, also successful faculta- tive planktonts and occur in low to moderate numbers in plankton collections. Cymatopleura cochlea J. Brun. Cymatopleura cochlea J. Brun, Mem. Soc. Phys. Hist. Nat. Geneve, 31:25, pi. 276, fig. 6. 1911. 136 CTCDCHLE TCT NO OF STATIONS 16 I 3541_ CH 1FE1881 0.01956 1 (46917 CH 12JA1946 0.00055 ) (46914 CH 19AP1946 C. 00107 1 (46916 (46763 CH 4MY1947 EV 23AU1937 0.00034 ) C. 02029 ) (46922 (46752 CH EV 21AU1947 15SE1937 0.00194 ) C. 02177 ) (46764 (46767 EV EV 17JL1937 27GC1937 C.CC806 ) C.CC387 ) (46762 ( 1395 EV 18MR1938 GS19 13MY1967 0.08822 I 0.00117 I I 1391 ( 1396 GS15 GS20 12MY1967 13MY1967 0.00479 ) C. 00074 ) ( 1394 ( 1568 GS16 CS16 13MY1967 50C1967 C.CC172 ) C.CC433 ) 50C1967 0.00149 ) Cymatopleura elliptica (Brgb. and Godey) Wm. Smith Surirella elliptica de Brdbisson and Godey, Cons id. Diat., p. .,17. 1838. Cymatopleura elliptica (Br£b. and Godey) Win. Smith, Annals Mag. Nat. Hist.. Ser. 2, 7:13, pi. 7, fig. 10-11. 1851. 137 CTELLIPT TCT NO OF STATIONS (46758 (46747 EV 5JN1937 1AU1937 0.0C357 I 0.00495 1 (46743 _.(46765_ EV EV 20JN1937 30AU1937 C. 00856 ) 0.00558 ) (46757 ( Cymatopleura solea (Brgb. and Godey) Wm. Smith Cymhella solea de Br£bisson and Godey, Mem. Soc. Acad. Sci. Falaise, 1:51, pi, 7. 1835. Cymatopleura solea (Breib. and Godey) Wm. Smith, Annals Mag. Nat. Hist., Ser. 2, 7:12, pi. 3, figs. 8-9. 1851. 138 CTSOLEA TOT NO OF STATIONS 144 (60973 ( 3507 CH (46917 CH (46923 (469J03_ (46919 __L4625L (46764 (46765 (46750 (46767 (46762 (46759 ( 1225 1 1230 ( 1233 -1_12J:S_ I 1243 _LJ246_ ( 12 54 ( 1260 ( 1304 _L1323_ ( 1339 J_1343_ 1433 ( 1437 ( 1453 -1_1.38_0_ ( 1384 ( 1 3R9 CH CH CH _£¥_ EV _EV_. EV EV EV EV C 6 E 2 B 3 ._B^3_ E 6 F 3 D 2 F 3 F 1 F 1 C 5 _A_6_ ( 1346 C 7 ( 1368 A3 C 5 _E_3_ ( 1372 (-1375 ( 1411 C 3 _1_14 1 4 E_2_ ( C 3 E 3 E 3 _GS_4_ GS 8 GS13 19FE1881 12JA1946 O.02264 ) 0.01275 ) 22N01946 MR1947 0.15736 ) 0.02277 > (46910 (46514 5JN1947 5JN1937 0.01214 ) 0.03923 1 (46920 146916 (469C7 (46743 17JL1937 30AU1937 24SE1937 270C1937 0.05641 > 0.01673 I 18MR1938 19PY1938 0.01414 I 0.00774 ) (46757 [46752 (46 744 (46749 0.08822 ) 0.0C675 ) . 15MY1964 I6KY1964 0.0C392 ) 0.00593 ) (46751 (46761 5JN2964 11JN1964 C. 00238 ) _0.00400 ) ( 1228 ( 1231 13JN1964 11JN1964 I 1439 I_1241 0.00209 ! 0.01195 ) 15JL1964 6JL1564 0.00383 ) 0.00191 ) ( 1244 ( 1248 110C1964 6NQ1964 28MR1967 19AP1967 0.00741 ) 0.00139 ) ( 1257 < 1269 ( 13C7 ( 1325 21AP1967 4MY1967 0.00624 ) 0.00466 ) ( 1340 ( 1344 0.00134 ) C. 02828 I 5XY1967 _7HY1S6_7 0.01419 I _0j0JL203 ) ( 1347 ( 1370 ( 1373 _J_1376_ 15JL1967 9MY1967_ 10MY1967 12MY1967 0.00253 ) _0.0_0336^ J_ 0.00924 ) 0.01289 ) ( 1511 1 1381 ( 1387 ( 1390 CH CH CH CH CH EV EV EV EV EV EV EV 0 2 E 3 B 6 E 2 F 1 B 3 E 3 E 3 B 6 F 3 C 7 C 3 t 2 A 6 31MY1967 0. 00410 ) ( 1412 -ZS&iiS&J. _0.0C.336_ ) __(_1416_ 17JN1967 C.0C646 ) ( 1434 15JN1967 0.00538 ) ( 1448 C 7 E 5 C 5 E 5 C 5 A 6 0C1945 19AP1946 20DE1946 4HY1947 0.00546 ) C. 03097 ) JL1947 20JM937 0.01232 ) 0.01561 ) (46921 (46924 25JL1937 15SE1937 0.05375 ) 0.05138 ) (469C5 (469C6 60C1937 12HR1938 0.03852 ) 0.02177 I (46922 (46745 30MR1938 27MY1938 0.00975 ) 0.01214 I (46747 (46760 146748 (46768 14KY1964 16HY1964 0.02233 ) 0.03543 ) 5JN1964 13JN1564 0.00584 ) C. 01223 I (46756 (46766 11JN1964 24JL1964 14JL1964 15AU1964 0.0O20O ) C. 00143 ) ( 12 29 ( 1232 0.00439 ) C. 00197 ) ( 1237 ( 1242 N01964 6N01964 C. 002 39 ) 0.00274 ) ( 1245 ( 1252 28MR1967 25AP1967 C. 00361 ) C. 00252 ) ( 1259 (1285 23AP1967 3MY1967 0.00073 ) C. 00165 ) ( 1313 ( 1338 5MY1967 _>MY1967 0.00325 ) 0.01381 ) 31MY1967 28MY1567 C. 00856 ) 0.00281 ) ( 1342 J_ 1345 ( 1348 " ( 1371 17JN1967 10JL1967 C. 00842 ) 0.00219 1 ( 1374 _(. 1410 E 2 GS 5 GS11 GS14 1SE1967 _10MY1967 0.00598 I 0.00354 ) ( 1413 ( 1432 12HY1967 12MY1967 0.00307 ) 0.00239 ) ( 1436 ( 1449 CH CH CH CH CH EV EV EV EV EV EV EV 0 5 E 5 C 2 E 3 F 2 _C' 1 F 2 F 1 D 3 C 3 i 4 _? 5 E" 5 C 3 23N01945 10MY1946 JA1947 HY1947 C. 04204 ) ,0.22927 ) 21AU1947 3JL1937 C. 01103 I CO 1062 ) 1AU1937 22SE1937 C. 01163 ) C.Q8359 ) C.C2228 ) C. 00985 ) 130C1937 C. 06405 ) 16HR1S3E C.C1470 ) 27AP1938 6.0C504 ')" 140E1938 ^.03169 ) 14MY1964 16MY1964 8JN1964 13JM964 C.CC423 ) C.01391 ) 11JN1964 16JLIS64 6JL1964 15SE1964 9N01964 28MP1967 19AP1967 25AP1967 23AP1967 4HY1967 C.CC516 ) C^CC300 ) C.C1C37 ) C.CC558 ) C.CC310 ) C.CC582 ) E 2 A 6 C 7 A 4 E 2 C 3 7MY1967 24HY1967 25MY1967 _13JN1967 15JM967 16JL1967 C.CC193 ) 0.CC397 ) C.CC180 ) C.C1170 ) C. 00137 ) C.CC693 ) C.CC596 ) ^.01691 ) C.CC632 ) C.C0255 ) C.CC724 ) C. 00382 ) 0.01188 ) 0.02349 I ( 1379 GS 3 9MY1967 C.0C309 ) I 1382 GS 6 10^Y1967 C.C0278 ) ( 1388 GS12 12MY1967 C. 14480 ) ( 1391 GS15 12HY1967 C.C4310 1 49 ( 1392 ( 1395 GS16 GS19 12HY1567 13MY1967 0.01233 ) 0.02114 ) 1393 1396 GS17 GS20 13KY1967 13MY1967 0.02192 ) C. 00074 ) 1394 1397 GS18 CS21 13HY1967 13MY1967 C. 08429 ) C. 00327 ) ( 1566 I 1569 GS14 GS17 5CC1967 50C1967 0.00367 ) 0.01338 ) 1567 1570 GS15 GS18 50C1967 50C1967 C. 00635 ) 0. 00992 ) 1568 1572 GS16 GS20 50C1967 60C1967 C. 00144 ) C.OC090 ) C 1575 «.Jl5_52_. GS28 SM 1 MS 2 BH 2 6CC1967 60C1967 29NY1967 19AP1S67 0.00516 ) 0.01981 ) 1546 1553 LU 1 SG 1 20C1967 60C1967 C. 00500 ) 0.00734 ) 1520 1428 KO 1 *(J 2 18SE1967 29MY1967 C.CC471 ) C. 00301 ) ( 1426 ( 1350 0.C5249 ) 0.00661 I 1351 1401 HI 2 NO 2 21AP1967 6MY1967 C. 00621 ) 0.01176 ) 1417 1402 Ml 2 TR 2 22MY1967 6MY1967 C.C1495 ) C. 01083 ) 1 1400 I _140_3_ SB 2 CA 2 GA 2 6MY1967 10MY1967 23MY1967 0.02383 ) 0.02615 ) 1354 1349 GH 2 CI 2 25AP1967 19AP1967 0.00173 ) 0.00359 ) 1429 1419 WL 2 eu 2 29HY1967 23MY1967 C. 01062 ) C. 05492 ) ( 1422 0.02555 ) 1423 WA 2 25MY1967 0.01713 ) 1424 KN 2 25MY1967 0.01332 ) Cymatopleura solea var. apioulata (Wm. Smith) Ralfs Cymatopleura apioulata Wm. Smith, Syn. British Diat., Vol. 1, p. 37, pi. 10, fig. 79. 1853. Cymatopleura solea var. apioulata (Wm. Smith) Ralfs in: Pritchard, Hist. Infus., p. 793. 1861. 139 CTSOLEVA TCT NC CF STA.'ICNS 39 (60973 146917. CH CH CM CH 1876 12JA1946 JA194 7 21AU1947 0.04724 ) 0.00083 ) 3541 46914 46916 46758 CH CH 1FE1881 19AP1946 C. 00978 1 0.00107 1 (46921 (46924 CH CH 23NC1945 10MY1946 C.0C065 ) 0.00282 ) (46905 (46922 0.00123 ) 0.00048 ) CH EV 4MY1947 5JN1937 0.00136 I C. 01070 1 (469C7 (46743 CH EV JL1547 20JN1937 C.CC247 ) 0.0C856 ) (46744 (46759 EV EV 60C1937 19MY1938 0.0C975 1 O.0C675 ) 46749 1230 EV E 2 12MP.1938 16MY1964 0.01214 ) 0.00296 ) (46751 ( 1289 EV C 7 30HR1938 140C1964 C.C2233 ) 0.CC44C ) ( 1343 1 1405 A 6 A 3 19AP1967 23MY1967 0.00069 ) 0.0C894 I 1345 1414 C 5 E 2 25AP1967 28MY1967 C. 00195 ) 0.00672 ) ( 1376 ( 1415 E 5 E 3 6HY1967 28MY1967 C. 00281 ) C.0C450 ) ( 1432 I 1377 A 4 GS 1 13JN1967 9MY1967 0.00255 I 0.00396 ) 1434 1381 C 5 GS 5 17JN1567 10MY1967 C. 00299 I 0.00239 ) ( 1435 ( 1386 C 7 GS10 13JN1967 12MY1967 C. 00316 ) C. 00287 ) 1 1388 ( 1394 GS12 GS18 12MY1967 13MY1967 0.00603 ) 0.00172 ) 1390 1573 GS14 GS21 12HY1967 60C1967 0.00587 ) C. 00112 ) ( 1391 ( 1550 GS15 PR 1 12HY1967 50C1967 C.CC958 ) C. 01239 ) ( 1395 PU 2 5MY1967 0.C1360 ) 14C1 no 2 6MY1567 0.00588 ) ( 1422 GA 2 23MY1967 C.CC511 ) Cymatopleura solea var. olavata 0. Mull. Cymatopleura solea var. clavata 0. Muller, Bot. Jahrb., 34(1) :22, fig. 1. 1903. 140 CTSCLEVC TCI NO OF STATIONS 1AU1937 0.00248 ) Cymatopleura solea var. regula (Ehr.) Grun. Surirella regula Ehrenberg, Ber. Akad. Wiss. Berlin, 1841:136. 1841. Cymatopleura regula Ralfs in: Pritchard, Hist. Infus., p. 793. 1861. Cymatopleura solea var. regula (Ehr.) Grunow, Verh. Zool.-Bot. Ges. Wien, 12:466. 1862. 141 CTSCLEVR TOT hC CF STATIONS (60973 CH _146 9 19 _ CH 1876 5JN1947 0.11809 ) 0.00303 ) ( 3541 146907 CH CH 1FE1881 0.00978 ) 146914 JU947 0.0O197 1 (46922 CH CH 19AP1946 C.CC107 ) 21AU1947 C. 00048 ) Genus Cymbella Agardh Agardh, Consp. Crit. Diat., p. 1. 1830. Members of the genus Cymbella find their primary habitat in periphyton or epipelic communities. The specimens that occur in our collections are most likely derived from such habitats in most instances. Cymbella acutiuscula Cleve Cymbella aeutiusoula Cleve, K. Svenska Vet. -Akad. Handl., Ny Foljd, 26(2): 164, pi. 4, fig. 26. 1894. Coll: 1404. 50 Cymbella aequalis Wm. Smith. Cymbella aequalis Wm. Smith in: Greville, Annals Mag. Nat. Hist., Ser. 2, 16:255, pi. 9, fig. 4. 1855. 185 CBSPECCE TCT NC GF STATICNS Cymbella af finis Kutz. Cymbella affinis Klitzing, Bacill., p. 80, pi. 6, fig. 15. 1844. _142 CBAI:_ONi.XC3LJ£_£f_iTATICNS__ ( 1569 GS17 . JLJ3 5.0 ..-__BH 2 1 140/ SM 2 (46917 CH 12JA1546 5JN1547 20JN1537 0.00028 ) 0.00152 ) 0.00428 ) (46524 CH 10NY1946 21AU1947 17JL1937 C. 00071 ) (469C6 CH EV EV MY1547 5JIU937"" 25JL1537 C.CC133 ) 146915 (46743 CH EV (46922 (46764 CH EV C. 00046 ) C. 00806 ) (46758 (46757 C. 22110 ) C.CC481 ) (46763 (46750 EV EV F F C GS1 23AU1937 24SE1537 0.02029 ) C.0C943 ) (46769 ( 1229 EV D 5 7SE1937 14KY1964 0.02171 ) 0.00211. ) 0.00346 ) 0.00785 ) (46760 ( 1240 ( 1256 ( 1287 ( 1389 ( 1567 EV 0 6 E 2 F 3 GS13 GS15 22SE1937 10JN1564 14JL1964 155E1964 12MY196 7 50C1967 C.CC492 ) C.CC153 ) ( 1244 _I_12.T& _. 1 1 7 .6 11JN1964 1CAU1964 21AP1967 12KY1967 C.COUO 1 0.00545 ) ( 1245 ( 1279 ( 1388 ( 1565 F 2 E 1 UJN1964 16SE1564 C.CC183 ) C.C0500 ) ( 1346 ( 1392 0.00134 ) 0.00616 ) GS12 GS13 12MY1967 50C1967 0.02413 I C. 01014 ) C.CC258 ) C.C0318 ) 50C1967 0.00297 I I 1571 GS19 60C1967 C. 19AP1967 0_.0C881J ( 14 CI M0__2 6MY 1567__ _Pj. 14NY1567 C. 00597 I ( 14C6 GB 2 13HY1967 " 0. 00176 ) ( 1574 00588 ) (^ JL403 "00270 ) ( GS22 CA 2 60C1967 10MY1967 0C575 ) C3923 I Cymbella amphieephala Naeg. ex Kutz. Cymbella arnphiee-p'hala Naegli ex Kutzing, Sp. Alg., p. 890. 1849. 143 CBAMPHIC TCT NC CF STATICNS ( 46764 fc"\/ 17JL 1937 ~cT 12CY1967 0.00258 I Cymbella angustata (Wm. Smith) Cleve Naviaula angustata Wm. Smith, Syn. British Diat., Vol. I, p. 52, pi. 17, fig. 156. 1853. Cymbella angustata (Wm. Smith) Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 26 (2): 161. 1895. 144 CBANGUST TCT NC OF STATIONS 3 (46764 EV~ 17JL1937 ~C.0C806 > 746757 Fv " 25JL1937 0.00481. ) (46747 EV 1AU1937 C.CC248 ) Cymbella aspeva (Ehr.) Herib. Cooconema aspevum Ehrenberg, Ber. Akad. Wiss. Berlin, 1839:30. 1839. Cymbella aspeva Heribaud, Diat. Auvergne, p. 99, pi. 3, fig. 10. 1893. 145 CEASPERA TCT NC CF STATIONS 3 ( 1512 E 3 1SE1967 0.00393 ) ( 1350 GS14 12MY1967 C. 00587 I ( 1404 K 2 10HY1967 C.C1270 ) Cymbella cesatii- Grun. Cymbella eesatii Grunow in: A. Schmidt, Atlas Diat., pi. 71, figs. 48-49. 1881. 51 146 CBCESATI TCT NO OF STATIONS 14 1244 1258 (46919 (....1246.. _ CH F 3 F 3 GS12 5JN1947 11JN1964 0.00455 ) 0.00596 ) F 1 F 1 11JN1964 6JL1964 0.00219 ) C. 00708 ) 1 1245 ( 1259 F 2 F 2 11JN1964 6JL1964 C.0C346 ) 0.CC31O ) ( 1260 ( 1388 6JL1964 12MY1967 0.00191 ) 0.00603 ) 1285 1390 F 1 GS14 15SE1964 12MY1967 C. 02330 ) 0.00587 ) ( 1305 ( 1394 F 2 GS18 110C1964 13MY1967 C.0C173 ) C.0C172 ) ( 1403 CA 2 10MY1967 0.03923 ) 1404 MC 2 10MY1967 0.02541 ) ( Cymbella oistula (Ehr.) Kirchn. Baoillavia oistula Ehrenberg in: Ehrenberg and Hemprich, Symbolae physicae, Vol. 4, pi. 2(4), fig. 10. 1828. Cymbella oistula (Ehr.) Kirchner in: Cohn, Kryptog.-Fl. Schlesien, Vol. 2, p. 189. 1878. 147 CBCISTUL TCT NO CF STATIONS (46921 (46920 CH CH 23N01945 200E1946 0.00065 ) 0.00092 ) 46?17 46916 CH CH 12JA1946 4MY1947 C.C0C55 ) 0.00034 ) (46914 (469C6 CH CH 19AP1946 MY1947 0.00107 ) C. 00066 I (46919 (46764 CH EV 5JN1947 17JL1937 0.02580 ) 0.01612 ) 46S13 46757 CH EV 6AU1947 25JL1937 C. 02092 ) 0.00963 ) (46922 (46747 CH EV 21AU1947 1AU1937 6JL1964 15SE1964 C.0C097 1 C.0C248 ) (46765 ( 1268 EV E 2 30AU1937 15AU1964 0.0C558 ) 0.00274 ) 1244 1270 F 1 F 1 11JN1964 10AU1964 0.00219 ) 0.00272 ) ( 1258 ( 1285 F 1 F 1 C. 00472 ) C.C4077 i ( 1302 ( 1387 E 5 GS11 130C1964 12MY1S67 0.0C405 ) 0.00792 ) 1382 1388 GS 6 GS12 10WY1967 12MY1967 0.00833 1 0.00603 ) ( 1386 1 1389 GS1C CS13 12MY1967 12MY1967 0.00287 ) C.CC258 ) ( 1392 ( 1557 GS16 GS 4 12MY1967 30C1967 0.00616 ) 0.00374 I 1396 1567 GS20 GS15 13MY1967 50C1967 C. 00074 ) 0.00159 ) ( 1554 ( 1569 GS 1 CS17 KW 1 SG 1 30C1967 50C1967 20SE1967 60C196 7 C.0C356 ) C.CC446 1 ( 1574 ( 1530 GS22 FR 1 60C1967 24SE1967 0.01438 i 0.02000 ) 1524 1550 MI 1 MR 1 20SE1967 50C1967 0.02189 I C. 02478 ) ( 1529 ( 1553 C. 01199 ) C. 01469 ) ( 1426 ( 1404 MS 2 MO 2 GB 2 29MY1967 10MY1967 13MY1S67 C. 02100 ) 0.02541 ) 1350 14C5 BH 2 ES 2 19AP1967 12MY1967 0.00220 1 0.00645 ) ( 1403 ( 1349 CA 2 CI 2 10MY1967 19AP1967 C. 27462 ) C.0C359 ) ( 1406 0.00270 ) Cymbella oistula var. gibbosa J. Brun Cymbella oistula var. gibbosa J. Brun, Diatomiste, Vol. 2, pi. 14, fig. 27. 1895. 148 CBCISTVC 7CT NC OF STATIONS 7 ( 1240 I 13_87_ ( 1403 D 6 GS11 10JN1964 _J.j2fiYl_S.67 10MY1967 0.0C153 ) _0.0J584 _ 0.2876? ) ( 1285 <_1566_ I f r GS14 15SE1964 50C1967 0.01165 I 0.00183 1 (1379 GS 3 (1526 HO 1 9MY1967 20SE1967 C.0C30S ) C.CC569 I Cymbella oistula var. trunoata J. Brum Cymbella oistula var. tvunoata J. Brun, Diat. Alps et Jura, p. 58, pi. 3, fig. 2. 1880. 149 CBCISTVT TCT NO OF STATIONS 1 I 1403 CA 2 1CMY1967 0.02615 1 ( Cymbella cuspidata Kutz. Cymbella cuspidata Kutzing, Bacill., p. 79, pi. 3, fig. 40. 1844. 150 CBC uspio CH EV TOT NC OF STATIONS 14 (46914 (46757 (46917 (46764 12JA1946 0.00055 ) 17JL1937 0.00806 ) Ch EV 19AP1946 25JL1937 0.00107 ) 0.00963 ) (46758 (46747 EV EV 5JN1937 1AU1937 C.0C357 ) C.0C248 ) (46769 (46761 EV EV LU 2 7SE1S37 0.02171 ) 27MY1938 0.00273 ) (46751 ( 1574 EV GS22 30MR1938 60C1967 0.02233 ) 0.00575 ) 0.00220 ) (46759 ( 1527 < 6V TR 1 19MY1938 20SE1967 C.CC338 ) C. 00629 I ( 1427 29MY1967 0.01211 ) ( 1350 BH 2 19AP1967 52 Cymbella ouspidata var. sohulzii A. Cleve Cymbella ouspidata var. sohulzii A. Cleve, Soc. Sci. Fennica Comm. Biol., 4(14) :75. 1934. 152 CBCUSPVS TOT NO CF STATIONS 12CY1967 0.00308 ) Cymbella delioatula Ktttz. Cymbella delicatula KUtzing, Sp. Alg., p. 59. 1849. 153 CBOELICA i TCT NC OF STATIONS 41 (46914 CH 19AP1946 0.00107 ) (46920 CH 20DE1S46 C. 00062 ) (46916 CH 4MY1947 C.C2205 ) 1 469 19 (46758 (46764 (46763 r.H .11 1947 r.nnfi99 1 (469?? CH MAU1947 C.C0145 ) EV 5JN1937 0.0C713 I 0.04835 ) (46743 (46757 EV EV 20JN1937 25JL1937 0.00428 ) 0.02407 1 (46770 (46747 EV EV 9JL1937 1AU1937 C. 01193 ) C.0C248 ) EV 23AU1937 0.10146 ) 0.0147C ) (46752 (46762 EV EV 15SE1937 18MR1938 0.06530 ) C. 02206 1 (46748 ( 1243 EV E t 130C1937 13JN1964 C. 02135 ) C. 00209 ) ( 1244 F 1 11JN1964 0.00658 ) 0.00764 ) ( 1258 ( 127C F F 1 1 6JL1964 10AU1964 0.00944 I 0.00272 ) ( 1259 ( 1285 F F 2 1 6JL1964 15SE1964 0.00310 ) C. 54743 ) ( 1304 F 1 110C1964 0.00494 ) 0.00185 ) ( 1305 ( 1387 F 2 GS11 110C1964 12MY1967 0.00173 ) C. 01980 ) ( 1379 ( 1388 GS 3 GS12 9MY1967 12HY1961 C.0C309 t C.0C603 ) ( 1389 GS13 12MY1S67 0.01289 ) 0.00172 1 ( 1390 ( 1555 GS14 GS 2 12MY1967 3CC1967 0.00587 ) C. 00706 ) ( 1391 ( 1574 C-S15 GS22 12MY1967 60C1967 C.0C479 ) C.0C863 ) ( 1550 MR 1 50C1967 0.01239 ) 0.2353? ) ( 1350 ( 1405 BH ES 2 2 19AP1967 12CY1967 0.00220 ) 0.00645 1 ( 1402 ( 7R 2 6MY1967 C. 00541 ) Cymbella hebridioa (Grun.) Cleve Enayonema hebridioum Grunow in: Cleve and Moller, Diatoms, No. 37. 1877. Cymbella hebridioa (Grun.) Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 26(2) :169. 1895. 154 CBHEBR10 TCT NO OF STATIONS 1 ( 3541 1FE1881 0.00978 ) Cymbella hustedtii Krasske Cymbella hustedtii Krasske, Bot. Arch., 3(4):204, fig. 11. 1923. 155 C8HUSTEP TOT NC CF STATIONS 19_ (46914 CH 19AP1946 0.00107 ! (46919 CH 5JN1947 C. 00607 1 (46764 EV 174L1937 C. 01612 ) 146757 (46768 EV EV 25JL1937 16MR1938 0.00481 ) 0.C1470 ) (46748 ( 1265 EV F 1 130C1937 15SE1964 0.02135 .) 0.10483 1 (46767 ( 1386 EV GS10 270C1937 12HY1967 C.0C774 ) C. 00287 ) ( 1388 GS12 GS13 12KY1967 5CC1967 0.00603 ) 0.01014 ) ( 1557 ( 1569 GS 4 GS17 30C1967 50C1967 0.00374 ) 0.00149 I ( 1563 ( 1574 GS11 GS22 50C1967 60C1967 0.00234 ) C.0C288 ) ( 1527 ( 1404 TR 1 KO 2 20SE1967 10MY1967 0.0C629 ) 0.01270 ) ( 1553 I SG 1 6CC1967 0.00734 ) ( 1403 CA 2 10MY1967 0.01308 ) Cymbella hybvida Grun. Cymbella hybrida Grunow ex Cleve and Moller, Diatoms, No. 161. 1878. 156__. CBHYBRID TCT NC OF STATIONS 4 _ 146921 CH 23NQ1945 0.00065 ) (46747 EV 1AU1937 C.0C248 ) (46751 EV 30WR1938 C.C1117 1 ( 1268 E 2 15AU1964 0.00274 ) I Cymbella inaequalis Ross Cymbella inaequalis Ross, New Phytol., 51(3): 381. 1952. 157 CBINAEOU TCT NC CF STATIONS 53 Cymbella incerta (Grim.) Cleve Cymbella pisciculus var. incerta Grunow in; Cleve and Moller Diatoms No. 96. 1878. ' Cymbella incerta (Grun.) Cleve, K. Svenska Vet. -Akad. Hand 1., Ny Folid. 26(2):170. 1895. 158 CBINCERT TOT NO OF STATIONS 2 I 1270 F 1 1CAU1964 0.00272 ) ( 1388 GS12 12MY1967 C. 02413 I ( Cymbella laevis Naeg. Cymbella laevis Naegeli ex Kiltzlng, Sp. Alg., p. 58. 1849. 159 CELAEVIS TOT NO OF STATIONS 3 (46757 EV 25JL1937 C.0C481 ) ( 1285 F 1 15SE1964 0.00582 ) < 1390 GS14 12MY1967 C.0C587 ) Cymbella lanceolata (Ehr.) Kirchn. Cooeonema lanceolatwn Ehrenberg, Infusionsthierchen, p. 224, pi. 19, fig. 6. 1838. Cymbella lanceolata Kitchner in\ Cohn, Kryptog.-Fl. Schlesien, Vol. 2, p. 188. 1878. 160 CBIANCE0 TOT NO OF STATIONS 3 (46751 EV 30MR1938 0.01117 1 ( 1545 WL 1 20C1967 0.00676 1 ( 1407 SM 2 14MY1967 C. 00597 ) 161 CBLANCEB TOT NO OF STATIONS 1 ( 1285 F~~l 15SE1964 0.00582 ) T Cymbella lata Grun. Cymbella lata Grunow ex Cleve, K. Svenska Vet. -Akad. Handl., Ny Foljd, 26(2) :165, pi. 4, fig. 27. 1894. 162 CBIATA TOT NO OF STATIONS 2 (46747 EV 1AU1937 0.0C248 I ( 1285 F 1 15SE1964 0.00582 ) ( Cymbella latens Krasske Cymbella latens Krasske, Arch. Hydrobiol., 31:43, text fig. p. 53. 1937. 187 CBVENTRO TCT NO OF STATIONS 160973 CH 1876 0.04724 ) 0.0C943 ) 0.C118C ) 46770 46768 1285 EV 9JL1937 0.01193 1 46764 EV 17JL1937 0.04835 ) (46750 ( 1258 EV F 1 24SE1937 6JL1964 EV F 1 16MR1938 15SE1964 0.05880 ) 0.03494 ) 1256 13C8 E 2 C 7 14JL1964 6N01964 C.0C183 ) 0.00304 ) ( 1316 L.15A1 D 6 E 2 9NC1964 110C1967 0.0C378 ) 0.00532 ) 1451 1543 C 7 E 5 16JL1967 10CC1967 0.00197 ) 0.00718 ) 1453 1384 E 3 GS 8 15JL1967 10MY1967 C.0C253 ) C.0C185 ) ( 1387 .. ( 13SJ3- GS11 GS14 12MY1967 12MY1967 0.22180 ) 0.02349 ) 1388 1391 GS12 GS15 12MY1967 12MY1967 C. 00603 I 0.00479 ) 1389 1394 GS13 GS18 12MY1967 13MY1967 C. 02063 ) 0.00172 I 1 1397 ( 157? GS21 6H 1 13MY1967 18SE1967 C. 00065 ) 0.00182 I 1398 1523 GS22 RA 1 14MY1967 19SE1967 C. 00607 ) 0.00923 ) 1574 1526 C-S22 MO 1 60C1967 20SE1967 C.C4315 ) 0.01138 1 ( 1528 I_1549 SB 1 K0 1 m 2 HO 2 M0 2 CA ? 20SE1967 40C1967 29MY1967 22MY1967 6MY1967 10MY1967 0.01444 ) 0.01370 ) 1529 1550 KVi 1 MR 1 20SE1967 50C1967 C. 19187 ) 0.18585 ) 1545 1553 ML 1 SG 1 20C1967 60C1967 C.0C676 ) 0.00734 ) ( 1428 ... ( 1A1Z 0.00603 ) 0.00374 I 1426 1350 MS 2 BH 2 29MY1967 19AP1967 0.C3150 ) C. 05066 ) 14 27 1399 LU 2 FW 2 29MY1967 5MY1967 C. 03632 > ( 1401 ( 1403 0.02352 ) 1.7161f ) 1354 14C4 GH i M0 2 25AP1967 10KY1967 0.00173 ) 0.12703 1 1429 1407 kL 2 29MY1967 C. 04247 ) 1 1406 GB 2 13MY1967 0.00270 ) 54 Cymbelta teptooeros (Ehr.) Rabenh. Coooonema teptooeros Ehrenberg, Ber. Akad. Wiss„ Berlin, 1841:123, pi. 1 (2), fig. 30. 1843. Cymbelta teptooeros (Ehr.) Rabenhorst, Sussw.-Diat., p. 22, pi. 7, fig. 14a. 1853. 163 CBIEPTOC TOT NO OF STATIONS 11JN1964 0.00110 ) ( 1270 F 1 10AU1964 C. 00817 ) ( 1304 110C1964 C.CC247 i Cymbelta teptooeros var. ro strata Hust. Cymbelta teptooeros var. rostrata Hustedt, Arch. Hydrobiol. 39-132 figs. 52-54. 1942. ' ' 164 CBLEPTVR TOT NO OF STATIONS 7 (46748 EV ( 1426 MS 2 130C1937 0.02135 ) 29MY1967 0.01050 ) ( 1387 ( 1350 GS11 BH 2 12MY1967 19AP1967 0.00396 1 0.0022!) ) ( 1389 ( 1403 GS13 CA 2 12MY1967 10MY1967 C. 00258 ) C. 01308 ) ( 1407 SM 2 14MY1S67 0.0C597 ) ( Cymbelta mexioana (Ehr.) Cleve Coooonema mexioanum Ehrenberg, Ber. Akad. Wiss. Berlin, 1844;342. 1844. Cymbelta mexioana (Ehr.) Cleve, K. Svenska Vet. -Akad. Handl., Ny Foljd, 26(2) -.111. 1894. 165 , CBMEXICA TCT NO OF STATIONS (46920 _i_155JL CH MR 1 200E1946 50C1967 0.00031 ) 0.01239 ) ( 1384 ( 1402 GS 8 TR 2 10MY1967 6MV1967 0. 00185 1 0.00541 ) ( 1530 ( 1354 FR 1 CH 2 24SE1967 25AP1967 C.C1000 I C. 00173 ) Cymbelta miorooephata Grun. Cymbelta miorooephata Grunow in: Van Heurck, Syn. Diat. Belgique, p. 63, pi. 8, figs. 36-39. 1885, (60973 CH 1876 0.02362 ) (46910 CH 0C1945 0.00109 1 (46919 CK 5JN1947 C. 02883 ) (46913 CH EV 6AU1947 9JL1937 0.01046 ) 0.0C596 ) (46758 (16764 EV EV 5JN1937 17JL1937 0.00357 ) 0. 00806 ) (46743 (46757 EV EV 20JN1937 25JL1937 C.0C856 ) C.C1926 ) (46747 EV FV 1AU1937 130C1937 0.00743 ) 0.06405 ) (46763 (46768 EV EV 23AU1937 16MR1938 0.30438 ) 0. 05880 ) (46752 (46762 EV EV 15SE1937 18MR1938 C.087C7 1 C. 04411 ) (46751 EV F ? 30MR1938 6JL1964 0.01117 ) 0.00310 ) ( 1256 ( 1260 E F 2 3 14JL1964 6JL1964 0.00163 I 0.00191 ) ( 1258 ( 1268 F E 1 2 6JL1964 15AU1964 0.C1888 ) 0.0C547 > ( 1269 E 3 E 6 15AU1964 17SE1964 0.00274 1 0.00635 ) ( 1270 ( 1285 F F 1 1 10AU1964 15SE1964 0.02178 ) 0.59402 1 ( 1279 ( 1287 E F 1 3 16SE1964 15SE1964 0.01178 ) C.CC500 ) ( 1297 D 6 C 3 140C1964 28MR1967 0.OC190 ) 0.00132 ) ( 1302 ( 1449 E C 5 3 130C1964 16JL1967 0.00405 ) 0.00382 1 ( 1304 ( 1506 F A 1 6 110C1964 29AU1967 0.01482 ) C.0C523 ) ( 1512 E 3 GS11 ISE1967 12MY1967 0.0C393 ) 0.01584 ) ( 1533 ( 1389 A 4 GS13 19SE1967 12MY1967 0.00464 ) 0.00258 1 ( 1536 ( 1554 E GS 2 1 24SE1967 30C1967 C. 00273 ) 0.00356 ) ( 1555 GS 2 GS 8 30C1967 40C1967 0.01766 ) 0.00945 ) ( 1556 ( 1565 GS 3 GS13 30C1967 50C1967 0.00521 ) C. 01014 ) ( 1558 ( 1566 GS 5 GS14 40C1967 50C1967 C. 01189 ) C. 00183 ) ( 1567 GS15 GS28 50C1967 60C1967 0.00318 ) 0.00129 ) ( 1569 ( 1546 GS17 LU 1 50C1967 20C1967 0.00149 ) CO 1000 ) ( 1574 ( 1522 GS22 BH 1 60C1967 18SE1967 0. 01151 ) C. 00182 ) ( 1523 RA 1 KU 1 19SE1967 20SE1967 0.00923 ) 0.19187 ) ( 1526 ( 1549 MO MO 1 1 20SE1967 40C1967 0.00569 ) 0.02741 ) ( 1528 ( 1552 SB SM 1 1 20SE1967 60C1967 C. 01444 ) 0.OG660 ) ( 1550 I 14(M MR 1 CA 7 50C1967 I0MY1967 0.04956 ) 0.2 10MY1967 C.C13C8 ) (_ Cymbella obtusiuscula Kutz. Cymbella obtusiusoula Kutzing, Bacill., p. 79, pi. 3, fig. 68. 1844. 170 CB08TUSI TCT NO OF STATIGNS 6 (60973 CH 1876 0.02362 1 (46758 EV 5JN1937 0.00357 ) ( 1393 CS17 13KY1967 C.0C274 ) ( 1567 GS15 50C1967 0.00318 ) ( 1520 HO 1 18SE1967 0.00471 ) ( 14C5 ES 2 12MY1967 C.0C645 ) Cymbella parva (Wm. Smith) Cleve Coooonema parvum Wm. Smith, Syn. British Diat., Vol. 1, p. 76, pi. 23, fig. 222. 1853. Cymbella parva (Wm. Smith) Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 26(2) :172. 1894. 171 CBPARVA TCT NO OF STATIONS (60973 CH ( 1546 IH 1 1876 0.02362 ) ( 1256 E 2 20C1967 0.0050C ) ( 1403 CA 2 14JL1964 0. 00183 ) ( 1285 10HV1967 0.02615 ) ( 15SE1964 C.C1747 ) Cymbella parvula Krasske Cymbella parvula Krasske, Zeitschr. Geschiebeforsch., 9 (2): 92, pi. 2, fig. 3. 1933. 177 CBPARVUl TOT NO OF STATIONS EV 5JN1937 0.00357 ) ( 1258 0.00236 ) ( 1565 ( 1404 GS13 MO 2 50C1967 1CPY1967 0.01521 I 0.02541 ) ( 1574 ( 14C7 GS22 SW 2 60C1967 14WY1967 0.00288 I 0.0C597 1 ( 1553 I Cymbella prostrata (Berk.) Cleve Monema prostration Berkeley, Gleanings British Alg., pi. 4, fig. 3. 1832. Cymbella prostrata (Berk.) Cleve, K. Svenska Vet.-Akad. Handl., Ny Folid, 26(2): 167. 1894. 173 r.RPRflSTR TOT NO OF STATIONS (4697 1 CH 23N01945 0.00129 ) (46917 CH 12JA1946 0.00083 I (46915 CH 20FE1946 0.0C569 ) (46924 (46916 CH CH 10MY1946 4MY1947 0.00071 ) 0.00034 1 (46923 (469C6 CH CH 22N01946 MY1947 0.00437 ) 0.00066 1 (46920 (46919 CH CH 200E1946 5JN1947 0.00031 I C.C5463 ) (46922 (46757 CH EV 21AU1947 25JL1937 0.00291 ) 0.00963 ) (46758 (46747 EV EV 5JN1937 1AU1937 0.01426 1 0.00495 ) (46764 (46763 EV EV 17JL1937 23AU1937 C.0C806 1 C. 02029 ) (46765 (4674 9 EV EV 30AU1937 12MR1938 0.0C558 1 0.03641 ) (46752 (46768 EV EV 15SE1937 16MR1938 0.13061 ) O.C1470 1 (46748 (46762 EV EV 130C1937 18KR1938 C.1281C ) C. 06617 ) (46766 ( 1765 EV C 2 14DE1938 10AU1964 0.01584 ) 0.00224 ) ( 1243 ( 1270 E 6 F 1 13JN1964 10AU1964 0.00418 ) 0.00272 ) ( 1245 I 1279 F 2 E 1 11JN1964 16SE1964 0.00346 ) 0. 00393 1 ( 1285 ( 1369 F 1 A 4 15SE1964 4MY1S67 0.01165 ) 0.CC745 ) ( 1343 ( 1375 . A 6 E 3 19AP1967 7MY1967 0.00208 ) 0.00241 ) ( 1345 ( 1416 C 5 E 5 25AP1967 28HY1967 C.0C195 ) C.0C219 ) ( 1504 ( 1538 A 3 E 5 28AU1967 23SE1967 0.00247 ) 0.29277 ) ( 1512 ( 1386 £ 3 GS10 1SE1967 12KY1967 0. 00393 ) 0.00287 ) ( 1536 ( 1387 E 2 CS11 24SE1967 12HY1967 0. 01091 ) C.CC792 ) ( 1394 ( 1397 GS18 GS21 13MY1967 13MY1967 0.00172 ) 0.00392 ) ( 1395 ( 1554 GS19 GS 1 13MY1967 30C1967 0.00117 ) 0.00356 1 ( 1396 ( 1555 C-S20 GS 2 13HY1967 30C1967 C.0C074 ) C. 00353 ) ( 1556 ( 1567 GS 3 GS15 30C1967 50C1967 0.01043 ) 0.00635 1 ( 1557 ( 1568 GS 4 GS16 30C1967 50C1967 0.00747 ) 0.00144 ) ( 1563 ( 1569 GS11 GS17 50C1967 50X1967 C.0C234 ) C.0C149 1 56 _L547_ 1521 _152i_ 1529 1548 1553 1427 1402 _L14?„ GS21 MS 1 SH 1 MO 1 KM 1 CA I SG 1 UU 2 TR 2 CI 2 60C1967 20C1967 18SE1967 20SE1967 0.00336 ) 0.00798 I 20SE1967 30C1967 6CC1967 29MY1967 0.00577 ) 0.06258 ) 2.68617 ) 0.05088 ) 0. 01469 ) 0.01211 ) 6MY1967 0.01624 > 19AP1967 0.00359 ) 1574 1524 GS22 Ml 1 1523 1527 RA 1 TR 1 1530 1552 1428 MU 2 1350 BH 2 1403 14C6 CA GB 60C1967 20SE1967 19SE1967 20SE1967 24SE1967 60C1967 29MY1967 19AP1967 10MY1967 13MY1967 0.03739 ) 0.13135 ) 0.02768 ) 0.06289 ) 0. 16002 ) 0.01321 ) 0.00301 ) 0.00441 ) 0.06539 ) 0.00270 ) I 1544 ( 1546 20C1967 20C1967 C.CC238 I C.C6502 I ( 15 25 ( 1528 20SE1967 20SE1967 1545 1550 hi 1 CR 1 20C1967 50C1967 ( 1426 { 1401 MS 2 CO 2 ( 1407 ( 29MY1967 6MY1967 C. 08355 ) C.C2888 ) C.0C676 ) C. 07434 ) 0.03150 I C. 00588 I Cymbella rugosa Hust. Cymbella rugosa Hustedt, Abh. Naturw. Ver. Bremen, 34(1): 67, figs. 29-31. 1955. 179 CBTURGID TOT NO OF STATIONS 3 ( 3541 CH "1FE1881 0.00978 ) ( 1244 -f-l UJNT964 -CTOOTfO"! rl270 Tl iOMJ1964~ C.CC272 V Cymbella sinuata Greg. Cymbella sinuata Gregory, Quart. J. Micr. Sci., 4:4, pi. 1, fig. 17. 1856. 175 CBSINUAT TCT NO OF STATIONS 3C 3540 146763 CH F 1 F 1 GS18 GS17 GS21 IU 1 ES 1 HO 2 UMY1879 23AU1937 0.00466 ) C.Q2029 I 6JL1964 15SE1964 0.0C472 ) 0.00582 ) 13MY1967 50C1967 0.00172 ) 0.00149 ) 60C1967 20C1967 0.00112 0.00500 50C1967 22MY1967 0.00799 ) 0.00374 ) 46758 46748 1263 1372 1567 1571 1574 1526 EV EV C 7 C 5 GS15 GS19 GS22 MO 1 5JN1937 130C1937 C.C0357 ) 0.02135 I 15AU1964 5MY1967 C. 00400 ) 0.00355 ) 50C1967 60C1967 0.00635 ) C. 00059 I 60C1967 20SE1967 C. 00863 ) 0.01138 ) 50C1967 C. 26019 ) 46764 1256 EV E 1275 1375 0 2 E 3 1568 1572 GS16 GS20 1575 1527 GS28 TR 1 1426 MS 2 1401 MO 2 17JL1937 14JL1964 17SE1964 7MY1967 50C1967 60C1967 60C1967 20SE1967 29MY1967 6HV1967 CC806 ) 00183 ) 0C645 1 CC241 ) CC144 ) OC090 ) CC129 ) 0C629 ) 01050 ) 00588 ) Cymbella sinuata fo. ovata Hust. Cymbella sinuata fo. ovata Hustedt, Internat. Rev. Hydrobiol., 10:236. 1922,. 17* r.RSINIIFn TOT NO OF STATIONS -L 1350 __BH_2_ 19AP1967 0.00220 ) Cymbella sinuata var. antiqua (Grun.) Cleye Cymbella abnormis var. antiqua Grunow in; Mojsisovics and Neumayer, Beitr. PalHontol. Osterreicti-Ungarns, 1882. Bd. 2, Heft 4, p. 141, pi. 29, fig. 31. Coll: 1105 Cymbella tviangulata (Ehr.) Cleve Gloeonema triangulatum Ehrenberg, Ber. Akad. Wiss. Cymbella tviangulata 26(2) :168. 1894. Berlin, 1845:77. 1846. (Ehr.) Cleve, K. Svenska Vet. -Akad. Handl., Ny Foljd, 177 CRTRIANG TOT NO OF STATIONS 36 J_35_40_ (46915 146905 ( 1285 _L1222_ CH CH (46907 CH I 1759 F__„2_ F 1 E 6 11MY1879 20FE1946 JA1947 0.01707 I 0.00123 I JL1947 6JL1964 0. 00049 ) 0.C031O ) 15SE1964 7N01964 0.01747 ) 0.00333 ) [46923 (46909 (46522 ( 1275 ( 1302 ( 1323 12MY1967 0.01810 ) < 1390 CH CH CH D 2 E 5 F 1 22N01946 MR1947 0.02841 ) 0.01366 ) (46920 (46906 CH CH 21AU1947 17SE1964 0.005213 ) 0.00645 ) ( 1247 ( 1284 B 3 E 6 130C1964 6N01964 0.00405 ) 0.00279 1 ( 1304 ( 1324 F 1 F 2 12MY1967 0.00587 ) 1 1557 20DE1946 MY1947 14JL1964 17SE1964 110C1964 6N01964 0.00123 ) C.CC066 I C.0C427 ) 0.01589 ) C.C0741 I 0.00233 ) 57 I 1558 GS 5 4fir.l96 7 C. 00396 ) 1 156? GS1C 50C1967 0.00247 ) ( 1563 GS11 50C1967 C.CC234 ) ( 1564 ( 1568 GS12 GS16 50C1967 50C1967 0.00494 ) 0.0C433 ) ( 1566 ( 1569 GS14 GS17 50C1967 50C1967 0.00183 ) 0.01635 1 ( 1567 ( 1570 GS15 CS18 50C1967 50C1967 C. 02382 ) C.0C992 ) ( 1548 CA 1 30C1967 0.03816 ) ( 1551 ES 1 5CC1967 0.00799 ) ( 1421 CH 2 23MY1967 C.C1735 ) Cymbella tumida (Br£b.) V. H. Coooonema tumida de Br£bisson ex Kutzing, Sp. Alg., p. 60. 1849. Cymbella tumida (Br£b.) Van Heurck, Syn. Diat. Belgique, p. 64, pi. 2, fig. 10. 1885. 178 CBTUMDA TCT NC OF STATIONS 1 I- 1544 fU 1 2GCT967 0.0C477 1 T Cymbella turgida Greg. Cymbella tuvgida Gregory, Quart. J. Micr. Sci., 4:5, pi. 1, fig. 18. 1856. 180 CBTURGVP TCT NG OF STATICNS 2 (138 7 ~ GsYl I2>m^l bToTTas") FlBM G-S13 IZMYlsT? c^oIsTY— T" Cymbella turgidula Grun. Cymbella turgidula Grunow in: A. Schmidt, Atlas Diat., pi. 9, figs. 23-26. 1875. Coll: 1244. Cymbella ventrioosa Agardh Cymbella ventrioosa Agardh., Consp. Crit. Diat., part 1, p. 9. 1830. 181 CBVENTRI TOT NC CF STATICNS 42 (46921 CH 23N01945 C.CC065 ) 0.00097 ) (46924 (46758 CH EV 10KY1946 5JN1937 0.00282 ) 0.05706 ) (46919 (46743 CH EV 5JN1947 20JN1937 C.CC152 ) C.0C428 ) (46770 EV EV 9JL1937 1AU1937 C.0C596 ) 0.0C990 ) (46764 (46763 EV EV 17JL1937 23AU1937 0.00806 ) 0.10146 ) (46757 (46765 EV EV 25JL1937 30AU1937 C.C1444 I C.0C558 ) (46752 (44748. (46762 ._L.L2.43.. ( 1377 EV ev EV 15SE1937 0.13061 ) 0.02135 ) (46760 (46767 EV EV 22SE1937 270C1937 0.00985 ) 0.00387 ) (46750 (46749 EV EV 24SE1937 12MR1936 10JM964 16SE1964 C.C2427 ) 18MR1938 0.06617 ) 0.01253 ) ( 1232 ( 1244 ( 1378 ( 1559 E F 5 1 16MY1964 11JN1964 0.00522 ) 0.00548 1 ( 1240 I 1279 0 6 E 1 C.CC460 ) C.CC393 ) GS 1 9MY1967 0.00396 ) 0.00516 1 GS GS 2 7 9MY1967 40C1967 0.00421 ) 0.00350 ) ( 1392 ( 1565 GS16 GS13 12MY1967 50C1967 C.0C3O8 1 C.CC507 ) ( 1567 GS15 50C196 7 0.00318 ) 0. 00129 ) 0.00547 I 0.01050 ) ( 1569 ( 1547 GS17 MS 1 50C1967 20C1967 0.00149 ) 0.01597 1 ( 1571 ( 1546 GS19 LU 1 60C1967 20C1967 C.CC176 ) C.C2001 ) ( 1522 . ( 1426 BH 1 MS 2 18SE1967 29MY1967 ( 1527 ( 14C2 TR TR 1 2 20SE1967 6MY1967 0.03774 ) 0.01083 ) ( 1530 ( 1405 FR 1 ES 2 24SE1967 12MY1967 C. 03000 ) C.CC645 ) Species ineertae sedis Cymbella sp. (aff . C, ouspidata var.?) . 151 CBCUSPVC TCT NO OF STATICNS 8 (46758 EV 5JN1937 0.01426 ) (46763 EV 23AU1937 0.02029 ) (46757 (46762 ( 1404 EV EV MC 2 25JL1937 18MR1938 0.00963 ) 0.02206 ) (46747 ( 1545 EV hL 1 1AU1937 20C1967 C. 01485 1 C.0C676 ) ( 1354 GH 2 25AP1967 0.00173 ) 10MY1967 C. 02541 ) ( Cymbella sp. (aff. C. pus ilia) . 174 CBPUSILC TCT NO OF STATIONS (46763 I 1285 EV F 17JL1937 0.02417 ) 23AU1937 15SE1964 0.02029 ) 0.04077 I 10MY1967 0.01270 I ( 1242 ( 1375 E 3 E 3 13JN1964 7WY1967 0.0O150 > C. 00241 ) ( 1270 ( 1566 F 1 GS14 10AU1964 5CC1967 0.CC545 ) C.0C183 ) 58 Cymbella sp. #4. 184 C6SPECG0 TOT NO OF STATIONS 7 (46752 EV 15SE1937 0.02177 1 (46768 EV 16MR1938 0.01470 ) (46750 (46751 EV EV 24SE1937 30HR1938 C. 00471 ) 1.21706 ) (46748 ( 1284 EV E 6 13CC1937 17SE1964 C. 02135 ) 0. 00318 ) ( 1445 B 6 14DC1964 0.00326 ) 1 Cymbella sp. #6. 186 CBSPECOF ret NO OF STATIONS 11 (46919 CH 5JN1947 17JL1937 0.00152 ) 0.04835 ) (46758 (46747 EV EV 5JN1937 1AU1937 C.C1070 ) 0.00248 ) (46770 (46752 EV EV 9JL1937 15SE1937 C.0C596 ) C. 02177 ) (46744 ( 1565 EV GS13 60C1937 50C1967 0.00975 ) 0.02028 ) (46767 ( 1405 EV ES 2 270C1937 12MY1967 0.00387 ) 0.00645 ) (46759 ( EV 19PV1938 C.0C338 ) Cymbella sp. #7. 187 CBSPECOG TOT NO OF STATIONS EV 9J11937 0.01789 ) 0.C147C I 17JU937 C. 04835 I 25JL1937 C. 03370 ) Cymbella sp. #8. 188 EBSPECCH TCT NO OF STATIONS 1 (46764 EV 17JL1937 0.01612 1 T Cymbella. sp. #9. 189 CBSPECOI TOT NO OF STATIONS 1 (46770 EV 9JL1937 0.0C596 1 T~ Cymbella sp. #10. 190 CESPECOJ TOT NO OF STATIONS 1 ( 1394 6S18 13MV1967 0.0C172 ) T Cymbella sp. #11. 191 CBSPECOK TOT NO OF STATIONS 1 ( 1398 GS22 14MY1967 0.00304 ) ( Cymbella sp. #12. 192 CBSPECOL TOT NO OF STATIONS 1 ( 1565 GS13 50C1S67 0.00507 I ( Cymbella sp. #13. 193 CBSPECOM TOT NO OF STATIONS 1 C 1567 GS15 50C1967 0.00159 ) ( 59 Cyrribella sp. #14. 194 CBSPECON TCT l\C CF STATIONS 1 ( 1573 GS21 6CC1S67 0.00112 ) T Genus Cymbellonitzsahia Hust. Hustedt in: A. Schmidt, Atlas Diat., pi. 352, figs. 12-13. 1924. Members of the genus Cymbellonitzs.o'hia usually comprise a minor portion of the flora. Scattered reports of its occurrence indicate that it finds its primary habitat in periphyton and epipelic communities. The only species found in Lake Michigan is most abundant in epipelic communities in relatively deep water. Only isolated accidental occurrences are noted in plankton col- lections. Cymbellonitzsahia diluviana Rust. Cymbellonitzschia dituviana Hustedt, Ahh.. Naturw. Verein Bremen 33(3):453, fig. 23-24. 1954. 195 CODILIUV TOT NO OF STATIONS 5QC1967 0.02478 ) ( 1417 K0 2 22MY1967 0.00374 1 ( 1350 60 Genus Dentioula Ehr. Ehreriherg, Infusipnsthiexschen., p. 2Q7. 1838. Most freshwater members of the genus Dentiauta are most abundant in communities growing on solid surfaces. This is true of the single represent tative that occurs in our collections. It is, however, apparently a suc- cessful facultative planktont as it is noted in moderate abundance in many plankton collections from Lake Michigan, especially in nearshore collections. Dentiaula tenuis var. avassula (Naeg.) Hust. Dentiauta avassula Naegeli ex Ktttzing, Sp. Alg„ , p. 889. 1849. Dentiaula tenuis var. avassula (Naeg.) Hustedt in: Pascher, Sussw.-Fl. Mitteleuropas , Heft 10, Aufl. 2, p. 381, fig. 724. 1930. 196 DETENUVC TOT NO OF STATIONS (60973 (46920 CH CH 1876 200E1946 0.02362 ) 0.00031 ) 46521 46516 CH CK 23N01945 4MY1547 0.00065 ) C. 00034 ) (46914 (46906 CH CH 19AP1946 MY1947 C. 00107 ) C.0C066 ) (46919 (46764 CH EV 5JN1947 17JU937 0.00303 ) 0.01612 ) 465C7 (46763 CH EV JL1947 23AU1537 C. 00049 ) C. 04058 ) (46758 (46752 EV EV 5JN1537 15SE1937 C.0C357 ) C.C6530 ) (46748 I 1240 EV D 6 130C1937 10JN1964 0.04270 ) 0.00153 ) (46767 1243 EV E 6 270C1537 13JN1964 0.00774 ) 0.01253 ) (46762 ( 1244 EV F 1 18MR1938 11JN1964 C. 02206 ) 0.00877 1 1 1254 1 1259 D F 2 2 15JL1964 6JL1964 0.00192 ) 0.00930 ) 1256 1260 E F 2 3 14JL1564 6JL1964 0.00183 I 0.01528 ) ( 1258 ( 1267 F D 1 6 6JL1S64 16AU1964 C. 17462 ) C.0C432 ) ( 1268 I 1278 E D 2 15AU1964 18SE1964 0.12310 ) 0.00384 ) 1 1270 1279 F E 1 1 10AU1964 16SE1964 0.05718 ) C. 05497 ) ( 1444 ( 1284 B E 6 6 19SE1964 17SE1964 C. 00303 ) C. 02224 ) « 1285 I 1299 F E 1 2 15SE1964 120C1964 0.81533 ) 0.00314 ) 1286 1301 F E 2 4 15SE1964 130C1964 0.01095 ) 0.00442 ) ( 1287 ( 1302 F E 3 5 15SE1964 130C1964 C.CC500 ) C. 00405 ) ( 1304 1 1322 F E 1 6 110C1964 7N01964 0.03457 I 0.00333 ) 1305 1323 F F 2 1 UGC1564 6N01964 C. 00690 ) 0.00139 ) ( 1306 ( 1340 F C 3 7 110C1964 26MR1967 0.00554 ) C.0C145 ) J 1346 I 1452 C F 7 2 21AP1967 14JL1967 0.00134 ) 0.01916 1 1374 1512 E E 2 3 7MY1967 1SE1967 0.00299 I 0.00393 ) -.( 1449 ( 1533 C A 3 4 16JL1967 19SE1967 C. 00382 ) C. 00464 ) < 1534 1 151B A F 6 5 19SE1967 23SE1967 0.00310 1 0.02762 ) 1536 ( 1541 E E 2 2 24SE1967 110C1967 0.01363 ) 0.00532 ) ( 1537 ( 1542 E E 3 3 24SE1967 110C1967 C.0C431 ) 0.01526 ) ( 1543 I 1382 ... E GS 5 6 100C1967 10MY1967 0.00718 ) 0.00555 ) 1380 1384 GS GS 4 8 9KY1967 10MY1967 0.00336 1 0.00555 ) ( 1381 ( 1386 GS 5 GS10 10MY1S67 12MY1967 C.0C239 ) 0.00287 ) ( 1387 ( 1398 GS11 GS2? 12MY1967 14MY1967 0.20596 ) 0.00911 ) 1389 1554 GS13 GS 1 12MY1967 30C1967 0.01805 ) 0.02846 ) ( 1394 ( 1555 GS18 GS 2 13MY1967 30C1967 C.CC516 ) C. 02472 ) ( 1556 I 1559 GS GS 3 7 30C1967 40C1967 0.01564 ) C. 01049 ) 1557 1561 GS GS 4 9 30C1967 4CC1967 C. 02242 1 0.00587 ) 1 1558 ( 1562 GS 5 GS10 40C1567 50C1967 C. 03171 ) C. 00493 ) ( 1563 ( 1566 GS11 GS14 50C1967 50C1967 0.00468 ) 0.00183 ) 1564 1567 GS12 GS15 50C1567 50C1967 0.00165 ) 0.00318 ) I 1565 ( 1566 GS13 GS16 50C1967 50C1967 C. 01521 I C. 00144 ) ( 1569 ( 1546 GS17 LU 1 50C1967 20C1967 0.0C145 ) 0.02501 ) 1574 1526 GS22 M0 1 60C1967 20SE1967 0.17834 ) 0.05689 ) I 1547 ( 1527 US TR 1 1 2CC1967 20SE1967 C. 02395 ) I 1529 KH 1 1 2CSE1967 40C1967 0.57561 ) 0.06652 ) ( 1530 1551 FR ES 1 24SE1567 C. 32003 ) C. 02396 ) ( 1545 ( 1552 kL SM 1 1 20C1967 60C1967 C.CC676 ) ( 1549 M0 5EC1967 0.05943 ) 1 1550 ( 1402 MR TR 1 2 50C1967 6MY1567 0.01239 I 0.02166 ) 1553 1352 SG 1 2 60C1967 21AP1967 0.02203 ) 0.02577 1 ( 1401 ( 1403 MO CA 2 ? 6MY1567 10MY1967 0.01764 ) C.6277C ) ( 1404 M0 2 10MY1967 0.01270 ) ( 14C7 SM 2 14MY1967 0.17317 1 ( Genus Diatoma Bory (nom. cons, non Loureiro 1790) Bory, Diet. Class. Hist. Nat., 5:461. 1824. Of the members of the genus Diatoma occurring in Lake Michigan, only D. ienue var. elongata and D. tenue var. pachycephala are abundant in off- shore plankton collections. Both of these entities are erratic in occurence but tend to be most abundant in areas that are appreciably eutrophied. During peak bloom years they are taken in collections from the entire basin. Diatoma ehvenbevgii Kutz. Diatoma ehvenbevgii Kutzing, Bacill., p. 48, pi. 17, fig. 17(1-3). 1844. 197 D EHRENB TCT NO OF STATIONS 40 (46921 (46920 CH CH 23N01945 20DE1946 0.00065 ) 0.00092 ) (46524 (46516 CH CH 10MY1946 4MY1947 0.00141 ) 0.00170 ) C. 00049 ) 0.00238 ) (46923 (46906 (46922 (46770 CH CH CH EV 22NC1946 MY1947 21AU1947 9JL1937 C.CC219 ) C. 00066 ) C.0CC97 ) C. 00596 ) (46919 1 AA75R CH FV 5JN1947 * IN1937 2.41574 1 1.49775 ) (469C7 (46771 CH EV JL1947 11JN1937 61 146764 146756 EV EV 17JL1937 27AP1938 0.O08O6 1 0.0C168 ) 46f5f 46761 tv EV 23JL19J/ 27MY1938 U.UU4U1 1 0.00273 1 146 Ibl I 1226 EV C 7 270C1937 16MY1964 C.0C387 l C. 00381 ) ( 1345 ( 1449 C 5 C 3 25AP1967 16JL1967 0.00780 ) 0.00764 ) 1346 1395 C 7 GS19 21AP1967 13MY1967 0.00267 ) 0.00587 ) ( 1348 1 1397 E 5 GS21 23AP1961 13MY1967 C.CC822 ) C. 01112 ) ( 1398 ( 1546 GS22 LU 1 14MY1967 20C1967 0.00607 ) 0.02001 ) 1572 1530 GS20 FR 1 60C1967 24SE1967 C. 00090 ) C. 01000 ) I 1574 I 1552 GS22 SM I 60C1967 60C1967 C.0C288 ) O.CC660 1 1 1550 ( 1417 MR 1 HO 2 50C1967 22MY1967 0.03717 ) 0.09346 I 1426 1418 MS 2 SH 2 29MY1967 22MY1967 C. 20997 ) 0.04666 ) < 1427 ( 1401 LU 2 HO 2 29MY1967 6MY1967 0.01211 ) C.CC588 ) < 1354 1 1423 GH 2 HA 2 25AP1967 25MY1967 0.01208 ) 0.00856 ) 1429 ML 2 29KY1967 0.04247 ) ( 1407 SH 2 14MY1967 C. 19108 ) 204 DIVULGVG TOT NO CF STATIONS I ( 1340 C 7 28MR1967 0.C0800 1 ( Diatoma hiemale var. mesodon (Ehr.) Grun. Fvagilavia mesodon Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1838:57, pi. 2(1), fig. 9. 1839. Diatoma hiemale var. mesodon Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 51, figs. 3-4. 1881. 198 DIHIEt'VW TCT NO OF STATIONS 2 146758 EV 5JN1937 0.CC357 ) 19AP1967 0.00108 ) Diatoma tenue Agardh Diatoma tenue Argardh, Svenska Bot., Vol. 7, pi. 491, figs. 4-5. 1812, rENUE TOT NO OF STATU NS 58 CH AP1947 146924 (46771 (46766 CH EV EV 10MY1946 11JN1937 140E1938 0.01411 ) 46909 CH MR1947 0.02277 ) (46912 C.C1150 ) 0.01189 ) 0.06337 ) 46749 1230 EV E 2 12MR1938 16MY1964 0.03641 ) 0.00296 ) (46761 ( 1439 EV B 6 27MY1938 5JN1964 C. 00273 ) C. 00200 ) ( 1239 0 F C« E 4 1 2 5 11JN1964 11JN1964 0.00116 1 0.00329 ) 1240 144C 0 B 6 6 10JN1964 11JL1964 0. 00153 ) 0.00737 ) ( 1241 ( 1264 E 2 C> 1 13JN1964 10AU1964 0.00296 ) C.0C193 ) ( 1265 ( 1302 10AU1964 130C1964 0.01118 ) 0.00405 1 1268 1337 E C 2 3 15AU1964 2MR1967 0.00274 ) 0.68490 ) < 1269 ( 1338 E 3 C 3 15AU1964 28MR1967 0.0054S ) C.25520 ) ( 1340 ( 1433 ( 1449 ( 1454 C c c - E 7 1 3 5 28MR1967 17JN1967 0.06617 ) 0.03875 t 1431 1435 A C 3 7 12JN1967 13JN1967 0.00257 1 0^00631 ) ( 1432 ( 1446 A 4 A 3 13JN1967 11JL1967 0.00511 I C. 00489 ) 16JL1967 15JL1967 0.00764 ) 0.00200 1 1451 1536 c E 7 2 16JL1967 24SE1967 0.08267 I 0.01363 ) ( 1452 ( 1395 E 2 GS19 14JL1967 13MY1967 C. 00426 I C. 00235 ) 1 1396 GS20 GS 1 13MY1967 30C1967 0.01036 ) 0.01067 ) 1397 1555 GS21 GS 2 13MY1967 30C1967 0.41205 1 0.00353 1 ( 1398 ( 1544 GS22 MJ 1 14MY1967 20C1967 C. 00304 ) C. 01191 ) ( 1522 1 1476 I 1350 ( 1352 BH MS BH KM 1 2 2 2 18SE1967 25MY1967 0.00365 ) 0.16798 ) 1550 1351 MR MI 1 2 50C1967 21AP1967 C. 02478 ) 0.17688 ) { 1428 ( 1417 MU 2 HO 2 29MY1967 22MY1967 1.39805 ) C. 07103 ) 1SAP1967 21AP1967 0.63435 ) 0.00859 ) 1425 1353 RA FR 2 2 25MY1967 23AP1967 0.01768 ) 0.09494 ) ( 1399 ( 1354 PH 2 GH 2 5MY1967 25AP1967 0.00680 ) 1.4C847 » ( 1429 LX4Q4 _ ( 1423 ML GB HA 2 2 2 29MY1967 13MY1967 25MY1967 0.03185 1 0.00809 I 1405 1421 ES CH 2 2 12MY1967 23MY1967 0.00645 ) 0.06940 1 ( 1407 t 1422 SM 2 GA 2 14MY1967 23MY1967 C. 50158 1 0.03576 ) 0.03426 ) Diatoma tenue var. elongatum Lyngb. Diatoma tenue var. elongatum Lyngbye, pi. 61, figs. E 1-2. 1819. Tent. Hydrophyt. Danicae, p. 179, 200 DITENUVE TOT NO OF STATIONS 283 0C1945 1.63302 ) 23N01945 15.99441 ) 0E1945 25.19637 ) 146917 (46924 (46905 (46916 _L449JJ7_ (46750 146767 (46762 (46756 CH CH CH CH 146758 EV 146745 EV 146757 EV (46765 EV_ EV EV EV EV 17.IA1946 36.27559 ) (46'515 10MY1946 JA1947 5.57170 ) 3.02733 > (46923 (469C9 CH CH 4MY1947 27.78786 ) JLI947 7.17973 1 (469C6 146913 5JN1937 2.09685 1 3JL1937 C. 02090 ) (46771 (46770 25JL1937 0.18295 1 30AU1937 0.03904 ) 146747 146752 24SE1937 0.02828 I 27CC1937 0.05802 ) (46744 (46749 18MR1938 27AP1938 0.08822 ) 7.42818 I (46751 (46759 CH CH EV EV EV EV EV EV EV EV 70FF1946 28.11130 I 146914 22N01946 1.70477 1 MR1947 14.64869 I 146920 146912 CH CH _CH_ MY1947 18.37766 1 146919 6AU1947 C. 84719 ) 146922 CH _CH__ 11JN1937 1.19823 1 146743 EV 9JL1937 0.01789 ) 146764 EV 1AU1937 0.02723 1 15SE1937 0.10884 ) 146763 146760 EV EV 60C1937 12MR1938 30MR1938 19MY1938 2.18494 ) 0.52191 I (46748 146768 EV EV 1.25056 ) C. 69548 ) 146772 146761 EV EV 19AP194* 11.79887 ) 20OE1946 AP1947 3.28436 ) C.39C94 ) 5JN1947 18.09836 ) 21AU1947 2.23663 ) 20JN1937 0.14987 I 17JL1937 C.C3223 ) 23AU1937 22SE1937 0.06088 ) C. 03939 ) 130C1937 0. 02135 ) 16MR1938 C. 16169 ) 18AP1938 27MY1938 C. 49681 ) C. 33522 1 62 (46766 J___22_5_ ( 1228 _1__K33_. I 1439 ( 1240 ( 1243 ( 1441 _L__2_5.__ ( 1254 < 1257 ( 1260 __1442_ ( 1266 ______&__ ( 1271 ( 1274 ( 1277 .J _._:.___ ( 1283 _( .12_.8. ( 1290 -I 1294 ev c 6 D 2 ______ B 6 D 6 E 6 ______ B 6 ______ D 2 E 3 F 3 _____ D 3 E 3 C 7 _______ D 4 _E_2_ 14CE1538 15M Y1964 7.96479 ) C.2C776 ) ( 1223 ( 1226 B 3 C 7 18. Y1964 16PY1964 0.02344 ) C. 06849 ) I 1224 (1227 B 4 C 2 14MY1964 5JN2964 0.00584 ) 0.15241 ) 1 1229 ( 1234 0 5 _____ 14MY1964 18JN1964 0.00634 ) 0.23336 ) ( 1230 ( 1235 E 2 C 7 18MY1964 13MY1S64 16MY1964 16JN1964 5JN1964 10JN1964 C. 12787 ) 0.17180 ) ( 1236 ( 1241 E 2 8JM964 13JN1964 1.71533 ) 0.25875 ) < 1237 (1242 C 2 £ 3 8JN1964 13JN1964 0.C1568 ) C^0C219 I C. 05334 ) J!. 17793 J C.27842 ) 0.00450 ) 13JM964 14JL1964 0.21298 I 0.29880 ) ( 1244 ( 1248 F 1 B 3 11JN1964 24JL1964 0.04934 ) 0.0354T ) ( 1245 ( 1440 F 2 B 6 11JN1564 11JL1964 C.C1729 ) 0.0626 5 X 24JL1964 16JL1964 0.01542 I 0.13037 1 ( 1249 ( 1252 C 3 C 1_ 8JL1964 16JL1964 1.14C68 ) 1.07392 ) ( 1250 ( 12 53 C 6 C 2 15JL1964 14JL1964 0.67037 I 0.03589 ) ( 1255 { 1258 D 5 F 1 15JL1964 6JL1964 C.C8726 I 0.66074 ) ( 1256 ( 12 59 £ 2 F 2 10JH964 16JL19_64_ 14 JL 1964 6JL1964 C.C6166 ) C. 63904 I C. 23265 I 0.15493 I 6JL1964 2AU1964 0.13370 ) 0.01706 ) ( 1261 ( 1264 2AU1964 10AU1964 0.00196 ) 0.07337 ) ( 1262 ( 1265 18AU1964 15AU1964 0.67700 ) 0.02467 1 ( 1267 ( 1270 D 6 F 1 18AU1964 10AU1964 C. 16645 i C. 17155 ) ( 1268 ( 1444 B 3 C 2 E 2 B 6 17AU1564 10AU1964 22SE1964 17SE1964 0.22198 ) 0.04223 ) ( 1272 ( 1275 C 1 0 2 10SE1964 17SE1964 0.00821 ) C. 01935 ) 15AU1964 19SE1964 ( 1273 ( 1276 C 2 0 3 10SE1964 18SE1564 C. 00210 ) C. 13189 ) C. 67020 ) C.0C606 ) CO 1075 ) C.C3353 ) 18SE1964 16SE1964 0.03718 ) 0.04085 ) ( 1278 _L_1____1_ C 6 E 3 18SE1964 16SE1964 C. 02690 ) C. 02355 I ( 1279 ( 1282 E 1 E 4 16SE1964 USE 1964 0.01178 ) C.C3324 ) ( 1297 ____________ I 1303 jlj____-. ( 1311 I 1314 E 5 _______ C 1 n 3 D 6 _E_3__ E 6 _____ D 1 _£>____ 16SE1964 150C1964 16001964 150C1964 0.03065 I _0.0_04.35_L 0.01516 ) 0.01648 ) ( 1284 ____45 ( 1291 ( 1295 E 6 _B 6 17SE1964 140C1564 0.40352 ) 0.0C978 ) ( 1287 ( 1289 F 3 C 7 15SE1964 14CC1964 C. 01001 ) 0.07475 ) C 2 D 4 160C1964 150C1964 0.00734 ) 0.01189 ) ( 1293 ( 1296 D 2 0 5 150C1964 14CC1964 0.C1415 ) C. 01574 ) 14DC1964 ___lQ__.__4_ 13CC1964 6N01964 0.26655 ) _0..0 2148_. 1.37132 I 0.13687 ) ( 1298 ( 13C1 ( 1306 J_ 1.309 E 1 E 4 120C1964 13CC1964 0.00269 ) C.01766__l ( 1299 ( 1302 E 2 E 5 120C1964 130C1964 F 3 _£___._ 110C1964 J0Ji0.1964_ 0.00277 I C.C2251 I ( 1307 ( 1310 B 6 C 2 M01964 10NC1964 8N01964 9N01964 0.00516 I 0.01435 ) I 1312 ( 1315 0 2 D 5 8N01964 9N01964 0.00621 ) C. 02730 ) ( 1313 ( 1316 D 3 0 6 9N01964 9N01964 C. 01571 I _C._14_5J_6 i_ 6.5C512 ) 0.0C227 ) C. 01158 ) C. 37020 ) ( 1317 _______ 320 ( 1323 —LI 338 ( 1341 < 1344 1 1347 -L.J.369 E 1 __E_4_ F 1 _____ A 3 C 3 E 2 ______ 6N01564 7N01S64 0.00383 ) C.01C34 I ( 1318 ( 1321 E 2 E 5 7N01964 7N01964 0.01332 ) 0.02873 ) ( 1319 ( 1322 E 3 E 6 7N01964 7N01964 C.C1047 ) C. 46656 ) 6N01964 _2_SMR_15___ 19AP1967 2 5AP1967 0.00139 ) 0.80129 I 0.91123 ) 0.21011 ) ( 1336 ( 1339_ ( 1342 ( 1345 C 3 C 5 27JA1967 28. R1967 C.C134B ) 0.15589 ) ( 1337 ( 1340 C 3 ______ 2MR1567 28MR1967 A 4 C 5 19AP1967 25AP1967 C. 25265 ) C.08187 ) ( 1343 ( 1346 A 6 C 7 19AP1967 21AP1967 1.13170 ) 1.06894 ) C. 68084 1 23AP1967 4MY196_I_ 1.25193 ) 0.00373 ) ( 1348 .( 137_0_. E 5 A 6 23AP1967 3HY1967 0.11378 ) 0.23478 1 ( 1368 ( 1373 A 3 C 7 4MY1967 5MY1967 C. 05655 1 C.O0285 ) ( 1374 __._1.4___ ( 1412 ( 1415 E 2 ______ C 5 ______ 7MY1967 23MY1967 0.01494 ) 0.00894 1 ( 1375 ( 1409 E 3 A 4 7MY1967 23MY1967 0.00241 ) 0.00298 ) ( 1376 ( 1411 E 5 C 3 6MY1967 31MY1967 C.C1968 I C. 02872 ) 31MY1967 2SMY1967 0.00421 ) 0.00450 ) ( 1413 ( 1416 C 7 E 5 25MY1967 28MY1967 0.00316 ) 0.03280 1 i 1414 ( 1431 E 2 A 3 28MY1967 12JN1967 0.C2687 ) 1.19989 ) I 1432 _________ A 4 ______ 13JN1967 13JN1967 0.12261 ) 0.73880 ) ( 1433 ( 1436 C 3 E 2 17JN1967 __________ 0.24545 ) 1.85989 ) ( 1434 ( 1437 C 5 E 3 17JM967 15JN1967 C. 01794 ) 0.01346 ) ( 1438 l_l__i__ E 5 ______ 14JN1967 10JL1967 0.00363 ) 10.64545 ) ( 1446 ( 1449 A 3 _P 3_ 11JL1967 16JL1S67 1.88347 ) C. 22546 ) ( 1447 _________ A 4 C 5 11JL1961 16JL1967 C. 65494 ) 0.03428 ) ____JL_ 16JL1967 14.19235 ) ( 1452 15.11 1967 2.38048 ) ( 1510 14JL1967 20.11751 I ( 1453 2.AI.1967 C. 16756 1 1 1511 15JL1.67 C. 35387 ) 1SE1967 5.66940 ) ( 1512 ( 1536 E 3 ______ 1SE1967 24SE1967 0.49866 I 8.78006 1 ( 1513 ( 1537 E 5 E 3 31AU1967 24SE1967 C.C9121 ) 3.32097 1 . 1534 _________ A 6 E 5 19SE1967 23SE1967 0.04654 ) 2.12672 ) ( 1539 _________ C 3 ______ 4DC1967 _____________ 0.00503 ) 0.10774 ) ( 1541 ( 1377 E 2 GS 1 11GC1967 9MY1967 1.24528 ) 0.00396 ) ( 1542 _________ E 3 _______ UCC1967 9HY1967 C. 98149 ) ______________ ( 1379 ( 1384 GS 3 _______ 9. Y1967 ____________ 0.00619 ) 0.C0739 ) ( 1380 ( 1385 GS 4 GS 9 9MY1967 10MY1967 0.02354 I C. 00471 1 ( 1382 ( 1386 GS 6 GS10 10MY1967 12HY1967 C.CC278 ) C.C0287 I ( 1387 _________ GS11 GS14 12MY1967 ____________ 0.01584 ) _____________ I 1388 ( 1391 GS12 GS15 12MY1967 12. Y1967 C. 01207 I 0.00479 ) ( 1389 _________ GS13 ________ 12MY1567 12HY1567 C. 01547 1 C. 16334 1 ( 1393 ( 1396 GS17 GS20 13MY1967 13MY1967 0.01918 ) 0.56972 ) ! 1394 ( 1397 GS18 GS21 13MY1967 13MY1967 0.16170 ) 3.29642 ) ( 1395 ( 1398 GS19 GS22 13MY1967 14MY1967 C.32882 ) C.C2125 ) 1 1554 ( 1557 GS 1 GS 4 30C1967 30C1967 6.47548 i 0.16069 1 ( 1555 ( 1558 GS GS 2 5 30C1967 40C1567 7.16808 |- 0.05549 I ( 1556 ( 1559 GS GS 3 7 30C1567 4GC1967 C. 04172 ) C. 03148 I ( 1560 ( 1563 GS 8 GSll 40C1967 50C1967 0.08501 ) 0.00701 ) ( 1561 ( 1568 GS 9 GS16 40C1967 50C1967 0.08217 ) 0.02453 1 ( 1562 ( 1569 GS10 GS17 5DC1967 50C1967 C.C3454 > C. 02527 ) ( 1570 ( 1573 GS18 GS21 50C1967 60C1967 0.01983 ) 0.10^27 ) ( 1571 ( 1574 GS19 GS22 6GC1967 6GC1967 0.17796 ) C. 02301 ) ( 1572 ( 1575 GS20 CS28 60C1967 60C1967 C. 69399 ) C. 07225 ) ( 1544 ( 1546 . U 1 111 1 20C1967 20C1967 0.10246 ) 0.42015 I ( 1547 ( 1521 MS SH 1 1 20C1567 18SE1567 1.40519 ) 0.02308 ) ( 1524 ( 1523 . I RA 1 1 20SE1967 19SE1967 C. 15324 1 C.C1845 ) ( 1525 . _ PU 1 SB 1 20SE1S67 20SE1967 0.04178 1 0.05775 1 ( 1526 ( 1529 MC KW 1 1 20SE1967 20SE1967 C. 35842 I 0.04797 1 ( 1527 ( 1530 TR FR 1 1 20SE1967 24SE1967 C. 08805 1 2.08021 ) ( 1531 ( 1549 GH 1 MO 1 25SE1967 40C1967 0.00845 ) 0.06852 ) ( 1545 ( 1551 ES 1 1 20C1967 50C1967 0.04054 ) 0.08737 ) ( 1548 ( 1552 CA SM 1 1 30C1967 60C1967 C. 01272 ) C. 41598 ) ( 1550 1 1426 MR 1 MS 2 ,50-1967 29MY1967 0.65667 ) 18.64566 ) ( 1553 ( 1351 SG Ml 1 2 60C1967 21AP1967 C. 80053 ) 3.67417 ) ( 1428 ( 1427 . U LU 2 2 29MY1967 29MY1967 3.66386 ) 5.61743 ) ( 1417 J_ 142.5 HO 2 RA 2 TR 2 FR 2 22MY1967 25MY1967 6MY1967 73AP1967 14.53567 ] 1.34382 ) 0.73099 ) 4.21941 ) ( 1418 ( 1399 ( 1400 ( 1354 SH PVi se GH 2 2 2 2 22MY1967 5MY1967 6MY1967 25AP1967 0.07776 ) 3.37323 ) 1.71551 1 6.65573 ) ( 1350 ( 1401 ( 1352 ( 1429 EH .0 KW 2 2 19AP1967 6. Y1967 C, 49338 ) 2.44591 ) ( 1402 I 1353 2 2 21AP1967 29KY1967 4.1230C ) 22.93236 ) ( 1403 ( 1407 CA 2 SM 2 10. Y1967 14MY1967 0.05231 ) 7.35654 ) ( 1404 ( 1349 MC CI 2 2 10MY1967 19AP1967 C.050B1 ) 2.01164 ) ( 1405 ( 1406 ES GB 2 2 12MY1967 13MY1967 1.19324 ) C. 02965 ) ( 1419 __________ BU 2 GA 2 23MY1967 23MY1967 3.51520 ) 2.86108 ) ( 1420 ( 1423 IH UA 2 2 23MY1567 25. Y1967 1.78248 ) 2.53501 ) ( 1421 ( 1424 CH KN 2 2 23MY1967 25MY1967 1.75225 ) 3.62377 ) Diatoma tenue var. paohycephala Grun. D-i-atoma tenue var. paahyoephala Grunow _n: Van Heu_-ck, Syn. Diat. Belgique, pi. 50, fig. 15. 1881. 201 OITENUVP TOT NO OF STATIONS 275 (46910 146917 CH _U. 0C1945 12JA1946 C. 67506 ) 4.55923 ) (46521 (46S15 CH CH 23N01945 20FE1946 2.73235 ) 1.72993 ) (46908 (46914 CK CH DE1945 19AP1946 6.87815 ) 0.41643 ) (46524 (46909 CH CH 10MY1946 MR 1947 0.89381 ) .0,09 107 ). (46523 (46912 CH CH 22N01946 AP1947 0.12895 ) 0.02300 ) [46920 (46916 CH CH 20DE1946 4MY1947 C.C3358 ) 6.41767 ) 63 (46906 1469?? CH CH MY1947 21AU1947 6.85927 1 0.03926 ) (46519 (46758 EV 5JN1947 5JN1937 3.05762 1 0.79880 ) (46907 (46771 CH EV JL1947 11JN1937 C. 73720 1 1.93048 1 (46743 146764 EV EV 20JN1937 17JL1937 0.13274 ) 0.16116 ) (46745 (46757 EV EV 3JL1937 25JL1937 0.06270 ) 0.10110 ) (46770 (46747 EV EV 9JL1937 1AU1937 C. 02982 ) C. 01980 ) (46763 (46750 EV FV 23AU1937 24SE1937 0.02029 ) 0.29222 ) (46765 (46744 EV EV 30AU1937 60C193 7 0.04462 1 4.36988 ) (46760 (46748 EV EV 22SE1937 130C1937 C. 16249 ) C. 08540 ) (46767 (4676? EV EV 270C1937 18MR1938 0.14700 ) 0.C8822 ) (46749 (46751 EV EV 12MR1938 30MR1938 C. 23061 1 1.25056 1 (46768 (46772 EV EV 16MR1938 18AP1938 0.13229 ) 2.58084 ) (46756 (46766 EV EV_ 27AP1938 14DE1938 11.61240 i 5.32319 1 (46759 ( 1225 EV C 6 19MY1938 15MY1964 C. 47265 ) C. 68601 ) (46761 ( 1226 EV C 7 27MY1938 16MY1964 0.33522 1 C. 75909 I ( 1227 1 l?m C F 2 2 13MY1964 16MY1964 0.10308 ) 0.08001 ) ( 1228 ( 1231 D E 2 3 14MY1964 16MY1964 0.03503 ) 0.C146B ) ( 1229 ( 1232 0 E 5 5 14MY1964 16MY1964 .0.13533 ) 0.C1565 ) ( 1233 1 1419 B B 3 6 5JN2964 5JN1964 0.25720 1 0.30769 ) ( 1234 ( 1236 B C 3 1 18JN1964 8JN1964 0.23336 ) 0.07876 ) ( 1235 ( 1237 C C 7 2 16JN1964 8JN1564 C. 05084 ) C. 16241 ) ( 1238 ( 1241 0 F 3 2 11JN1964 13JN1964 0.02800 ) 0.04731 k ( 1239 ( 1242 D E 4 3 11JN1964 13JN1964 0.00812 ) 0.00300 ) ( 1240 ( 1243 D E 6 6 10JN1964 13JN1964 C.C0460 ) C.1C023 ) ( 1244 ( 1247 F R 1 3 11JN1964 14.11 1964 0.11842 ) 0.31587 1 ( 1245 ( 1748 F 8 2 3 11JN1964 24JL1964 C. 01037 ) C. 06306 1 ( 1246 ( 1440 r B 3 . 6 11JN1964 11JL1964 C.0C598 ) C.C5213 1 ( 1441 ( 1251 B C 6 7 24JL1964 16JL1964 0.30838 ) 0.40559 ] ( 1249 ( 1252 C C« 3 1 8JL1964 16JL1964 0.44813 ) 1.26918 ) ( 1250 ( 1253 c c 6 2 10JL1964 16JL1964 C. 52210 ) 0.23279 ) ( 1254 ( 1257 D E 2 3 15JL1964 14JH964 0.26815 ) 0.08135 ) ( 1255 ( 1258 0 F 5 1 15JL1964 6JL1964 C.20789 ) 0.53803 ) ( 1256 ( 1259 E F 2 2 14JL1964 6JL1964 C. 28211 ) C. 55804 ) ( 1260 ( 1442 F B 3 6 6JL1964 2AU1964 0.17954 ) C. 89730 ) ( 1261 ( 1443 B 8 3 6 2AU1964 16AU1964 0.01570 ) 0.13838 1 ( 1262 ( 1263 B C 3 7 17AU1964 15AU1964 0.01680 ) C.C1201 ) ( 1264 ( 1267 C D 1 6 10AU1964 18AU1964 0.15639 ) 0.05837 1 ( 1265 ( 1268 C" E 2 2 10AU1964 15AU1964 0.04024 ) 0.17234 ) 1 1266 ( 1269 D E 3 3 18AU1964 15AU1964 0.18591 ) C. 04659 ) ( 127.0 ( 1273 F 1 2 10AU1964 10SE1964 0.09803 I 0.07527 ) ( 1271 ( 1274 C D 7 1 22SE1964 17SE1964 0.03264 ) 0.00469 ) ( 1272 ( 1275 C« D 1 2 10SE1964 17SE1964 0.0C821 ) C. 03226 ) ( 1276 ( 1279 0 E 3 I 18SE1964 16SE1964 0.03353 ) 0.02356 ) ( 1277 ( 1280 0 E 4 2 18SE1964 16SE1964 0. 00620 ) 0.00681 ) ( 1278 ( 1281 D E 6 3 18SE1964 16SE1S64 1.74872 ) C.C5494 ) ( 1282 ( 1285 E F 4 1 16SE1964 15SE1964 0. 07756 ) 0.03494 ) ( 1283 ( 1286 E F 2 16SE1964 15SE1964 0.10420 ) 0.02189 ) ( 1284 ( 1287 E F 6 3 17SE1964 15SE1964 C. 61322 ) C. 02002 ) ( 1288 ( 1290 B C 3 1 150C1964 160C1964 0.00218 ) 0.02274 ) ( 1445 ( 1291 B C 6 2 140C1964 160X1964 C. 13372 ) 0.00489 ) ( 1289 ( 1292 C 0 7 1 140C1964 150C1964 C. 41335 ) 0.01491 ) ( 1293 < 1296 D D 2 5 150C1964 140C1964 0.06603 I 0.27541 ) ( 1294 ( 1297 D 0 3 6 150C1964 140C1964 0.42522 ) 1.99916 ) ( 1295 ( 1298 D E 4 1 150C1964 120X1964 C.1C703 ) 0.01346 ) ( 1299 ( 1302 E E 2 5 120C1S64 130C1964 0.04084 ) 0.28342 1 ( 1300 ( 1303 E £ 3 6 130C1964 13GC1964 0.05012 ) 5.48528 1 ( 1301 ( 1304 E F 4 1 130C1964 110C1964 C. 27819 ) C.0C494 ) ( 1305 ( 1109 F 2 1 110C1964 10NO1964 0.00173 1 0.02251 ) ( 1307 ( 1310 B C 6 2 ND1964 10N01964 0.38967 ) 0.01361 1 ( 1308 ( 1311 C D 7 1 6N01964 8N01964 1.06451 ) C.1C835 1 ( 1312 ( 1315 0 0 2 5 , 8N01964 9N01964 0.21729 ) 0.60055 ) ( 1313 ( 1316 D D 3 6 9N01964 9N01964 C. 62934 ) 0.52886 I ( 1314 ( 1317 C E 4 1 9N01964 6N01964 C. 44211 ) 0.26806 ) ( 1318 1 1321 E 2 5 7N01964 7N01964 0.29298 ) 0.74698 ) ( 1319 ( 1322 E E 3 6 7N01964 7NC1964 0.15448 ) C. 77982 I ( 1320 ( 1323 E F 4 1 7N01964 6NG1964 0.14478 ) 0.00418 ) ( 1324 ( 1337 F C 2 3 6N01964 2MR1967 0.00466 ) 0.82306 ) ( 1325 ( 1338 F C 3 3 6NG1964 28MR1967 0.05290 ) 0.92558 ) ( 1336 ( 1339 C C 3 5 27JA1967 28MR1967 0.01155 ) C. 12783 1 ( 1340 ( 1343 C A 7 6 28MR1967 19AP1967 1.83247 ) 0.92400 1 ( 1341 ( 1344 A C 3 3 19AP1967 25AP1967 1.51872 ) 0.12904 ) I 1342 ( 1345 A C 4 5 19AP1967 25AP1967 1.51589 1 C. 12280 ) ( 1346 ( 1368 C A 7 3 21AP1967 4MY1967 0.7C100 1 0.04084 1 ( 1347 ( 1369 E A 2 4 23AP1967 4MY1967 0.83570 ) C. 00373 ) ( 1348 ( 1370 E A 5 6 23AP1967 3MY1967 C. 15764 ) C. 24399 ) ( 1372 1 1375 C F 5 3 5HY1967 7MY1967 0.00355 ) 0.00241 ) ( 1373 ( 1376 C E 7 5 5MY1967 6MY1967 0.00856 ) 0.00843 ) ( 1374 ( 1408 E A 2 3 7MY1967 23MY1967 C. 01494 ) C. 06708 ) ( 1409 ( 141? A C 4 5 23MY1967 31MY1967 0.00595 ) 0.00421 ) ( 1410 ( 1413 A C 6 7 24MY1967 25MY1967 0.07330 ) 0.06318 ) ( 1411 ( 1414 C E 3 2 31MY1967 28MY1967 C. 00821 ) C.C4366 ) ( 1415 1 143? E A 3 4 28MY1967 13JN1967 0.00225 ) 0.17881 ) ( 1416 ( 1433 E C 5 3 28MY1967 17JN1967 C. 01093 ) 0.38109 ) ( 1431 ( 1434 A C 3 5 12JN1967 17JN1967 C. 99132 ) C.C1455 ) ( 1435 1 1446 C A 7 3 13JN1967 U.IL1967 0.24311 1 0.62619 ) ( 1436 ( 1447 E A 2 4 15JN1967 1UL1967 0.15198 ) 0.53331 1 ( 1438 ( 1448 E A 5 6 14JN1967 10JL1967 C. 02542 ) C. 90539 ) ( 1449 ( 145? C 3 r ? 16JL1967 14JL1967 1.33746 ) 3.12939 ) ( 1450 ( 1453 C E 5 3 16JL1967 15JL1967 0.66648 I 0.20979 ) ( 1451 ( 1454 C E 7 5 16JL1967 15JL1967 3.85812 ) C. 16603 ) ( 1504 ( 151? . A F 3 3 28AU1967 1SE1967 0.00247 ) 0.02749 ) ( 1509 < 1513 C E 5 5 2SE1967 31AU1967 0.64096 1 0.08615 ) ( 1511 ( 1534 E A 2 6 ISE1967 19SE1967 C, 25478 ) C.C1551 ) ( 1536 E F 2 7 24SE1967 llnr.1967 0.09271 ) 0.03193 ) ( 1537 ( 1542 E E 3 3 24SE1967 110C1967 C. 03019 1 C. 00509 ) ( 1538 ( 1543 E E 5 5 23SE1967 100C196 7 0.02762 1 C. 01437 1 ( 1379 1 13R3 GS GS 3 7 9MY1967 10MY1967 0.02476 1 0.04544 1 ( 1380 ( 1384 GS GS 4 8 9MY1967 10MY1967 0.64739 ) 0.02773 ) ( 1381 ( 1385 GS GS 5 9 10MY1967 10MY1967 C. 16696 ) C. 03296 ) ( 1386 1 1389 GS10 GS13 12MY1967 12MY1S67 0.02011 ) 0.00516 ) ( 1387 ( 1390 GS11 GS14 12MY1967 12MY1967 0.05545 1 0.02349 I ( 1388 ( 1392 GS12 GS16 12MV1967 12MY1967 C.C1207 ) 0.04315 ) ( 1393 I 1396 GS17 _0£20 13MY1S67 13MY1967 0.01918 ) 0.00666 1 ( 1394 ( 1397 GS18 GS21 13MY1967 13MY1967 0.15653 ) 0.14389 ) ( 1395 ( 1398 GS19 GS22 13KY1967 14MY1967 C. 32882 ) 2.12527 ) ( 1554 1 1561 GS GS 1 9 30C1967 4nr.l967 0.33445 ) 0.01174 ) ( 1555 ( 1562 GS 2 GS10 30C1967 50C1967 0.17302 ) 0.01727 ) ( 1556 ( 1563 C-S 3 GS11 30C1967 50C1967 . C.01O43 ) 0.00701 ) ( 1564 ( 1569 GS12 GS17 50C1967 50C1967 0.00823 ) 0.00743 1 ( 1565 ( 1571 GS13 GS1S 50C1967 60C1967 0.00507 ) 0.02868 ) ( 1568 ( 1572 GS16 GS20 50C1967 60C1967 C. 15584 1 C.C0180 ) ( 1573 ( 1547 GS21 MS 1 60C1967 2HC1567 0.00336 ) 0.03194 ) ( 1574 ( 1526 GS22 mo i 60X1967 20SE1967 0.00863 ) 0.01707 1 ( 1544 I 1527 ML> IR 1 1 2CC1967 20SE1967 C. 00238 ) C. 01887 ) ( 1528 t 1545 SB ML 1 1 20SE1967 2rr. 1967 0.01444 ) 0.00676 ) ( 1529 ( 1549 MO 1 1 20SE1967 40C1967 0.02398 I 0.02741 ) ( 1530 ( 1551 FR ES 1 1 24SE1967 5GC1967 0.04000 ) C. 19970 ) ( 1552 ( 1426 SM MS 1 2 60C1967 29MY1967 0.07923 ) 2.01575 1 ( 1553 ( 1351 SG MI 1 2 60C1967 21AP1967 C. 08079 1 4.31963 ) ( 1428 1 1427 MU LU 2 2 29MY1967 29MY1967 19AP1967 6MY1967 C. 15668 ) C.5C847 ) ( 1417 ( 1425 HO BA 2 2 22HY1967 25MY1967 1.01690 1 0.10609 ) ( 1418 ( 1399 SH PW 2 2 22MY1967 5MY1967 0.01555 1 3.37323 ) 1 1350 ( 1401 BH 2 2 C.CC441 ) 1.04069 ) ( 1402 ( 1353 TR FR 2 2 6MY1967 ■23AP1967 1.55945 1 0.07384 ) ( 1400 ( 1354 SB GH 2 7 6MY1967 25AP1967 2.85918 ) C. 27617 1 ( 1352 ( 1429 KW WL 2 2 21AP1967 29MY1967 9.20804 ) C. 98737 ) ( 1403 ( 1407 CA SM 2 2 10MY1967 14CY1967 2.09232 ) 2.57957 ) ( 1404 ( 1419 MQ BU 2 7 10MY1967 23MY1967 C. 24136 ) 0.45771 1 ( 1405 ( 1420 ES IH 2 2 12MY1967 23MY1967 C. 54180 ) 1.4C483 ) ( 1421 1 1424 CH KN 2 2 23MY1967 25HY1967 1.75225 ) 0.38636 ) ( 1422 ( 1430 GA MC 2 2 23MY1967 12JN1967 1.47141 ) 0.19738 ) ( 1423 tiA 2 25MY1967 C. 89068 ) Biatoma vulgaris Bory Diatoma vulgare Bory, Diet. Class, Hist. Nat., 5:461. 1824. 64 ^02 DIVULGAR TCT NC CF STATIONS 73 (46921 CH 23N01945 0.03816 ) 46917 CH 12JA1946 0.01137 I 46915 CH 20FE1946 C.CC565 ) (46914 (46920 CH CH 1SAP1946 20CE1946 0.00961 ) 0.00863 1 46924 469C5 CH CH 10MY1946 JA1947 0. 05079 ) 0.00245 ) 46923 46909 CH CH 22N01946 MR1947 C.C3934 I C.CC455 ) 146916 (46771 CH EV 4MY1947 11JN1937 0.00136 ) ■0.01426 ) 46919 46743 CH EV 5JN1947 20JN1937 0.01214 ) 0.11989 ) 46758 46770 EV EV 5JN1937 9JL1937 C. 33521 ) C.C5367 ) (46764 (46750 EV EV 17JL1S37 24SE1937 0.05641 ) 0.00471 ) 46757 46748 EV EV 25JL1937 130C1937 0.00963 ) C. 02135 ) 46747 46767 EV EV 1AU1937 270C1937 C.0C495 1 C. 00774 ) (46761 ( 1304 EV F 1 27KY1938 '11DC1964 0.00273 ) 0.00247 ) 46766 1341 EV A 3 140E1938 19AP1967 0.01584 1 C. 00217 ) 1300 1348 E 3 E 5 130C1964 23AP1967 C.CC358 ) C.0C137 ) 1 1371 ._..L 15.32 _ C 3 A 3 4MY1967 18SE1967 0.00462 I 0.02300 ) 1415 1541 E E 3 2 28MY1967 110C1967 0.00225 ) C. 00532 1 1432 1382 A 4 CS 6 13JM967 10MY1967 C. 00255 ) C.CC278 ) ( 1387 ( 1554 GS11 GS 1 12MY1967 3DC1967 0.0C396 ) 0.01779 1 1392 1555 GS16 GS 2 12MY1967 3CC1967 0.00308 ) C. 00353 ) 1395 1559 GS19 GS 7 13MY1967 4CC1967 C.0C117 ) C.CC350 ) ( 1564 ( 1571 GS12 GS19 50C1967 60C196 7 0.00494 1 0.00117 ) 1569 1573 GS17 GS21 50C1967 60C1967 C. 00297 ) 0.00224 1 1570 1574 CS18 GS22 5DC1967 60C1567 C.0C992 ) C. 00288 ) ( 1575 . LJL52j4_ GS28 MI 1 60C1967 20SE1967 0.00129 ) 0.02189 ) 1544 1546 MU LU 1 1 20C1967 20C1967 0.00238 ) 0.00500 ) 1547 1521 ns l SH 1 20C1967 18SE1967 C.C3992 1 C. 68082 ) J 1522 „I_.JL545 BH 1 WL 1 18SE1967 2CC1567 0.00912 ) 0.02703 ) 1530 1550 FR MR 1 1 24SE1967 5CC1967 C. 04000 1 C. 16107 ) 1531 1428 GH 1 HU 2 25SE1967 29KY1967 C. 03381 ) C.C3917 ) I 1426 1 1417 MS 2 HQ 2 29MY1967 22MY1S67 0.20997 ) 0.01122 1 1351 1418 MI SH 2 2 21AP1967 22MY1967 0.00310 ) 0.34215 ) 1427 1350 LU 2 EH 2 29MY1967 15AP1967 C. 33898 I C.C4405 1 ( 1399 ( 1400 PW 2 SB 2 UL 2 GB 2 5MY1967 6KY1967 29MY1967 13MY1967 0.01360 ) JL.fl.5361 ) 1401 1353 MC FR 2 2 6PY1967 23AP1967 C. 01176 ) 0.05274 ) 1402 1354 TR 2 GH 2 6MY1967 25AP1967 C. 01083 ) C.01208 ) 1 1429 1 1406 0.03185 ) 0.OC8OS 1 1403 CA 2 10MY1967 0.28769 ) 1405 £S 2 12HY1967 C.0C645 ) Diatoma vulgaris var. brevis Grun. Diatoma vulgare var. breve Grunow, Verh. Zool.-Bot. Ges. Wien, 12:363. 1862. 703 niVIIIGVR TCT MC CF STATIONS 5JN1937 0.00357 ) 8JN1964 C.C0350 ) ( 1264 10AU1964 C.CC193 ) 19AP1967 0.00217 ) ( 1567 50C1967 0.00159 I ( 1521 18SE1967 C. 02885 ) Diatoma vulgaris var. linearis V. H. Diatoma vulgare var. linearis Van Heurck, Syn. Diat. Belgique, pi. 50, figs. 7-8. 1881. 205 DIVULGVL IOT NO CF STATIONS ( 1392 GS16 12MY1967 0.00616 ) ( 1549 MO 1 40C1967 0.12334 ) 1 1407 SM 2 14MY1967 C.0C597 ) Genus Dvploneis Ehr. Ehrenberg, Ber. Akad. Wlss. Berlin, 1844:84. 1844. Members of the genus Di-ploneis find their primary habitat in epipelic communities. Only occasional, isolated specimens are found in our collec- tions . Diploneis boldtiana Cleve Di-ploneis boldtiana Cleve, Acta Soc. Fauna Fl. Fennica, 8(2) :43, pi. 2, fig. 12. 1891. 206 0PB0LDT1 TCT NO OF STATIONS (60973 146910 CH CH 1876 ' 0C1945 0.02362 ) 0.00328 ) ( 3540 (46921 CH CH 11CY1879 23N01945 0.00466 ) 0.00065 1 < 3541 (469C8 CH CH 1FE1881 0E1945 C. 03913 1 C. 01007 ) (46914 (46758 CH FV 19AP1946 5JN1937 0.00214 ) 0.00357 ) (46916 (46764 CH EV 4MY1947 17JL1937 0. 00068 ) 0.00806 ) (46922 (46757 CH EV 21AU1947 25JL1937 C.0C194 ) C.0C481 ) (46747 ( 1565 EV GS13 1AU1937 50C1967 0.00248 ) 0.00507 ) (46768 ( 1567 EV GS15 16MR1938 5CC1967 C. 01470 ) 0.00159 ) ( 1563 1 1530 GS11 FR 1 50C1967 24SE1967 C.0C234 ) C. 01000 ) 65 Diploneis domblittensis (Grun.) Cleve Navioula expleta var. domblittensis Grunow in: Mojsisovics and Neumayer, Beitr. Palaontol. Osterreich-Ungams, Bd. 2, Heft 4, p. 156, pi. 30, fig. 60. 1882. Diploneis domblittensis (Grun.) Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 26 (2): 91, pi. 2, fig. 2. 1894. 207 CPDCKBLC TOT NO OF STATIONS 1 I2PY1*;67 0.0C258 ) Diploneis elliptioa (Kutz.) Cleve Navioula elliptioa Kutzing, Bacill., p. 98, pi. 30, fig. 55. 1844. Diploneis elliptioa (Kutz.) Cleve, Acta Soc. Fauna Fl. Fennica, 8(2) :42. 1891. 20.8 PPELUPT TCT NO OF STATIONS "'"" UI 5K1VU U.PWJJ I 14CS16 tH 4MY194I C.C0C34 I (16907 CH JL1947 C. 00148 ) ( 1559 GS 7 ,4001967 C. 00350 ) ( 1565 GS13 50C1967 0-01014 ) ( 1567 C-S15 50C1967 C.0C476 ) 1 1403 CA 2 10MY1967 0.01308 ) I Diploneis oblongella (Naeg.) Ross Navioula oblongella Naeglei ex Kutzing, Sp. Alg., p. 890. 1849. Diploneis oblongella (Naeg.) Ross, Natl. Mus. Canada Bull., 97:212. 1947. Coll: 1405 Diploneis ooulata (Br£b.) Cleve Navioula ooulata de Br£bisson, J. Quekett Micr. Club, 2:38, fig. 5. 1870. Diploneis ooulata (Bre"b.) Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd 26(2):92. 1894. 209 CPOCULAT TCT NO OF STATIONS 9 146906 Cti PV1947 0.00066 ) (46767 EV 270C1937 0.00387 ) 1 1245 F 2 11JM964 C.CC346 ) ( 1260 F 3 6JL1964 0.00191 ) ( 1285 F 1 15SE1964 0.00582 ) ( 1389 GS13 12MY1967 0.00258 ) 1 1395 GS19 13HY1967 0.00117 ) ( 1554 GS 1 30C1967 C. 00356 ) ( 1565 GS13 5QC1967 C.C3042 ) Diploneis ovalis (Hilse) Cleve Pinnularia ovalis Hilse, Jahres-Ber. Schlesischen Ges. Vaterl. Kult., 36:82. 1860. Diploneis ovalis (Hilse) Cleve, Acta Soc. Fauna Fl. Fennica, 8(2): 44, pi. 2, fig. 13. 1891. 711) npnvAirs tot nt of stations 6 ._( 60973 CH L8_Z6_ 0ji]4_Z2*_l 146924 CH I0PY1946 0.00071 I ( 1285 F 1 15SE1964 0.01 165 ) _ ( 1304 F 1 110C1964 0.00247 ) ( 1389 GS13 12MY1967 0.00774 ) ( 1354 GH 2 25AP1967 C.CC173 ) Diploneis parma Cleve Diploneis parma Cleve, Acta Soc. Fauna Fl. Fennica, 8(2) :43, pi. 2, fig. 10. 1891. 66 211 DPPARfA TCI NO OF STATIONS (46910 l.46A24_ CH r.H ' 0C1945 10MY1946 0.00109 ) 0.00141 1 (46917 _146920_ CH CH 12JA1946 20DE1946 0.00083 ) C. 00031 ) (46914 (46905 CH CH 19AP1946 JA1947 C. 00107 ) C. 00123 ) (46906 ( 13R9 CH GS13 MY1947 12HY1967 0.00066 ) 0.00516 ) (46922 I 1390 CH GS14 21AU1947 12FY1967 0.00145 ) 0.01174 ) ( 1385 ( 1393 GS 9 C-S17 10MY1967 13MY1967 C.CC235 ) C. 00274 1 ( 1564 ( 1569 GS12 GS17 50C1967 50C1967 0.O0165 1 0.00149 I ( 1565 [ 1574 GS13 GS22 50C1967 6CC1967 0.03042 ) 0.00575 I ( 1567 ( 1575 GS15 GS28 50C1967 60C1967 C.0C635 ) 0. 00258 ) 20C1967 0.00500 1 25AP1967 0.00173 ) Diploneis subovalis Cleve Diploneis subovalis Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 26(2):96, pi. 1, fig. 27. 1894. 212 DPSUBOVA TCT NO OF STATIONS 1AU1937 0.00248 ) I 1388 12KY1967 0. 01207 I ( 1565 50C1967 C. 02028 ) Species inaertae sedis Diploneis sp. #1. 213 DPSPECCA TOT NO OF STATIONS ( 1567 GS15 50C1967 0.00159 I ( 1568 50C1967 0. 00144 I ( Diploneis sp. #2. 214 OPSPECOB TCT NO OF STATIONS ( J 545 HL 1 2CC1967 0.00676 ) 1350 BH 19AP1967 0.00220 ) ( Genus Epithemia Br£b. de Br£bisson and Godey, Consid. Diat., p. 16. 1838. Members of the genus Epithemia are particularly adapted for epiphytic growth, usually on the coarser attached algae or on aquatic higher plants. Only occasional isolated specimens appear in our collections. Epithemia andvewsii nom. nov. Epithemia irregularis Andrews, U. S. Geol. Surv. Prof. Paper 523A:22, pi. 3, fig. 22-25. 1966. (non Fritsch and Rich 1925). 215 EPAN0BEW TCT NO OF STATIONS (60973 CH 1876 0.02362 ) (46917 12JA1946 0.00028 ) ( Epithemia argus (Ehr.) Kiitz. Eunotia argus Ehrenberg, Ber. Akad. Wiss. Berlin, 1841:125, pi. 2(4), fig. 7. 1843. Epithemia argus (Ehr.) Kutzing, Bacill., p. 35, pi. 29, figs. 55-56. 1844. Coll: 1092. 67 Epithemia ca>gus var. alpestvis (Wm. Smith) Grun. Epithemia alpestvis Wm. Smith, Syn. British Diat., Vol. 1, p. 13, pi. 1, fig. 7. 1853. Epithemia avgus var. alpestvis (Wm. Smith) Grunow, Verh. Zool.-Bot. Ges. Wien, 12:329, pi. 3, fig. 28. 1862. 216 EPARGUVA TOT NO OF STATIONS 1 I 3541 CH 1FE1881 0.0C978 ) ( Epithemia avgus var. longicornis (Ehr.) Grun. Epithemia longicovnis Ehrenberg ex Pritchard, Hist. Infus., p. 760, pi. 15, figs. 6-9. 1852. Epithemia avgus var. longicovnis (Ehr.) Grunow, Verh. Zool.-Bot. Ges. Wien, 12:329. 1862. Coll: 1092. Epithemia intevmedia Fricke Epithemia intevmedia Fricke in: A. Schmidt, Atlas Diat., pi. 249, figs. 14-18. 1904. 217 EPINTERM TOT NO OF STATIONS (60973 CH I 1552 SM 1 1876 60C1967 0.14171 ) 0.00660 ) (46906 CH ( 1401 WO 2 KY1947 6HY1967 C. 00066 ) 0.00588 ) ( 1567 ( Epithemia smithii Carruthers Epithemia pvobosoidea Wm. Smith, Syn. British Diat., Vol. 1, p. 13, pi. 1, fig. 8. 1853. (non Kutz. 1844). Epithemia smithii Carruthers in: Gray, Handb. British Freshw. Weeds, p. 76. 1864. 218 EPSM1THI TCT NO OF STATIONS 6 I-AC973 CH 1876 0.02362 ) ( 3541 CH 1FE1881 C. 00978 ) (46924 CH 10MY1946 C.0C071 1 (46763 EV 23AU1937 0.02029 ) ( 1285 F 1 15SE1964 0.01165 ) ( 1574 GS22 60C1967 C. 00288 ) ' 219 EPSOREX0 TOT NO CF STATIONS 6 ( 1389 GS13 1 1531 GH 1 12MY1S67 0.00258 ) 25SF1967 0.00845 ) ( 1396 ( 1545 GS20 WL 1 13*Y1967 20C1967 C. 00074 I 0i0O676 ) ( 1574 ( 1550 GS22 PR 1 60C1967 50C1967 C.C0288 ) 0.03717 ) Epithemia tuvgida (Ehr.) Kutz. Navioula tuvgida Ehrenberg. Phys. Abh. Akad. Wiss. Berlin, 1830:64. 1832. Epithemia tuvgida (Ehr.) Kiltzing, Bacill., p. 34, pi. 5, fig. 14. 1844. _i2D FPT1IRGID TCT NT CF STATIONS CH 1FE1881 0.03913 ) 16S61964 C.CC393 ) ( 1555 GS 2 I 1574 CS77 30C1967 _6X£1S6_7„ 0.00353 ) 0.01151 ) ( 1565 ( 1575 GS13 GS28 50C1967 60C1967 0.00507 ) 0.00129 I ( 1567 ( 1352 GS15 KM 2 50C1967 21AP1967 0.00318 C.0C859 68 Epithemia zebra (Ehr.) Klitz. Navioula zebra Ehrenberg^ Abh. Akad. Wiss. Berlin, 1833:262. Epithemia zebra (Ehr.) Kutzing, Bacill., p. 34, pi. 5. 1835. fig. 7(6)a-c. 1844. 222 EP2EERA TCT NC OF STATIONS (60973 I 1529 CH KW 1 1676 20SF1967 0.04724 ) 0.02398 I ( 3541 J 6GC1567 C.CC288 I Epithemia zebra var. poroellus (Kutz.) Grun. Epithemia poroellus Kiitzing, Bacill., p. 34, pi. 5, figs. 18-19. 1844. Epithemia zebra var. poroellus (Kutz.) Grunow, Verh. Zool.-Bot. Ges. Wien, 12:328, pi. 6, figs. 3-4. 1862. ?71 'FP7CB8«P Till NO HF STATIONS afioaia cm ( 15*5 1876 20C1567 0.02362 I 0.00676 ) (46757 _£V_ 25JL1937 0.00481 1 I 1369 4HY1S67 C.0C373 I WL 1 I 1550 MR 1 50C1967 0.01239 ) ( 1401 6H1T1967 C.01176 ) Genus Euoooooneis Cleve Cleve, K. Svenska Vet. -Akad. Handl., Ny Foljd, 27(3): 173. 1895. Members /of the genus Euoooooneis axe. most abundant in benthic communi- ties. Only occasional specimens are noted in our collections. Euoooooneis flexella (Kutz.)-Hust. Cymbella? flexella Kiitzing, Bacill., p. 80, pi. 4, fig. 14. 1844. Euoooooneis flexella (Kutz.) Hustedt in: Pascher, Siissw.-Fl. Mitteleuropas, Heft 10, Aufl. 2, p. 193, fig. 270. 1930. _2JL3 EUFLEXEL TCT NC CF STATIONS 146924 CH 10PY1946 0.00071 1 46516 CH 4CY1947 0.02579 ) 469C6 CH MY1947 C.CCC66 ) (46919 1 1285 CH F 1 5JN1947 15SE1964 0.02276 ) 0.02912 ) 1258 1286 F 1 F 2 6JL1964 15SE1964 0.00472 ) C.01C95 ) 1279 1387 E 1 GS11 16SE1964 12*Y1561 0.00393 1 C.0C396 ) ( 1388 _ JLJL392 GS12 GS16 12MY1567 12MY1567 0.04223 ) 0.00308 1 1389 1353 GS13 GS17 12MY1967 13HY1967 C. 01031 ) C.CC274 ) 1390 1354 CS14 GS18 12MY1967 13*Y1967 0.01174 ) C.0C172 ) ( 1565 l._L574.._ GS13 SS22 M0 2 50C1967 6CC1967 10KY1967 0.01014 ) C. 00575 ) 1567 155C GS15 MR 1 50C1967 5GC1967 0.00794 1 C. 02478 ) 1569 1403 GS17 CA 2 50C1967 1CHY1967 C.0C297 ) C. 05231 ) I 1404 0.03611 } Euoooooneis flexella var. alpestris (Brun) Hust. Aohnanthes flexella var. alpestris Brun, Diat„ Alpes et Jura, p. 30, fig. 26. 1880. Euoooooneis flexella var. alpestris (Brun) Hustedt in: Pascher, Sussw.-Fl. Mitteleuropas, Heft, 10, Aufl. 2, p. 193, fig. 271. 1930. 224 EUFLE>VA TCT NO OF STATIONS 8 1 1565 I 1426 GS13 MS 2 .5CC1967 0.03042 ) 29MY1967 0.01050 ) ( 1551 [ 1417 ES 1 HO 2 5CC1967 22MY1967 C. 00799 ) 0.01122 ) ( 1550 ( 1350 ► R 1 fiH 2 50C1967 19AP1967 C. 06195 ! C.0C661 ) I 1405 ES 2 12MY1567 C. 01535 ) ( 14C7 SP 2 14PY1567 C. 01194 ) ( Euoooooneis lapponioa Hust. Euoooooneis lapponioa Hustedt, Naturw. Untersuch. Sarekgebirges Schwedisch- Lappland, Bd. 3, Bot. Heft 6, p. 549, pi. 17, figs. 8-9. 1924. 69 225 EULAPPCN TOT NC OF STATIONS 25JL1S37 0.00481 i Eucocconeis lapponica var. nindkei (Reim.) Comb. nov. ii Aohnanth.es ninckei Guermeur and Manguin, Osterreichische Bot. Zeitschr., 100(4/5) :541, pi. 1, figs. 10-11. 1953. Aohnanthes tapponica var. ninckei (Guer. and Mang.) Relmer in: Patrick and Reimer, Acad. Nat. Sci. Philadelphia Monogr., 13:259, pi. 16, figs. 29-30. 1966. 226 EULAPPVN TCT NO CF STATIONS 26 (46758 EV ESI... F 1 J^JJ ... GS22 Kk 1 5JN1937 _L5SE1937_ 15SE1S64 50C1967 60C1967 70SF1967 0.00713 ) _.Q.Slin.. 1 0.00582 ) 0.01014 ) (46757 14676_Z EV £V 25JL1937 18MR1938 C. 00481 ) 0.04411 ) 46763 1270 ev f 1 23*01937 10AU1964 C.C8117 I 0.00272 1 ( 1285 1 1565 ( 1304 ( 1567 F 1 GS15 11CC1964 50C1967 0.00247 ) 0.00159 ) 1394 1572 GS18 GS20 13MY196? 60C1S67 20SE1967 50C1967 C.CC172 ) 0.00090 ) ( 1574 1 1579 C. 02013 ) 0.01199 ) ( 1575 ( 1552 GS28 SM 1 60C1967 60C1967 0.00129 ) 0. 00660 ) 1527 1550 TR 1 KR 1 C.CC629 ) C. 18585 ) 1 1426 MS 2 CA 2 SM 2 29MY1967 10MY1967 14MY1967 0.01050 ) 0.05J31 1 0.00597 ) ( 1350 J_ 14C4 BH 2 HO 2 19AP1967 10MY1967 0.00220 I C. 05081 1 1400 14C5 SB 2 ES 2 6MYI967 12MY1967 C.0C596 ) C.C129C ) 1 1407 ( 1421 CH 2 23MY1967 0.01735 ) Genus Eunotia Ehr. Ehrenberg, Ber. Akad. Wiss. Berlin, 1837:44. 1837. Members of the genus Eunotia find their primary habitat in benthic communities. The majority of species are found only in waters of relatively low pH and total dissolved solids. The specimens taken in the Lake Michigan plankton are undoubtedly derived from either benthic habitats in the lake or, more likely, from streams entering the lake, Eunotia arcus Ehr. Eunotia arcus Ehrenberg, Ber. Akad. Wiss. Berlin, 1837:45, 1837. 227 ENARCUS TOT NO OF STATICNS 1 ( 1565 GS13 50C1967 0.0C5C7 ) I Eunotia arcus var. bidens Grun. Eunotia arcus var. bidens Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 34, fig. 7. 1881. 229 ENARCUVB TOT NO CF STATIONS 3 I 1388 GS12 12MYIS67 0.00603 I ( 1524 MI 1 20SE1967 0.02189 ) ( 14C4 K0 2 10KV1961 C. 02541 Eunotia arcus var. faVlax Hust. Eunotia arcus var. fallax Hustedt in: Pascher, Sussw.-Fl. Mitteleuropas, Heft 10, Aufl. 2, p. 175, fig. 219. 1930. 228 ENARCUVF TCT NO OF STATIONS 1 (46768 EV 16MR1938 0.C147C ) ( 70 Eunotia aurvata (Kutz.) Lagerst. Synedra lunaris Ehrenberg, Abh. Akad. Wiss. Berlin, 1831:87. 1832. Exilaria ourvata Kutzing, Alg. Dec., No. 112. 1834. Eunotia lunaris (Ehr.) Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 35, figs. 3-4. 1881. (non de Brebisson. 1864). Eunotia cuvvata (Kutz.) Lagerstedt, Ofv. K. Svenska Vet. -Akad. Forh., 41(2):61. 1884. 230 ENCURVAT I0T NO OF STATIONS 2 ( 1550 HR 1 50C1967 0.01239 ) ( 1427 LU 2 2<>m?67 0.01211 » t Eunotia diodon Ehr. Eunotia diodon Ehrenberg, Ber. Akad. Wiss. Berlin, 1837:45. 1837. 231 ENDI0DCN TCT NO OF STATIONS 1 TT404 H0~~2 10MYI967 0Tc"l27C ~i T Eunotia exigua (Br£b.) Rabh. Himantidium exiguum de Br£bisson ex Kutzing, Sp. Alg., p. 8. 1849. Eunotia exigua (Br£b.) Rabenhorst, Fl. Europaea Alg., Sect. 1, p. 73. 1864. Coll: 1404. Eunotia flexuosa Breb. Eunotia flexuosa de Brgbisson ex Kutzing, Sp. Alga,p. 6. 1849. 232 ENFILEXUO TOT NO OF STATIONS 1 ( 1574 ~~ GS22 60CT967 (T.00288 ) T Eunotia inoisa Wm. Smith Eunotia inoisa Wm. Smith ex Gregory, Quart. J. Micr. Sci., 2:96, pi. 4, fig. 4. 1854. 233 ENINCISA TOT NO OF STATIONS 1 ( 1417 HO 2 22MY1S67 6700374 1 ('" Eunotia naegelii Migula •^ -.Eunotia naegelii Migula in: ThomS, Fl. Deutschland, 2(1): 203. 1907. 234 ENNAEGEL TCT NO OF STATIONS 1 I 1404 HO 2 10MY1967 57c6352~) T 71 Eunotia pectinalis (0. F. Mull.) Rabh. Conferva pectinalis 0. F. Milller, Nova Octa Acad. Sci. Petropolitane, 3(Hist.):91, pi. 1, figs. 4-7. 1788. Eunotia pectinalis (0. F. Mull.) Rabenhorst, Fl. Europaea Alg., Sect. 1, p. 73. 1864. Coll: 1404. Eunotia pvaevupta Ehr. Eunotia praevupta Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:414. 1843. 235 ENPRAERU TCT NO OF STATIONS 4 ( 1304 F 1 11CC1964 0.00247 ) ( 1388 GS12 12HY1967 C. 00603 ) ( 1569 GS17 5CC1S67 C.0C149 I _I_L5_5JL S£_l 6DC1967 0.00734 ) ( Eunotia sevva Ehr. Eunotia sevva Ehrenberg, Ber. Akad. Wiss. Berlin, 1837:45. 1837. Coll: 1092. Eunotia tvinaovia Krasske Eunotia tvinaovia Krasske, Bot. Arch., 27:349, fig. 1. 1929. — 234 FKTRINif. TOT NO OF STATIONS 1 _1 1404 fO ? 10HY1967 0.C127C ) ( Genus Fvagilavia Lyngb. Lyngbye, Tent. Hydrophyt. Danicae, p. 182. 1819. Fvagilavia bvevistviata Grun. Fvagilavia bvevistviata Grunow in: Van Heurck, Syn. Diat. Belgique, p. 157, pi. 45, fig. 32. 1885. Cells rectangular, in life united by the valve faces into band-shaped colonies of varying length. Valves linear with subrostrate apices, speci- mens from Lake Michigan 10-30y long, 3-5y broad. The striae are short, mar- ginal, slightly radiate, about 13-16 in 10y. Due to the shortening of the striae the pseudoraphe is a broad, linear-lanceolate space, without orna- mentation, occupying most of the valve surface. Most of our records of this taxon come from inshore areas in Lake Michigan. Published records indicate that it reaches its greatest abun- dance in smaller mesotrophic to eutrophic lakes. 737 FRRRFVTS TOT NO OF STATIONS 55 1611971 r.H 1R76 0.04724 1 (46921 CH 23N01945 0.00129 ) (46909 CH MR1947 C.0C4S5 ) (46906 CH HY1947 0.00066 ) (46763 < 1275 £V 0 2 23AU1937 17SF1964 0.02029 ) 0.00645 1 ( 1227 I 1779 C 2 E 1 13MY1964 16SE1964 C.CC110 ) C.C1178 ) 72 ( 1284 I 1304 E 6 F 1 17SE1964 llnr.1964 0.00318 ) 0.00247 ) 12B5 1342 f 1 A 4 15S>tl964 19AP1967 U. 01f47 ) 0.00361 ) 1292 1411 0 1 C 3 150C1964 31MY1967 0.00373 ) C.CC410 ) I 1538 1 1390 E 5 GS14 23SE1967 12MY1967 0.00552 ) 0.00587 ) 1388 1392 GS12 GS16 12KY1967 12MY1967 0.01207 ) 0.01233 ) 1389 1394 GS13 C-S18 12MY1967 13MY1967 C.CC258 1 C.CC344 1 ( 1395 GS19 13MY1967 0.00117 ) 1396 GS20 13MY1967 0.00592 1 1397 CS21 13HY1967 C.OC065 ) f 1 398 GS2? 14MY1967 0.00304 ) 1565 CS13 5(iri967 C. 07606 ) 1567 CS15 5CC1967 C.0C159 ) ( 1569 { 1573 GS17 GS21 50C1967 60C1967 0.00149 ) 0.00672 ) 1570 1574 GS18 GS22 5DC1967 6CC1967 0.00992 ) C. 02013 1 1572 1575 C-S20 C-S28 60C1967 60C1967 C.C1352 ) C.0C516 ) 1 1544 ( 1521 MU 1 -ShLJ. 2CC1967 18SE1967 0.00477 ) 0.0C577 ) 1546 1526 LU 1 MG 1 20C1967 20SE1967 C. 02001 ) 0.01138 ) 1520 1527 hG 1 TR 1 16SE1967 20SE1967 C. 26875 ) C.0C629 ) < 1531 1 1550 GH 1 MB 1 25SE1967 50C1967 0.01691 1 1.96241 ) 1545 1553 WL 1 SG 1 20C1967 6CC1967 0.04730 1 0.03672 ) 1552 1428 SM 1 NU 2 6CC1967 29MY1967 C. 02641 ! C.0C603 ) < 1426 ( 1350 MS 2 BH 2 29MY1967 19AP1967 0.02100 ) 0.63435 1 1351 1401 MI 2 MC 2 21AP1967 6MY1967 0.00310 ) 0.01176 ) 1417 1352 1-0 2 KM 2 22MY1967 21AP1967 0.04486 ) C.0C859 ) ( 1354 _i_Jj4Q4 '. GH 2 GB 2 25AP1967 13MY1967 0.00518 ) 0.00270 ) 14C4 MQ 2 10MY1967 C. 05081 ) 1407 SM 2 14MY1967 C. 02388 ) Fragilaria brevistriata var. capitata Herib. Fragilaria bvevistriata var. inflata Heribaud, Foss. Diat. Auvergne, vol. 2, p. 92, pi. 12, fig. 18. 1903. The valves of this entity are lanceolate with subcapitate to capitate apices. All other features are as in the nominate variety. Grunow's prior figure of F. brebistriata var. suboapitata (in Van Heurck 1881) is apparently without standing because of his failure to either figure or describe the nominate variety until 1885 (for discussion see Patrick and Reimer 1966) . Coll: 827. Fragilaria bvevistriata var. inflata (Pant.) Hust. Fvagilaria inflata Pantocsek, Res. Wiss. Erforsh. Balatonsees, vol. 2, p. 79, pi. 9, figs. 219-221. 1902. Fragilaria brevistriata var. inflata (Pant.) Hustedt in: Pascher, Sussw.-Fl, Mitteleuropas, Heft 10, Aufl. 2, p. 145, fig. 152. 1930. The valves of this entity are elliptic-lanceolate with rostrate to sub- capitate ends. Other features as in the nominate variety. _J3_8._...KmRiVJU__LCL_N0_0F_Uj»i ( 1532 I 1565 A 3 GS13 ( 1522 BH 1 . < 1549 M0 1 ( 1428 MU 2 _L_L4 QA MO ? 17JL19?7 0.0161? ) 18SE1967 50C1967 0.00329 ) C. 07099 I 18SE1967 40C1967 0.00182 ) 0.01370 ) 29MY1967 _JJJJ«Y19A7_. 0.00603 ) 0.01270 ) 1396 1569 1526 1552 GS20 GS17 M0 SM 13MY1967 5CC1967 20SE1967 60C1967 0. 00370 ) COO 149 ) 0.00569 ) C. 01321 ) 1398 1571 1530 1550 GS22 GS19 FR ► R 14MY1967 6CC1967 24SE1967 50C1967 C. 00304 ) C.CC117 ) C.C1000 I C.C4956 ) C. 01542 ) Fragilaria oapuoina Desm. Fragilaria oapuoina Desmazieres, Plant. Crypt. Nord France, 1st. ed., Fasc. 10, no. 453. 1825. 73 Cells rectangular, in life united into closely appressed, band-shaped colonies by the valve faces. Specimens from Lake Michigan 15-80u long, 2-5u broad. Valves linear with bluntly rounded, usually more or less cuneate apices. Striae perpendicular to the midline of the valve throughout its length, 14-18 in lOu, without visible substructure. Pseudoraphe linear, narrow, at the center of the valve expanded into a transverse fascia some- times extending to the margin of the valve. In specimens in which the fascia does not reach the margin of the valve it is irregularly bordered by in- distinct striae. In Lake Michigan this entity is common in collections from inshore areas, and occasional populations are found in collections from the open lake. Published reports indicate that it reaches its greatest abundance in meso- trophic to eutrophic lakes. FP.fAPUCI mi NO OF STATIONS 318 16(1973 r.H 1876 0.23618 ( 3540 CH 11MY187S 0.04659 1 ( 3541 CH 1FE1881 0.C1956 ) 1 3507 (469(18 CH r.H 19FE1881 0F1945 0.05660. 0.65458 (46910 (46917 CH CH CC1945 12JA1946 0.04806 1 C. 03022 I (46921 (46915 CH CH 23N01945 20FE1946 C. 04656 ) 0.26177 ) (46914 (46920 CH r.H CH r.H 19AP1946 70DF1946 AP1947 5.IN1947 0.07688 0.86114 (46924 (46905 CH CH 10MY1946 JA1947 0.55026 1 4.30200 ) (46923 (46909 CH CH 22N0194C MR1947 1.77689 ) 0.09562 I (46912 (46919 2.74807 0.02124 (46916 (46907 CH OH 4NY1947 J11947 0.01221 ) 1.02568 ) (46906 (46913 CH CH MY1947 6AU1947 C. 47454 ) 5.10407 ) (46922 146743 CH FV 21AU1947 70.1N1937 1.48059 7.15809 (46758 (46745 EV FV 5JN1937 3JL1937 0.22110 I 7.60711 ) (46771 (46770 EV FV 11JN1937 9JL1937 C. 13314 1 4.50859 1 (46764 (46763 EV FV EV EV 17JL1937 73AU1937 15SE1937 60C1937 10.60435 0_t6_C877_l (46757 (46765 EV FV 25JL1937 30AU1937 2.29166 ) 0. 01115 1 (46747 (46769 EV EV 1AU1937 7SE1937 3.4656C 1 C. 08684 ) (46752 (46744 0.82717 1.91182 (46760 (46748 EV EV 22SE1937 130C1937 1.10296 ) C. 49103 ) (46750 (46767 EV FV 24SE1937 270C1937 1.45167 ) C. 43325 ) (46749 (4675! EV EV 12HR1938 30MR1938 0.40053 0.02233 (46768 (46772 EV EV 16MR1938 18AP1938 C. 58798 I 0.03549 ) (46762 (46756 EV EV 18MR1938 27AP1938 C. 02206 ) C. 01343 ) (46759 ( 1773 EV B C a 1 7 5 19MY1938 18MY1964 16MY1964 14MY1964 0.01013 0.0C938 (46761 ( 1224 EV B 4 27MY1938 18MY1964 C. 19078 ) 0.00392 ) (46766 ( 1225 EV C 6 14DE1938 15MY1964 2.94677 ) C. 14112 ) ( 1226 ( 1779 0.45282 OlU630 ( 1227 (_1230 ( 1234 ( 1236 C E 2 2 13CY1964 16MY1964 0.09102 ) 0.48896 ) ( 1228 ( 1232 D E 2 5 14MY1964 16MY1964 C. 12262 ) 0.07826 ) ( 1233 1 1439 B R 3 6 5JN2964 5JN1964 0.04048 0.1C589 B C 3 1 18JN1964 8JN1964 0.21649 ) C. 49009 1 ( 1235 ( 1237 C C 7 2 16JN1964 8JN1964 0.72302 ) C. 16499 I ( 1238 ( 1741 D E_ 3 ? 11JN1964 13JN1964 C. 09000 0.51749 ( 1239 ( 1242 0 E 4 3 11JN1964 13JN1964 C. 20308 1 0.00599 ) ( 1240 ( 1243 0 E 6 6 10JN1964 13JN1964 C.C8130 ) C.C7517 ) ( 1244 ( 1747 F B 1 3 11JN1964 14JI. 1964 0.84427 0.02561 ( 1245 ( 1248 F B 2 3 11JN1964 24JL1964 C. 32501 1 0.00788 ) ( 1246 ( 1440 F B 3 6 11JN1964 11JL1964 C.C5379 1 C. 27269 ) ( 1441 1 1751 B C 6 7 24JL1964 16.IL1964 0.12996 0.8807C ( 1249 ( 1252 C c 3 1 8JI-1964 16JC1964 0.38023 ) 0.35425 I ( 1250 ( 1253 C C 6 2 10JL1964 16JL1964 C. 37410 1 C. 08673 ) ( 1254 ( 1757 D E 2 3 15JL1964 14JL1964 0.10151 0.00957 ( 1255 ( 1258 0 F 5 1 15JL1964 6JL1964 C. 01797 1 1.65184 ) ( 1256 ( 1259 E F 2 2 14JL1564 6JL1964 C. 12823 I C. 43381 ) ( 1260 ( 1447 F B 3 6 6JL1964 2AU1964 0.24830 0.15353 ( 1261 ( 1443 B B 3 6 2AU1964 16AU1964 0.02747 ) 0.01581 ) ( 1262 ( 1263 B C 3 7 17AU1964 15AU1964 C. 00840 ) C.0C8O1 ) ( 1264 C D 1 6 10AU1964 18AII1964 0.09654 (1.03891 ( 1265 ( 1268 C" F ? 10AU1964 15AU1964 C. 06483 ) 0.03556 1 ( 1266 ( 1269 0 E 3 3 18AU1964 15AU1964 C. 01052 ) C.CC822 1 ( 1270 ( 1272 F C 1 1 10AU1964 10SE1964 0.08713 0.30374 ( 1444 ( 1273 B C 6 2 19SE1964 10SE1964 0.00303 ) C. 01075 ) ( 1271 ( 1274 C D 7 1 22SE1964 17SE1964 C.61370 ) 0. 03284 ) ( 1275 ( 1278 0 0 2 6 17SE1964 18SE1964 0.07096 0.10377 ( 1276 ( 1279 0 E 3 1 18SE1964 16SE1964 0.04470 ) 0. 10995 1 ( 1277 ( 1280 0 E 4 2 18SE1964 16SE1964 C. 03718 ) C. 00681 ) ( 1281 ( 1284 E E 3 6 16SE1964 17SE1964 0.00785 3.78102 ( 1282 1 1285 E F 4 1 16SE1964 15SE1964 0.02216 ) C. 04659 ) ( 1283 ( 1286 E F 5 2 16SE1964 15SE1964 C. 07969 ) C.C4378 ) ( 1287 ( 1289 F C 3 7 15SE1964 140C1964 0.01501 0.13632 ( 1288 ( 1290 B C" 3 1 150C1964 160C1964 1.14284 1 2.91832 } ( 1445 ( 1291 B C« 6 2 140C1964 16CC1964 C. 05871 ) 1.02735 ) ( 1292 ( 1795 0 D 1 4 150C1964 150C1964 0.52177 0.24379 ( 1293 ( 1296 D 0 2 15GC1964 140C1964 C. 01415 1 0.03147 1 ( 1294 ( 1297 0 0 3 6 150C1964 14CC1964 0.11867 1 C. 03998 ) ( 1298 ( 1301 £ E 1 4 120C1964 130C1964 0.32044 0.02208 ( 1299 ( 1302 E E 2 5 120C1964 130C1964 0.43984 ) 1.41712 ) ( 1300 ( 1303 E E 3 6 130C1S64 130C1964 C. 12529 ) 1.95903 ) ( 1304 1 1307 F B 1 6 HOC 1964 NO 1964 0.01235 0.06494 ( 1305 ( 13C8 F C 2 7 110C1964 6N01964 0.02588 ) C. 11558 I ( 1306 ( 1309 F C 3 1 110C1964 10NC1964 C. 01109 ) C. 28139 ) ( 1310 I 1313 C D 2 3 10N01964 9N01964 0.20635 0.02703 ( 1311 ( 1314 0 D 1 4 8N01964 9N01964 C. 22703 ) 0.03732 1 ( 1312 ( 1315 D D 2 5 8NC1964 9N01964 C. 43458 I C.C2730 ) ( 1316 0 E 6 3 9N01964 7N01964 0.24176 0.02356 ( 1317 1 1320 E E 1 4 6N01964 7N01964 C. 04021 ) 0.05171 I ( 1318 ( 1321 E E 2 5 7N01964 7N01964 C.C3995 1 C. 44691 ) ( 1322 E F 6 3 7N01964 6N01964 0.46656 0.07053 ( 1323 ( 1336 F C 1 3 6N01964 27JA1967 0.01254 ) 0. 00578 ) ( 1324 ( 1337 F C 2 3 6N01964 2MR1967 C.C3028 ) C. 41153 ) ( 1338 C A 3 3 28MR1967 19AP1967 0.07405 0.05424 ( 1339 ( 1342 C A 5 4 28MR1967 19AP1967 0.00624 ) 0. 00361 I ( 1340 ( 1343 C A 7 6 28MR1967 19AP1967 C.2C361 ) C. 15840 ) ( 1344 ( 1347 ( 1369 ( 1373 ( 1376 ( 1410 C e A C E A 3 2 25AP1967 23AP1967 0.02316 0.00976 ( 1345 ( 1348 C E 5 5 25AP1967 23AP1967 0. 00390 ) 0.04249 ) ( 1346 ( 1368 C A 7 3 21AP1967 4MY1967 C. 11750 ) C.C6598 I 4 7 5 6 4MY1967 5MY1967 6MY1967 24MY1967 0.00745 0.00570 ( 1370 ( 1374 A E 6 2 3MY1967 7MY1967 0.64449 1 C. 02092 1 ( 1371 ( 1375 C E 3 3 4MY1967 7MY1967 C. 02539 1 C. 00241 ) 0.10962 _0jJ973_4_ ( 1408 ( 1411 A C 3 3 23KY1567 31HY1967 0.08049 ) 0.03282 ) ( 1409 ( 1412 A C 4 5 23MY1967 31MY1967 C.CC298 ) C.0C842 ) ( 1413 C 7 25HY1967 0.01895 0.03718 ( 1414 ( 1431 E A 2 3 28MY1967 12JN1967 0.00336 1 0.12359 ) ( 1415 ( 1432 E A 3 4 28MY1967 13JN1967 C.CC45C ) C.C1533 1 ( 1433 C 3 17JN1967 0.11626 0.00724 ( 1434 ( 1437 C E 5 3 17JN1967 15JN1967 0.00598 I 0.00538 ) ( 1435 ( 1438 C E 7 5 13JM967 14JN1967 3.31513 ) C. 14887 ) ( 1446 _L_L449_ ( 1452 ( 1504 A r. E A 3 3 2 3 11JL1967 16JL1967 14JL1967 28AU1967 0.31065 0.15667 ( 1447 ( 1450 A C 4 5 11JL1967 16JL1967 0.65494 ) 0.00190 1 ( 1448 ( 1451 A C 6 7 10JL1567 16JL1967 4.85234 ) 14.74351 1 4.47056 0.12344 ( 1453 ( 1506 E A 3 6 15JU967 29AU1967 0.01264 ) 2.74625 ) ( 1454 ( 1509 E C 5 5 15J11967 2SE1967 2.8C056 ) 0.01514 ) 74 1 1510 1 1513 C F 7 5 29AU1967 31AU1967 0.11065 ) 1.18577 1 1511 1532 E A 2 3 1SE1967 18SE1967 C. 53719 ) 4.13915 ) 1512 1533 E A 3 4 1SE1967 19SE1967 C. 24737 ) 1.2C230 ) ( 1534 1 1537 A e: 6 3 19SE1967 24SE1967 4.77771 ) 0.06038 ) 1535 1538 C E 7 5 20SE1S67 23SE1967 2.59117 ) 0.17124 ) 1536 1539 E C 2 3 24SE1967 40C1967 C. 35175 ) 1.72587 ) ( 1540 I 1543 c F 5 5 40C1967 i one 1967 C. 66015 ) 0.35914 ) 1541 1377 E GS 2 1 110C1967 5MY1967 2.60763 ) 0.05541 ) 1542 1378 E GS 3 2 HCC1967 9HY1967 C.C6611 ) C. 18082 ) ( 1379 I 13R? GS OS 3 6 9PY1967 10MY1967 2.38301 ) 0.38858 1 1380 1383 GS GS 4 7 9HY1967 10MY1967 0.58853 ) 3.18114 ) 1361 1384 GS GS 8 10MY1967 10HY1967 C. 61060 ) C. 64701 ) ( 1385 I 13RR GS 9 GS1? 10MY1967 12MY1967 1.64818 ) 15.62594 ) 1386 1389 GS10 GS13 12MY1967 12KY1967 1.00546 ) 53.24496 ) 1387 1390 GS11 GS14 12NY1967 12MY1967 1C. 81274 ) 43.15912 I ( 1391 ( 1394 GS15 GS18 12MY1967 13MY1567 25.47527 I 49.6C951 ) 1392 1395 GS16 GS19 12PY1967 13MY1967 33.22340 1 38.47147 1 1393 1396 GS17 GS2C 13HY1967 13MY1967 26.76396 I 41.07135 ) ( 1397 ( 1555 GS21 GS 2 13MY1967 3DC1967 30.90396 ) 0.10946 ) 1398 1556 GS22 GS 3 14MY1967 30C1967 6.80086 S C.49017 ) 1554 1557 GS GS 1 4 30C1967 30C1967 C. 26329 ) 0.06353 ) ( 1558 1 1561 GS GS 5 9 40C1967 40C1967 0.25369 I 0.02935 ) 1559 1562 GS 7 GS10 4CC1967 50C1967 0.04896 ) C. 03454 ) 1560 1563 GS 8 GS11 40C1967 5CC1967 C. 02834 ) C.C6313 ) ( 1564 1 1567 GS12 GS15 5DC1967 5nr.l967 0.32919 ) 1.11139 1 1565 1568 GS13 GS16 50C1967 50C1967 0.18254 I 1.41412 ) 1566 1569 GS14 GS17 50C1967 50C1967 C. 70629 ) 6.86754 1 ( 1570 ( 1571 GS18 K 7.69627 ) 1402 1353 TR FR 2 2 6MY1967 23AP1967 5.80463 ) 1.85654 1 ( 1354 ( 1404 GH HO 2 25AP1967 10MY1967 2.37508 ) 13.82114 ) 1429 1405 WL ES 2 2 29MY1967 12NY1967 8.49347 ) 65.63467 1 1403 1407 CA SM 2 ? 10KY1967 14MY1967 2.51079 ) 31.81465 ) ( 1349 ( 1470 CI IH 2 ? 19AP1967 P1KY1967 1.14951 1 7.97583 1 1406 1421 GB CH 2 2 13MY1S67 23HY1967 5.47783 ) 5.55170 1 1419 1422 BU GA 2 2 23KY1967 23KY1967 5.56573 ) 9.23721 1 ( 1423 MA 2 25MY1967 25.89816 ) 1424 KN 2 25KY1967 13.85558 1 1430 PC 2 12JN1967 1.5544C 1 Fragilaria oapuoina var. lanoeolata Grun. Fragilaria oapuoina var. lanoeolata Grunow in: Belgique, pi. 45, fig. 5. 1881. Van Heurck, Syn. Diat. Valves elongate, lanceolate, evenly narrowed from near the center to the ends. Ends usually slightly capitate. Other features the same as in the nominate variety. Although this entity has essentially the same distribution as the nomi- nate variety in Lake Michigan, it is usually more abundant in offshore col- lections. As is true of many taxa in the genus, the shape of the valve is quite variable. 240 FRCAPUVL TOT NO OF STATIONS 142 (46910 (46915 CH CH 0C1945 20FE1946 0.00328 ) 0.18210 ) (46921 (46914 CH CH 23f«C1945 19AP1946 0.01631 ) 0.08649 ) (46917 (46924 CH CH 12JA1946 10HY1946 0.02246 ) 0.41269 ) (46923 1*6909 CH CH 22NQ1946 MR1947 2.20090 ) 0.02732 1 (46920 (46912 CH CH 20DE1946 AP1947 0.68090 I 0.05749 1 (46905 (46916 CH r,n JA1947 4HY1947 C. 02451 ) 0.05497 ) (46906 (46913 CH CH MY1947 6AU1947 0.03916 ) 0.09413 1 (46519 (46922 CH CH 5JN1947 21AU1947 0.00607 1 0.34652 ) (46907 (46758 CH EV JL1947 5JN1937 C. 35258 ) 0.01426 ) (46771 (46764 EV EV 11JN1937 17JL1937 0.12125 1 0.03223 1 (46743 (46757 EV EV 20JN1937 25JL1937 0.26548 1 0.02407 ) (46770 (46747 EV EV 9JL1937 1AU1937 C. 31011 ) 0.15348 I (46765 146760 EV EV 30AU1937 22SE1937 0.34579 ) 1,19159 ) (46769 (46750 EV EV 7SE1937 24SE1937 0.02171 ) C. 07541 ) (46752 (46744 EV EV 15SE1937 60C1937 0.02177 ) 0.68279 ) (46767 (46762 EV FV 270C1937 1RHR1938 1.40807 ) 0.26467 1 (46749 (46751 EV fV 12PR1938 30KR1938 0.80107 I 0.03350 ) (46768 (46772 EV EV 16MR1938 18AP1938 0.04410 ) C. 12775 ) (46756 146766 EV EV 27AP1938 14DE1938 0.02183 ) 1.15653 ) (46759 ( 1234 EV B 3 19MY1938 18JN1964 C. 08778 ) 0.00843 ) (46761 ( 1439 EV B 6 27MY1938 5JN1964 C. 71405 ) 0.00599 ) ( 1237 ( 1241 C E 2 2 8JN1964 13JN1564 0.01289 ) 0.00296 ) ( 1238 ( 1243 C E 3 6 UJN1964 13JN1964 0. 00400 ) C.C1670 ) ( 1239 ( 1244 D F 4 1 11JN1964 11JN1964 C.0C232 ) C.0C548 ) ( 1245 1 1440 F R 2 6 11JN1964 11.11 1964 C.0C692 ) 0.05528 1 ( 1247 ( 1441 6 B 3 6 14JL1964 24JL1964 0.01281 I 0.00441 ) ( 1248 ( 1249 B C 3 3 24J11964 8JL1964 C.C1182 ) C. 00543 ) ( 1250 1 1253 C C_! 6 ? 10JL1964 16JL1564 0.00822 ) 0.00913 ) ( 1251 ( 1254 C 0 7 2 16JL1964 15JL1964 0.04925 1 0.01532 ) ( 1252 ( 1255 C> D I 5 16JL1964 15JL1964 C. 09484 ) C. 00513 ) 1 1256 ( 1261 E B 2 3 14JH964 2AU1964 0.00550 ) 0.00196 ) ( 1258 ( 1442 F B 1 6 6JL1964 2AU1964 C.OO708 ) 0.02047 ) 1 1259 ( 1443 F B 2 6 6JL1964 16AU1964 0.CC62O ) 0.00198 ) ( 1264 ( 1767 C" D 1 6 10AU1964 18AU1964 0.08109 ) 0.00865 1 ( 1265 ( 1268 C« E 2 2 10AU1964 15AU1964 0.00894 ) 0.0O547 ) ( 1266 ( 1270 0 F 3 1 18AU1964 10AU1964 C.0C351 ) 0.00272 I ( 1271 ( 1283 C 7 5 22SE1964 16SF1964 0.01306 ) 0.01226 ) ( 1272 ( 1288 C> 8 1 3 10SE1964 150C1964 C.0O41O ! 0.01306 ) ( 1282 ( 1445 E B 4 6 16SE1964 14GC1964 0. 01108 ) 0.04566 ) I 1289 -L 129? ( 1296 l i inr\ C 7 „_D_1_ 140C1964 15DC1964 0.02199 ) _0.00373_)__ ( 1290 _L12S3_ C 1 0 2 160C1964 150C1964 0.00379 I 0.01415 1 ( 1291 ( 1294 160C1964 150C1964 0.00734 I C.0C659 1 140C1964 unr. l 964 0.01180 ) n. 01432 1 ( 1298 ( 1301 E I E 4 12CC1964 130C1964 C. 00269 I 0.00883 I ( 1299 ( 1302 E 2 E 5 120C1964 130C1964 C.C1685 ) C..0081O ) 75 ( 1303 ( 1310 E 6 c« 2 130C1964 10N01964 0.02239 J 0.00227 ) 130b 1312 F D 2 2 11UU1964 8N01964 0.00173 1 0.00621 ) 1308 1316 C 7 C 6 6N01964 9N01964 C. 02433 1 C. 00756 1 ( 1317 ( 1321 E 1 F 5 6N01964 7N01964 0.00766 ) 0. 00638 ) 1318 1322 E E 2 6 7N01964 7N01964 C. 00380 ) 0.02999 1 1320 1323 E 4 F 1 7N01964 6N01964 0.00620 ) C.CC557 ) ( 1324 ( 1340 F 2 C. 7 6N01964 28MR1967 0.00699 ) 0.00073 1 1337 1343 C A 3 6 2MR1967 19AP1967 0.00294 ) 0.00208 ) 1339 1375 C 5 E 3 28MR1967 7KY1967 0.00312 ) C.0C241 ) ( 1414 1 1512 6 2 F 3 28MY1967 1SE1967 0.00336 ) 0.00393 ) 1448 1532 A A 6 3 10JU967 18SE1967 0.01061 ) 0.00329 ) 1454 ( 1533 E 5 A 4 15JL1967 19SE1967 C.0C800 ) 0.00928 ) ( 1535 I 154? C 7 F 3 20SE1967 HOC 1967 0.00322 ) 0.01017 ) 1536 1380 E GS 2 4 24SE1967 9KY1967 0.00818 ) C.00504 » 1541 1554 E 2 GS 1 110C1967 30C1967 C. 00532 ) C. 01067 1 ( 1563 ( 157? GS11 KS?0 50C1967 6tirl967 0.00234 ) 0.0C770 ) 1569 1573 GS17 GS21 50C1967 6rri9A7 0.00149 1 0.00112 1 ( 1571 1547 GS19 CS 1 60C1S6 7 20C1967 0.00410 ) C.C3992 ) ( 1522 ( 1548 BH I CA 1 18SE1967 30C1967 0.00182 ) 0.05088 ) 1526 1552 MO SH 1 1 20SE1967 60C1967 0.01138 1 0.03962 ) 1529 1553 KM 1 SG 1 20SE1967 60C1967 0.01199 ) C.CC734 ) 1 1428 1 1350 MU 2 RH 2 29MY1967 19AP1967 0.02109 ) 0.11674 1 1417 1352 HO KM 2 2 22MY1967 21AP1967 0.01122 ) 0.24910 I 1418 1354 SH 2 GH 2 22MY1967 25AP1967 C. 07776 1 C.0C345 > ( 1429 ( 1406 ML 2 CB 2 29MY1967 13MY1967 0.19110 1 0.02696 ) 1407 SM 2 14MY1967 0.04180 ) ( 1349 CI 2 19AP1967 C. 00359 ) Fvagilavia oapuoina var. rnesotepta Rabh. Fvagilavia oapuoina var. mesolepta Rabenhorst, Fl. Europaea Alg., Sect. 1, p. 118. 1864. Valves constricted at the central area, either linear or slightly ex- panded between the central area and the ends. The central area is usually a hyaline fascia. Ends of the valves rostrate to subcapitate. Size range and ornamentation of the valve the same as in the nominate variety. The distribution and abundance of this entity in Lake Michigan is essen- tially the same as for the nominate variety. ?41 FRCAPUVM TCT NO OF STATIONS 176 CH 11MY1879 0.02796 ) 3507 CH 19FE1881 0. 04528 ) 146910 CH OC1945 C.0C218 ) (46921 J_46914 CH CH 23N01945 19AP1946 0.00453 ) 0.00214 ) 46908 46924 CH CH DE1945 10MY1946 C. 01007 ) 0.00282 ) (46917 (46923 CH CH 12JA1946 22N01946 AP1947 5JN1947 C. 00083 ) C.CC437 I (46920 (46916 (46907 CH CH CH 200E1946 4KY1947 JL1947 5JN1937 0.00092 1 0.00204 ) 469C9 465C6 CH CH MR1947 MY1947 0.02277 ) C. 00066 ) (46912 146919 CH CH C. 03449 1 0. 00759 ) 0.00444 ) 0.07489 1 46913 46771 CH EV 6AU1947 11JN1937 C. 01046 ) C.C0238 ) (46922 (46743 CH EV 21AU1947 20JN1937 C. 00097 ) C. 26548 1 (46745 EV FV 3JL1937 25JL1937 0.06270 ) 0.24553 I 46770 46747 EV EV 9JL1937 1AU1937 C. 31011 ) 0.69312 ) (46764 146760 EV EV 17JL1937 22SE1937 16MR1938 18MY1964 1.49879 ) C.CC985 ) (46748 (46756 { 1226 EV EV C 7 E 2 130C1937 27AP1938 16MY1964 16MY1964 0.10675 ) 0.0C672 ) 46749 46759 EV EV 12KR1938 19MY1938 0.02427 1 0.00338 ) (46768 ( 1224 EV B 4 0.01470 ) C.CC196 ) 0.01142 ) 0.01185 ) 1227 1232 C" 2 5 13MY1964 16HY1964 0.00439 ) 0.00348 ) ( 1228 ( 12 33 0 B 2 3 14MY1964 5JN2964 C.0C584 ) C. 00238 ) ( 1234 f 1237 B 3 C 2 18JN1964 8JN1964 0.0C562 1 0.00516 ) 0.01253 1 0.00598 ) C.0C279 ) 0.03540 ) 1439 1239_._. 1244 1441 B 0 F B 6 4 1 6 5JN1964 11JN1964 11JN1964 24JL1964 0. 00599 ) 0.00232 ) C. 00877 I 0.00220 ) ( 1236 ( 1241 ( 1245 ( 1249 C E F C 1 2 2 3 8JN1964 13JN1964 11JN1964 8JL1964 C. 12952 1 C.0C296 1 ( 1243 ( 1246 I 1252 E 6 F 3 C 1 13JN1964 11.IN1964 16JL1964 C. 01037 ) 0.03802 ) 1253 1259 C F 2 2 16JL1964 6JL1964 0.00228 I 0.01239 ) ( 12 54 ( 1260 0 F 2 3 15JL1964 6JL1564 C.0C192 ) 0.01719 ) ( 1262 _Li_26_a__ B 3 E 2 17AU1964 15AU1964 0.C0210 ! 0.00274 ) 1264 1270 C F 1 1 10AU1964 10AU1964 0.00579 ) 0.00272 ) ( 1265 ( 1279 C E 2 1 10AU1964 16SE1964 C.0C224 ) 0.00785 I ( 1283 L_L2S9_ ( 1292 E 5 16SE1964 0.00613 I 0.0044C ) 1284 1290 E C" 6 1 17SE1964 160C1964 C. 00635 ) 0.03411 ) ( 1288 I 1291 B C 3 2 150C1964 160C1964 C. 03701 ) 0.22993 ) D 1 E 2 150C1964 120C1964 0.02609 ) 0.09739 ) 1294 1300 0 E 3 3 150C1964 130C1964 0.00659 ) C. 02148 ) ( 1298 ( 13C1 E E 1 4 120C1964 130C1964 0.02154 ) C. 01325 ) ( 130 2 E 5 F 2 C 7 D 1 D 6 13EC1964 U0C1S64 0.02429 ) 0.00863 ) 1303 1306 E F 6 3 13CC1964 U0C1964 0.03918 ) 0.00277 ) ( 1304 ( 13C7 F B 1 6 110C1964 N01964 C.0C247 ) C.01082 I ( 1308 ( 1311 ( 1316 1 13?1 ( 1337 I 1343 ( 1376 6N01964 0.00912 ) 1309 C D 1 2 10NC1964 8N01964 0.01286 1 0.01862 ) ( 1310 ( 1313 C a 2 3 10N01564 9N01964 0. 01134 ) C.0C386 ) 9N01964 0.00756 ) 1318 1322 E E 2 6 7N01964 7N01964 0.00380 ) 0.01666 ) ( 1320 ( 1324 E F 4 2 7N01964 6N01964 0.00414 ) C.0C466 1 C 3 A 6 E 5 2MR1567 19AP1967 6MY1967 0.00147 ) 0.00069 ) 0.00562 1 0.00316 ) 1338 1370 C A 3 6 28MR1967 3MY1967 0.00397 ) 0.C0230 I ( 1341 ( 1375 A E 3 3 19AP1967 7MY1967 C. 00217 ) C.0C241 ) 1410 1447 A A 6 4 24CY1967 11JL1967 0. 00564 ) 0.00234 ) ( 1416 ( 1448 E A 5 6 28HY1967 10JL1967 C.CC219 ) C. 02122 ) ( 1449 C 3 16JL1967 15JL1967 0.01146 ) 0.01400 ) 1451 1511 C E 7 2 16JL1967 1SE1967 0.03543 ) C. 00614 ) ( 1452 ( 1532 E A 2 3 14JL1967 165E1967 C. 01277 ) C. 00657 ) ( 1533 .. ( 1536 ( 1378 A 4 F 2 GS 2 19SE1967 24SE1967 9MY1967 10MY1967 0.00928 I 0.01091 ) 1534 1538 A E 6 5 19SE1967 23S61967 0. 01861 ) C. 00552 ) ( 1535 ( 1541 c E 7 2 20SE1967 110C1967 C.0C644 ) C. 02661 ) 0.00841 I 0.00477 1 1379 ( 1382 GS GS 3 6 9NY1967 10KY1967 0.05261 ) 0.00555 1 ( 1380 ( 1383 c-s GS 4 7 9MY1967 10MY1967 C. 00841 ) C. 01069 ) ( 1384 GS 8 10MY1967 17MY1967 0.00185 ) 0.01584 } 1385 ( 1388 GS 9 GS12 10MY1967 12KY1967 0.00471 1 0.04223 I 1 1386 1 1389 GS1C GS13 12HY1967 12MY1967 C. 01149 ) 0.32746 ) ( 1390 GS14 12MY1967 13MY1967 0.20552 1 0.17532 ) 1391 ( 1394 GS15 GS18 12MY1967 13HY1967 0.06704 ) 0.12041 ) ( 1392 ( 1395 GS16 GS19 12HY1967 13HY1967 C. 02157 ) C. 25836 1 ( 1396 GS20 13MY1967 3001967 0.12652 ) 0.00521 ) ( 1397 ( 1564 GS.21 GS12 13MY1967 50C1967 0.04578 1 0.00329 ) ( 1398 ( 1567 CS22 GS15 14MY1967 50C1967 C. 02125 ) C. 00318 ) ( 1568 GS16 50C1967 0.00577 ) ( 1569 GS17 50C1967 C. 00743 1 ( 1570 CS18 50C1967 0.02975 ) 76 Ann 967 0.3(1489 1 1572 " GSPO 6fir.l96 7 1.1356? 1 1573 (IS 21 60C1567 C. 10527 1 ( 1574 1 1547 GS22 HS 1 60C1967 20C1567 0.00575 ) 0.01597 ) 1575 1524 GS28 HI 1 6CC1967 20SE1967 0.12128 ) C. 02189 ) 1544 1546 HU 1 LU 1 20C1967 2CC1967 C. 02621 ) C.0350L ! ( 1526 1 1545 HO 1 yi l 20SE1967 ?nr.i<;67 0.01707 ) 0.04730 ) 1530 1548 FR 1 CA 1 24SE1967 3CC1967 0.04000 1 0.01272 1 1531 1549 GH 1 CO 1 25SE1967 40C1967 C. 02536 1 C.JJ9JLL.1- 1 1551 ES 1 50C1967 29HY1967 0.03195 ) 0.27297 ) 1550 1426 HR 1 HS 2 50C1967 29HY196 7 0.09912 ) 0.16798 ) 1553 1427 SG 1 LU 2 60C1S67 2SHY1967 C. 02203 ) C. 06053 ) 1 1417 HO 2 Mfl 7 22HY1S67 6HY1967 0.07851 ) 0.01176 I 1418 1353 SH 2 FR 2 22HY1967 23AP1967 0.17107 I 0.02110 ) 1350 1354 6H 2 GH 2 19AP1967 25AP1967 C. 08590 ) C. 05523 ) C 1429 _I_JL4fi6. ML 2 GB 2 29HY1967 13HY1967 0.55208 ) 0.11592 ) 14C4 1423 MC 2 WA 2 10HY1967 25HY1967 0.07622 1 0.00428 I 1405 ES 2 12HY1967 C. 13545 ) Fragilaria oonstruens (Ehr.) Grun. Staurosira oonstruens Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:424. 1843. Fragilaria oonstruens (Ehr.) Grunow, Verh. Zool. Bot. Ges. Wien, 12:371. 1862. Cells in girdle view rectangular, joined by the valve faces into long, closely appressed, band-shaped colonies. Specimens from Lake Michigan 5--25u long, 4-12u broad. Valves short, lanceolate with strongly inflated central portion and protracted, subcapitate to capitate ends. In girdle view of the colony the sharp expansion of the valve appears as a line, or a double line, depending on the level of focus, running the length of the colony. Striae slightly radiate throughout the length of the valve, in the more robust specimens finely lineate, 14-18 in lOp. Pseudoraphe variable in shape, in some specimens very narrowly lanceolate and sharply bordered, in others more broadly lanceolate and indistinctly bordered. No specially differentiated central area is present. Specimens of this taxon from Lake Michigan are highly variable, both in the shape of the valve and in the structure of the striae. Many popula- tions approach closely the form of the smaller size range of F. inflata (Heid.) Hust. but specimens of larger size, clearly referrable to that taxon, have never been found in our collections. Further research may show that the specimens treated under this epithet actually represent a complex of similar forms, but such distinctions cannot be made in our material. Large populations are rare in Lake Michigan and the forms present grade into one another so subtly that no distinctions can be made. Published reports indi- cate that this entity reaches its greatest abundance in eutrophic lakes. Most of our reports come from inshore areas that are appreciably eutrophied. 242 FRCONSTR TCT NC OF STATIONS 48 160973 CH 1876 0.04724 ) 3541 CH 1FE1881 C. 00978 ) 46923 CH 22NC1946 C. 00219 I (46920 (46763 CH EV 20DE1946 23AU1937 0.00185 ) 0.02029 1 46922 46756 CH EV 21AU1947 27AP1938 0.00194 ) 0. 00168 ) 46758 1236 EV C« 1 5JN1937 8JN1964 C. 00357 ) C.CC175 ) ( 1243 ( 1279 E 6 E 1 13JN1964 16SE1964 0.00209 ) 0.00785 I 1264 1287 C< 1 F 3 10AU1964 15SE1964 0.00193 ) 0.00500 I 1272 1293 C" 1 0 2 10SE1964 150C1964 C.CC821 ) 0.0C472 1 ( 1341 ( 1388 A 3 GS"12 19AP1967 12HY1967 0.00325 ) 0.00603 ) 14C8 1396 A 3 GS20 23HY1967 13HY1967 0.00447 1 C. 01036 1 1536 1397 E 2 C-S21 24SE1967 13HY1967 C.0C273 ) C.CC065 I ( 1555 I 1572 GS 2 GS20 30C1967 60C1967 0.00706 ) 0.01532 I 1569 1573 GS17 GS21 50C1967 60C1967 0.00149 I 0. 00336 1 1571 1574 C-S19 GS22 60C1967 60C1967 0.00117 ) C. 01726 ) ( 1575 i 1521 GS28 SH 1 6CC1967 18SE1967 0.00387 ) 0.0C577 ) 1544 1522 HU 1 BH 1 2CC1S67 18SE1967 0.00715 ) 0.00547 ) 1546 1527 LU 1 TR 1 20C1967 20SE1967 C. 03001 I C.C3145 1 ( 1529 ( 1552 KM 1 SH 1 20SE1967 6CC1967 0.02398 ) 0.02641 ) 1530 1550 FR 1 HR 1 24SE1967 50C1967 C. 01000 ) 1.58592 ) 1545 1553 hL 1 SG 1 20C1967 6CC1967 C.1C812 1 C. 00734 I ( 1428 I J350 MU 2 8H 2 29HY1967 19AP1967 0.00301 ) 0.16519 ) 1426 1402 HS 2 TR 2 29HY1967 6HY1967 0.05249 ) 0.00541 1 1417 13 54 F0 2 GH 2 22HY1967 25AP1967 C. 01122 ) C.0C690 ) C 1404 HO 2 10HY1967 0.02541 ) 1407 SM 2 14HY1967 C. 02986 ) 1349 CI 2 19AP1967 C. 00359 I Fragilaria oonstruens var. binodis (Ehr.) Grun. Fragilaria ? binodis Ehrenberg, Mikrogeol., pi. 5(2), fig. 26; pi. 6(1), fig. 43; pi. 11, fig. 15. 1854. Fragilaria oonstruens var. binodis (Ehr.) Grunow, Verh. Zool. -Bot. Ges. Wien, 12:371. 1862. 77 Valves biundulate with constricted midportions and protracted, rostrate to subcapitate ends. Size range and ornamentation of the valve surface the same as in the nominate variety. Valves often more or less asymmetric, strongly constricted on one side and somewhat less constricted to nearly parallel on the other. Published reports indicate that this entity has. about the same distri- bution range as the nominate variety. Asymmetric forms appear to be most common in highly eutrophied habitats. 2*3 FRCONSVB TOT HC OF STATIONS 65 ( 3541 1 1?A4 CH r« 1 1FE18B1 104111964 0.01956 1 0.60772 ) 46747 1270 EV F 1 1AU1937 10AU1964 0.00248 ) C. 00272 1 1245 1279 F 2 E 1 11JN1964 16SE1964 C.CC346 ) C.C1178 ) ( 1285 I 1306 F 1 F 3 15SE1964 110C1964 0.00582 ) 0.00554 ) 1304 L324 F 1 F 2 110C1964 6N01964 0.00247 ) 0.00233 ) 1305 1338 F 2 C 3 HOC 1964 28MR1967 C.0C345 ) 0.00132 ) 1 1341 1 153A A 3 F 2 19AP1967 24SF1967 0.00542 ) 0.00818 1 1342 1541 A 4 E 2 19AP1967 110C1967 0. 00361 ) 0. 00532 I 1532 1387 A 3 GSll 18SE1967 12MY1967 C.0C657 ) C.0C396 1 ( 1388 1 139? GS12 GSlf. 12MY1567 1PMY1967 0.00603 ) 0.01541 ) 1389 L_12S4_ GS13 GS18 12MY1967 13MY1967 C.C0258 I 0.00344 ) 1391 1395 GS15 CS19 12MY1967 13MY1967 C.0C479 ) C.CC117 ) ( 1396 1 IUI CS20 G<; 9 13MY1967 4fir.l<:6 7 0.00592 ) 0.00587 1 1554 1565 GS 1 GS13 30C1967 5001967 0.00356 ) C. 03042 ) 1558 1566 CS 5 GS14 40C1967 50C1967 C. 05946 ) C. 00183 ) { 1567 1 1571 GS15 cut 50C1967 6nr.i967 0.01429 ) 0.00734 1 1568 1572 GS16 GS20 50C1967 60C1967 0.01299 1 C. 03064 ) 1569 1574 C-S17 GS22 50C1967 60C1967 C. 01189 ) C. 04315 ) ( 1575 1 15?n GS28 H(l 1 60C1967 18SF1967 0.02193 ) 0.09901 1 1544 1521 MU 1 SH 1 20C1967 18SE1967 0.06434 ) 0.04616 ) 1546 1522 LU 1 8H 1 20C1967 18SE1967 C. 03001 ) C. 00365 ) ( 1526 1 15P9 MO 1 KU 1 20SE1967 20SE1967 0.14792 ) 0.17988 1 1527 1530 TR 1 FR 1 20SE1967 24SE1967 6.13836 ) 0.08001 ) 1528 1531 SB 1 GH 1 20SE1967 25SE1967 C. 02888 ) C.05072 1 1 1545 I 15511 WL 1 MR 1 20C1967 5nC1967 20.43381 ) 0.35931 1 1549 1553 MO 1 SG 1 40C196 7 60C1967 0.01370 1 0.02203 I 1552 1428 SM 1 CU 2 60C1967 29MY1967 C. 01321 ) ' 0.00904 ) ( 1426 1 141ft MS 2 SH 7 29MY1967 22MY1967 0.02100 ) 0.07776 ) 1427 1350 LU 2 BH 2 29MY1967 19AP1967 0.02421 ) 0.11674 ) 1417 1401 HO 2 CO 2 22MY1967 6MY1967 C. 06729 ) 0.01764 ) « 1353 ( 1407 FR 2 SM 2 23AP1967 14MY1967 0.01055 1 0.00597 ) 1354 1406 GH 2 GS 2 25AP1967 13KY1967 C. 01036 t 0.00539 I 1404 *Q 2 10HY1967 C. 02541 ) Fragitari,a aonstruens var. capitata HSrib. Fragilaria aonstruens var. capitata Heribaud, Diat. Auvergne, p. 144, pi. 1, fig. 2. 1893. Valves linear-lanceolate with protracted, capitate ends, occasionally slightly constricted near the middle of the valve. Specimens from Lake Michigan 12-30u long, 4-7u broad, striae 14-16 in lOu. Ornamentation of the valve surface the same as in the nominate variety. 244 FRC0NSVC TOT NO OF STATIONS 12 ( 3541 CH 1FE1881 0.01956 ) 1 1274 0 1 17SE1964 0.00469 I ( 1279 E 1 16SE1964 C. 02356 ) 1 1382 GS 6 10MY1967 0.00278 ) 1 1554 GS 1 30C1967 0.00712 1 ( 1352 ( 1559 GS16 GS 7 12KY1567 40C196 7 C. 00925 ) 0.00350 ) ( 1396 ( 1571 GS2C GS19 13MY1S6T 60C1967 C.0C074 ) C.C0059 ) 19AP1967 0.0C220 ) 25AP1967 0.00173 I 10KY1967 C. 01270 1 Fragilaria aonstruens var. minuta Temp, and Per. Fragilaria aonstruens var. minuta Tempere and Peragallo, Diat. Monde Entier, ed. I, no. 89. 1889. Very small form, only 4-10u long and 2-3u broad. Valves elliptical- lanceolate in shape and striae finer than in the nominate variety, 16-20 in lOu. Although uncommon in modern collections, this entity is abundant in some subfossil material from the upper Great Lakes region. It is the same entity that we (Stoermer and Yang 1968) reported as an undetermined species abundant in Lake Huron sediments. Andrews. (1966) reported entities under the name F. aonstruens var. venter in the same size range. While it is conceivable that the range of variation in the above entity may include our specimens, it appears to us that the consistently narrower valves and the finer striae are sufficiently distinctive characteristics to separate the two taxa. 78 _2fcZ FRSPFr.flR TCT NC CF STATIONS 14_ (46910 CH DC1945 0.00109 ) (46915 20FE1946 C. 00569 ) (4675B -1Ju6I&2_ ( 1270 __L_1A4JL EV „EY_ 5JN1937 18HR1938 0.00713 ) 0.02206 ) (46763 ( 1260 EV F 3 23AU1937 6JL1964 0.04058 ) COO 191 ) (46768 ( 1268 EV E 2 F 1 -*-_3_ 10AU1964 19AP1967 0.00272 ) 0.00217 ) ( 1285 ( 1346 F 1 C 7 15SE1964 21AP1967 0.01165 0.00267 ( 1305 ( Fragilaria oonstruens var. pumila Grun. Fragilaria oonstruens var. Tpurrrila Grunow in: Belgique, pi. 45, fig. 21a. 1881. 16KR1938 15AU1964 Van Heurck, Syn. Diat. C. 01470 ) C.CC274 ) 110C1964 C. 00173 ) Valves elliptic-lanceolate to lanceolate with somewhat protracted, rostrate apices. Size range and oranmentation of the valve surface the same as in the nominate variety. 245 FRC0NSVP ICT NO OF STATIONS ( 3541 (46750 CH EV 1FE1881 24SE1937 0.04891 1 0.00471 ) 46747 1264 EV C 1 1AU1937 1CAU1964 0.00248 ) 0.00193 ) 46763 13C4 EV F 1 23AU1937 110C1964 C.C2029 ) 0.00494 ) ( 1341 ( 1537 A 3 E 3 19AP1967 24SE1967 0.00108 ) 0.00431 ) 1533 1574 A 4 GS22 19SE1967 60C1967 0.00464 ) 0.00288 ) 15 36 1544 E 2 CU 1 24SE1961 20C1967 C.CC273 ) C.0C715 ) ( 1520 ( 1529 HO I KW 1 18SE1967 20SE1967 0.00471 » 0.01199 ) 1522 1531 BH 1 GH 1 18SE1967 25SE1967 C. 00365 ) 0.01691 ) 1527 1545 TR 1 hL 1 2CSE1967 20C1967 C. 01258 ) C. 05406 I ( 1550 < 1417 MR 1 HO 2 50C1967 22MY1967 0.02478 1 0.00374 1 1553 1350 SG 1 BH 2 60C1967 19AP1967 0.00734 ) 0.04185 ) 1428 1354 *U 2 GH 2 29KY1967 25AP1967 C.CC904 1 C. 00345 I Fragilaria construens var. subsalina Hust. Fragilaria oonstruens var. subsalina Hustedt, Mitt, geogr. Ges., Naturhist. Mus. LUbeck, 2 Reihe, 30:106, fig. 5-8. 1925. Valves linear with parallel sides and cuneate, in the larger specimens somewhat protracted, ends. Size range and ornamentation of the valve surface as in the nominate variety. 247 FRC0NSVA TCT NO OF STATIONS 9 (60973 CH 1876 0.02362 ) ( 1?79 F 1 16SF1964 0.00785 > (46758 ( 1341 EV A 3 5JM937 19AP1967 C. 01070 I 0.00108 ) (46762 ( 1569 EV GS17 18MR1938 50C1967 C. 02206 I C.0C149 ) ( 1550 MR 1 50C1967 0.01239 ) ( 1350 BH 2 19AP1967 0.00220 ) ( 1404 CO 2 10MV1967 C. 02541 ) Fragilaria oonstruens var. venter (Ehr.; Grun. Fragilaria venter Ehrenberg, Mikrogeol., pi. 14, fig. 50. 1854. Fragilaria oonstruens var. venter (Ehr.) Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 45, figs. 21b, 22, 23, 24b, 26a-b. 1881. Valves rhombic-elliptical to elliptical with somewhat protracted, ros- trate ends. Maximum length of specimens from Lake Michigan does not exceed lOu. Ornamentation of the valve surface essentially similar to that of the nominate variety. 246 FRCONSVV TCT NO ■OF STATIONS (46915 (46905 CH CH ( 156.6 1 1574 GS14 20FE1946 JA1947 0.00569 ) 0.00123 ) (46923 (46916 CH CH 22N01946 4MY1947 0.00219 ) C. 00068 I (46920 146919 CH CH CH 20OE1946 5JN1947 C.0C083 ) C.CC031 ) _C.0C303 ) (46907 (46771 CH EV JL1947 11JN1937 0.00049 ) 0.OC238 ) (46922 (46743 CH EV 21AU1947 20JN1937 C. 00388 ) C. 00428 I (46758 (46764 EV EV 5JN1937 17JL1937 C. 01426 ) C.C4835 ) (4674T XA6.T48 EV EV 1AU1937 130C1S37 0.01238 I 0.04270 ) (46752 (46767 EV EV 15SE1937 270C1937 C. 02177 1 0.01547 1 (46750 (46768 EV EV 24SE1937 16MR193S C.0C943 ) C.C8820 ) (46762 ( 1284 EV E 6 E 6 E 2 18MR1938 17SE1964 130C1964 7MY1967 0.02206 ) 0.00318 ) 0.01119 ) 0.00598 1 ( 1274 ( 1291 ( 1322 ( 1452 C 1 C 2 17SE1964 16CC1964. 0. 00469 I C. 00245 1 ( 1279 ( 1297 E 1 0 6 16SE1964 140C1964 C.0C785 ) C.CC381 ) ( 1303 ( 1374 E 6 E 2 7N01964 14JL1967 0.00333 1 0.00213 ) ( 1340 ( 1537 C 7 E 3 28MR1967 24SE1967 C. 00145 ) C.0C431 ) ( 1538 ( 1387 E 5 r.sn GS20 GS 7 23SE1967 12HY1967 13HY1S67 40C1967 0.07181 ) 0.00396 J 0.00148 } 0.00350 1 ( 1541 ( 1392 E 2 GS16 11GC1967 12MY1967 0.00532 t 0. 00308 ) ( 1383 ( 1394 GS 7 GS18 10MY1967 13MY1967 C. 00535 ) C.0C344 ) ( 1396 1 1559 ( 1398 ( 1561 GS22 GS 9 14CY1967 40C1967 0.00607 I 0.00587 ) ( 1557 ( 1563 GS 4 GS11 30C1967 50C1967 C.0C374 ) C.0C234 ) 50C1967 6nC19A7 0.00183 ) 0.31065 1 ( 1567 GS15 ( 1575 GS28 50C1967 60C1967 C. 00476 ) C. 00129 ) ( 1572 1 1544 GS20 KU 1 6GC1967 20C1967 C.CC1B0 ) C- 01668 I 79 ( 1521 ( 1577 SH 1 IR 1 18SE1967 7CSF1967 0.01154 1 0.13836 1 1523 1528 RA 1 SB 1 1SSE1967 20SE1967 0.01845 ) 0.07219 ! 1526 1529 CO 1 KM 1 20SE1967 C. 15930 ) ( 1545 ( 1553 UL 1 SG 1 20C1967 60C1967 0.04730 1 0.03672 1 1552 _ 1417 SM 1 HO 2 60C1967 22MY1967 0.15847 ) 0.00374 ) 1550 1350 CR 1 50C1967 C.Ce673 ) C. 03744 ) C. 04873 ) ( 1399 ( 135? PW 2 KU ? 5MY1967 21AP1967 0.01360 ) 0.04295 1 1401 1404 MC 2 MO 2 6MY1967 10MY1967 0.03528 ) 0.02541 I 1402 1405 TR 2 ES 2 6KY1967 ( 1407 SN 2 14MY1967 0.37619 ) 1349 CI 2 19AP1967 0.00359 ) Fragilavia orotonensis. Kitton Fragilavia crotonensis Kitton, Sci. Gossip, 5:110, fig. 81. 1869. Cells in girdle view lanceolate, with blunt ends and expanded central portions. Cells joined by valve faces of the expanded central portion into long, ribbon-shaped colonies. Specimens from Lake Michigan 40-112y long and 2-4u broad at the widest part of the valve. Valves very elongate, spindle- shaped, with expanded central portion, tapering gradually to near the apices which are bluntly rounded to subcapitate. Pseudoraphe very narrow, linear. In most specimens a central area is present in the form of a broad trans- verse fascia. In some specimens this area is indistinctly bordered by par- tially developed striae and in some specimens, particularly in the smaller size range, the central area is entirely lacking. The striae are indis- tinct and sometimes irregular 12-16 in lOu. 248 FRCRCTCN TCT NO OF STATIONS 320 (60973 ( 3507 CH ch 1876 19FE1881 44.63863 ) 10.98030 I ( 3540 146910 CH CH 11CY1879 0C1945 12.27228 1 12.38913 ) 1 3541 (46921 CH CH IFE1881 23N01945 t. 72992 ) 23.28799 ) (469C8 (46914 CH CH 0E1945 19AP1946 12.10473 ) 11.97185 1 (46917 146924 CH CH 12JA1946 10HY1946 11.73145 ) 10.38574 > (46915 (46923 CH CH 20FE1946 22N01946 17.38461 ) 34.66364 ) (46920 (46912 CH CH 20CE1946 AP1947 71.07423 ) 36.24237 ) (469C5 (46916 CH CH JA1947 4HY1947 42.78098 1 16.25369 ) I469C9 (46906 CH CH MR1947 MY1947 6.43313 ) 14.32250 ) (46919 (469?? CH CH 5JN1547 21AU1947 16.66893 I 35.53409 1 (469C7 (46758 CH EV JL1947 5JN1937 30.03308 1 9.28607 ) (46913 (46771 (46770 (46747 Ch EV EV EV 6AU1947 11JN1937 9JL1937 1AU1937 76.14265 ) (46743 (46764 EV FV 20JN1937 17JU937 20.98141 ) 29.55681 ) (46745 (46757 EV EV 3JL1937 25JL1937 28.67293 ) 43.94588 ) 2e. 36739 ) 55.24171 ) (46763 (46752 EV EV 23AU1937 15SE1937 32.38635 I 40.83586 ) (46765 (46760 EV EV 30AU1937 22SE1937 29.82710 ) 49.21954 ) (46769 (46750 EV EV 7SE1937 24SE1937 55.92705 ) 42.75816 ) (46744 (46749 EV EV 6CC1937 12MR1938 56.67186 ) 36.70348 ) (46748 (46768 tv EV 130C1937 16MR1938 2.8608C ) 9.87799 ) 146767 (46762 EV EV 270C1937 18MR1938 66.45383 1 50. 63960 ) (46751 (46759 EV EV 30MR1938 19MY1938 13.44350 1 5.19919 ) (46772 (46761 EV EV 18AP1938 27MY1938 12.12207 I 32.58475 ) (46756 146766 EV EV 27AP1938 140E1938 7.8C429 ) 33.26996 ) ( 1223 ( 1226 B C 3 7 18HY1964 16MY1964 2.51582 1 10.12177 ) ( 1224 ( 1227 B C 4 2 18CY1964 13HY1964 1.64690 ) 6.83189 I ( 1225 ( 1228 C D 6 2 15HY1964 14HY1964 16MY1964 18JM964 7.13446 ) 3.4C606 ) 1 1229 ( 173? 0 f 5 5 14MY1964 16MY1964 11.98960 ) 8.88727 ) ( 1230 ( 1233 E B 2 3 16HY1964 5JN2964 6.84546 ) 16.33682 ) ( 1231 ( 1234 E B 3 3 2.39703 ) 29.91452 ) ( 1235 ( 1737 C C1 7 2 16JN1964 ' 8JN1964 22.93330 ) 15.33900 1 1 1439 1 1238 B D 6 3 5JN1964 11JN1964 14.31369 ) 3.22000 1 1 1236 1 1239 C 0 1 4 8JN1964 11JM964 11.76223 1 6.C9225 1 ( 1240 ( 1243 D E 6 6 10JN1964 13JN1964 8.16063 ) 8.91589 ) 1 1241 1 1244 E F 2 1 13JN1964 11JN1964 8.27986 I 27.78416 ) 1 1242 I 1245 E F 3 2 13JN1964 11JN1964 C. 4 1963 ) 14.52182 I ( 1246 ..JL14AQ F B C c 3 6 6 2 11JN1964 11JL1964 10JL1964 16JL1964 14.22339 ) _J_5.78656 ) 1 1247 ( 1441 B B 6 14JL1964 24JL1964 24.50163 ) 12.58838 ) 1 1248 1 1249 B C C" c 3 3 1 5 24JL1964 8JL1964 16JL1964 15JL1964 27.03554 1 14.62878 ) ( 1250 ( 1753 12.26310 1 16.82947 1 1 1251 ( 1254 C D 7 2 16JH964 15JL1964 11.82282 1 1C. 24899 1 1 1252 1 1255 16.55508 ) 5.45793 ) ( 1256 ( 1259 E F 2 2 14JL1964 6JL1964 5.4316C ) 29.48996 ) I 1257 1 1260 E F 3 3 14JL1964 6JL1964 2.17729 ) 25.25545 ) 1 1258 1 1261 F B 1 3 6JL1964 2AU1964 37.62181 ) 42.31100 ) ( 1262 ( 1263 B . __£ 3 7 17AU1964 15AU1964 62.32675 ) 54.92393 1 ( 1442 I L2_64__ B C____ 6 J. 2AU1964 10AU1964 26.62914 ) 20.67886 I 1 1443 1 1265 B C 6 2 16AU1964 10AU1964 57.23322 I 40.21638 ) ( 1266 1 1769 D F 3 3 18AU1964 15AI11964 27.99214 1 23.21437 ) 1 1267 1 1270 c F 6 1 18AU1964 10AU1964 32.38219 I 39.45540 1 1 1268 1 1271 E C 2 7 15AU1964 22SE1964 22.76696 ) 6.95306 I ( 1272 ( 1775 c El 1 7 10SE1964 17.9F1964 34.91359 ) ._3_8_.5J_0_Z___1 ( 1273 ( 1276 C 0 2 3. _ 10SE1964 . .J_8.JiF._L.L64 39.57201 1 26.59811 1 1 1274 ( 1277 D 0 1 4 17SE1964 18SE1964 35.86073 1 J22. 12169 > ( 1278 1 17R1 D E. E F 6 J 6 3 18SE1964 16SF1964 17SE1564 15SF1964 11.13801 ) _29.JL74.aaj_. _ ( 1279 ( 1282 E E 1 4 16SE1964 16SE1964 31.88832 ) 36.45428 ) 1 1280 1 1283 E E 2 5 16SE1964 16SE1964 5.93941 1 22.90669 ) ( 1284 ( 17R7 42.81447 1 43.78502 ) 1 1285 ( 1288 F B 1 3 15SE1964 150C1964 38.32623 ) 57.29460 ) 1 1286 1 1445 F B 2 6 15SE1964 140C1964 42.1409e ) 18.94977 1 ( 1289 ( 179? C 0 F E F 7 4 1 4 1 140C1964 15QC_L_9_______ 150C1964 120C1_S_64. 130C1964 nnr.1964 10.46568 ) 38.08884 X 24.14079 ) 34.11783 ) 39.25638 ) 75.20003 1 ( 1290 ( 1293 1 1296 _ LI 299 C* D 1 2 16CC1964 150C1964 49.34621 I 21.79039 ) 1 1291 ( 1294 C 0 2 3 16CC1964 150C1964 39.C3918 ) 26.38116 ) ( 1295 ( l?9fl 0 E 5 2 140C1964 120C1964 14.32112 ) 35.40685 I ( 1297 ( 1300 D E 6 3 140C1964 130C1964 10.12909 ) 32.57561 1 ( 1301 I 1304 ( 1302 ( 1305 E F 5 2 13CC1964 110C1964 41.66328 ) 7?. 33960 ) 1 1303 ( 1306 E F 6 3 130C1964 110C1964 17.63124 ) 76.05742 I < 1307 ( 1310 B C 6 7 N01964 10N01964 36.87399 ) _5.0J,_16J_iL 1 ( 1308 ( 1311 C D 7 1 6N01964 8N01964 16.39343 ) 48.03673 ) ( 1309 ( 1312 C 0 1 2 10N01964 8N01964 58.64C98 1 45.41362 ) ( 1313 1 131A D n 3 6 9N01964 9NQ1964 34.59459 ) 39.13568 ) ( 1314 ( 1317 0 E 4 1 9N01964 6H01964 3S. 78984 ) 48.24997 ) ( 1315 ( 1318 0 E 5 2 9NC1964 7NC1964 27.07005 ) 44.21361 ) ( 1319 1 137? E F 3 7N01964 7N01964 47.83598 1 51.78790 ) ( 1320 ( 1323 E F 4 1 7N01964 6N01964 46.18407 ) 67.80487 1 ( 1321 ( 13 24 E F 5 2 7N01964 6N01964 48.45007 1 -5.E7CC7 ) ( 1325 I 1338 F C A r. 3 3 3 5 6N01964 28MR1967 19AP1967 25AP1967 48.13722 1 2.71593 ) 1 1336 1 1339 C C 3 5 27JA1967 28MR1967 6.46987 ) 2.20739 ) I 1337 1 1340 C C 3 7 2MR1967 28MR1967 3.36866 ) 2.91087 ) ( 1341 ( 1345 2.74129 ) 2.74838 ) ( 1342 1 1346 A C 4 7 19AP1967 21AP1967 3.81499 ) 2.61707 ) 1 1344 ( 1347 C E 3 2 25AP1967 23AP1967 1.50550 I 1.62914 ) ( 1348 E 5 23AP1967 1.75188 ) ( 1368 A 3 4MY1967 4.21929 ) ( 1369 A 4 4MY1967 C. 33919 1 80 C 137(1 A 6 3MY1967 6.41J71 1 1371 C 3 4KY1967 C. 54019 1 1 1372 C 5 5MY1967 C. 36175 1 ( 1373 1 1376 C E 7 5 5MY1967 6MY1967 0.47921 ) 3.98302 ) 1374 1408 E A 2 3 7MY1967 23MY1967 2.30126 1 4.69526 ) 1 1375 ( 1409 E A 3 4 7MY1967 23MY1967 1.88647 ) 2.1C677 ) ( mo ( 1*13 A C 6 7 24MY1967 , 25MY1967 6.39377 1 2.23331 1 1411 1414 C E 3 2 31MY1967 28MY1967 2.87203 ) 2.38791 1 ( 1412 ( 1415 C E 5 3 31MY1967 28MY1967 1.94882 1 C. 44970 1 1 1416 1 1433 E c 5 3 28MY1967 17.1N1967 2.77942 ) 4.97352 1 1431 1434 A C 3 5 12JN1967 17JN1967 3.82110 ) 2.53619 ) ( 1432 ( 1435 A C 4 7 13JM967 13JM967 4.49831 1 7.52692 ) 1 1436 1 1446 E A 2 3 15JN1967 11JL1967 1.88522 ) 2.39714 I 1437 1447 E A 3 4 15JN1967 11JL1967 0.45218 ) 12.77133 ) ( 1438 < 1448 E A 5 6 14JM967___3-M428~+ — 10J11967 5.44651 1 I 1449 ( 1452 C E A C t A 3 2 3 3 2 3 16JL1967 14JU967 28AU1967 2SE1967 1SE1967 18SE1967 5.08235 ) 8.79210 1 1450 1453 C E 5 3 16JL1967 15JL1967 8.93078 1 C.5763C ) ( 1451 ( 1454 C E 7 5 16JL1967 15JL1967 10.60982 ) 15.56319 ) I 1504 i i 5ns 32.14417 ) 20.14227 1 12.03303 ) 44.38092 1 1505 15fa 1512 1533 A C E A 4 3 4 28AU1967 2SE1S67 32.46417 1 29.32269 ) ( 1506 ( 1510 A C 6 7 29AU1967 29AU1567 2C. 50529 1 26.11444 I ( 1511 ( 1532 1SE1967 19SE1967 24.18721. ) 44.84262 I ( 1513 ( 1534 E A 5 6 31AU1967 19SE1967 51.43407 ) 43.86807 1 ( 1535 i 1538 C E 7 5 20SE1967 23SE1967 16.44832 ) 27.06732 1 1536 ( 1539 E C 2 3 24SE1967 40C1967 19.27795 I 42.26627 ) ( 1537 ( 1540 E C 3 5 24SE1967 40C1967 16.90675 1 38.21909 1 ( 1541 ( 1377 E GS 2 1 110C1967 9KY1967 37.99690 ) 0.47101 ) 1542 1378 E GS 3 2 11CC1967 9MY1967 24.20667 ) 3.53223 ) < 1543 ( 1379 E GS 5 3 10CC1967 9HY1967 28.15686 ) 5.96534 1 < 1360 _ LJ383 GS GS 4 7 9MY1967 10MY1967 9.41651 ) 5.05239 ) 1381 1384 GS GS e 8 10CY1967 10MY1967 5.6 7667 ) 2.19983 ) ( 1382 ( 1385 C-S GS 6 9 10KY1967 10MY1967 2.91432 ) 3.23044 ) I 1386 [ 1389 GS10 GS13 12MY1967 12MY1967 1.70928 ) 13.53686 ) ( 1387 1390 GS11 GS14 12^Y1967 12NY1967 7.20849 ) 7.39871 ) { 1388 ( 1391 C-S 12 CS15 12MY1967 12MY1967 13MY1967 13MY1967 4.22323 ) 8.04482 ) ( 1392 ( 1395 GS16 GS19 12MY1967 13MY1967 5.17767 ) 2.38392 ) ( 1393 ( 1396 GS17 GS20 13NY1967 13MY1967 10.35503 I C. 88047 ) < 1394 ( 1397 GS18 GS21 8.79004 ) C. 77832 ) ( 1398 C 1556 GS22 GS 3 14HY1967 30C1967 8.07602 1 23.36131 1 ( 1554 1557 GS GS GS GS 1 4 30C1967 30C1967 3C. 38496 ) 54.93272 ) ( 1555 1 1558 GS GS 2 5 30C1967 40C1967 37.C7626 ) 51.88678 ) < 1559' __ < 1562 GS 7 GS10 40C1967 50C1967 54.34706 ) 30.22154 ) 1560 1563 8 11 40C1967 50C1967 32.73036 1 46.32184 1 ( 1561 ( 1564 GS 9 C-S12 40C1967 50C1967 26.7C657 ) 73.16148 ) ( 1565 1 1568 GS13 GS16 50C1967 50C1967 60.69363 ) 31.00964 ) 1566 1569 GS14 GS17 50C1967 50C1967 49.44046 | 56.50111 I 1 1567 1 1570 C-S 15 GS18 5CC1S67 50C1967 3C. 11876 ) 48.59183 1 1 1571 . _.L_157_4 GS19 GS22 60C1967 6GC1967 8.85106 ) 31.81268 ) 1572 1575 GS20 GS28 60C1967 6CC1967 6.68758 | 13.72761 ) ( 1573 ( 1544 GS21 MU 1 6CC1967 20C1967 14.26764 1 C.4C031 1 ( 1547 (_L5_2CL MS HO 1 .1 1 1 20C1967 18SE1967 19SE1967 20SE1967 23.12175 ) 18.85991 ) 1524 1521 MI SH 1 20SE1967 18SE1967 15.76182 ) 18.46295 ) ( 1546 ( 1522 EH 1 1 20C1967 18SE1967 3.44120 1 0.00912 ) ( 1523 1 1527 RA TR 41.32840 ) 5.23270 ) 1525 1528 Ph SB 1 1 20SE1967 20SE1967 25.62317 ) 26.10452 ) t 1526 ( 1529 KO KM 1 1 2CSE1967 20SE1967 15.47477 1 17.65199 1 ( 1530 ( 1548 FR CA 1 1 24SE1967 30C1967 18.88188 ) 68.59178 ) 1531 1549 GK MC 1 1 25SE1967 46C1967 0.48183 ) 14.03316 1 ( 1545 { 1551 WL ES 1 1 20C1967 50C1967 3.13535 1 38.21391 ) 1 1552 ( 1428 SM MU 1 2 60C1967 29MY1967 29.47507 ) 1.06059 ) 1550 1 1426 MR MS 1 2 50C1967 25MY1967 4.55953 1 7.72703 I ( 1553 I 1351 SG CI 1 2 60C1967 21AP1967 16.80376 ) 1.43988 ) ( 1.427 1 1350 LU BH 2 ? 29MY1967 19AP1967 2.90557 1 0.95152 ) ( 1417 1425 HO RA 2 2 22MY1967 25MY1967 1.91416 ) 12.02369 ) ( 1418 ( 1399 SH PW 2 2 22MY1967 5MY1967 5.97201 ) 5.0C544 ) ( 1.401 1 1352 HO KM 2 7 6MY1967 71AP1967 1.97554 ) 5.63477 1 1402 .1353 TR FR 2 2 6KY1967 23AP1967 4.07191 ) 0.07384 ) ( 1400 ( 1354 SB C-H 2 2 6MY1967 25AP1967 5.81368 ) C. 46949 ) ( 1.429 ( 1405 WL FS 2 ? 29MY1967 12MY1967 2.03843 ) 5.57275 I 1403 1407 CA SM 2 2 10CY1967 14MY1967 5.85851 I 6.11453 ) ( 1404 ( 1349 CI 2 ? 10MY1967 1SAP1967 3.45528 1 2.12659 ) C 1406 < 1471 GB r.H 2 2 13HY1967 23MY1967 0.09435 I 11.10340 ) 1419 1422 BU GA 2 2 23MY1967 23MY1967 12.5961.2 1 12.18004 1 ( 1420 ( 1423 IH KA 2 2 23MY1967 25KY1967 9.66767 ) 19.5264C ) ( 1424 KN 2 25MY1967 13.64242 ) 1430 MC 2 12JN1967 4.34246 ) Fvagilavia ovotonensrs var. ovegona Sov. Fvagilavia ovotonensis var. ovegona Sovereign, Trans. American Micr. Soc. 77:107. pi. 2, figs. 1-3. 1958. Cells in girdle view lanceolate, with expanded central portions and bluntly rounded to subcapitate ends. Cells joined by the valve faces of the expanded central portions into long, ribbon-shaped colonies. Specimens from Lake Michigan 55-150y long, 2.5-4u broad at the widest point. Valves elon- gate-lanceolate, central portion of the valve constricted, widest point lying on each side of the central area. Striae fine but distinct, 12-15 in 10y . Axial area narrow, central area a structureless transverse fascia. This species is one of the most widely reported of all freshwater plank- ton diatoms. Although most authors have chosen to treat all entities having similar colony form under the single epithet, the forms found in Lake Michi- gan are clearly separable into at least three series on the basis of mor- phology. The obvious differences in the size range of populations occurring in different lakes in Europe has been commented upon by Huber-Pestalozzi (1942). In Lake Michigan we have found occasional populations of apparent auxospores in the size range of 70-90u, clearly smaller than the maximum size of two of the entities in the complex. Nipkow (1927) has reported similar observations from Lake Zurich. It seems clear to us that, in its general usage, the name F. ovotonensis is applied to a complex of separate genetic entities. The proper taxonomic treatment of this complex is yet to be resolved. The treatment presented here appears reasonable on the grounds of morphologic criteria but further research may prove it to be inadequate. 81 269 FRS 146919 PFrriF TflT CH Nd nF STJTinN": 39 5JN1947 0.00152 1 1235 C 7 16JN1964 0.00282 ) 1248 B 3 24JL1964 C.C0788 ) C 1261 1 1377 B 3 E 6 2AU1964 7N01964 0.00589 ) C. 01000 ) 1264 1324 C» 1 F 2 10AU1964 6N01964 0.00772 ) 0.C0466 ) 1299 1452 E 2 E 2 120C1964 14JL1967 C. 00314 ) C.0C426 ) I 1454 ( 1535 E 5 C 7 15JL1967 20SE1967 0.00200 ) 0.00322 ) 1532 1539 A 3 C 3 18SE1967 40CIS67 0.00329 ) 0.00503 ) 1533 1393 A 4 CS17 19SE1967 13MY1967 C.CC928 ) C.0C274 ) ( 1395 ( 1521 GS19 SH 1 13MY1S67 18SE1967 0.00235 ) 0.00577 ) 1544 1522 HU 1 BH 1 20C1967 18SE1967 0.01191 1 0.05106 ) 1547 1523 MS 1 RA 1 20C1967 19SE1967 C. 01597 ) C.C1845 > ( 1531 1 1428 GH 1 HU 2 25SE1967 29MY1967 0.10989 ) 0.25310 ) 1545 1426 ML 1 MS 2 20C1967 29MY1967 0.02703 ) 0.47244 ) 1550 1417 MR 1 HO 2 50C1967 22MY1967 C. 01239 ) C. 02243 ) 1 1350 BH 2 19AP1967 0.01542 ) 1429 UL 2 29HY1967 0.04247 ) Fvagilavia heideni 0strup Synedra inflata Heiden, Mitt. Grossh. Meckl. Geol. Landesanst., 10(21): 14, fig. 19. 1900. Fvagilavia heideni 0strup, Danske Diat., p. 190, pi. 5, fig. 118. 1910. Fvagilavia inflata (Heid.) Hustedt in: Rabenhorst, Kryptog.-Fl. Deutsch- lands, 7(2)1:155, fig. 669. 1931. (non Pantocsek 1902). Cells in girdle view rectangular, in life attached by the valve sur- faces into band-shaped colonies. Valves lanceolate with expanded central portions and bluntly rounded to subcapitate ends. Specimens from Lake Michigan 22-40y long, 7-10y broad. Striae perpendicular to the midline of the valve throughout, 13-15 in lOu. Axial area wide, lanceolate, without any especially demarcated central area. Previous reports indicate that this entity is a littoral form in large lakes. In Lake Michigan it has only been noted in inshore areas. 253 FRINFLAT TCT NC CF STATICKS 1SAP1967 0.05506 I MQ 2 Fvagilavia heideni var. istvanffyi (Pant.) Fvagilavia istvanffyi Pantocsek, Res. Wiss. Erforsh. Balatonsees, p. 79, pi. 9, fig. 225, 1902. Fvagilavia inflata var. istvanffyi (Pant.) Hustedt in: Rabenhorst, Kryptog. Fl. Deutschlands, 7(2)1:156, fig. 669. 1931. Differs from the nominate variety in having more or less strongly tri- undulate margins and subcapitate to capitate ends. 254 FRINFLVI T01 NO OF STATIONS 1 I 1350 BH 2 19AP1967 0.00220 I Fvagilavia intermedia Grun. Fvagilavia intermedia Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 45, figs. 9-11. 1881. Cells in girdle view elongate-rectangular, in life attached by the valve surfaces into long, band-shaped colonies. Valves linear-lanceolate to lanceolate with rostrate to subcapitate ends. Specimens from Lake Michi- gan 25-65u long, 3-5u broad. Transapical striae perpendicular to the a- pical axis throughout, coarsely structured, 8-13 in 10y, finely cross-lineate. Axial area narrow, linear distinctly bordered. Central area a unilateral fascia, not visibly thickened, often indistinct or containing rudimentary striae. 82 This entity shows a great deal of variation in populations from Lake Michigan. Although previous reports indicate that it is primarily littoral in most habitats, it is present in the offshore plankton from Lake Michi- gan and often in considerable quantity. The forms occurring in the off- shore plankton tend to be more elongate and lanceolate rather than linear in outline and may represent a separate variety or form. Our observations to date, however, indicate that these forms grade into the nominate variety to the extent that they cannot be satisfactorily separated on the basis of morphologic characteristics. Petersen (1938) and several other authors have called attention to the similarity of this taxon to Synedva vaucheviae Kiitz. [Fvagilavia vau- aheriae (Kiitz.) Peters.]. It is Peterson's contention, based on the obser- vation of isotype material, that the two entities are synonymous. If this contention can be supported, the entity we treat here, as it is generally treated in the modern literature, will need to be renamed as it is easily distinguished from S. vaucheviae on several morphologic characteristics. The decision on this awaits the monographer with access to type material. Ahlstrom (1936) reported Fragilaria vivescens Ralfs abundant in col- lections from Lake Michigan. We suspect that he was, in fact, dealing with the entity we treat here. 255 FRINTERf IC1 NO OF STATI ENS 142 146921 (46916 CH CH 23N01945 4MY1947 C. 00194 ) 1 0.00204 ) 46914 46919 CH CH 19AP1946 5JN1947 0.001107 1 0.39 453 ) (46923 (46922 CH CH 22NC1946 21AU1947 C.0C437 ) C. 00048 ) (46758 (46770 EV EV 5JN1937 9JL1937 1.09835 ) 0.28626 ) 46771 46764 EV EV UJN1937 17J11937 0.00238 ) 0. 20951 1 (46745 (46757 EV EV 3JL1937 25JL1937 C.C2090 ) C. 29849 ) (46747 EV 1AU1927 22SE1937 0.45053 ) 0.05909 ) 46763 46750 EV EV 23AU1937 24SE1937 0.87256 ) 0.03299 ) (46752 (46748 EV EV 15SE1937 130C1937 C. 39182 ) C.C2135 ) (46767 (46762 EV EV 270C1937 18MR1938 0.03095 ) ( 0.19850 ) 46749 46772 EV EV 12CR1938 18AP1938 0.03641 ) 0.00710 1 (46768 (46756 EV EV 16MR1938 27AP1938 C. 05880 ) C.C1175 ) (46759 ( 1225 EV C 6 19MY1938 15KY1964 0.01350 ) 0.00784 1 46761 1226 EV C 7 27MY1938 16MY1964 0.01363 ) 0.01142 ) (46766 ( 1227 EV C* 2 14DE1938 13MY1964 C. 04753 ) C.CC110 > ( 1228 D E 2 3 14MY1964 16MY1964 0.00389 ) 0.00245 ) ( 1229 1232 0 E 5 5 14MY1964 16HY1964 0.01057 1 C. 12870 1 ( 1230 ( 1233 E B 2 3 16MY1964 5JN2964 C. 01778 ) C. 00238 ) ( 1439 B 6 5JN1964 10JN1964 0.00599 ) 0.02301 ) 1236 1241 C E 1 2 8JN1964 13JN1964 0.00700 ) 0.02218 ) ( 1239 ( 1242 D E 4 3 11JN1964 13JN1964 0.10212 1 0.06294 ) ( 1243 E F 6 13JN1964 11JIU964 0.03550 ) 0.05379 ) 1244 1252 F C 1 1 11JN1964 16JL1964 0.00329 ) 0.01395 ) ( 1245 ( 1254 F 0 2 2 11JN1964 15JL1964 C.0C692 1 0.00192 ) ( 1256 E 2 14JL1964 6JL1964 0.00916 ) 0.0C191 1 1257 1267 E 0 3 t 14JL1964 18AU1964 0.01675 ) 0.01513 ) ( 1258 ( 1268 F E 1 2 6JL1964 15AU1964 C. 00472 ) 0.0C274 1 ( 1269 E D 3 2 15AU1964 _U5EJ964 0.00274 ) 0.CC645 I 1270 1284 F E 1 6 10AU1964 17SE1964 0.00817 ) 0.00318 ) ( 1273 ( 1285 C" F 2 1 10SE1964 15SE1964 C. 00538 ) C.1C483 1 ( 1289 C 7 140C1964 14001964 0.01319 ) 0.00762 ) 1291 LU.Q3 C E 2 6 160C1964 13CC1964 C. 00.245 ) 0.04478 ) ( 1292 ( 1305 D F 1 2 150C1964 HOC 1964 0.00373 ) C.0C173 I ( 1308 C 7 6N01964 7N01964" 0.01217 1 0.00190 1 1313 1321 0 E 3 5 9N01964 7N01964 C. 00193 > 0.00319 ) ( 1316 ( 1322 0 E 6 6 9N01964 7NC1964 C.O0756 ) C. 02333 ) ( 1323 F 1 6N01964 2MR1967 0.00139 ) 0.5 1441 ) 1324 1338 F C 2 3 6N01964 28KR1967 0.00233 ) 0.67 964 ! ( 1336 ( 1339 C C 3 5 27JA1S67 28MR1967 C. 01348 ) C. 43649 ) ( 1340 C 7 28MR1967 0.91624 ) 0.24316 ) 1341 L1344 A C 3 3 19AP1967 25AP1967 1.51372 ) 1.15808 1 ( 1342 ( 1345 A C 4 5 19AP1967 25AP1967 C. 58831 ) C. 45611 1 ( 1346 C 7 21AP1967 4MY1967 0.23367 ) 0.73516 1 1347 1369 E A 2 4 23AP1967 4MY1967 0.06178 ) 0.14164 ) ( 1348 ( 1370 E A 5 6 23AP1967 3MY1967 C. 76765 ) C. 44424 ) ( 1371 c 3 4MY1967 7MY1967 C. 21007 1 a, 37956 ) 1372 1375 C E 5 3 5MY1967 7MY1967 C. 12768 ) C. 13234 1 ( 1373 ( 1376 C E 7 5 5MY1967 6MY1967 C. 99835 ) C. 98381 ) ( 1408 ( 1411 A C 3 3 23MY1967 31MY1967 0.06260 ) 0.14360 ) 1409 1412 A C 4 5 23KY1967 31MY1967 0.10415 ) C.07155 ) ( 1410 ( 1413 A C 6 7 24MY1967 25MY1967 C. 03383 ) C. 01264 ) ( 1414 E 2 28MY1967 1SE1967 0.02687 ) 0.00307 ) 1415 1536 E E 3 2 28MY1967 24SE1967 0.00675 ) C. 00318 ) ( 1416 ( 1537 E E 5 3 28KY1967 24SE1967 C. 01093 ) C.0C431 I ( 1538 E 5 23SE1967 12HY1967 0.04972 ) 0.01174 ) 1387 ( 1392 GS11 GS16 12MY1S67 12MY1967 C.C1980 ) 0.01849 ) ( 1389 ( 1398 GS13 GS22 12MY1967 14MY1967 C. 00516 ) C.OC607 ) ( 1559 GS 7 ■-GS22 HO 1 KW 1 SM 1 40C1967 60C1967 20SE1967 ?nSF10A7 60C1967 21AP1967 0.00350 1 CLJLQ.575.) 0.06258 ) ?.*743F 1 0.02641 I 0.00621 ) 1567 1575 GS15 GS28 50C1967 60C1967 0.00159 ) 0.00258 I 1 1571 ( 1522 GS19 BH 1 60C1967 18SE1967 C. 00059 ) C. 00365 1 ( 1526 1 1 529 ( 1552 1527 1530 1550 1427 TR FR MR 1U 1 1 1 2 20SE1967 74SE1967 5CC1967 29MY1967 0.13836 ) C. 02000 ) 0.06195 ) 0.01211 ) ( 1528 1 1551 ( 1553 ( 1418 SB ES SG SH 1 1 1 2 20SE1967 50C1967 60C1967 22MY1967 C. 01444 ) C. 01598 ) CO 1469 ] C. 01555 ) ( 1350 BH TR 2 2 19AP1967 6CY1967 C. 16960 1 0.02707 ) 1399 1352 Pk KW 2 2 5MY1967 21AP1967 C. 04081 1 0.18038 ) ( 1401 ( 1353 PC FR 2 2 6MY1967 23AP1967 0.03528 I 0.01055 ) ( -1354 1 1421 GH f.H 2 ? 25AP1967 23MY1967 0.00518 ) 0.01735 1 1404 M0 2 10MY1967 0.01270 ) ( 1407 SM 2 14MY1967 C. 01194 ) 83 Fragilaria 'intermedia var. fallax (Grun.) Synedra (amphicephala v. ??) fallax Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 39, fig. 16c. 1881. Fragilaria vaudheriae var. fallax (Grun.) A. Cleve-Euler, K. Svenska Vet.-Akad. Handl., Fjarde Ser., 4(1) :43, figs. 353s-x. 1953. Valves more elongate and narrower than in the nominate variety, occasional specimens to 120y long, linear to linear-lanceolate. Other features essentially as in the nominate variety. 256_ FBIMTEVL TCT NO CF STATlfNS 256 l/,nQ73 CH 1H76 19.BB6A3 1 1 3541] r.H 11MY1879 4.7B964 1 ( 3541 CH 1FF1881 C. 65538 1 ( 3507 CH 19FE1881 1.81118 ) (46910 CH 0C1945 3.12404 1 (46921 CH 23N01945 1.70214 1 (46908 CH CE1945 0.21148 ) (46917 CH 12JA1946 0.66676 ) (46915 CH 20FE1546 1.47954 ) (46914 CH 19AP1946 3.60907 ) (46924 CH 10HY1946 2.43030 ) (46923 CH 22N01946 5.75250 ) (46970 CH 20DE1946 2.91402 1 (46905 CH JA1947 3.14622 ) (46909 CH KR1947 3.11006 ) (46912 CH AP1947 C. 90836 1 (46916 CH 4KY1947 C. 48518 ) (46906 CH HY1947 C. 51768 ) 146919 CH 5JN1947 0.00303 1 (469C7 CH JL1947 0.70515 ) (46913 CH 6AU1947 C.02092 ) (46922 CH 21AU1947 0.37802 ) (46758 EV 5JN1937 4.69296 ) (46771 EV 11JN1937 0.39941 ) 146743 FV 20JN1937 2.99734 ) (46745 EV 3JL1937 10.53292 ) (46770 EV 9JL1937 0.83492 1 (46764 EV 17JL1937 2.48187 1 (46757 EV 25JL1937 0.89548 1 (46747 EV 1AU1937 8.59470 1 (46763 EV 23AU1937 3.4C909 ) (46765 EV 30AU1937 0.62465 ) (46769 EV 7SE1937 C. 69475 ) (46752 EV 15SE1937 9.14236 ) (46760 EV 22SE1937 9.23728 1 (46750 EV 24SE1937 1C. 42560 ) (46748 EV 130C1937 3.97096 ) (46767 EV 270C1937 3.79096 ) (46749 EV 12HR1938 4.41801 ) (46768 EV 16MR1938 5.35058 ) (46762 EV 18MR1938 5.77856 ) (46751 EV 30HR1938 7.5C335 ) (46772 EV 18AP1938 3.57700 ) (46756 EV 27AP1938 2.58576 ) (46759 EV 19HY1938 2.64686 1 (46761 EV 27MY1938 2.67088 1 (46766 EV 14DE1938 4.72117 1 ( 1223 B 3 18HY1964 0.02656 ) ( 1224 R 4 18MY1964 0.07646 ) ( 1225 C 6 15HY1964 0.14112 ) ( 1226 C 7 16HY1964 0.05327 ) ( 1227 C 2 13MY1964 0.06470 ) ( 1228 0 2 14NY1964 C. 40873 1 ( 1229 D 5 14MY1964 C. 54133 ) 1 1231 F 3 16MY1964 0.11007 1 < 1232 E 5 16KY1964 1.21743 ) ( 1234 B 3 18JN1964 0.00562 1 ( 1439 B 6 5JN1964 0.00799 ) ( 1236 C 1 8JN1964 0.00*700 ) ( 1237 C* 2 8JN1964 0.00258 ) ( 1238 0 3 11JN1964 C. 28000 ) ( 1239 0 4 11JN1964 0.37830 ) I 1240 0 6 10JN1964 0.02301 ) ( 1241 E 2 13JN1964 0.2277C ) ( 1242 E 3 13JN1564 C. 11090 » ( 1243 E 6 13JN1964 0.C3758 ) ( 1244 F 1 11.1N1964 0.00768 ) ( 1245 F 2 1UN1964 C. 02766 1 ( 1246 F 3 11JN1964 C.2C917 ) ( 1248 B 3 24JL1964 0.00197 ) ( 1250 C 6 10JL1964 0.00822 ) ( 1252 C* 1 16JL1964 C. 02232 ) ( 1254 D 2 15JL1964 0.00958 ) ( 1256 E 2 14JL1964 C. 07694 ) ( 1257 E 3 14JL1964 C. 01436 1 ( 1258 F 1 6JL1964 0.01416 ) ( 1259 F 2 6JL1964 C. 00620 I ( 1260 F 3 6JU964 C. 01528 ) ( 1261 B 3 2AU1964 0.00196 I ( 1263 C 7 15AU1964 0.00400 1 ( 1264 C 1 10AU1964 C.CC193 ) ( 1265 C" 2 10AU1964 0.00671 ) ( 1269 E 3 15AU1964 0.00548 1 ( 1270 F I 1CAIU964 C.0C272 ) ( 1771 C 7 22SE1964 0.00653 ) ( 1273 C 2 10SE1964 0.00538 ) ( 1278 0 6 18SE1964 0.00384 ) ( 1279 E 1 16SE1964 0. 00393 ) ( 128C E 2 16SE1964 0.00681 ) ( 1281 E 3 16SE1964 C. 00392 ) 1 17B4 E 6 17SF1964 0.00635 ) ( 1285 F 1 15SE1964 0.04659 ) ( 1286 F 2 15SE1964 0. 01095 ) ( 1288 B 3 150C1964 0.00653 ) ( 1445 B 6 140C1964 0.00652 ) ( 1289 C 7 140C1964 C.CC440 ) ( 1795 D 4 150C1964 0.00595 ) ( 1297 D 6 140C1964 0.07997 ) ( 1298 E 1 120C1964 C. 01077 ) ( 1300 E 3 130C1964 0.00716 1 ( 1302 E 5 130C1964 C. 02429 1 ( 1303 E 6 130C1964 C.1C075 ) I H04 F 1 110C1964 0.00494 ) I 1307 B 6 N01964 C. 01082 1 ( 1308 C 7 6NC1964 C.CC912 ) ( 1313 D 3 9N01964 0.00386 ) ( 1314 0 4 9NG1964 C. 00287 I ( 1316 D 6 9N01964 C. 05289 ) I 1317 El 6N01964 0.00383 ) ( 1319 E 3 7N01964 0. 00262 ) ( 1320 E 4 7M01964 C.O02O7 1 ( 1321 E 5 7N01964 0.00638 ) ( 1322 E 6 7N01964 0.02999 ) ( 1324 F 2 6NQ1964 C.0C466 1 < iv> F 3 6N01964 0.00252 ) ( 1336 C 3 27JA1967 0.02888 1 ( 1337 C 3 2HR1967 C.1C876 ) ( 1338 C 3 28MR1967 0.01983 1 ( 1339 C 5 28MR1967 0.02806 ) ( 1340 C 7 28MR1967 C. 06036 ) ( n41 A 3 19AP1967 0.1C197 ) ( 1342 A 4 19AP1967 0.34829 ) ( 1343 A 6 19AP1967 C.C8962 ) ( 1344 C 3 25AP1967 0.11581 ) ( 1345 C 5 25AP1967 0. 21051 1 ( 1346 C 7 21AP1967 C. 46733 ) I 1347 F 7 73AP1967 0.38046 I ( 1348 E 5 23AP1967 0.52776 1 ( 1368 A 3 4HY1567 C. 43984 ) ( 1369 A 4 4MY1967 0.27582 ) ( 1370 A 6 3MY1967 0.60536 ) ( 1371 C 3 4MY1967 1.18657 ) ( 1H77 C 5 5MY1967 0.49652 ) ( 1373 C 7 5HY1967 0.59901 ) ( 1374 E 2 7HY1967 C. 50209 ) { 1375 E 3 7MY1967 0.42109 1 ( 1376 E 5 6MY1967 1.83832 1 ( 1408 A 3 23HY1967 C. 62603 ) ( 1409 A 4 23MY1967 0.35410 ) ( 1410 A 6 24KY1967 0.03383 1 ( 1411 C 3 31MY1967 C. 63185 1 ( 1412 c 5 31MY1967 C. 58928 ) ( 1413 C 7 25HY1967 0.88448 ) ( 1414 E 2 28HY1967 C.47C19 ) 1 1415 F 1 28MY1967 0.31479 ) ( 1416 E 5 28HY1967 1.98998 ) ( 1431 A 3 12JN1967 0.04635 1 ( 1432 A 4 13JN1967 3.03975 ) ( 1433 C 3 17JN1967 1.13034 ) ( 1434 C 5 17JN1967 1.15145 ) ( 1435 c 7 13JN1967 0.38519 ) ( 1436 E 2 15JN1967 1.64640 ) ( 1437 E 3 15JN1967 3.01456 ) ( 1438 E 5 14JN1967 7.87945 1 ( 1446 A 3 11JL1967 0.00245 ) ( 1449 C 3 16JL1967 C. 85419 ) ( 1450 C. 5 16JL1967 0.06665 ) ( 1451 C 7 16JL1967 0.00394 ) ( 1452 E 2 14J0967 C. 13412 ) ( 1453 E 3 15JL1967 0.64707 ) ( 1504 A 3 28AU1967 0.01234 1 ( 1510 C 7 29ALU967 C.0C316 1 1 1511 F 7 1SF1967 0.00614 ) 1 1512 E 3 1SE1967 0.02356 ) ( 1536 E 2 24SE1967 C. 03545 ) | 1537 e 3 24SE1967 0.00863 ) ( 1538 E 5 23SE1967 C. 07734 ) ( 1539 C 3 40C1967 C. 01006 ) l 1540 r 5 4DC1967 0.02482 1 1 1541 E 2 110C1967 0.00532 ) ( 1542 E 3 HOC 196 7 C. 00509 ) ( 1377 GS 1 9MY1967 5.2642C 1 ( 1378 GS 2 9MY1967 13.83457 ) ( 1379 GS 3 9HY1967 9.09879 > 1 I3B0 GS 4 9MY1967 9.18110 ) ( 1381 GS 5 10MY1967 12.18814 I (1382 GS 6 10MY1967 15.34875 ) ( 1383 GS 7 10MY1967 12.35030 ) ( 1384 GS 8 10MY1967 13.58721 ) ( 1385 GS 9 10MY1967 8.0761C 1 I HIM KSir 17MY1Q67 H.HSM 1 1 13A7 CI 1 1 17KY1967 4.71374 1 ( 1 3RB PS17 17HY1967 C.5B577 1 ( 1389 GS13 12MY1967 0.51569 ) ( 1390 GS14 12HY1967 0.75749 1 ( 1391 GS15 12MY1967 3.35201 ) ( 1392 GS16 12MY1967 4.53C46 1 I 1393 GS17 13KY1967 5.75279 ) ( 1394 GS18 13MY1967 3.73275 1 ( 1395 GS19 13MY1967 0.25836 1 ( 1396 GS20 13MY1967 0.00444 1 ( 1397 GS21 13MY1967 C.C2028 > 1 139B GS22 14MY1967 0.39469 1 ( 1554 GS 1 3CC1967 C. 00712 ) ( 1555 GS 2 30C1967 C.C1412 ) ( 1557 GS 4 3GC1967 0.03363 1 ( 1558 GS 5 40C1967 C. 02775 1 ( 1559 GS 7 40C1567 C. 00350 ) 1 1560 GS 8 40C1967 0.01417 1 ( 1561 GS 9 4GC1967 0.01761 1 ( 1562 GS10 50C1967 C.C1480 ) ( 1563 GS11 50C1967 0.03507 ) ( 1564 GS12 50C1967 0.00823 ) ( 1565 GS13 50C1967 C. 01014 ) I 1566 GS14 50C1967 0.05870 ) ( 1567 GS15 50C1967 0.03175 ) ( 1568 GS16 50C1967 C. 17171 1 ( 1569 GS17 50C1967 0.41621 ) ( 1570 GS18 5CC1967 0.00992 ) ( 1571 GS 19 60C1967 C.0C82C ) 1 1573 GS21 60C1967 0.00560 ) I 1574 GS22 60C1967 0.02301 1 ( 1575 GS28 60C1967 C.0C516 ) ( 1544 PU 1 2CC1S67 0.0C238 ) ( 1524 MI 1 20SE1967 0.02189 1 ( 1546 LU 1 20C1967 C.C1000 ) [ 1520 Ffl 1 18SE1967 0.00943 i 1 1521 SH 1 18SE1967 C. 06347 > ( 1523 "A 1 t9S£1967 C. 02768 ) 84 f 1526 ( 1530 HO 1 FR 1 20SE1967 24SE1967 0.21619 ) 0.05001 ) ( 1527 ( 1545 TR 1 WL 1 2CSE1967 2CJC1567 C. 27044 ) C. 02703 ) 1529 1548 KW 1 CA 1 20SE1967 30C1967 C. 02398 1 — C.C5088 1 ( 1552 ( 1428 SM 1 NU 2 LU 2 BH 2 6CC1967 29MY1967 2SMY1967 19AP1967 0.13206 ) 0.15668 ) I 1S5C ( 1426 MR 1 MS 2 50C1967 29MY1967 C. 30975 ! C. 45144 ) 1553 1351 SG 1 M 2 60C1967 21AP1967 C.C1469 ) 1.34057 ) ( 1427 ( 1350 2.51816 ) 0.14097 ) ( 1417 ( 1425 HC 2 RA 2 22MY1967 25MY1967 2.93106 ) C. 55698 ) 1418 1399 SH 2 PW 2 22MY1967 5MY1967 C.8C871 ) 1.3C577 ) I 1401 ( 1352 K0 2 KW 2 WL 2 ...E.S .2 GB 2 CH 2 6KY1967 21AP1967 29KY1967 12MY1967 13MY1967 23MY1967 1.97554 ) 2.74867 ) 0.40344 ) 0.25155 ) 0.0C270 ) 0.13879 ) < 1402 ( 1353 TR 2 FR 2 6MY1967 23AP1967 2.51245 I 0.29536 ) 1400 1354 1404 1349 SB 2 GH 2 fC 2 CI 2 6MY1967 25AP1967 10KY1967 19AP1567 2.95449 ) C. 23302 ) ( 1429 .. 1 .1.4.0 5. _ ( 1403 ( 1407 ( 1415 ( 1422 CA 2 SM 2 BU 2 GA 2 10MY1967 14MY1567 23MY1967 23MY1967 10.04315 ! C. 11345 ) C. 72409 ) C. 63223 ) ( 1406 ( 1421 C. 95203 ) C. 42916 ) 1420 1423 Ih 2 WA 2 23MY1967 25MY1967 C.12C85 ) 1.84987 ) ( 1424 KN 2 25MY1567 0.46629 ) ( Fragilaria leptostauron (Ehr.) Hust. B-iblam-vm leptostauron Ehrenberg, Mikrogeol., pi. 12, figs. 25-36. Fragilaria leptostauron (Ehr.) Huatedt in: Rabenhorst, Kryptog.-Fl. Deutschland, 7(2)1:153, figs. 668a-b. 1931. 1854. Cells in girdle view short rectangular, attached by the valve faces into short, often irregular or disorganized, band-shaped colonies. Valves lanceolate with extremely expanded centers, larger specimens cruciate in outline. This central expansion appears as a line or double line, depending on the level of focus, when the colony is seen in girdle view. Specimens from Lake Michigan 8-30u long, 7-18ubroad. Striae very coarse, chambered 5-9 in lOu, distinctly cross lineate. Axial area moderafely broad, lanceo- late in shape. No distinguishable central area is present. This, species is extremely variable in outline and ornamentation and deformed or abnormal specimens are common in our collections. 257 FRLEP1CS TCT NC CF STATIONS 107 (6C973 ( 3507 CH -_.£H . CH CH CH r.H 1876 19FE1881 20FE1946 22N0..1946_. MR1947 5.1N1947 0.11809 1 0.04528 ) ( 3540 (46921 CH CH 11MY1875 23N01945 19AP1946 200E1946 4MY1947 JL1947 0.05125 ) 0.00905 ) 0.00854 ) 0.00585 ) ( 3541 (46917 (46924 (469C5 CH CH CH CH — 1FE1881 12JA1946 10MY1946 JA1947 C. 00978 ) 0.0C139 ) C.CC635 ) C. 00245 ) (46915 (46923 0.C3983 ) 0.02404 1 6.00455 1 0.00910 1 (46514 (46920 (46516 (46907 CH CH CH CH (46909 (46919 0.00475 ) 0.00937 ) (46906 (46922 CH CH MY1547 C.0C796 ) (46758 [46764__ (46763 ( 4676 0 EV _.EV. EV ._ EV EV FV 5JN1937 1J.JLL9 3 7__. 23AU1937 _ -22SE1937 130C1937 1RMR1938 0.15334 ) _0..1.0475 | 0.12175 ) 0,00985 ) 0.40564 ) 0.15439 1 (46771 146757 ( 46765 (46750 (46767 (46756 EV EV EV EV EV EV 11JN1937 25JL1937 30AU1537 24SE1937 270C1S37 27AP1938 C. 00475 ) 0.11073 1 0.00558 1 0.01414 ) C. 06 189 I 0.00336 1 (46743 (46747 (46752 (46744 EV EV EV EV 20JM937 1AU1937 15SE1937 60C1937 16MS1938 19MY1938 C. 02569 ) C. 05198 ) C. 17414 ) 0.00488 ) 146748 (4676? (46768 (46759 EV EV C.C4410 ) (46766 - ( 1240,. . EV .._ ..JL.6. C 1 E._L E 5 r> 6 14DE1938 1-0.JM19.6A_ 10AU1964 1CAU.1964... 16SE1964 14nf,1964 C. 03169 1 0.05829 1 0.0C193 ) 0.00272 1 6. 012;! 6 1 0.00381 ) ( 1235 < 1243 ( 1265 ( 1271 ( 1284 ( 13C0 C 7 E 6 16JN1964 13JN1964 0. 00282 I C.C9396 ) ( 1238 ( 1252 C C 3 1 11JN1964 16JL1964 C.CC2CC ) C. 00558 ) ( 1264 ( 1270,.. C 2 C 7 10AU1964 22SE1964 0.00224 ) 0.01306 ) ( 1267 ( 1279 0 E 6 I 18AU1964 16SE1564 0.CC216 ) C. 01571 ) ( 1283 I 1297 E 6 E 3 17SE1964 130C1964 0.02542: ) C. 00358 ) ( 1285 ( 1302 F E 1 15SE1964 0.01165 ) C.C1215 ) C.CC191 ) ( 1303 ( 1318 E 6 E 2. A 3 . -A__3 C 3 E 5 130C1964 7N01964 19AP1967 4MY1967 16JL1967 innr.196 7 C.CC560 > 0.00190 ) ( 1308 ( 1322 C 7 E 6 6N01564 7N01964 0.00304 ) C.C1666 ) ( 1317 ( 1338 E C I 3 5 3 6NC1964 28MR1967 23AP1967 31MY1967 ( 1341 ( 1368 0.OC217 ) 0.00314 ) 0.00382 ) C.0C718 I I 1343 1 1371 A 6 C 3 19AP1967 4MY1567 0.00556 ) 0.00231 I ( 1348 ( 1411 E C C.0C274 ) C.0C410 1 1 1541 ( 1536 ( 1386 E 2 GS10 24SE1967 12MY1967 0.00273 ) 0.00862 ) ( 1538 ( 1387 E 5 GS11 23SE1967 C. 06076 ) ( 13B8 I 1394__ GS12 . ..GS.UL GS13 GS17 GS22 0.01642 ) ( 1269 ( 1274 E 0 2 1 15AU1964 17SE1964 0. 00274 ) 0.00938 ) ( 1271 ( 1275 C 0 7 2 22SE1964 17SE1964 0.C2611 ) C.CC645 ) 18SE1964 0.01118 I 16SE1964 0.OC393 ) 86 1 1 JB? F 4 16SF1964 O.Olinfl 1 1283 F 5 16SF1964 0.01839 1 1284 E 6 17SE1964 C. 26914 ) ( 1285 ( 1289 F C 1 7 15SE1964 140C1964 0.01747 ) C.C0440 ) 1286 1294 F D 2 3 15SE1964 150C1964 0.01095 ) C. 00330 ) 1287 1296 F 0 3 5 15SE1964 14GC1964 C. 00500 ) 0.01574 ) ( 1297 ( 1301 0 E 6 6 140C1964 130C1964 0.07997 ) 0.15672 1 1299 13C4 E F 2 1 120C1964 11GC1964 0.00314 ) C. 00494 ) 1302 1311 E D 5 1 13GC1964 8NG1964 0.12552 1 0.00258 ) ( 1316 ( 1321 D E 6 5 ■ 9N01964 7N01964 0.00756 ) 0.00638 ) 1318 1322 E E 2 6 7N01964 7NG1964 G.C0190 ) C. 02999 ) 1320 1336 E C 4 3 7NG1964 27JA1967 C. 00207 ) C.CC193 ) ( 1337 1 1340 C c 3 7 2MR1S67 28MR1967 0.00147 ) 0.43267 ) 1338 1341 C A 3 3 28MR1967 19AP1967 0.C0264 ) 0.00542 ) 1339 1342 G A 5 4 28MR1967 19AP1967 C.0C312 ) C.0C722 ) ( 1343 ( 1347 A E 6 2 19AP1967 23AP1967 0.38905 1 0.00163 ) 1345 1348 C E 5 5 25AP1967 23AP1967 0.00195 ) C. 00960 ) 1346 1368 C A 7 3 21AP1967 4MY1967 C.0C801 1 C.0C314 ) ( 1369 ( 1376 A E 4 5 4MY1967 6MY1967 0.01118 ) 0.00281 ) 1370 1408 A A 6 3 3KY1967 23MY1967 0.04143 ) 0.00447 ) 1374 1413 E C 2 7 7MY1967 25PY1967 C.0C299 ) C.0C632 ) ( 1449 ( 1512 C E 3 3 16JL1967 1SE1967 0.00764 ) 0.00393 ) 1452 1532 E A 2 3 14JL1967 18SE1967 0.00639 ) C. 00329 ) 1508 1533 c A 3 4 2SE1567 19SE1967 C.CC400 ) C. 01393 ) ( 1534 ( 1538 A E 6 5 19SE1967 23SE1967 0.0062O 1 1.80081 ) 1536 1541 E E 2 24SE1S67 110C1967 C. 01909 ) C. 01064 1 1537 1543 E E 3 5 24SE1961 100C1967 C.C1725 ) C. 12211 ) ( 1382 ( 1386 GS 6 GS10 10MY1967 12MY1S67 0.00278 ) 0.00575 ) 1383 1387 GS 7 GS11 10HY1967 12MY1967 0.00802 ) C. 38419 ) 1384 1388 GS 8 GS12 10MY1967 12MY1567 C.C1109 ) 0.01207 ) ( 1389 ( 1392 GS13 GS16 12MY1S67 12MY1967 0.07220 ) 0.09862 1 1390 1393 GS14 GS17 12MY1967 13MY1967 0.01762 ) 0.01644 ) 1351 1394 GS15 GS18 12MY1967 13MY1967 C.C1915 1 C.C2580 I ( 1395 ( 1398 GS19 13MY1967 14MY1967 0.00939 ) 1.06263 ) 1396 1554 GS20 GS 1 13MY1967 3GC1967 0.13762 ) 0.01779 ) 1357 1555 CS21 GS 2 13MY1967 30C1967 C.CC981 ) C.0C353 ) ( 1556 ( 1559 GS GS 3 •7 3CC1967 40C1967 0.02607 ) 0.02448 ) 1557 1560 GS GS 4 8 3GC1967 40C1967 0.06353 ) C. 01417 ) 1558 1562 GS 5 GS10 40C1967 50C1967 C.3C918 1 C.0C493 ) ( 1563 ( 1566 GS -G.S. GS —GSj LI 4 50C1967 50C1967 0.00701 ) 0.00917 ) 1564 1567 GS12 GS15 50C1967 50X1967 C. 00329 ) 0.11114 ) 1565 1568 GS13 GS16 50C1967 50C1967 C. 44620 ) C. 05195 ) { 1569 1 ,1512 _ L7 !0 50C1967 60C1967 0.02676 ) 0.46326 ) 1570 1573 GS18 GS21 5GC1967 60C1967 0.03967 ) 0. 22396 ) 1571 1574 GS19 CS22 60C1567 60C1967 C. 21893 ) 7.44981 ) ( 1575 .( 1524 GS28 mi i 60C1967 P0SE1967 0.45157 ) 0.08757 ) 1544 1546 MU LU 1 1 20C1967 2GC1967 0.00715 ) C. 03001. 1 1547 1520 cs Ml 1 1 20C1967 16SE1967 C. 02395 ) C. 43849 ) ( 1521 i 1525 SH PW 1 1 18SE1967 2CSE1967 0.01154 ) 0.27851 ) 1522 1526 BH MC 1 1 18SE1967 20SE1967 0.03100 ) 40.32542 ) 1523 1527 RA TR 1 1 19SE1967 20SE1967 C. 01845 ) 55.67294 ) ( 1528 _I 1531, SB ' GH 1 1 20SE1967 25SE1967 13.62980 ) 0.03381 ) 1529 ^1545 Kh 1 1 20SE1967 20C1967 36.64708 ) 3.89215 1 1530 1549 FR 1 1 24SE1967 4CC1967 C. 20002 ) C.C41U ) ( 1551 ( 1553 ES 1 1 5CC1967 60C1967 0.01598 ) 3.17274 I 1552 1426 SM MS 1 ? 6GC1967 29MY1967 6.97260 1 0.08399 1 1550 1351 PR pi I 2 50C1967 21AP1967 13.08388 1 ( 1417 ( 1475 HO RA 2 7 ' 22MY1967 25MY1967 0.10842 ) 0.01768 ) 1418 1399 SH Pta 2 _2 22MY1967 5KY1967 0.4510], ) 1.52339 1 1350 1401 BH 2 19AP1967 C. 24669 ) ( 1402 ( 1353 TR 2 7 6CY1967 23AP1967 8.49036 ) 0.04219 1 1400 1354 1407 1421 SB GH 2 2 6MY1967 25AP1967 2.76388 ) 0.01899 ) 1352 14C4 KM PQ 2 2 21AP1967 10MY1967 3.29840 ) C.6C976 ) . ( 1405 I 1406 ES GB 2 2 12MY1967 13MY1967 0.03225 1 0.0C270 ) SM CH 2 ? 14MY1967 23MY1967 5.25467 ) 0.01735 ) 1349 1422 CI GA 2 7 19AP1967 23PY1967 0.17243 ) C. 02555 ) ( 1423 WA 2 25MY1967 0.13703 I 1424 KN 2 25KY1967 0.06661 ) Fragilavia pinnata var. intevcedens (Grun.) Hust. Fvagilavia mutabile var. intevcedens Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 45, fig. 13. 1881. Fvagilavia pinnata var. intevcedens (Grun.) Hustedt in: Rabenhorst, Kryptog.-Fl. Deutschland, 7(2)2:161. 1931. Distinguished from the nominate variety by its strictly linear shape, more robust structure and wider axial area. Striae 6-9 in lOy, shorter than in the nominate variety. The status of this entity is questionable. Its morphology, except for the lack of marginal spines and presence of cross lineation in the striae, is very similar to the linear forms of F. spinosa Skv. The relationship between F. mutabile (Wm. Smith) Grun., F. pinnata Ehr. and their numerous described varieties and Skvortzow's taxon should be critically reexamined. JAfl FRSPECOD TCT HC CF STATIONS 146914 CH CH EV 19AP1946 0.00107 ) 46520 CH 20DE1946 C. 00031 I (469C6 CH MY1941 C. 00066 ) (46907 146747 JL1947 1AU1937 0.00148 ) 0.00495 ) 46758 46748 EV EV 5JN1937 130C1937 0.00713 ) 0.04270 ) (46764 (46767 EV EV 17JL1937 270C1537 C.O08O6 ) C. 00387 ) (46768 I 1284 EV E 6 16MR1938 17SE1964 0.01470 ) 0.00318 ) 46762 1343 EV A 6 18MR1938 19AP1967 0.02206 ) 0.00139 ) (46751 ( 1387 EV GS11 30MR1938 12MY1967 0.01117 ) C. 01188 ) ( 1388 ( 1569 GS12 GS17 12MY1567 50C1967 0.00603 ) 0.00149 ) 1398 1574 GS22 GS22 14MY1967 60C1967 0.00304 ) 0.04315 ) ( 1567 ( 1525 C-S15 PU 1 50C1967 20SE1967 C.0C159 ) C. 02785 ) ( 1526 1 15-i? MO 1 SM 1 20SE1967 60C1967 0.03982 ) 0.00660 ) 1527 1550 TR 1 MR 1 20SE1967 50C1967 0.05660 ) 0.01239 ) ( 1528 ( 1351 SB 1 KI 2 2CSE1967 21AP1967 C. 01444 ) 0.00310 ) ( 1418 1 140 7 SH 2 TR 2 22MY1967 6CY1967 0.06221 1 0.01624 ) 1399 1352 PW 2 Kk 2 5MY1967 21AP1967 0.0O680 1 0.00859 ) ( 1401 ( 1407 PO 2 , SM 2 6MY1967 14MY1967 C. 03528 ) G. 01194 ) 87 Fragilaria pinnata var. lanaettula (Schum.) Hust. Fragilaria lanoettula Schumann, Schrift. Phys.-Okon. Ges. Konigsberg, pi. 1, fig. 4. 1867. Fragilaria -pinnata var. lanoettula (Schum.) Hustedt in: A. Schmidt, Atlas Diat., pi. 297, figs. 51, 59-64. 1913. Valves lanceolate with more or less gibbous midportions and protracted, often somewhat unequal ends. Morphology and ornamentation of the frustule essentially similar to the nominate variety. 263 FRPINNVL TOT NO OF STATIONS 67 (6C973 14692 3 CH CH 1876 22N01946 0.0708 5 1 0.00219 ) 46521 46 520 CF CH 23N01945 200E1946 C. 00129 ) 0. 00062 1 (46517 (46905 CH CH 124A1946 JA1947 C.0C028 ) C.0C245 ) (46907 ( 1240 CH D 6 JL1947 10JN1964 C.0C049 ) 0.01381 ) 46522 1243 CH E 6 21AU1547 13JN1964 C. 00048 ) 0.01462 ) ( 1229 ( 1244 0 5 F 1 14MY1964 114N1964 C.0C211 ) C.CC110 ) ( 1264 1 1297 C 1 D 6 1CAU1964 14GC1964 0.00386 ) 0.01142 ) 1272 1301 C 1 E 4 10SE1964 130C1964 C.00410 ) 0.00442 ) ( 1278 ( 1302 0 6 E 5 18SE1964 130X1964 C.CC384 I 0. 00405 ) ( 1343 ( 1387 A 6 GS11 19AP1967 12MY1567 0.00347 ) 0.00792 1 1536 1356 E 2 GS20 24SE1967 13MY1967 0.00273 ) 0.00296 ) I 1385 I 1397 GS 9 GS21 10MY1967 13MY1967 C.0C471 ) C.0C131 ) ( 1398 1 1557 GS22 GS 4 GS15 GSl«i 14MV1967 30C1967 50C1967 60C1967 0.00304 ) 0.00374 ) 1554 1560 GS I GS 8 30C1967 40C1967 0.00356 ) 0.00472 ) ( 1555 ( 1565 GS 2 GS12 30C1967 50C1567 C. 00353 ) C.C4056 ) ( 1567 0.00159 ) 0.00117 1 1569 1572 GS17 GS20 50C1967 60C1967 0.00149 ) 0.00631 ) ( 1570 ( 1573 GS18 GS21 50C1967 60C1567 C.0C992 ) 1 1571 C.0C224 ) ( 1574 ( 1522 GS22 BH 1 60C1967 18SE1967 0.00288 ) 0.00729 ) 1546 1523 LU 1 P.A 1 20C1967 19SE1967 0.01501 1 0.00923 ) ( 1520 ( 1525 HO I FW 1 16SE1967 2CSE1967 0.0C943 ) C.C8355 ) ( 1526 ( 1529 MO 1 KW 1 20SE1967 20S61967 1.51903 ) 2.68617 ) 1527 1545 TR 1 *L 1 20SE1967 20C1967 8.15094 ) 0.21623 ) ( 1528 ( 1551 SB 1 ES 1 20SE1967 50C1967 60C1967 22MY1967 C. 69304 ) ( 1552 I 1426 SM I MS 2 60C1967 29MY1967 0.13206 ) 0.02100 ) 1550 1351 MR 1 Ml 2 50C1967 21AP1967 0.33453 ) C. 00310 ) ( 1553 ( 1417 SG 1 HO 2 C. 03672 ) ( 1350 ( 1402 BH 2 TR 2 19AP1967 6MY1967 0.05947 ) 0.12454 ) 1399 1400 PK 2 SB 2 5MY1967 6MY1967 0.01360 ) 0.00596 ) ( 1401 ( 1352 ¥0 2 KW 2 6MY1967 21AP1967 0.11759 ) C. 06013 ) ( 1354 ( 1407 GH 2 SM 2 25AP1967 14MY1567 0.00518 1 0.16719 ) 1404 1349 MC 2 CI 2 10MY1967 15AP1967 0.16514 ) 0.00359 1 ( 1405 ( 1420 ES 2 IH 2 12MY1967 23MY1967 0. 01290 ) C. 01511 ) ( 1423 WA 2 25MY1967 0.00856 ) Fragilaria spinosa Skv. Fragilaria mutabilis var. robusta Skvortzow and Meyer, Proc. Sungaree River Biol. Station, 1:7, pi. 1, fig. 8. 1928. Fragilaria spinosa Skvortzow, Phillipine J. Sci., 37:307, pi. 1, figs. 27; pi. 4, figs. 13, 19; pi. 5, figs. 54, 59. 1937. 13, Cells in girdle view elongate-rectangular, attached by the valve faces into band-shaped colonies. Membranous spines arising from the valve margin overlap the adjacent cell. Valves highly variable in outline, linear-ellip- tic to lanceolate, of ten more or less gibbous near the center. Specimens from Lake Michigan 25-46y long, 5-8y broad. Striae very coarse, chambered, not extending to the midline of the valve, 5-8 in lOu, without visible sub- structure. A submarginal spine is visible between each of the striae. Axial area broad, more or less lanceolate, without visible structure. No specially demarcated central area is present. Our specimens from Lake Michigan are uniformly narrower than those ori- ginally described by Skvortzow, length-width ratios being about 1/5-1/6 rather than 1/3.5-1/5 as in the Lake Baikal material. The structure and ornamentation of the frustule in our specimens is essentially identical to the specimens described by Skvortzow. This species is rare in our collections, and its recorded distribution indicates that it is a member of the periphyton community in relatively deep water . Coll: 1395. 88 Fvagilavia vaucheviae (Kutz.) Peters. Exilavia vauoheviae Kutzing, Linnaea, 8:560, pi. 15, fig. 38. 1833. Synedva vauoheviae (Kutz.) Kutzing, Bacill., p. 65, pi. 14(4), figs. 1, 2a, 3. 1844. Fvagilavia vauoheviae (Kutz.) Peterson, Bot. Not. 1938(1/3):167, figs, la-b. 1938. Cells in girdle view linear, united by the valve faces into band-shaped colonies of variable length. Valves elliptic-lanceolate to lanceolate with more or less protracted, usually rostrate, ends. Specimens from Lake Michi- gan 8-30u long, 3-4. 5p broad. Axial area narrow, central area unilateral, usually noticeably thickened on its margins. Striae distinct, parallel throughout the length of the valve, 14-16 in lOu. This entity is common in periphyton collections but only occasional specimens are noted in plankton collections from Lake Michigan. In general aspect it resembles F. intermedia but is distinguished from that species by its finer striae, less strongly silicified frustule, and the presence of a distinctly thickened border around the central area. 696 SWAUCHE TCT NO OF STATIONS 149 1 354(1 r.H 11MY1879 0.00466 1 ( 3541 r.H 1FE1881 0.00978 1 ( 469 1 O CH 0C1945 C.0C437 ) 146921 146915 CH CH 23N01945 20FE1946 0.00259 1 0.04552 » (46908 (46914 CH CH DE1945 19AP1946 0.02014 I 0.01602 ) (46917 (46924 CH CH 12JA1946 10MY1946 0.00305 ) C. 02540 ) (46923 146912 CH CH 22N01946 AP1947 0.01748 ) 0.01150 ) (46920 (46916 CH CH 200E1946 4MY1947 0.00246 I 0.01221 ) (46909 (469C6 CH CH MR1947 MY1947 C. 02277 ) C. 00796 ) (46919 146758 CH EV 5JN1947 5JN1937 0.49316 ) 8.18772 ) (46907 (46771 CH EV JL1947 11JN1937 0.00148 1 0.01189 I (46922 (46743 CH EV 21AU1947 20JN1937 C. 00630 1 C. 40250 ) (46745 (46757 EV EV 3JL1937 25JL1937 0.06270 ) 0.58736 ) (46770 (46747 EV EV 9JL1937 1AU1937 1.10925 1 C. 46043 1 (46764 (46763 EV EV 17JL1937 23AU1937 2.11120 ) 4.18019 ) ( 46765 (46750 EV EV 30AU1937 24SE1937 0.02789 1 0.29222 ) (46752 (46748 EV EV 15SE1937 130C1937 0.23944 ) 0.10675 1 (46760 (46767 EV EV 22SE1937 270C1937 C.1C340 ) 0.05029 I (46768 (46759 EV EV 16MR1938 19MY1938 0.C7350 1 0.02026 ) (46762 (46761 EV EV 18MR1938 27MY1938 0.24261 ) 0.00818 1 (46756 (46766 EV EV 27AP1938 14DE1938 C.CC336 ) 0.07921 ) ( 1236 ( 1243 C" E 1 6 8JN1964 13 JN 1964 0.00175 ) 0.00626 I ( 1237 ( 1244 C« F 2 1 8JN1964 11JN1964 0.00258 ) 0.01425 ) ( 1240 ( 1245 0 F 6 2 10JK1964 11JN1964 C.CC460 ) C. 02075 ) { 1246 ( 1259 F F 3 2 11JN1964 6JL1964 0.01793 ) 0.00310 ) ( 1252 ( 1264 C" C* 1 1 16JL1964 10AU1964 0.00279 1 0.02124 ) ( 1255 ( 1265 0 C" 5 2 15JL1964 10AU1964 C. 00513 ) C.0C894 I ( 1266 ( 1270 0 F 3 1 18AU1964 10AU1964 0.00351 ) 0.00272 ) ( 1268 ( 1274 E 0 2 1 15ALU964 17SE1964 0. 00547 1 C. 00938 ) ( 1269 ( 1275 E 0 3 2 15AU1964 17SE1964 0.00274 I 0.00645 I ( 1279 ( 1298 E E 1 1 16SE1964 120C1964 0.01178 ) 0.00539 ) ( 1284 ( 1299 E E 6 2 17SE1964 120C1964 0.00318 I 0.00314 ) ( 1285 ( 1301 F E 1 4 15SE1964 130C1964 C.C6406 ) C.0C442 ) ( 1304 I 1319 F E' 1 3 110C1964 7N01964 0.00247 ) 0.00262 ) ( 1316 ( 1320 0 E 6 4 9N01964 7N01964 C. 00378 ) 0.00207 ) ( 1318 ( 1341 E A 2 3 7N01964 19AP196 7 0.00380 ) C. 00108 ) ( 1343 ( 1432 A A 6 4 19AP1967 13JN1967 0.00208 ) 0.00255 ) ( 1374 ( 1451 E C 2 7 7MY1967 16JL1967 0.00299 ) 0.00197 ) ( 1410 ( 1454 A E 6 5 24MY1967 15JL1967 C. 00564 I C. 00200 ) ( 1508 C E_ 3 2SE1967 24SE1967 0.00400 ) 0.00818 I ( 1511 ( 1537 E E 2 3 1SE1967 24SE1S67 0.00307 ) 0.00431 1 ( 1534 ( 1538 A E 6 5 19SE1967 23SE1967 C.CC310 ) 0.C9943 ) ( 1540 I 1543 C E 5 5 40C1967 100C1967 C.0C496 ) 0.01437 ) ( 1541 ( 1379 E GS 2 3 110C1967 9KY1967 0.04790 ) 0. 00309 1 ( 1542 ( 1380 E GS 3 4 HOC 196 7 9MY1967 C. 03051 ) C. 00168 ) ( 1382 ( 1392 GS 6 GS16 10MY1967 12MY1967 0.01388 I 0.00308 ) ( 1384 ( 1394 GS 8 GS18 10MY1967 13MY1967 0.00185 ) 0.01032 ) ( 1387 ( 1395 GS11 C-S19 12MY1967 13MY1967 C. 08714 ) C.CC235 1 ( 1396 1 1554 GS20 GS 1 13MY1967 30C1967 0.00148 ) 0.02491 ) ( 1397 ( 1555 GS21 GS 2 13MY1967 3CC1567 0. 00196 ) 0.00706 ) ( 1398 ( 1556 GS22 GS 3 14MY1967 3QC1567 C. 00607 ) C.0C521 ) ( 1557 ( 1566 GS 4 GS14 30C1967 50C1967 0.0 2242 ) 0.00183 I ( 1562 ( 1568 GS10 GS16 50C1967 50C1967 0.00493 ) 0.0O144 ) ( 1565 ( 1569 C-S13 C-S17 50C1967 50C1967 C. 02535 1 C. 00149 1 ( 1570 1 1574 GS18 GS22 50C1967 60C1967 0.01983 1 0.07766 ) ( 1572 ( 1575 GS20 GS28 60C1967 60C1967 0.00270 ) 0.00387 ) ( 1573 ( 1544 C-S21 MJ 1 6dC1967 20C1967 0.00112 ) C.1C246 ) ( 1547 ( 1520 MS HO 1 1 20C1967 18SE1967 0.09581 ) 0.02829 i ( 1524 ( 1521 HI SH 1 1 20SE1967 18SE1967 0.08757 ) 0.02308 ) ( 1546 ( 1522 LU BH 1 1 20C1967 18SE1967 1.28045 I C.0C365 I ( 1523 ( 1528 RA _SB 1 1 19SE1967 20SE1967 0.00923 1 0.15882 ) ( 1526 ( 1529 MO KW 1 1 20SE1967 20SE1967 0.12516 ) 2.49430 ) ( 1527 ( 1530 TR FR 1 1 20SE1967 24SE1967 C. 30189 ) C. 33003 ) ( 1545 ( 1551 WL ES 1 1 20C1967 50C1967 21.73119 ) 0.00799 I ( 1548 ( 1552 CA SM 1 1 30C1967 6CC1967 0.01272 ) 0.01981 ) ( 1549 ( 1550 K0 PR 1 1 40C1967 5QC1967 C. 04111 ) C. 35931 ) ( 1553 ( 1417 SG HO 1 2 60C1967 22MY1967 0.03672 1 0.01495 ) ( 1428 ( 1350 MU BH 2 2 29KY1967 19AP1967 0.00603 ) 0.07929 ) ( 1427 ( 1425 LU RA 2 2 29MY1967 25MY1967 C. 03632 ) C.0C884 ) ( 1399 1- 135? PW KW 2 2 5HY1967 21AP1967 0.04081 ) 0.07731 ) ( 1402 ( 1354 TR GH 2 2 6MY1967 25AP1967 0.02707 ) 0.00345 ) ( 1400 ( 1429 SB 2 2 6MY1967 29MY1967 C. 02383 ) ( 1403 1 1407 CA SM 2 2 10MY1967 14MY1967 2.30156 ) 0.04777 ) ( 1404 ( 1349 MC CI 2 2 10KY1967 19AP1967 0.07622 ) 0.00359 ) ( 1405 ( 1406 ES GB 2 2 12MY1967 13MY1967 C. 03225 ) 0.02965 ) ( 1419 BU 2 23MY1967 0.01831 1 ( 1420 IH 2 23MY1967 0.03021 ) ( 89 Fvagilavia vauoheviae var. capitellata (Grun.) Patr. Synedra capitellata Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 40, fig. 26. 1881. Synedra vauoheviae var. capitellata (Grun.) Cleve, J. Linnean Soc. London, Bot., 20:314. 1883. Fvagilavia vauoheviae var. capitellata (Grun.) Patrick, Akad. Nat. Sci. Philadelphia Monogr. 13:121. 1966. Valves lanceolate with subcapitate to capitate ends. Specimens from Lake Michigan 15-50p long, 3-4u broad. Striae somewhat finer than in the nominate variety, 14-18 in 10y. Other features of morphology and ornamen- tation of the frustule essentially similar to the nominate variety. This entity is quite common in plankton collections from Lake Michigan. It is somewhat questionable that forms having a much expanded central area such as illustrated by Patrick (Patrick and Reimer 1966) belong to this taxon. 697 SYVAUCVC TOT NO OF STATIONS 39 (46917 (46909 CH CH 12JA1946 MR1947 0.00028 ) 0.00455 ) (46914 (46S1Z CH CH 19AP1946 AP1947 0.00107 ) 0.01150 ) (46923 (46916 CH CH 22NC1946 4MY1947 0. 00219 ) 0. 00170 ) (46758 (46747 EV EV 5JN1937 1AU1937 0.93431 ) 0.00495 1 (46743 (46763 EV EV 20JM937 23AU193 7 0.00856 ) 0.04058 ) (46745 (46752 EV EV 3J11937 15SE1937 0.04180 ) C.C6530 ) ( 1244 ( 1760 F F 1 3 11JN1964 6JL1964 0.0C219 ) 0.00573 1 ( 1258 I 1279 F E 1 1 6JL1964 16SE1964 0.00708 ) 0.00785 ) ( 1259 ( 1261 F E C GS 2 3 7 6 6JL1964 16SE1964 29AU1967 10MY1967 30C1967 50C1967 C.CC62C ) C. 00392 ) C. 00316 ) C. 00278 ) 0.00374 ) C.0C507 ) ( 1285 ( 1511 F E 1 2 15SE1964 1SE1967 0.04659 ) 0.00307 ) ( 1297 ( 1379 0 GS 6 3 140C1964 9KY1967 0.00190 ) 0.00619 ) ( 1510 1 1382 ( 1387 ( 1561 GS11 GS 9 12MY1967 40C1967 0.01188 ) 0.00587 I ( 1388 ( 1563 GS12 GS11 12MY1967 50C1967 0.00603 1 0.00234 ) I 1557 ( 1565 GS 4 GS13 ( 1567 ( 1526 GS15 M0 1 50C196 7 20SE1967 0.00159 ) 0.00569 ) ( 1574 ( 1549 GS22 MS 1 60C1967 40C1967 0.00863 ) 0.01370 ) ( 1546 ( 1552 LU SM 1 1 20C1967 60C1967 0.00500 ) C.CC660 ) C. 07622 ) ( 1550 MR 1 50C1967 0.02478 ) ( 1403 CA 2 10MY1967 0.32693 1 ( 1404 F0 2 10MY1967 Fvagilavia vauoheviae var. tvunoata (Grev.) Exilavia tvunoata Greville, in: Pritchard, Hist. Infus., p. 789. 1861. Synedva vauoheviae var. tvunoata (Grev.) Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 40, fig. 20. 1881. Valves linear with rostrate to subcapitate apices. Other features of the morphology and ornamentation of the frustule essentially similar to the nominate variety. This entity is relatively rare in our collections. Previous reports indicate that it finds its primary habitat in the periphyton. 699 SYVAICVT TOT HC CF STATIONS J__L26S„. 19AP1967 0.00217 I Species incevtae sedis Fvagilavia sp. #1. 266 FRSPECOA TOT UC OF STATIONS ( 1565 ( 1354 GS13 GH 2 50C1967 25AP1967 0.04563 I 0.00173 1 ( 1550 I 1404 MR 1 M0 2 50C1967 10FY1967 0.06195 I 0.03811 ) ( 1350 ( 1420 BH 2 IH 2 1SAP1S67 23MY1967 C. 01101 ) 0.10574 1 90 Fvagilaria sp. #7. 270 FRSPECOG TCT NO OF STATIONS 223 (60973 (46910 CH CH 1876 0C1945 0.37789 1 0.00983 1 3540 46521 CH CH 11MY1879 23N01945 0. 01864 1 C. 25222 ) ( 3541 (46908 CH CH 1FE1881 0E1945 C. 22498 ) C. 46324 ) (46917 ( 46924 CH __£H 12JA1546 10MY1946 0.02246 ) 0.02116 ) 46515 46523 CH CH 20FE1946 22N01946 0.11950 ) 0.07868 ) (46914 (46920 CH CH 19AP1S46 20DE1946 C.0C427 I 1.24165 ) (46905 (46916 CH f.H JA1947 4MY1947 0.C3922 ) 1.38939 ) 46SC9 465C6 CH CH MR1947 MY 1947 0.05464 ) 1.16478 ) (46912 (46919 CH CH AP1947 5JN1947 C. 24146 ) 0.01214 1 (46907 (46771 CH EV JL1947 11JN1937 1.18594 ) 0.01426 ) 46513 46743 CH EV 6AU1947 20JN1937 0.04184 ) 0.59947 I (46922 (46745 CH EV 21AU1947 3JL1937 C.5C403 1 0.04180 I (46770 (46747 EV EV 9JL1937 1AU1937 0.27433 1 0.01238 ) 46764 46763 EV EV 17JL1937 23AU1937 0.05641 ) 0.87256 ) (46757 (46765 EV EV 25JL1937 30AU1937 C. 01444 1 C.0C558 ) (46769 (46767 EV EV 7SE1937 2 70C1937 0.02171 I 0.00774 ) 46760 46749 EV FV 22SE1S37 12MR1938 C. 01477 I 0.02427 ) (46744 (46768 EV EV 60C1937 16MR1938 C.0C488 ) C.C5880 ) (46762 (46761 EV EV 18MR1938 27MY1938 0.08822 ) 0.00818 ) 46751 46766 EV FV 30KR1938 140E1938 0.02233 ) 0.03169 ) (46756 ( 1439 EV B 6 27AP1S38 5JN1964 C.0C5C4 ) C.C2198 ) ( 1440 ( 1251 B C 6 7 11JL1964 16JL1964 0.13266 ) 0.01159 1 1441 1252 e C" 6 1 24JL1964 16JL1964 0.03965 1 0.10042 ) ( 1250 ( 1253 C 6 2 10JL1964 16JL1964 C. 25899 ) C.0C913 ) ( 1254 1 1257 D E 2 3 15JL1964 14JL1964 0.01532 ) 0.04307 1 1255 1258 D F 5 1 15JL1964 6JL1964 0.09753 ) C. 33037 ) ( 1256 ( 1259 E F 2 2 14JL1964 6JL1964 0.01649 ) 0.39353 1 ( 1260 1 1444 F B 3 6 6JL1964 19SE1964 2.00546 ) 0.04244 ) 1442 1271 B C 6 7 2AU1964 22SE1964 1.43296 ) C. 00653 ) ( 1443 ( 1272 B C 6 1 16AU1964 10SE1564 1.79892 > C.3C374 ) ( 1273 1 1276 C D 2 3 10SE1964 18SE1964 0.26883 ) 0.04470 1 1274 1277 D n 1 4 17SE1964 18SE1964 0.50673 ) C.C8675 ) ( 1275 ( 1278 0 0 2 6 17SE1964 18SE1964 C.9C317 1 C.C2690 I ( 1279 ( 1282 E E 1 4 16SE1964 16SE1964 C. 07068 ) 0.58726 ) 1280 1283 E E 2 5 16SE1964 16SE1964 0.30635 ) C. 66201 ) ( 1281 ( 1284 E E 3 6 16SE1964 17SE1964 3.02162 ) 0.25736 1 ( 1285 I 1445 F B 1 6 15SE1964 140C1964 0.54743 ) 0.00978 ) 1286 1293 F C 2 2 15SE1964 15CC1964 0.18608 ) 0.01415 ) ( 1287 ( 1296 F 0 3 5 15SE1964 140C1964 0.59548 ) C. 00787 ) ( 1297 ( 1305 0 6 2 140C1964 110C1964 0.00762 ) 0.00518 ) 1300 1306 E F 2 ■3 130C1964 11GC1564 0.00716 I C. 01109 ) ( 1304 ( 1308 F C 1 7 110C1964 6N01964 C. 00988 ) 0.00912 ) ( 1310 1 1317 C« E 2 1 10NC1964 6N01964 0.00227 ) 0.00383 ) 1311 1318 0 E 1 2 8N01964 7N01964 C. 00774 ) C. 66587 ) ( 1312 ( 1319 D E 2 3 8NC1964 7N01964 C.0C310 ) 0.00524 1 ( 1320 1 1373 E F 4 1 7N01964 6N01964 0.01241 ) 0.32613 ) 1321 1324 E F 5 2 7N01964 6N01964 0.02554 1 0.09783 1 ( 1322 ( 1336 E C 6 3 7NG1964 27JA1967 C.C2000 ) 0.01348 ) ( 1337 ( 1340 C c 3 7 2KR1967 28MR1967 0.00882 ) 0.00291 1 1338 1341 C A 3 3 28MR1967 19AP1967 0.00264 1 0.00434 1 ( 1339 ( 1342 C A 5 4 28MR1967 19AP1967 C. 01247 ) C. 02707 ) 1 1343 ( 1346 A r. 6 7 19AP1967 21AP1967 0.00417 ) 0.00534 ) 1344 1347 C E 3 2 25AP1967 23AP1967 0.00331 ) C. 00813 ) ( 1345 ( 1348 C E 5 5 25AP1967 23AP1967 C. 00585 I C. 01508 ) ( 1368 1 1371 A c 3 3 4MY1967 4MY1967 0.01571 1 0.00693 ) 1369 1372 A C 4 5 4KY1S67 5MY1967 0.00373 ) 0.00709 ) ( 1370 ( 1373 A C 6 7 3MY1967 5MY1967 C. 03222 ) 0. 00285 ) ( 1374 ( 140B E A 2 3 7HY1967 23MY1967 0.02092 ) 0.02683 ) 1375 1409 E A 3 4 7MY1967 23MY1967 0.01203 ) 0.04463 ) ( 1376 ( 1410 E A 5 6 6MY1967 24MY1967 0.C3935 1 C. 07894 I ( 1411 ( 1414 c E 3 ? 31MY1967 28MY1967 0.01641 I 0.01679 ) 1412 1415 C E 5 3 31MY1967 28MY1967 0.02105 I C. 01124 ) ( 1413 ( 1416 C E 7 5 25MY1967 28MY1967 C. 01264 ) C. 01093 ) 1 1431 A C 3 5 12JN1S67 17JN1967 0.03605 ) 1432 A r-i?35 — C 4 7 13JN1967 13JN1967 0.28609 ) 0.01579 ) ( 1433 ( 1436 C E 3 2 17JM967 15JM967 0.C1938 ) 1 1134 0.00299 T 0.0C724 1 ( 1437 ( 1447 E A 3 4 15JN1967 11JL1967 0.00269 I 0.57307 ) 1438 1448 E . A 5 6 14JN1967 10JL1967 0.00726 1 0.00354 ) ( 1446 ( 1449 A C 3 3 1UL1967 16JL1967 C. 00978 1 C. 02675 ) 1 1450 ( 1505 c A 5 4 16JL1967 28AU1967 0.66648 ) 0.19582 ) 1452 1506 E A 2 6 - 14JL1967 29AU1967 C. 01064 ) 0.01569 ) ( 1454 ( 1508 E C 5 3 15J11967 2SE1967 C. 28006 1 C. 07194 1 ( 1509 ( 151? c E 5 3 2SE1967 1SE1967 1.15070 ) 0.13743 1 1510 1513 C E 7 5 29AU1967 31AU1967 0.04110 ) 0.10135 ) 1 1511 ( 1532 E A 2 3 1SE1967 18SE1967 C. 04604 I C.C8213 ) ( 1533 ( 1536 A E 4 2 19SE1967 24SE1967 0.13462 I 0.20178 1 1534 1537 A E 6 3 19SE1967 24SE1967 0.00310 I C. 06038 ) ( 1535 ( 1538 C E 7 5 20SE1967 23SE1967 0. 01288 ) C. 01657 ) ( 1539 ( 1542 c E 3 3 40C1967 110C1967 0.00503 ) 0.04068 ) 1540 1543 C E 5 5 40C1967 100C1967 0.01985 ) 0.04310 ) ( 1541 ( 1377 E GS 2 1 110C1967 9NY1967 C.C4257 ) C.0C792 ) ( 1379 L-L>8Z GS c-s 3 6 9MY1967 10MY1967 0.01547 ) 0.00555 ) 1380 1386 GS 4 GS10 9MY1967 12MY1967 0. 00841 ) 0.00287 ) ( 1381 ( 1387 GS 5 GS11 10MY1967 12MY1967 C. 01431 ) C.0C792 1 1 1389 1 1392 GS13 GS16 12MY1567 12HY1S67 0.00516 ) 0.00616 ) 1390 1393 G5K GS17 12HV1967 13MY1967 6.01174 ) C. 01096 ) ( 1391 ( 1394 "gsT5 — GS18 — nw?m,Y 13MY1967 C.0C344 ) ( 1398 ( 1556 GS22 GS 3 14MY1967 30C1967 0.01214 ) 0.07822 ) 1554 1557 GS GS 1 4 30C1967 30C1967 0.03202 ) 0.28774 ) ( 1555 ( 1558 GS GS 2 5 30C1967 40C1967 C. 06356 ) 0.20612 ) ( 1559 ( 156? GS 7 GS10 40C1967 50C1967 0.30776 ) 0.29358 ) 1560 1563 GS 8 GS11 40C1967 50C1967 C. 07084 1 0.00935 ) ( 1561 ( 1564 GS 9 GS12 40C1567 50C1967 C. 08804 ) 0.15965 ) ( 1566 ( 1569 GS14 GS17 5QC1967 50C1967 0.00734 ) 0.08770 ) 1567 1570 GS15 GS18 50C1967 50C1967 0.04922 ) 0.02975 ) (' 1568 ( 1571 C-S 16 GS19 50C1967 60C1967 C. 03896 ) C.0C176 ) ( 1573 1 1546 GS21 LU 1 60C1967 20C1967 0.01008 ) 0.01501 ) 1574 1521 GS22 SH 1 60C1967 18SE1967 0.02301 1 0.01731 ) ( 1547 ( 1526 MS CO 1 1 20C1967 20SE1967 0.54291 ) C. 01707 1 ( 1528 ( 1549 SB MO 1 I' 20SE1967 40C1967 0.05775 ) 0.12334 ) 1529 1551 ES 1 1 20SE1967 50C1967 0.02398 ) 0.45531 ) ( 1548 ( 1550 CA CR 1 1 30C1967 50C1567 1.60285 ) 0.01239 ) 1 1426 . J_JJi9_ MS PW 2 2 29MY1967 5MY1967 0.02100 ) 0.29244 ! 1417 1401 HO MO 2 2 22MY1967 6MY1967 0.00748 1 0.04704 ) ( 1425 ( 1402 RA TR 2 2 25MY1967 6MY1967 C. 01768 ) C. 02166 ) ( 1400 ( 1403 SB r.A 2 ? 6MY1967 10KY1967 0.37527 1 1.21616 ) 1352 1404 KVi MC 2 2 21AP1967 10MY1967 0.21474 ) 0.06352 ) ( 1354 ( 1405 GH ES 2 2 25AP1967 12MY1S67 0.00690 ) C.C1290 ) ( 1407 ( 1470 SM IH 2 ? 14HY1967 23KY1967_._ 0.01194 ) 0.09063 ) 1349 1421 CI CH 2 2 19AP1967 23MY1967 0.02155 ) 0.08675 ) ( 1419 ( 1422 BU C-A 2 2 23MY1967 23MY1967 0.07323 ) C. 01533 ) ( 1424 KN 2 25MY1967 0.06661 1 Fvagilca>ia sp. #8 (F. ovotonensis erstlingzellen ?). 271 FRSPECOH TCT NO OF STATIONS 28 (60973 (46770 CH EV 18 76 9JL1937 0.30704 1 0.02385 ) 146913 (46764 CH EV 6AU1947 17JL1937 C. 01046 ) 0.04835 ) (46771 (46757 EV EV 11JN1537 25JL1937 C.CC238 ) 0.00481 ) (46747 (46767 EV EV 1AU1937 27QC1937 _ 0.00743 1 0.0C774 1 (46750 (46761 EV EV 24SE1937 27KY1938 C. 00471 ) 0.00273 1 (46744 (46766 EV EV 60C1937 14DE1938 C.0C488 1 0.03165 ) ( 1260 ( 1304 F 3 F 1 6JL1964 line 1964 0.OC191 ) 0.22474 ) ( 1443 ( 1305 B F 6 2 16AU1964 U0C1964 C. 00198 1 Ci02243 ) ( 1270 ( 1306 F 1 F 3 10AU1964 110C1964 C.CC817 ) C. 01109 ) ( 1315 1 13?3 D 5 F 1 9N01964 6NQ1964 0.00455 ) 0.24390 > ( 1316 ( 1324 C F 6 2 9N01964 6N01964 C. 01133 ) C. 19332 ) ( 1318 ( 1325 E 2 F 3 7N01964 6N01964 C.CC380 ) 0.23678 ) • 1451 ( 1423 C 7 UA 2 16JL1967 25MY1967 0.03937 ) 0.00428 ) ( 1383 ( GS 7 10MY1967 0.00267 ) I 1387 GS11 12MY1967 C.0C396 ) 91 Fragilaria sp. #9. 272 FRSPECOI (46915 f.H TCT NO OF STATIONS 15 20FE1946 0.01138 ) (46916 CH 4MY1547 0.00271 1 (46919 CH 5JN1947 C.0C455 ) (46743 14675? EV FV 20JN1937 15SE1937 0.00856 ) 0.02177 ) (46757 ( 1258 EV F 1 25JL1937 6JL1964 0.00481 ) 0.03540 ) (46763 ( 1259 EV F 2 23AU1937 6JU564 C. 02029 ) C. 02479 ) ( 1260 ( 17R5 F 3 F 1 6JL1964 15SE1964 0.00573 ) C. 09900 ) ( 1272 ( 1452 E 1 2 10SE1964 14JL1967 0.00410 ) 0.00639 I ( 1284 ( 1558 E 6 6S 5 17SE1964 40C1967 C. 00635 1 C.CC793 ) Fragilaria sp. #10. 773 FPSPFr.n.i TtiT wn nF stations (46924 CH 10MY1946 0.00071 ) (46S16 CH 4MY1547 0.00136 ) (46919 CH 5JN1947 C.0C910 ) (46922 ( 1259 CH F 7 21AU1947 6JL1964 0.00048 ) C.C0930 ) (46743 ( 1285 EV F 1 20JN1937 15SE1964 0.00426 I 0.01165 ) (46757 1 1403 EV CA 2 25JL1937 10MY1967 C.0C481 ) C. 49693 ) 10HY1967 0.02541 ) Fragilaria sp. #11. 274 FRSPECOK TCT MO OF STATIONS (46909 CH ( 1530 FR 1 CR1947 0.0C455 1 24SE1967 n.olQQC ) (46916 J Fragilaria sp. #15. ._2 I5_£»SPECCC Ul ( 1406 CM 2 NC CF STAT1CNS 13PY1967 0.CC27C ) ( Fragilaria "orotonensis v. tenuissima. " 16JU561 C.CC382 ) 249 FRCROTVA TCT NO OF STATIONS 136 (60973 I 3507 CH r.H 1876 i9FEiani 0.56684 I 0.06792 1 ( 3540 (46510 CH CH 11MY1875 0C1945 0.04659 1 0. 10159 ) ( 3541 (46921 CH CH 1FE1881 23N01945 0.02935 1 C. 02457 ) (46908 (46914 CH CH 0E1945 19AP1946 0.02014 I 0.00747 1 (46517 [46524 CH CH 12JA1946 10MY1946 0.04491 1 0.22927 1 (46915 (46920 CH CH 20FE1946 20DE1946 C.1C812 ) C. 24032 ) (46905 ■ 4691 A CH .IA1947 4MV194 7 0.15933 1 n. 07613 1 (46909 I465C6 CH CH MR1947 HY1947 0.01821 1 C. 01062 1 (46912 (46907 CH CH AP1947 JL1947 C. 52892 ) C. 19231 ) 146913 (46771 CH EV 6AU1947 11JN1937 0.09413 ) 0.12125 1 (46922 (46743 CH EV 21AU1947 20JN1937 0.02423 I 0.16271 ) (46758 (46745 EV EV 5JN1937 3J1.1937 C. 09628 ) C. 12539 ) (46770 - (46747 EV EV 9JL1937 1AU1937 0.30415 ) 0.34656 ) (46764 (46763 EV EV 17JL1937 23AU1937 C. 37067 1 0. 52760 ) (46757 (46765 EV EV 25JL1937 30AU1937 C. 13480 ) 0.10039 ) (46769 (46750 EV EV 7SE1937 24SE1937 0.04342 ) 0.41476 ) (46752 (46744 EV EV 15SE1937 60C1937 0.08707 1 0.88763 ) (46760 (46748 EV EV 22SE1937 130C1937 C. 43331 ) C. 08540 ) (46767 (46762 EV EV 270C1937 18MR1938 0.36362 1 0.77195 ) (46749 (46751 EV EV 12MR1938 30MR1938 0.32771 1 C. 04466 ) (46768 (46772 EV EV 16MR1938 18AP1938 C.1C290 ) 0.C4968 ) (46756 (46766 EV EV 27AP1938 14DE1938 0.03022 ) 0.22180 1 (46759 ( 1377 EV GS 1 19MY1938 5MY1967 C.C5402 ) 0.01187 ) (46761 ( 1378 EV GS 2 27MY1938 9MY1967 0.05451 ) 0.00841 ) ( 1379 ( 138? GS GS 3 6 9MY1967 10MY1967 0.13927 ) 0.01665 1 ( 1380 1 1383 GS GS 4 7 9MY1967 10MY1967 0.17152 ) 0.08287 I ( 1381 ( 1384 GS GS 5 8 10MY1967 10PY1967 C. 09302 I C. 02033 ) ( 1385 ( 1388 GS 9 GS12 10MY1967 12MY1967 0.01413 ) 0.04223 I ( 1386 ( 1390 GS10 GS14 12MY1967 12MY1967 0.03160 ) 0.05285 ) ( 1387 ( 1391 GS11 GS15 12MY196J 12MY1567 C.15447 ) C. 02394 ) ( 1392 I 1395 GS16 GS19 12MY1967 13MY1967 0.18183 I 0.08690 I ( 1393 ( 1396 GS17 GS20 13MY1S67 13MY1967 0.05479 ) 0.01258 ) ( 1394 ( 1397 CS18 GS21 13MY1567 13MY1967 C. 12729 ) C.0C392 ) ( 1398 I 1556 GS22 GS 3 14MY1967 30C1967 0.15788 ) 0.18772 ) ( 1554 ( 1557 GS GS 1 4 30C1S67 30C1967 C. 99623 ) C. 97160 J ( 1555 ( 1558 GS C-S 2 5 30C1967 40C1567 C. 06003 ) C. 73728 ) ( 1559 ( 1567 GS 7 GS10 40C1967 50C1967 0.41617 ) 0.26644 I ( 1560 ( 1563 GS 8 GS11 40C1967 50C1967 C. 17003 ) 0.14497 ) ( 1561 ( 1564 C-S 9 GS12 40C1967 50C1967 50C1967 60C1967 C. 21130 ) 0.14484 ) { 1566 1 1569 GS14 GSI7 50C1967 50C196 7 0.05687 ) 0.27054 I ( 1567 ( 1570 GS15 GS18 50C1967 50C1967 0.12384 ) 0.69417 1 I 1568 ( 1571 GS16 C-S 19 C. 15584 1 C. 03278 ) ( 1572 ( 1575 GS20 GS78 . 60C1967 60C1967 0.03064 ) 0.02709 ) ( 1573 I 1544 GS21 MU 1 60C1967 20C1967 0.14223 ) 0.04766 I ( 1574 ( 1547 GS22 PS 1 60C1967 2CC1967 C. 12944 ) C. 41517 1 ( 1524 1 1571 HI SH 1 J 20SE1967 18SE1967 0.94133 ) 2.21555 ) ( 1546 ( 1522 LU BH 1 1 20C1967 18SE1967 C. 04001 I 0.00912 1 ( 1520 ( 1523 HC RA 1 1 18SE1967 19SE1567 C. 39606 ) 2.06642 ) ( 1525 ( 1578 PH SR 1 1 20SE1967 7CSE1967 0.79376 ) 0.46703 ) ( 1526 ( 1529 MO KM 1 1 20SE1967 20SE1967 0.32429 I 0.34776 1 ( 1527 I 1530 TR FR 1 1 20SE1567 24SE1567 C.C7547 1 C. 15001 ) ( 1531 1 1549 GH NO 1 1 25SE1967 4DC1567 0.02536 ) 0.10963 ) ( 1545 ( 1551 WL ES 1 I 20C1967 50C1967 0.14866 ) 0.45531 ) ( 1548 ( 1550 CA PR 1 1 30C1967 50C1967 C. 11449 ) C. 06195 ) ( 1553 1 1351 SG MI 1 7 60C1967 21AP1967 0.13220 I 0.01552 ) ( 1428 ( 1427 MU LU 2 2 29MY1967 29MY1967 0.03917 ) 0.01211 I ( 1426 ( 1417 PS 2 2 29MY1967 22MY1967 0.07349 ) 0. 05982 ) ( 1418 _t- 140J SH MCI 2 7 22MY1967 6MY1967 0.31104 ) 0.07056 ) ( 1425 1 1402 RA TR 2 ? 25MY1967 6MY1967 0.45973 ( 0.18952 1 ( 1399 ( 1400 FW se 2 2 5MY1967 6MY1967 C. 06121 ) 0. 05361 ) ( 1352 KM 2 7 21AP1967 79KY1967 0.30064 I 0.06370 1 ( 1353 I 1403 FR CA 2 23AP1967 10MY1967 0.02110 I 0.06539 1 ( 13 54 ( 1404 GH pc 2 2 25AP1967 10P.Y1967 C. 01036 ) C. 03811 ) ( 1405 ES GR 2 7 12MY1967 13MY1S67 0.14190 ) 0.02157 ) ( 1407 ( 1419 SM BU 2 2 14MY1967 23MY1967 0.14331 ) C. 12816 ) ( 1349 ( 1421 CI CH 2 2 19AP1967 23MY1967 C. 06825 ) C.C8675 1 ( 1422 { 1430 GA MC 2 ? 23MY1967 12JN1^67 0.10218 } 0.02467 ) T™T423 ( MA 2 25MY1967 0.50529 > ( 1424 KN 2 25MY1967 C. 37303 ) Genus Frustulia Rabh. (nom. cons, non Agardh 1824) Rabenhorst, Stissw.-Diat. , p. 50. 1853. Most members of the genus Frustulia find their primary habitat in benthic communities. The occasional specimens that are noted .in plankton collections from Lake Michigan are probably derived from such habitats. 92 Fvustulia vhomboides (Ehr.) De Toni Navioula vhomboides Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:419, pi. 3(1), fig. 15. 1843. Fvustulia vhomboides (Ehr.) De Toni, Syll. Alg. Vol. 2, Sect. 1, p. 277. 1891. 216__ FURHCKBO TOT i.u OF STATIONS [46906 CH MY1947 0.00066 ) (46907 CH JL1947 0.00049 ) 1 Fvustulia vhomboides var. amphipleuvoides (Grun.) Cleve Navioula vhomboides var. amphipleuvoides Grunow in: Cleve and Grunow, K. Svenska Vet. -Akad. Handl., Ny Foljd, 17(2) :47, pi. 3, fig. 59. 1880. Fvustulia vhomboides var. amphipleuvoides (Grun.) Cleve, K. Svenska Vet.- A.kad. Handl., Ny Foljd, 26 (2): 123. 1894. ?77 FIIRHnKVA TCT NO CF STATIONS 10. 160973 CH ie76 0.02362 ) < 3541 CH 1FE1881 C.00S78 ) (46924 CH 10MY1946 0.00071 ) (46923 CH 22N01946 0.00437 ) (46920 CH 200E1946 C.0C031 ) 146919 CH 5JN1947 0.10925 ) ( 1388 GS12 12HY1967 0.00603 I 1 1569 CS17 50C1967 C.0C149 ) I 1550 MR 1 5CC1967 0.01239 ) ( Fvustulia vhomboides var. saxonioa (Rabh.) De Toni Fvustulia saxonioa Rabenhorst, Siissw.-Diat. , p. 50, pi. 7, fig. 1. 1853. Fvustulia vhomboides var. saxonioa (Rabh.) De Toni, Syll. Alg., Vol. 2, Sect. 1, p. 277. 1891. 278 FURHOPVS TCT NC CF STATIONS 2 ( 3540 CH 11HY1879 6^00466 ) Fvustulia vulgaris (Thw.) De Toni Sohizonema vulgave Thwaites, Annals Mag. Nat. Hist., Ser. 2, 1:170, pi. 12(H), fig. 1-5. 1848. Fvustulia vulgaris (Thw.) De Toni, Syll. Alg., Vol. 2, Sect. 1, p. 280. 1891. 279 FUVULGAR TCT NC CF STAT1CNS (46748 EV 13CC1937 0.02135 ) ( 1285 F 1 15SE1964 0.00582 ) ( 1341 A 3 19AP1967 C.IC325T -. (.- JA3J. A_3 .LZJKlShI _ (46763 EV __19AP1967 O.00108 ) ( 1397 GS21 3CC1967 C. 66521 ) ( 1565 GS13 19AP1967 C. 00441 ) ( 14C4 ¥Z 2 23AU1937 C.C4C58 ) 13MY1967 C.CC065 ) 5GC1967 C.C1521 ) 10MY1967 C.C127C I Gomphonema graoile var. cymbelloides Grun. Gomphonema graoile var. cymbelloides Grunow ex Cleve> K. Svenska Vet. Akad. Handl., Ny Foljd, 26(2): 182. 1894. 293 GCGRAC.VA TCI NO. OF .STATIONS 1. ( 1559 GS 7 40C1967 0.00350 I 1 Gomphonema grovei M. Schm. Gomphonema grovei M. Schmidt in; A. Schmidt, Atlas. Diat., pi. 214, figs. 13-18. 1899. 294 GCGRC.VEJ..TP.T . \C...C.F STATIONS C.0C117 ) C.C0C90 ) Gomphonema intricatvm Kiitz. Gomphonema intricatvm Ktttzing, Bacill., p. 295 GCINTPIC TCT NO CF STATIONS 87, pi. 9, fig. 4. 1844. ( 3541 CH 1FE1881 0.01956 I (46921 CH 23N01945 C. 00129 ) (46917 CH 12JA1946 C.CCC28 ) CH CH 22N01946 4NY1947 0.00219 ) 0. 00068 ) (46920 (46«C6 CH CH 20DE1946 MY1947 C. 00092 ) (469C9 (469C7 CK Ch MR1947 ji.1947 C.0C455 1 (46916 0.00133 ) C.CC049 ) (46922 CH 21AU1947 C. 00145 ) (4675B EV 5JN1937 0.00357 1 (46764 EV 17JL1937 C.OC806 ) (46757 EV 25JL1937 0.01444 ) (46747 EV 1AU1937 C. 00743 I (46763 EV 23AU1937 C. 28409 I (4675? EV 15SE1937 0.17414 ) (46760 EV 22SE1937 0.00492 ) (46750 EV 24SE1937 C.0C471 ) (46748 EV 13CC1937 0.17079 ) (46767 EV 270C1937 C. 01160 ) (46768 EV 16MR1938 C. 22049 ) (46762 . .EV-. 18PR1938 0.02206 I (46751 EV 30MR1938 C. 01117 ) (46761 EV 27MY1938 C.CC273 1 ( 1244 F 1 11JN1964 O.CCUO ) ( 1258 F 1 6JL1964 0.01416 ) ( 12 59 F 2 6JL1964 C.CC310 ) < 1279 El 16SE1S64 0.00393 1 ( 1284 E 6 17SE1964 C. 01271 ) ( 1285 F 1 15SE1964 C.C8736 ) ( 1390 GS14 12MY1967 0.00587 1 ( 1391 GS15 12CY1967 C. 00958 ) ( 1392 GS16 12MY1967 C.CC616 ) 1 1397 GS21 13MY1967 C. 00065 ) ( 1563 GSll 50C1967 C. 00234 ) I 1566 GS14 50C1967 C.CC183 ) ( 1567 GS15 5CC1967 0.00476 1 ( 1571 GS19 60C1967 C. 00059 ) ( 1572 GS20 60C1967 C.0C090 ) ( 1573 GS21 6CC1967 0.00112 ) ( 1574 GS22 60C1967 0.04315 ) ( 1522 Bh 1 1ESE1S67 C.C0182 ) ( 1523 P.A 1 1SSE1967 0.06458 ) ( 1526 MO 1 20SE1967 0.00569 ) ( 1530 FR 1 24SE1967 C. 01000 ) ( 1551 ES..L 5CC1967 C. 00799 ) ( 1552 SN 1 6CC1967 C. 02641 ) ( 1550 fR 1 5CC1967 C.C6195 ) ( 1553 SG 1 60C1967 0.03672 ) ( 1426 MS 2 29MY1967 0.03150 ) ( 1350 BH 2 19AP1967 C. 01762 ) ( 1402 TR 2 6^Y1967 0.01083 I ( 1353 FR 2 23AP1967 C.C1C55 1 ( 1403 CA 2 10MY1967 C. 06539 ) Gomphonema intricatvm var. diohotomum (Kiitz.) Grun. Gomphonema diohotomum KUtzing, Linnaea, 8:569, pi. 15, fig. 48. 1833. Gomphonema intricatvm var. diohotomum (Kiitz.) Grunow ini Van Heurck, Syn. Diat. Belgique, pi. 24, figs. 30-31. 1880. 296 GCINTRVO TCI NO OF STAT1CNS (46752 ( 1522 EV BH 1 15SE1937 18SE1967 0.04354 ) 0.00729 1 ( 1388 I 1526 GS12 MO 1 12MY1967 20SE1967 C. 00603 ) 0.00569 ) ( 1574 ( 1552 GS22 _S«_JL 6CC1967 C. 01726 ) _ 6CC1967 C. 01981 ) 10MY1967 C.C127C ) Gomphonema intricatvm var. pvmila Grun. Gomphonema intricatvm var. pvmila Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 24, figs. 35-36. 1880. 96 257 GCINTRVP TCT NC QF STATIONS 47 i 3540 CH 11MY1879 0.03727 1 146906 CH NY1947 C. 00066 ) (46758 EV 5JN1537 C. 01783 ) (46770 EV EV 9JL1937 1AU1937 0.00596 ) 0.01238 ) (46764 (46763 EV EV 17JL1937 23AU1937 0.0161.2 ) (46757 EV 25JL1937 C.0C963 ) (46747 0. 28409 ) (46769 EV 7SE1937 C.C2171 ) 146752 EV 15SE1937 0.02177 ) (46760 EV 22SE1937 0. 0049 2 ) (46748 EV 13CC1937 C. 02135 ) (46767 EV 270C1937 0.00774 1 (46768 EV 16MR1938 C. 01470 ) ( 1240 D 6 10JN1964 C.0C153 ) 1 1243 E 6 13JN1964 0.0C626 I ( 1268 E 2 15AU1964 0.00274 ) ( 1270 F 1 10A01964 C.0C817 ) ( 1285 F 1 15SE1964 0.01165 ) ( 1297 0 6 140C1964 COO 190 I ( 1302 E 5 130C1964 C.0C4O5 ) ( 1324 F 2 6N01964 0.00466 ) ( 1341 A 3 19AP1967 C.C0108 1 ( 1538 E 5 23SE1967 C.CC552 ) ( 1386 GS10 12MY1567 0.0C287 ) ( 1387 GS11 UPY1967 0.00792 ) < 1389 GS13 12MY1967 C.CC258 ) < 1554 GS 1 3CC1967 0.00356 ) ( 1555 GS 2 30C1967 C. 00353 1 ( 1565 CS13 50C1967 C. 02535 ) ( 1571 GS19 60C1967 C. 00059 ) ( 1574 GS22 6CC1967 C. 02301 ) ( 1544 fU 1 20C1S61 C.CC238 ) ( 1526 MO 1 SM 1 2CSE1967 60C1967 0.01138 ) ( 1528 SB 1 20SE1967 0. 01444 ) C. 11151 ) ( 1530 ( 1553 FR 1 SG 1 24SE1967 60 C 196 7 C.C2000 ) ( 1552 0.00660 ) < 1550 KR 1 5CC1967 C. 02203 1 ( 1428 NU 2 29MY1967 0.00603 ) ( 1417 HO 2 22MY1967 0.01122 ) ( 1350 BH 2 19AP1967 C.C1101 ) ( 1399 PH 2 5PY1967 0.00680 ) I 14C2 TP 2 6KY1967 0.00541 1 ( 1403 CA 2 1CMY1967 C.C1308 ) ( 1405 ES 2 12KY1967 0.03225 ) 1 1407 SM 2 14MY1967 0.00597 ) ( Gomphonema laneeolatum Ehr. Gomphonema laneeolatum Ehrenberg, Abh. 2(1)., fig. 37. 1845. Akad. Wiss. Berlin, 1843:32, pi. (46764 EV 17JL1937 C.0C8O6 ) (46763 EV 23AU1S37 C.04C5S ) (46748 EV 13CC1937 C.C2135 ) (46767 ( 1561 EV GS 9 HO 2 TR 2 270C1937 40C1967 22MY1967 6PY1967 0.00387 ) 0.01761 1 0.00374 ) 0.00541 1 (46768 ( 1575 ( 1418 ( EV GS28 SH 2 16NR1938 6CC1967 0.01470 ) C. 00129 I ( 1388 ( 1550 GS12 PR 1 12MY1967 5CJC1967 C.CC603 ) C.C3717 ) ( 1417 ( 1402 22MY1967 0.01555 ) ( 1350 BH 2 19AP1967 C. 01322 ) Gomphonema laneeolatum var. insignis (Greg.) Cleve Gomphonema insigne Gregory, Micr. J., 4:12, pi. 1, fig. 39. 1856. Gomphonema laneeolatum var. insignis (Greg.) Cleve, K. Svenska Vet.- Akad. Handl., Ny Foljd, 26 (2): 183. 1894. 299 GCLANCil._t£T_NE.CF..STAIIC_NS 1 (46768 _E_V__ _16KR.LS.38 0 . C4410_) ( Gomphonema longieeps Ehr. Gomphonema long-beeps Ehrenberg, Mikrog., pi. 4(3), fig. 27. 1854. 3Q.0 GE.LQJ_JUJ^.LCJ_.NJL.C.F_SXUJCJNJL 1 ( 46758. EV. 5J.NL.9_37 ___0_C357__. ( Gomphonema manubrium Fricke Gomphonema manubrium Fricke -in: A. Schmidt, Atlas Diat., pi. 248, fig. 12. 1904. Coll: 1549a. Gomphonema olivaeeoid.es Hust. Gomphonema olivaeeoides Hustedt, Arch. Hydrobiol., 43(3/4) :397, pi. 37, figs. 9-12. 1950. 302 G-C-EfDE IfT NO OF STATICNS ( 46754 . EV 5JN1937 0.03209 ) (46771 EV 11JM937 C.CC238 ) (46 743 EV 20JM937 (46764 14*75? EV FV 17JL1937 15SF1937 0.00806 1 0.04354 ) (46757 (46748 EV EV 25JL1937 130C1937 0.00963 ) C. 06405 1 (46763 (46749 EV EV 23AU1937 12HP193E C. 02029 1 C. 01214 1 (46762 ( 1384 EV GS 8 18MR1938 10MY1967 0.06617 1 0.00185 ) (46756 ( 1530 EV FR 1 27AP1938 24SE1967 0.00168 ) C. 01000 ) ( 1258 ( 1549 f 1 PC. 1 6JL1964 40C1967 C.C0472 ) C.C137C ) ( 1552 SM 1 60C1967 0.00660 ) ( 1550 MR 1 50C1967 0.03717 ) 1 Gomphonema olivaeeum (Lyngb.) Kutz. Eehinella olivaeea Lyngbye, Tent. Hydrophyt. Danicae, p. 209, pi. 70, fig. c. 1819. Gomphonema olivaeeum (Lyngb.) Kutzing, Bacill., p. 85, pi. 7, figs. 13, 15. 1844. 97 303 GOOLIVAC ICT NC CF STATICNS (46921 146905 CH CH 23N01945 JA1947 0.OC194 ) 0.00123 ) 46924 46916 CH CH 10MY1946 4MY1947 0.00282 1 0.00170 ) 46920 46919 CH CH 200E1946 5JN1947 C.CCC62 ) 0.00303 ) (46922 (46770 CH EV 21AU1947 9JL1937 0.00048 ) 0.00596 ) 46758 46764 EV EV 5JN1937 17JL1937 C. 39940 ) 0.00806 ) 46743 46757 EV EV 20JN1937 25JL1937 C.CC856 ) 0.01926 ) (46747 (46752 EV EV 1AU1937 15SE1937 0.01238 1 0.02177 ) 46763 46760 EV EV 23AU1937 22SE1937 0.12175 ) C. 00492 ) 46765 46748 EV EV 30AU1937 130C1937 C.CC558 ) C. 02135 ) (46767 (46751 EV EV 27CC1937 30WU936 0.0C387 ) 0.02233 ) 46768 1227 EV C 2 16MR1938 13MY1964 0.01470 ) 0.00110 ) 46762 1236 EV C 1 18PR1938 8JN1964 C. 02206 ) C.0C175 ) ( 1240 ( 1279 D E 6 1 10JN1964 16SE1964 O.C0307 1 0.00393 ) 12 52 1282 C E 1 4 16JL1964 16SE1964 C. 00279 1 0. 01108 ) 1273 1285 C" F 2 1 10SE1964 15SE1964 C. 00538 ) C. 00582 ) ( 1341 ( 1368 A . A 3 3 19AP1967 4MY1967 0.0C868 ) 0.00314 ) 1342 1369 A A 4 4 19AP1967 4MY1967 0.00180 ) 0.00373 ) 1346 1372 C C 7 5 21AP1967 5HY1961 C.0C4O1 ) C.CC355 ) ( 1375 ( 1451 E 3 7 . 7MY1967 16JL1967 0.00241 1 0.0C197 ) 1416 1452 E E 5 2 28MY1967 14JL1967 0.00219 1 0.00426 ) 1432 1453 A E 4 3 13JN1967 15JL1967 C. 00255 ) C.CC253 ) ( 1532 ( 1387 A 3 GS11 18SE1967 12MY1967 0.00329 ) 0.00396 1 1538 1389 E 5 GS13 23SE1967 12MY1967 0.00552 1 0.00258 ) 1381 1396 GS 5 GS20 10MY1967 13MY1967 C.0C239 ) C.CC222 ) ( 1397 ( 1567 GS21 J3S15 GS21 MI 1 13MY1967 50C1967 6CC1S67 2CSE1967 C. 00065 ) 0.00318 ) 1559 1569 GS 7 GS17 4CC1967 50C1967 C.OO350 ) C. 00297 ) 1563 1571 GS11 CS19 50C1967 60C1967 60C1967 18SE1967 C.0C234 ) C. 00059 ) ( 1573 1 1524- 0.00224 ) 0.02189 ) 1574 1546 GS22 LU 1 60C1967 20C1967 0.00863 ) 0.02501 ) 1575 1521 GS28 SH 1 C.CC129 ) C.0C577 ) ( 1522 ( 1551 BH ES 1 1 18SE1967 50C1967 0.01641 ) 0.00799 1 1545 155C ML MR 1 1 20C1S67 50C1967 C. 02703 ) C. 24780 1 1549 1553 PQ SG 1 1 4CC1967 6CC1967 C.C1370 ) C.CC734 1 ( 1428 ( 1427 MU LU 2 2 29MY1967 29MY1967 0.00904 ) 0.04843 ) 1426 1417 MS HO 2 2 29MY1967 22MY1967 0.04199 ) 0.04112 ) 1351 1350 M BH 2 2 21AP1967 19AP1967 C.0C621 1 C. 49338 ) ( 1401 L 1354 MO GH 2 2 6MY1967 25AP1967 0.05292 ) 0.01553 1 1402 1429 TR WL 2 ? 6MY1967 29MY1967 C. 01083 I C.C2123 1 1400 1403 SB CA 2 2 6MY1967 10MY1967 C. 06552 1 C. 05231 ) ( 1407 1 1473 SM WA 2 Z 14MY1967 25fY1967 0.00597 ) 0.01285 ) 1349 CI 2 19AP1967 0.00359 ) 1406 GB 2 13MY1967 C.C2696 ) Gomphonema olivaoeum var. oaloarea Cleve Gomphonema olivaoeum var. oaloarea Cleve, Forhandl., 24:231, pi. 4, fig. 7. 1868. Ofv. K. Svenska Vet.-Akad. 404 GCCLIVVC TCT NO OF STATIONS 5JN1937 0.01426 ) (46757 25JL1937 0.01444 ) C.0C248 I (46763 EV ( 1576 MO 1 23AU1937 2CSE1967 0.02029 ) 0.01138 ) ( 1285 _ ( 1527 F 1 TR 1 15SE1964 20SE1967 0.00582 ) 0.00629 1 ( 1342 (15 29 A 4 KW 1 19AP1967 20SE1967 C. 00180 ) 0.04797 ) Gomphonema parvulum (Kutz.) Kutz. Sphenella ? parvula Kutzing, Bacill., p. 83, pi. 30, fig. 63, Gomphonema parvulum (Kutz.) Kutzing, Sp. Alg., p. 65. 1849. 1844. 305 KnPARVVM TOT NC CF STATICNS 18 146909 CH MR1947 0.00455 ) 46758 EV 5JN1937 0.00357 ) 46768 EV E 1 GS19 16MR1S38 16SE1964 60C1967 ( 1258 1 1541. F 1 E 2 6JL1964 110C1967 0.00236 ) 0.00532 ) 1265 1387 C 2 GS11 10AU1964 12MY1967 0.00224 ) C. 00792 ! 1279 1571 C.0C393 ) C.CC117 ) ( 1573 ( 1570 GS21 HO 1 60C1967 185E1967 0.00112 ) 0.00471 I 1574 1522 GS22 BH 1 60C1967 18SE1967 0. 00288 ) 0.00182 ) 1524 1523 PI 1 PA 1 20SE1967 19SE1967 C. 04378 1 C.C3690 ) ( 1350 BH 2 15AP1967 0.05506 ) 1401 MC 2 6PY1967 0.00588 ) 1406 GB 2 ' 13MY1967 C.0C270 ) Gomphonema parvulum var. mioropus (Kutz.) Cleve Gomphonema mioropus Kutzing, Bacill., p. 84, pi. 8, fig. 12. 1844. Gomphonema parvulum var. mioropus (Kutz.) Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 26(2): 180. 1894. 306 GCSCLAVM TOT NO OF STATICNS Gomphonema sphaerophorum Ehr. Gomphoneam sphaerophorum Ehrenberg, Ber. Akad. Wiss. Berlin, 1845:78. 1846. 307 GOSPHAER TOT NO OF STATIONS ( 1350 BH 2 19AP1967 0.00661 ) ( Gomphonema subtile Ehr. Gomphonema subtile Ehrenberg, Ber. Akad. Wiss. Berlin, 1841:128. 1843. 308 GOSUBTIL TCT NO CF STATICNS 50C1967 0.00144 I 98 Gomphonema subtile var. sagitta (Schum.) Grun. •i ii Gomphonema sagitta Schumann, Schrift. Phys.-Okon. Ges. Konigsberg, 3:187, pi. 9, figs. 19a-d. 1863. Gomphonema subtile var. sagitta (Schum.) Grun. in: Van Heurck, Syn. Diat. Belgique, pi. 23, fig. 27. 1880. 309 GCSUBTVS TCT NO OF STATIONS 23AP1S67 0.00137 I ( Gomphonema tergestinum (Grun.) Fricke Gomphonema semiapertum var. tergestina Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 25, fig. 40. 1880. Gomphonema tergestinum (Grun.) Fricke in: A. Schmidt, Atlas Diat., pi. 234, figs. 39-43. 1902. 310 G0TERGES TOT NC OF STATIONS 5CC1967 0.C1239 ) ( 14C4 10KY1967 0.02541 ) I Species incertae sedis Gomphonema sp. #2. 311. G0SPECCB TGT NO CF STATIONS 12 (46919 CH _( 46768. EV ( 1394 GS18 A..AS30 _MR_1_ 5JN1947 _16(1R1«8 13MV1967 5CC1967 0.00455 ) „0.0_2940 ) 0.00172 I __0 ,_01239_ ) 146758 _(4675I EV EV ( 1397 I 14C4 5JN1937 30MR1938 GS21 MC 2 C. 01070 ) 0.02233 I 13HV1967 10MY196? C. 00065 ) 0.02541 I (46752 EV ( 1285 F 1 ( 1560 ( 14C5 GS 8 ES 2 Gomphonema sp. #3. _.3_L2_ GOSPECOC TCT NO OF STATIONS 3 X46920 CH 200E1946 0.0CC31 ) 146752 15SE1937 0.02177 1 Gomphonema sp. #6. 15SE1937 15SE1964 40C1967 12I L Genus Hannaea Patr. Patrick in: Patrick and Reimer Acad. Nat. Sci. Philadelphia Monogr., 13:131. 1966. Members of the genus Hannaea axe. most abundant in periphyton communi- ties, especially in mountain streams and cold, oligotrophic lakes. Like several members of the closely related genus Fragilaria which have similar habit, they are apparently successful in the plankton under certain condi- tions. In Lake Michigan occasional specimens are taken in plankton collec- tions from nearshore areas but the genus is rarely noted in offshore collec- tions . Hannaea arcus (Ehr.) Patr. Navicula arcus Ehrenberg, Infusionsthierchen, p. 182, pi. 21, fig. 10. 1838. Hannaea arcus (Ehr.) Patrick in: Patrick and Reimer, Acad. Nat. Sci. Phila- delphia Monogr., 13:132, pi. 4, fig. 20. 1966. —124 HKARCUS TCT NC CF STATIONS 1 J- L244_ F_l 11JN1964 C.CC110 ) Hannaea arcus var. amphioxys (Rabh.) Patr. Ceratoneis amphioxys Rabenhorst, Sussw.-Diat. , p. 37, pi. 9, fig. 4. 1853. Hannaea arcus var. amphioxys (Rabh.) Patrick in: Patrick and Reimer, Acad. Nat. Sci. Philadelphia Monogr., 13:133, pi. 4, fig. 21. 1966. 325 HNARCUVA TOT NO OF STATIONS 2 _L_ 125J F_J, 6JL1564 0.0C236 ) [ 1403 CA 2 10WY1S67 0.02615 ) 1 Genus Hantzschia Grun. Grunow in: Cleve and Grunow K. Svenska Vet.-Akad. Handl., Ny Foljd, 17(2): 103. 1880. Freshwater members of the genus Hantzschia are most abundant in epipelic communities in aquatic habitats and in the soil flora. Only occasional iso- lated specimens have been noted in plankton collections from Lake Michigan. Hantzschia amphioxys (Ehr.) Grun. Eunotia amphioxys Ehrenberg, A fig. 26. 1843. Hantzschia amphioxys (Ehr.) Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17(2): 103. 1880. Eunotia amphioxys Ehrenberg, Abh. Akad. Wiss. Berlin, 1841:413, pi. 1(1), fig. 26. 1843. 101 326 HAAMPH10 TOT J 8.84197 ) (46744 (4674? ) (46748 (46762 EV EV 13CC1937 18KR1938 0.46968 ) 2.11734 ) (46767 (46772 EV EV 27CC1937 1SAP1938 C.3C947 ) C.C4256 ) (46756 (46766. EV EV 27AP1938 14CE1938 0.03358 2.94677 (46759 ( 1233 EV B 3 19MY1938 5JN2964 0.00338 ) 3.00064 1 (46761 ( 1234 EV B 3 27KY1938 18JM964 0.02453 ) 1.18084 ) ( 1235 1 1738 C 7 D 3 16JN1964 11JN1964 0.01130 0.00800 I 1236 ( 1240 C 1 0 6 8JN1964 10JN1964 2.20542 ) 0.25770 ) ( 1237 I 1241 C" E 2 2 8JN1564 13JM964 1.53390 ) C. 55298 ) ( 1242 ( 1245 E 3 F 2 13JN1964 11JN1964 0.00300 0.02766 ( 1243 ( 1246 E 6 F 3 13JN1964 11JN1964 0.10023 ) C. 01195 ) ( 1244 ( 1247 F B 1 3 11JN1964 14JL1964 C. 05811 ) C. 26892 ) ( 1248 J_i2A£L_ B 3 C 3 24JL1964 8JL1964 0.27587 0.29332 I 1440 ( 1250 B 6 C 6 UJU964 10JL1964 0.02948 1 0.00822 ) ( 1441 ( 1251 B C 6 7 24JL1964 16JU964 0.00220 ) C. 14485 ) ( 1252 ( 1255 C 1 D 5 16JL1964 15JL1964 3.90516 0.00257 1 1253 I 1256 C 2 E 2 16JL1964 14JL1964 0.28985 ) 0. 09709 ) ( 1254 ( 1257 D E 2 3 15JL1964 14JL156* 0.26815 ) C.C0718 ) ( 1258 ( 1?61 F 1 R 3 6JL1964 ?AI)196ft 0.04248 0. (18046 ( 1259 ( 126? F 2 H 3 6JL1964 17AU1964 0.09606 I C. 10500 ) ( 1260 ( 1442 F B 3 6 6JL1564 2AL1964 C. 01719 ) C.C1365 ) ( 1264 ( 1267 C" 1 0 6 10AU1964 18AU1964 5.94686 ) 0.01081 ( 1265 ( 1268 C 2 E 2 10AU1964 15AU1964 0.04024 ) 0.11489 ) ( 1266 ( 1269 0 E 3 3 18AU1964 15AU1964 C. 01403 ) C.C2837 ) ( 1270 1 1272 F 1 C • 1 1CAU1964 10SE1964 0.01089 0. 18881 ( 1444 ( 1273 B 6 C 2 19SE1964 10SE1964 C. 00606 ) 0.02151 1 ( 1271 ( 1274 C 0 7 1 22SE1964 17SE1564 C. 02611 ) 1C.51C02 ) ( 1275 ( 1278 D 2 D 6 17SE1964 18SE1964 4.51584 0.53607 ( 1276 ( 1279 D 3 E 1 18SE1964 16SE1964 1.45284 ) 3.84812 ) ( 1277 ( 1280 0 E 4 2 16SE1964 16SE1964 0.01239 ) C. 36081 ) ( 1281 ( 1284 E 3 E 6 16SE1964 17SE1964 0.00785 2.11292 ( 1282 ( 1285 E 4 F 1 16SE1964 15SE1964 C. 02216 ) C.22713 ) 1 1283 ( 1286 E F 5 2 16SE1964 15SE1964 C. 02452 ) C. 04378 ) ( 1287 J_JLZ9Q F 3 C 1 D 2 D 5 15SE1964 160C1964 150C1964 14CC1964 0.08507 0.30699 0.04245 0.OC393 ( 1288 ( 1291 ( 1294 ( 1297 B 3 C< 2 0 3 D 6 15GC1964 16GC1964 150C1964 140C1964 7.00945 1 C. 68490 ) ( 1445 ( 1292 B 0 6 1 140C1564 15GC1964 C. 66210 ) C. 57394 ) ( 1293 ( 1296 0.02967 ) 0.29131 ) ( 1295 ( 1298 D E 4 1 150C1964 12GC1964 0.00595 ) C. 47124 ) ( 1299 ( 1302 E 2 E 5 120C1964 13CC1964 0.73516 0.29962 ( 1300 ( 1303 E 3 E 6 130C1964 130C1964 C. 22552 ) C. 29106 1 ( 1301 ( 13C4 E F 4 1 130C1964 110C1964 C. 01766 ) C.C8397 ) ( 1305 ( 1308 F 2 C 7 D 1 0 4 110C1964 6N01S64 8N01964 9K01964 0.05520 0.01825 ( 1306 ( 1309 F 3 C 1 110C1964 10NQ1964 0.04158 ) C.C8C40 1 ( 1307 ( 1310 B C 6 2 N01964 10SC1564 C.5C512 ) C.C3401 ! ( 1311 ( 1314 0.02064 ) 0.01435 ( 1312 1 1315 0 2 D 5 8N01964 9N01964 0.29179 ) C. 01820 1 1 1313 ( 1316 D 0 3 e 9NC1964 9NC1964 0.C2896 ) C.C6422 ) ( 1317 I 1120 E 1 E 4 6N01964 7N01964 0.15892 0.07859 ( 1318 ( 1321 E 2 E 5 7N01964 7NC1964 0.22639 ) C. 26496 ) ( 1319 ( 1322 E E 3 t 3 7NG1964 7NC1964 6NC1964 2 8HRi967 C.1C997 ) C. 40657 ) ( 1323 ( 1336 F 1 . .cLi - C 7 A '6 6N01964 27JA1967 0.08920 0.67395 ( 1324 ( 1337 F 2 C 3 6N01964 2MR1967 0.32609 ) 0.33510 ) ( 1325 ( 1339 F C C. 32495 ) C. 02182 ) ( 1340 ( 1343 28MR1967 19AP1967 0.00291 0.0C139 ( 1341 ( 1344 A 3 C 2 19AP1967 25AP1567 0.32978 ) 0.00331 ) 1 1342 ( 1346 A C 4 7 19AP1967 21AP1967 C. 31581 ) 0.00935 ) ( 1368 A 3 _. A J. E 2 A 3 4MY1567 23MY1967 28HY1967 17JN1967 0.00628 0.01789 0.00336 0.00515 0.01794 13.18429 ( 1369 ( 1411 ( 1415 ( 1432 ( 1435 ( 1447 A 4 C 3 4MY1967 31MY1967 0.CO373 ) C. 02462 ) ( 1371 ( 1412 C C E C E A 3 5 e 3 2 6 4KY1967 31MY1967 28MY1967 17JN1961 15JM967 10JC1967 C.C1385 ) C.C7155 ) ( 1414 ( 1431 E 3 A 4 28MY1967 13JN1967 C. 00450 ) 0.01533 1 ( 1416 ( 1433 ( 1436 ( 1448 C. 00875 1 C. 18086 1 ( 1434 ( 1446 C 5 A 3 17JN1967 11JL1967 C 7 A 4 13JM967 11JL1967 0.01263 1 C.C9590 ) C. 02895 ) C. 01061 1 ( 1451 ( 1504 C 7 A 3 16JL1567 28AU1967 0.03543 0.34564 1 1452 ( 1511 E 2 E 2 14JL1567 ISE1967 0.29804 ) 2.14876 ) t 1454 ( 1532 E A 5 3 15JL1967 18SE1967 C.3C806 1 2.75944 ) ( 1533 A 4 E 2 C 3 F 3 19SE1967 24SE1967 _ 4CC1567 1 1DC1967 0.40850 2.48132 2.28942 0.07120 1 1534 ( 1537 ( 1540 ( 1543 A 6 E 3 C 5 E 5 19SE1967 24SE1967 4CC1967 10GC1967 2.38886 ) 0.02588 ) ( 1535 ( 1538 C E 7 5 20SE1961 23SE1967 C.C7C81 ) C. 23201 ) ( 1539 1 154? C. 09927 ) 0.25140 ) ( 1541 ( 1380 E GS 2 4 110C1567 9MY1967 4.84274 ) C.0C336 ) ( 1387 GS11 GS14 GS17 GS20 GS 1 GS 4 12MY1567 _L2JU(196J 13KY1967 L3MY1967 30C1967 30C196 7 0.01188 2.0 5520 .. 1.02454 35.89212 1.08162 0.16816 ( 1388 ( 1391 ( 1394 ( 1397 ( 1555 ( 1558 GS12 GS15 12KY1967 12KY1967 4.22323 1 1.22588 ) ( 1389 ( 1392 C-S13 CS16 12HY1967 12MY1967 2.52688 ) 8.41372 1 ( 1393 GS18 GS21 13KY1967 13KY1967 1.32453 ) 3.80004 ) ( 1395 ( 1398 CS15 CS22 13HY1567 14HY1967 3CC1967 40C196 7 2.C5510 ) C. 02429 ) ( 1554 I 1557 GS 2 GS 5 3GC1967 4CC1967 C. 20833 I C. 17045 ) ( 1556 ( 1559 GS GS 3 7 C.C2607 ) C. 26929 I ( 1560 GS 8 GS1 1 4CC1967 5CC1967 C. 08029 3.60095 ( 1561 { 1564 GS 5 GS12 4GC1967 5CC1967 0.09978 ) 7.14333 1 1 1562 ( 1565 GS10 GS13 50C1967 50C1967 C. 09622 ) 2.3C707 > ( 1566 GS14 5CC1967 21.16877 ( 1567 GS15 5GC1967 28.11824 ) ( 1568 CS16 50C1967 42.92867 ) 104 1 1569. _G£li ... 5CC1967. 60C1967 60C196 7 U. 63103 1 1570 GS GS ML L8 SUL196/ 11. 35422 1 lb/1 GS 19 6DC1967 41.1C005 ) ( 1572 ( 1575 GS20 GS28 31.67134 ) 39.01532 ) 1573 1544 ?1 1 6CC1967 20C1967 53.22925 ) 82.57916 ) 1574 1547 GS22 MS 1 60C1S67 2CC1967 1.0C673 ) 6C. 42314 ) ( 1546 ( J12_2_ LU &H TR GH 1 1 1 JL 20C1967 16SE1967 20SE1967 25SE1967 78.18736 ) 61.03462 I 2.71698 ) 38.14032 1 1520 1523 HO RA KW 1 1 1 1 18SE1567 19SE1967 35.07944 ) 0.14760 1 1521 1 1526 SH 1 1 ieSE1967 20SE1967 6C. 92775 ) 1C.65C28 ) ( 1527 ( 1531 1529 1545 20SE1967 2CC1967 1.00731 ) 20.00134 ) 1530 1548 FR CA 1 1 24SE1967 3CC1S67 47.84477 I 7.S3C85 ) ( 1549 ( 1550 MO MR 1 1 40C1967 5CC1967 21.04974 ) 2.57713 1 1551 1553 ES SG 1 1 5CC1967 6CC1967 8.56298 ) 21.5C410 ) 1552 1428 SM MU 1 2 60C1567 29MY1967 16.05809 I 71.73460 ) ( 1426 ( 1417L MS HO 2 2 29MY1967 _22NY1967 1.85827 ) 4.90504 ) 1351 1418 MI SH 2 2 21AP1967 22MY1967 0.01862 ) 1.24417 ) 1427 1350 LU EH 2 2 29MY1967 19AF1967 10.07264 ) 37.07407 1 ( 1401 ( 1354_ MO GH MO 2 2 2 2 6M.Y1967 25AP1967 10MY1967 19AP1967 0.02352 ) 3.42453 ) 1402 1429 TR WL 2 2 6MY1967 29KY1967 0.01083 ! 28.70792 1 1353 1403 FR CA 2 2 23AP1967 10MY1967 C. 18987 ) C. 32693 ) ( 1404 I 1144 27.64227 1 0.02155 ) 14C5 1406 ES 2 2 12MY1967 13MY1967 1.65758 ) 9C. 06065 1 ( 1407 1420 SM IH 2 ? 14MY1967 23MY1967 3.72604 ) C. 27190 1 ( 1421 ( 1430 CH MC 2 2 23MY1967 12JMS67 0.19084 1 0.04935 ) 1422 GA 2 23MY1967 C. 03065 ) 1423 bA 2 25MY1967 C.0C856 ) Melosira granulata fo. spiralis Grun. Melosira (granulata?) var. spiralis Grunow in: Belgique, pi. 87, figs. 20-22. 1882. Van Heurck, Syn. Diat. Cells curved in the pervalvar, forming lax spiral colonies. Other mor- phologic features, including pleomorphic ornamentation, essentially similar to the nominate variety. Our collections of this entity mostly come from highly eutrophied en- vironments . 335 ME -,R»NFf. 10T NO OF STATIONS ?? FV 60C1937 0.00975 ) 1454 E 5 15JL1967 C.28006 I 1511 E 2 ISE1967 C.C5218 ) ( 1512 ( 1542 E 3 E 3 1SE1967 110C1967 0.00785 J C. 01017 ) 1536 1396 E 2 GS20 24SE1967 13MY1967 0.07635 ) C. 00592 ) 1541 1555 E 2 C-S 2 11GC1967 30C196 7 C. 01064 ) C.C1C59 ) ( 1558 ( 1520 GS 5 HO 1 40C1967 18SE1967 0.00793 ) 3.77198 ) 1573 1521 GS21 SH . 60C1967 18SE1967 C. 02240 ) 0.14424 ) 1544 1522 MU 1 6H 1 20C1967 18SE1967 7.05316 ) C. 87526 ) ( 1531 ( 1428 GH 1 MU 2 25SE1967 29MY1967 0.85376 ) 0.77134 ) 1545 1417 UL 1 HO 2 20C1967 22MY1967 0.10136 1 C. 01495 I 1549 1429 MO 1 kL 2 40C156 7 29MY1967 C. 02741 I C. 06370 ) Melosira granulata var. angustissima 0. Mull. Melosira granulata var. angustissima 0. Muller, Hedwigia, 38:315, pi. 12, fig. 28. 1899. Cells elongate-cylindrical, only 3-6u in diameter. Length of the per- valvar axis more than 5 times the diameter of the valve. Other features of the morphology and ornamentation of the frustule essentially similar to the nominate variety. 336 MEGRANVA TCT NC CF STATIONS 152 (46910 (46924 CH CH CC1945 10MY1946 0.00546 1 0.00212 ) 46521 46923 Ch CH 23N01S45 22N01946 C. 00194 ) 0.01311 ) 46914 46916 Ch CH 15AP1546 4MY1947 C.0C214 ) C. 00407 ) (4690 7 (46744 CH EV JL1947 60C1937 0.00099 ) 0.13656 ) 46922 1232 CH E 5 21AU1547 16MY1964 C. 00291 ) 0.00696 I 46750 1233 EV B 3 24SE1937 5JN2964 C. 32992 ) 0.33340 ) I 1236 ( 1247 C B C D 1 3 7 2 8JM964 14JL1964 16JL1964 15JL1964 0.29931 ) 0.00854 ) 1237 1248 C« B 2 a 8JN1964 24JL1564 C. 60325 ) 0.00985 ) 1241 1249 1253 1257 E C C E 2 3 2 3 2 1 13JN1964 8JL1964 16JL1564 14JL1964 10AU1964 10SE1964 C.C6653 ) 0.01086 ) ( 1251 < 1254_ 0.00579 ) 0.02681 ) 1252 1256 c E 1 2 16JL1964 14JL1964 0.03626 ) C. 04030 ) C. 01365 ) C.0C479 ) ( 1261 ( 1266 B 0 3 3 2AU1964 18AU1964 0.00785 ) 0.01403 ) 1264 1268 C1 E 1 2 10AU1964 15AU1964 1.35156 ) 0.00547 ) 1265 1272 C c 0.01341 ) C. 11082 ) ( 1273 ( 1277 C 0 2 4 10SE1964 18SE1964 0.01613 ) 0.01239 1 1274 1279 0 E 1 1 17SE1964 16SE1964 C.C1408 ) 0.29057 1 1275 1280 D E 2 2 17SE1964 16SE1964 C. 09677 ) C. 05446 ) ( 1284 (. 1445 E 8 6 6 17SE1964 140C1964 0.02224 ) 0.01957 ) 1286 1290 F C 2 1 15SE1964 160C1964 0.02189 ) 0.10612 ) 1288 1291 B C 3 2 150C1964 160C1964 2.85521 ) C. 00245 ) ( 1292 ( 1298 D E 1 1 150C1964 120C1564 0.00373 ) 0.03770 1 1294 1259 0 E 3 2 150C1964 120C1964 0.00330 ) 0. 09739 I 1297 1300 0 E 6 3 140C1964 130C1964 0.00190 ) C.C5012 ) ( 1302 i_1206 E F 0 E 5 3 6 3 130C1964 110C1564 9N01964 7N01964 0.02024 ) 0.00554 ) 1303 1308 E C 6 7 13GC1964 6N01564 0.10075 ) C. 01217 1 1305 1309 F C> 2 1 110C1964 10NC1S64 0.CC690 ) C.CC965 ) < 1316 ( 1319 C.O0756 1 0.00524 J 1317 1320 E E 1 4 6NC1964 7N01964 0.00574 ) C.C1241 1 1318 1321 E E 2 5 7N01964 7NC1964 C.C1712 ) 0.00319 ) ( 1322 ( 1338 E c 6 3 7N01964 28MR1967 0.01666 ) 0.00793 ) 1323 134C F C 1 7 6NG1964 28MR1967 0.00557 ) 0. 00436 ) 1337 1341 C A 3 3 2MR1967 19AP1967 C.C1176 1 C. 12475 ) ( 1342 ( 1408 A _A_ 4 3 19AP1967 23MY1567 0.34288 ) 0.C17S5 ) 1346 1411 C C 7 3 21AP1967 31MY1967 0.00267 1 C. 00821 ) 1348 1412 E C 5 5 23AP1967 31MY1937 C. 00137 ) C.CC842 ) ( 1432 ( .14.4 6_. A A E C 4 3 2 3 13JN1967 11J1.1967 14JL1967 2SE1967 0.02299 ) C. 94173 ) 1433 1447 c A 3 4 17JN1967 11JL1567 0.11626 ) 0.01403 1 1436 1451 E C 2 7 15JN1967 16JL1S67 C.0C724 I C.CC197 ) I 1452 ( 1508 0.52157 ) 0.00400 ) 1454 1511 6 6 5 2 15JL1967 1SE1567 C. 03001 ! C. 05525 1 1506 1532 A A 6 3 29AU1967 18SE1967 C. 01046 ) C.5C590 ) ( 1533 -L.1536 A E 4 2 19SE1967 24SE1967 0.03714 ) 0.11180 ) 1534 1537 A B 6 3 19SE1967 24SE1967 0.29163 ) 0.0646 9 ) 1535 1538 C E 7 5 20SE1967 23SE1967 C. 00966 ) C. 01105 ) ( 1539 C 3 ._£SJL1_ 40C1967 12MY1967 1.17742 1 0.00792 ) 1541 1388 E 2 GS12 110C1967 12MY1967 C. 10643 I 0.05430 1 1542 1389 E 3 CS13 110C1967 12MY1967 C. 01017 ) C. 32746 ) ( 1391 ( 1394 GS15 GS18 12MY1567 13MY1S67 0.01915 I 0.01376 ) 1392 1395 GS16 GS19 12MY1967 13MY1967 0.09554 1 C. 08220 ) 1393 1356 GS17 GS20 13MY1967 13MY1967 C. 01096 ) 3.62547 ) 105 ( 1397 1 1558 GS21 GS 5 13MY196 1 40C1967 U.U83U6 1 0.00396 1 1354 1560 lib GS 1 8 30C1967 40C1967 0.14943 ) C. 02361 ) 1556 1561 GS 3 GS 9 30C1S67 40C1967 C. 01043 ) C.C1174 ) 1 1563 .1 156i_ GS11 GS14 50C1967 50C1967 0.00468 ) 0.05723 ) 1564 1567 GS12 GS15 50C1967 50C1967 C. 19587 ) 0.06510 ) 1565 1568 GS13 GS16 50C1967 50C1967 C. 02535 ) 1.41412 ) ( 1569 1 1573 GS17 r,S2i 5GC1967 MIC. 1967 0.13973 ) 1.01912 1 1571 1574 GS19 __G£22 _ 60C1967 6HC1967 0.13698 1 C. 04890 1 1572 1575 GS20 GS28 6CC1967 60C1967 C. 12618 I C. 38706 ) ( 1544 < 1521 SH 1 1 20C1967 18SE1967 4.42252 ) 3.23102 1 1547 1522 MS BH 1 1 20C1967 18SE1967 0.16766 ) 1.77969 1 1520 1523 HO 1 RA 1 18SE1967 1SSE1967 14.86162 ) C. 01845 ) I 1S26 ( 1530 MO f=R 1 I 20SE1967 24SE1967 1.09234 I 4.80048 ) 1527 1531 TR GH 1 1 20SE1967 25SE1967 0.08176 ) 19.07016 I 1 1529 1545 KM 1 kL 1 20SE1967 20C1967 C. 02398 1 C. 23650 ) ( 1548 ( 1552 CA SM 1 I 30C1967 60C1967 0.05088 ) 0. 20469 ) 1549 1550 MO MR 1 1 40C1967 50C1967 0.78114 ) 1.44963 ) 1551 t 1553 ES 1 SG 1 50C1967 60C1967 C. 41537 1 1.29260 ) ( 1428 1 1417 MU HO TR CA 2 2 2 ? 29MY1967 22MY1<67 6MV1967 10MY1967 8.87041 1 1.0767T 1 1426 1418 MS SH 2 2 29MY1967 22MY1967 0.66142 I 0.38880 1 1427 I 1399 LU 2 PW 2 29MY1967 5KY1967 0.30266 1 C.C136C ) ( 1402 [ 1403 0.03249 ) 0.05231 1 1354 1404 GH mc 2 2 25AP1967 10MY1967 0.09839 ) 2.03252 1 1429 1405 KL 2 ES 2 29MY1967 12MY1967 5.43582 ) C. 36120 ) t 1407 SM 2 14MY1967 0.01194 ) 1406 GB 2 13MY1967 C. 56072 ) Melosira granulata var. angus.tissima fo. ourvata (Grun.) Melosira granulata var. ourvata Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 87, fig. 18. 1882. Cells bent in the pervalvar axis, forming lax spiral colonies, morphologic features essentially similar to var. angustissima. Other Both of the above entities are found in abundance only in eutrophied portions of Lake Michigan. M. granulata var. angustissima fo. ourvata seems to occur only under highly eutrophic conditions and may represent a response of the previous variety to such conditions. 337 MEGRVAFC TOT NO OF STATIONS 10 I 1396 GS20 ( 1522 BH 1 13MY1<=67 18SE1967 0.03330 1 0.40845 1 ( 1568 < 1531 GS16 GH 1 50C1967 25SE1967 C. 00289 1 0.99746 ) ( 1544 ( 1428 MU 1 MU 2 20C1967 29MY1967 C. 53375 1 C. 00301 I < 1417 HO 2 1 1406 GB 2 22MY1967 13MY1967 0.02243 1 0.24801 1 ( 1350 ( BH 2 19AP1967 1.C5725 ) ( 1429 hi 2 25MY1967 C. 11679 l Melosira granulata var. muzzanensis (Meist.) Bethge Melosira muzzanensis Meister, Kryptog.-Fl. Schweiz, 4(1) :41, pi. 1, fig. 10. 1912. Melosira granulata var. muzzanensis (Meist.) Bethge, Pflanzenforsch. , 3:32. 1925. In this entity the pervalvar axis of cells is much shorter than in the nominate variety, height of the valve mantle only 4-8u. This variety is apparently not polymorphic and all observed specimens are finely structured. Other morphologic features essentially similar to the nominate variety. This entity occurs occasionally but always in low abundance in our col- lections from Lake Michigan. Its taxonomic status is somewhat questionable in that it does not show the polymorphism characteristic of the other vari- eties of this taxon. It should be pointed out that post-auxospore valves of M. islandioa have similar length to width ratios. 338 HFISIAVA TOT NO OF STATIONS 65 (46914 __£H 19AP1946 0.00214 1 46924 CH 10MY1946 0.00282 ) 469C6 CH MY1947 C. 00531 ) ( 1251 I 1257 C E 7 3 16JL1964 14JL1964 0.00579 I 0.00957 ) 1254 1281 D E 2 3 15JL1964 16SE1964 0.01341 1 C. 00785 ) 1255 1341 0 A 5 3 15JU964 19AP1967 C. 01027 ) C.0C868 1 ( 1342 1 1346 A C 4 7 19AP1967 21AP1967 0.01444 ) 0.01068 ) 1344 1347 C E 3 2 25AP1967 23AP1967 0.02151 ) 0.00650 ) 1345 1348 C E 5 5 25AP1967 23AP1967 C.CC975 1 C.CC548 ) ( 1368 < 1371 A C 3 3 4MY1967 4MY1967 0.08797 > 0.34858 ) 1369 1272 A C 4 5 4MY1967 5MY1967 G. 04846 ) 0.06029 1 1370 1373 A C 6 7 3MY1967 5MY1967 C.0C691 ) C. 13121 ) 1 1374 I 1408 E A 2 3 7MY1967 23MY1967 0.00598 1 0.01789 1 1375 1409 E A 3 4 7MY1967 23MY1967 C. 01925 ) 0.05356 I 1376 1410 E A 5 6 6MY1967 24MY1967 C. 01687 ) 0.04511 ) ( 1411 1 1414 C F. 3 2 31MY1967 28MY1967 0.C3282 ) 0.10411 ) 1412 1415 C E 5 3 31MY1967 28MY1967 0.04630 1 0.07870 ! 1413 1416 C E 7 5 25MY1967 28MY1967 0. 02527 ) C.0C875 1 ( 1432 1 1435 A r. 4 7 13JN1967 13JNIS67 0.01533 ) 0.03473 1 1433 1436 C E 3 2 17JN1967 15JN1967 0.08397 ) 0.02171 1 1434 1437 C . E 5 3 17JN1967 15JN1967 16JL1967 24SE1967 C.0658C ) C. 47103 1 1 1438 ( 1511 E E 5 2 14JN1967 1SE1967 0.06173 1 0.00614 ) 1446 1512 A E 3 11JL1567 1SE1967 C. 00978 I 0.00393 > 1449 1537 C E 3 3 C. 06496 1 C. 01725 ) ( 1538 I 138? E G„S 5 6 23SE1967 10MY1967 0.01105 ) 0.02220 I 1377 1384 GS GS 1 8 9MY1967 10MY1967 0.05937 ) 0.01109 ) 1380 1365 GS GS 4 9 9MY1967 10MY1967 C. 01009 ) 0.00942 ) ( 1386 1 1389 GS10 GS13 12MY1567 12MY1967 0.01149 I 0.00516 ) 1387 1394 GS11 GS18 12MY1967 13MY1967 0.02376 1 0.00344 ) 1388 1397 GS12 GS21 12MY1967 13MY1967 C.C161C ) C. 00392 ) ( 1398 1 1428 GS22 MU 2 14MY1967 29MY1967 0.CC911 ) 0.00603 ) 1567 1426 GS1S MS 2 5CC1967 29MY1967 0.01111 ) 0.02100 ) 1569 1400 GS17 SB 2 50C1967 6MY1967 C.CC257 ) C. 01191 1 ( 1422 GA 2 23MY1S67 C. 01022 1 1424 KN l 25MY1S67 0.02665 ) 106 Melosira islandiaa 0. Mull. Melosira islandiaa 0. Mtiller, Jahrb. wissench. Bot., 43:56, pi. 1, figs. 3-6. 1906. Cells cylindrical, joined by the valve faces into long, closely ap- pressed filamentous colonies. Individual valves of specimens from Lake Michi- gan 8-30u in diameters, 7-21y high (valve mantle). Pseudosulcus little de- veloped, apparent only as a narrow, sharply-angled identation. Sulcus a shallow furrow with an internal thickening intruding into the interior of the cell. Neck short, in optical section more or less bowl-shaped. Degree of silicif ication and ornamentation of the frustule highly variable. Orna- mentation of the valve surface consists of numerous, randomly arranged, small areolae. The margin of the valve is usually furnished with a corona of very small and inconspicuous spines. Ornamentation of the valve mantle is pleo- morphic. In all cases the elements are arranged in rows running parallel to the pervalvar axis. The following types of ornamentation may be found: Status a: Ornamentation of the valve mantle consisting of rows of coarse, circular areolae. Areolae rows 10-12 in 10y with 12-13 areolae in lOp within the individual rows. Frustules are heaA/ily silicif ied. Status B: Both finely and coarsely areolate frustules found in the same colony. Status i" : Ornamentation of the valve mantle consisting of fine circular areolae. Areolae rows 13-16 in lQu with 14-18 areolae in lOy within the rows. This species is usually abundant and often dominant in spring collec- tions from Lake Michigan. Populations from the offshore waters have usually been referred to M. islandiaa subsp. helvetica 0. Mull. In the material that we have examined we can find no justification for the sub-specific designa- tion for specimens from Lake Michigan. The populations of variable mor- phology grade together to the extent that any separation is entirely arti- ficial. It appears that environmental conditions determine the degree of silicification to at least a certain degree as collections from the eutro- phied portions of the lake contain only coarsely structured specimens. Auxo- spore populations are common and post-auxospore cells usually are charac- terized by much foreshortened pervalvar axes. 339 MEISLAVH t TOT NO OF STATIONS 311 (60973 1 '1-507 CH r.H 1876 19FE1881 3.61360 ) 4.75436 ) ( 3540 (46921 CH CH 11MY1879 23K01945 8.6194B ) 0.00194 ) ( 3541 (469C8 CH CH 1FE1881 DE1945 5.92781 1 0.46324 ) (46917 146924 CH r.H 12JA1946 10MY1946 0.18021 ) 51.40315 ) (46915 (46923 CH CH 20FE1946 22N01946 1.84943 ) 0.08305 ) (46914 (46920 CH CH 19AP1946 20DE1946 38.55402 ) 0.13033 ) (46905 (46916 CH CH JA1947 4MY1947 1.07611 ) 1.03653 ) (46909 (469C6 CH CH WU947 HY1947 12.13515 I 14.84C18 ) (46912 (46919 CH CH AP1947 5JN1947 25.41106 ) C. 19727 I (46907 (46758 CH FV JL1947 S.IN1937 0. 80131 ) 34.34846 1 (46913 (46771 CH EV 6AU1947 11JN1937 0.26148 ) 5C. 72511 1 (46922 (46743 CH EV 21AU1947 20JN1937 C. 37802 ) 20.86151 ) (46745 (46757 EV EV 3JL1937 25JL1937 0.18809 ) 2.29166 ) (46770 (46747 EV EV 9JL1937 1AU1937 0.03578 ) 2.91111 1 (46764 (46763 EV EV 17JL1937 23AIU937 2.25624 ) 1.C349C ) T46769 (46 744 EV FV 7SE1937 60C1937 0.04342 ) 0.23410 ) (46752 (46748 EV EV 15SE1937 130C1937 0.06530 ) 78.30913 ) (46760 (46767 EV EV 22SE1937 270C1937 C.C2462 ) C. 05029 ) (46749 (46751 EV EV 12MR1938 30MR1938 27.86745 ) 56.58775 1 (46768 (46772 EV EV 16MR1938 18AP1938 58.03322 I 61.80269 ) (46762 (46756 EV EV 18MR1938 27AP1938 2.82311 1 41.84225 ) (46759 J_1223 EV B 3 19MY1938 18MY1964 80.35110 ) 75.91217 ) (46761 ( 1224 EV e 4 27NY1938 18MY1964 36.93448 ) 82.89383 ) (46766 ( 1225 EV C 6 14DE1938 15MY1964 C. 14259 ) 57.35005 ) ( 1226 LA2Z9 C D 7 5 16HY1964 14MY1964 43.68340 ) 43.66580 ) ( 1227 ( 123C c E 2 2 13MY1964 16MY1964 41.60544 ) 54.76366 ) ( 1228 ( 1231 0 E 2 3 14MY1964 16MY1964 58.03928 ) 12.42441 ) ( 1232 ( 1235 E C 5 7 16MY1964 16JN1964 51.13220 ) 7.90804 1 1 1233 ( 1439 8 B 3 6 5JN2964 5JN1964 29.17291 ) 43.91608 ) ( 1234 ( 1236 B C 3 1 18JM964 8JN1964 16.72852 ) 30.01819 ) ( 1237 ( 1240 C D 2 6 8JN1964 10JN1964 30.31708 ) 57.12444 ) ( 1238 < 1241 0 E 3 2 11JN1964 13JN1964 77.70000 ) 60.79486 ) ( 1239 ( 1242 C E 4 3 11JN1964 13JN1964 55.31766 ) 68.12157 ) ( 1243 ( 1246 E E 6 3 13JN1964 11JN1964 48.52585 ) 17.15173 ) ( 1244 ( 1247 F B 1 3 11JM964 14JL1964 11.20577 ) 21.81242 ) ( 1245 ( 1248 F B 2 3 11JM964 24JL1S64 13.06964 ) 17.24205 ) ( 1440 ( 1250 B 6 C & 11JL1964 10JL1964 21.66783 ) 42.87769 ) ( 1441 ( 1251 8 6 C 7 24JL1964 16JL1964 44.40625 ) 6.28657 ) ( 1249 ( 1252 C 3 C> 1 8JL1964 16JL1964 34.22052 ) 11.12971 I 107 I 1253 C 2 16JL1964 38.82143 ) I 1254 C 2 15JL1964 54 .29994 ) t 1255 ( 1256 E 2 14JL1964 60.01318 ) I 1257 E 3 14JL1964 64.14642 ) ( 1258 U 5 15JL1964 38.44771 ) F 1 6JL1964 12.38879 1 ( 1259 F 2 6JU964 2C.6C609 ) ( 1260 F 3 6JL1964 17.78175 ) ( 1261 8 3 2AU1964 3.98383 ) _LJL26_2 _. B 3 17AD1964 6.32087 ) I 1442 B 6 2AU1964 18.15079 ) ( 1443 B 6 16AU1964 19.09619 ) I 1263 C 7 15AU1964 3.36269 ) ( 1264 C 1 10AU1964 1C. 13670 ) ( 1265 C 2 10AU1964 5.47694 ) ( 1266 0 3 18AU1964 20.13469 ) < 1267 D 6 18AU1964 C. 65716 1 ( 1268 E 2 15AU1964 32.93576 ) I 1269 E 3 15AU1964 35.49306 1 ( 1270 F 1 10AU1964 4.38393 ) ( 1444 B 6 19SE1964 17.61192 ) LJL271 C 7 22SE1964 0.91402 ) < 1272 C 1 10SE1964 8.90695 ) ( 1273 C 2 10SE1964 5.4C911 ) 1 1274 0 1 17SE1964 7.22564 ) ( 1275 D 2 17SE1964 5.41900 ) { 1276 D 3 18SE1964 19.55743 ) ( L277 0 4 18SE1964 5.20511 1 I 1278 D t 18SEX964 2.15227 ) ( 1279 E 1 16SE1964 7.14650 ) I 1280 E 2 16SE1964 53.37326 ) 1 1281 E 3 16SE1964 29.39214 ) ( 1282 E 4 16SE1964 8.53186 ) 1 12R3 F 5 16SE1964 24.8866C ) ( 1284 E 6 17SE1964 4.89308 ) ( 1285 F 1 15SE1964 4.6e814 1 ( 1286 F 2 15SE1964 9.96060 ) ( 1287 F 3 15SE1964 6.30504 ) ( 1288 B 3 150C1964 C. 36571 ) ( 1A45 B 6 14CC1964 0.83496 ) 1 1289 C 7 140C1964 C. 67719 1 ( 1290 C 1 160C1964 C.C7580 ) I 1291 C 2 16CC1964 0.34245 ) I 1292 D 1 150C1964 0.71929 ) ( 1293 D 2 150C1964 0.30186 ) I 1294 0 3 15CC1964 1.C9767 ) ( 1295 D 4 15CC1964 1.39137 ) ( 1296 D 5 14CC1964 C. 75933 ) ( 1297 D 6 140C1964 4.53143 ) ( 1298 E 1 12GC1964 0.29082 ) ( 1299 E 2 120C1964 3.95853 1 1 1300 F 3 13CC1964 5.76338 1 ( 13C1 E 4 130C1964 11.12779 ) 1 1302 E 5 13CC1964 4.81820 ) ( 1303 E 6 130C1964 7.83611 ) ( 1304 F 1 11CC1964 0.57789 ) ( 1305 F 2 11QC1964 C. 21909 ) LU06 F 3 110C1964 0.27163 ) t 13C7 B 6 NG1964 C. 80820 1 ( 1308 C 7 6N01964 C. 46838 ) ( 1309 C 1 10N01964 0.00322 ) ( 1310 C" 2 10N01964 0.08163 ) ( 1311 0 1 8N01964 0.00774 ) ( 1312 D 2 8N01964 C. 29179 ) ( 1313 C 3 9NC1964 0.22973 ) ( 1314 0 4 9NG1964 0.55407 ) ( 1315 D 5 9NG1964 C. 57780 1 I 1316 D 6 9N01964 1.58658 ) i 1317 E 1 6NC1964 0.00574 ) < 131H F 2 7NCU964 0.44518 ) ( 1319 E 3 7N01964 1.09968 ) ( 1320 E 4 7NG1964 0.66598 1 ( 1321 E 5 7N01964 0.33518 ) I 1322 E 6 7N01964 0.77982 ) ( 1323 F 1 6NC1964 C. 24390 ) 1 1324 F 2 6ND1964 0.44954 1 I 1325 F 3 6N01964 0.35265 ) ( 1336 C 3 27JA1967 3.23494 ) 1 1337 C 3 2MR1967 53.49872 I i 1338 C 3 28MR1967 51.46242 ) < 1339 C 5 28KR1967 49.10519 ) LJ.340 C 7 28MR1967 56.24677 1 ( 1341 A 3 19AP1967 55.05353 ) ( 1342 A 4 19AP1967 4S. 38214 ) ( 1343 A 6 19AP1967 42.21233 ) ( 1344 C 3 25AP1967 66.82108 ) < 1345 C 5 25AP1967 47.75548 ) 1 1346 C 7 21AP1967 68.32413 ) ( 1347 E 2 23AP1967 58.84074 1 ( 1348 E 5 23AP1967 56.23029 ) ( 1368 A 3 4MY1967 52.56047 ) ( 1369 A 4 4MY1967 73.05527 1 ( 1370 A 6 3MY1967 64.12704 ) ( 1371 C 3 4MY1967 67.22379 ) ( 1372 C 5 5MY1967 62.06554 I ( 1373 C 7 5MY1967 76.67293 ) ( 1374 E 2 7MY1967 59.20502 1 ( 1375 E 3 7MY1967 61.98416 ) ( 1376 E 5 6MY1967 36.2C418 ) 1 1408 A 3 23MY1967 32.86678 ) ( 1409 A 4 23KY1967 49.57448 ) I 1410 A 6 240Y1967 46.17726 I 1 1411 C 3 31MY1967 54.28137 ) ( 1412 C 5 31MY1967 63.64171 ) ( 1413 C 7 25MY1967 72.3C627 ) I 1414 F 2 28MY1967 63.94626 ) ( 1415 E 3 28MY1967 68.30957 ) 1 1416 E 5 28MY1967 57.86263 1 ( 1431 A 3 12JN1967 34.42593 1 1 1432 A 4 13JN1967 52.03329 ) ( 1433 C 3 17JN1967 16.C8551 1 1 1434 r. 5 17JN1967 65.52817 ) 1 1435 C . 13JN1967 55.25211 ) ( 1436 E 2 15JN1967 49.89868 1 ( 1437 E 3 15JN1967 69.71173 ) < 1438 E 5 14JN1967 68.88162 ) ( 1446 A 3 11JL1967 21.06C61 ) ( 1447 A 4 11JL1967 22.10422 t 1 1448 A 6 10JL1967 0.17330 ) ( 1449 C 3 16JL1967 24.07428 ) 1 1450 C 5 16JL1967 35.58983 ) ( 1451 C 7 16J11967 8.81855 ) I 1452 E 2 14J11967 11.17640 ) , i«v< F 3 15.111967 SI. 31056 1 1 1454 F 5 15JL1967 2.66C53 1 ( 1504 A 3 28ALH967 4.14764 1 ( 1505 A 4 28AU1967 3.96784 ) ( 15C8 C 3 2SE1967 5.31532 ) ( 1509 C 5 2SE1967 19.78398 1 1 1510 f. 7 29AU1967 1.77047 ) ( 1511 E 2 1SE1967 5.58676 1 ( 1512 E 3 1SE1967 12.64332 ) C 1513 E 5 31AU1967 4.25661 ) ( 1532 A 3 18SE1967 C.45991 ) 1 1533 A 4 19SE1967 C. 77987 ) 1 1534 A 6 19SF1967 0.01661 > < 1535 C 7 20SE1967 0.22532 ) ( 1536 E 2 24SE1967 4.19916 ) ( 1537 E 3 24SE1967 9.96291 ) ( 1538 E 5 23SE1967 6.18682 1 1 1539 C 3 40C1967 C. 02013 ) 1 1540 C 5 40C1967 0.63037 ) ( 1541 E 2 11GC1967 1.61779 ) ( 1542 E 3 11CC1967 C. 78316 ) ( 1543 E 5 100C1967 0.50280 1 ( 1377 GS 1 9MY1967 59.01443 ) ( 1378 GS 2 9HY1967 33.85054 I ( 1379 GS 3 9MY1967 17.11438 ) ( 1380 GS 4 9MY1967 16.24347 1 ( 1381 GS 5 10MY1967 22.87363 1 1 1382 GS 6 10MY1967 48.18340 ) ( 1383 GS 7 10MY1967 33.30838 ) I 1384 GS 8 10MY1967 49.3C214 ) ( 1385 GS 9 10HY1967 35.10629 ) ( 1386 GS10 12^1967 46.85434 1 < 1387 GSll 12MY1967 23.82445 ) ( 1388 GS1? 12MY1967 25.76169 ) I 1389 GS13 12MY1967 7.40015 ) ( 1390 GS14 12MY1967 13.97534 I 1 1391 GS15 12MY1967 17.09523 1 ( 1392 GS16 12MY1967 14.23860 ) 1 1393 C-S17 13MY1967 16.87486 1 ( 1394 GS18 13MY1967 4.57563 1 t 1395 GS19 13MY1967 3.37036 ) ( 1396 GS20 13HY1967 C. 82868 ) 1 1397 GS21 13MY1967 1.09881 1 ( 1398 GS22 14MY1967 27.20345 1 ( 1554 GS 1 3GC1967 1C. 95851 ) 1 1555 GS 2 30C1967 2.96610 ) ( 1556 GS 3 3QC1967 1.22021 ) ( 1557 GS 4 30C1967 6.27803 ) ( 1558 GS 5 4QC1967 2.08102 1 ( 1559 GS 7 40C1967 5.87536 ) ( 1560 GS 8 4DC1967 8.26524 ) ( 1561 GS 9 4QC1967 9.86089 ) ( 1562 GS10 5GC1967 16.57867 I ( 1563 GSll 50C1967 7.2C198 ) 1 1564 GS12 50C1967 0.02798 1 ( 1565 GS13 5GC1967 0.03549 ) ( 1566 GS 14 50C1967 C. 64208 ) ( 1567 GS15 50C1967 0.61127 I ( 1568 GS16 5GC1967 0.65656 ) ( 1569 GS17 5CC1967 C. 34784 ) _J 157(1 GS18 50C1967 0.63467 ) ( 1571 GS 19 60C1967 C.0O410 1 ( 1573 C-S21 60C1967 C. 03024 ) ( 1574 GS22 60C1967 3.02019 ) ( 1575 GS28 60C1967 0.04129 ) ( 1547 CS 1 2GC1967 2.29940 ) I 1524 MI' 1 20SE1967 0.04378 1 ( 1546 LU 1 20C1967 0. 02001 1 ( 1520 FG 1 18SE1967 C. 75440 ) ( 1523 RA 1 19SE1967 0.00923 1 ( 1526 MO 1 20SE1967 0.71685 1 ( 1527 TR 1 20SE1967 C. 15723 ) 1 1528 SB 1 2CSE1967 0.21658 ) 1 1529 KV. 1 20SE1967 0.81545 ) ( 1530 FR 1 24SE1967 C. 84008 1 ( 1531 GH 1 25SE1967 0.05072 ) ( 1545 hL 1 20C1967 C. 06081 ) < 1548 CA 1 30C1967 0.03816 ) 1 1549 MO 1 40C1967 0.78114 ) ( 1551 ES 1 50C1967 0.03195 ) ( 1552 SM 1 60C1967 C. 25091 ) ( 1550 MR 1 50C1967 0.09912 ) ( 1553 SG 1 6GC1967 0.14689 ) ( 1428 HI 2 29MY1967 C. 14764 ) 1 1426 MS 2 29MY1967 6.71916 ) I 1351 MI 2 21AP1967 31.08145 ) ( 1427 LU 2 29MY1967 19.37045 ) ( 1417 HO 2 22MY1967 4.42650 ) 1 1418 SH 2 22CY1967 3.23484 ) ( 1350 BH 2 19AP1967 C. 96676 1 1 1425 RA 2 25MY1967 29.84705 ) ( 1399 PV. 2 5MY1967 5C. 92491 ) ( 1401 HO 2 6MY1967 50.79962 ) ( 1402 TR 2 6MY1967 50.76889 I ( 1400 SB 2 6MY1967 48.79675 ) ( 1352 KW 2 21AP1967 .19.92764 ) 1 1353 FR 2 23AP1967 6.58228 ) ( 1354 GH 2 25AP1967 7.45663 ) { 1429 WL 2 29MY1967 0.2C172 1 ( 1403 CA 2 10MY1967 16.11089 I ( 1404 MO 2 10MY1967 8.13008 ) ( 1405 ES 2 12MY1967 1.44479 1 ( 1407 SM 7 )4MY1967 3.53496 ) ( 1349 CI 2 19AP1967 44.42847 ) 1 1419 BU 2 23MY1967 16.40424 ) ( 1420 IH 2 23MY1967 10.39275 1 ( 1421 CH 2 23MY1967 18.04301 ) ( 1422 GA 2 23MY1967 15.04113 1 ( 1424 KN 7 25MY1967 27.28484 ) ( 1430 MC 2 12JN1967 C. 04935 ) I Melosira italica subsp. svibavtica 0. Mull. Melosira italica subsp. subartica 0. Muller, Jahrb. pi. 2, figs, 7-11. 1906. Wiss. Bot., 43:78. 108 Cells cylindrical, joined by the valve faces into long, more or less closely appressed colonies. Individual valves of specimens from Lake Michi- gan 7-15u in diameter, 5-20y high (valve mantle). Valve mantle parallel, valve surface flat or only slightly convex. Pseudosulcus very small, not apparent. Sulcus moderately deeply incised, forming a broad angle, with a conspicuous internal thickening extending into the lumen of the cell. Neck very short and poorly defined. Degree of silicif ication of the valve man- tle variable, usually moderately strong. Ornamentation of the valve surface is comprised of very fine, irregularly arranged puncta with elongate, ray- like puncta at the margins. The margin of the valve surface is furnished with a corona of small species. Ornamentation of the valve mantle comprised of spiral rows of fine, usually more or less elongate, puncta. This species is somewhat pleomorphic but does not exhibit the pronounced structural dif- ferences found in other members of the genus. Strongly silicif ied forms (a status) with about 18 striae in 10p and the same number of puncta in lOu within the striae. Weakly silicif ied forms (fr status) with about 20 striae in lQu and about 22 puncta in lOu within the rows. This entity occurs sporadically in our collections from Lake Michigan. It is common in a number of habitats surrounding the lake, and the popula- tions we have encountered are perhaps derived from tributaries to the lake which became established in the open waters. 340 HFITALIC TCT KC CF STATIONS 172„ 146908 r.H DE1945 C. 05035 ) 146914 CH 19AP1946 0.00214 I 469C5 CH JA1947 C.0C368 ) (46909 J__U24_ CH i. 4 MR1947 18MY1964 0.00455 ) 0.10979 ) (469C6 1225 CH C 6 MY1947 15MY1964 C. 00066 ) C. 00784 ) 1223 12 26 B C 3 7 18HY1964 16MY1964 C.0C156 ) C. 01522 1 ( 1227 I 123fl_ c« F B D 2 2 6 3 13MY1964 16MYL964 5JN1964 11.JN1964 0.01645 ) 0.21633 ) 0.01399 ) 0.09600 ) 1228 1231 1236 ( 1239 0 E C' D 2 3 1 4 14MY1964 16MY1964 0.34061 1 0.03180 1 1229 1232 0 E 5 5 14MY1964 16MY1564 C. 08881 ) C. 24349 ) ( 1439 1 l?3fl 8JN1964 11JN1964 0.01225 ) 0.00464 ) 1237 I 1240 C 0 2 6 8JM964 10JN1964 0.C4640 ) 0.02148 ) ) 1241 ( 1244 E F 2 1 13JN1964 11JN1964 C. 07836 ) 0.00548 ) 1242 1245 E F 3 2 13JN1964 11JN1964 0.14837 1 0.01383 ) ( 1243 1246 E F 6 3 13JM964 11JN1964 C.C3758 1 C. 03586 1 ( 1440 L 125.5 B 0 F E 6 5 11JL1964 15JL1964 0.00369 ) 0.00513 ) 1250 1256 C E 6 2 10JL1964 14JU964 0.02878 ) 0.06412 ) 1254 1257 0 E 2 3 15JL1964 14JL1964 C. 00575 ) C. 06939 ) ( 1259 ( 1268 2 ? 6JL1964 15AU1964 0.00310 1 0.00547 ) ( 1260 ( 1269 F E 3 3 6JL1964 15AU1964 0.00764 ) C. 09 3 19 ) 1262 1270 B F 3 1 17AU1964 10AU1964 C.CC630 ) C.CC272 1 ( 1281 ( 1300 E E 3 3 16SE1964 130C1964 0.0157C ) 0.01074 ) 1297 ( 1301 D E 6 4 140C1964 130C1964 C. 00190 ) 0.00442 ) 1299 1304 E F 2 1 120C1964 110C1964 C.0C314 I C.CC988 I I 1317 ( 1322_ E F 1 6 6N01964 7N01964 0.00574 ) C. 01000 ) 1320 1336 E C 4 3 7N01964 27JA1967 0.00414 ) 0.19641 ) 1321 ( 1337 E C 5 3 7N01964 2MR1967 C.0C958 ) 4.62970 ) ( 1338 f 1341 C A 3 3 28MR1967 19AP1967 2.96187 \ 1.51872 1 1 1339 1342 C A 5 4 28MR1967 19AP1967 4.80140 ) 1.51589 1 I 1340 1343 C A 7 6 28MR1967 15AP1967 1.47616 ) C.12158 ) ( 1344 1 1347 C E 3 2 25AP1967 23AP1967 1.27388 ) 6.71490 I 1345 1348 C E 5 5 25AP1967 23AP1967 7.50443 1 1.91912 ) 1346 1368 C A 7 3 21AP1967 4MY1967 1.68240 ) 3.29877 ) ( 1369 ( 1372 A C 4 5 4MY1967 5MY1967 3.65276 1 4.96524 ) 1370 1373 A C 6 7 3MY1967 5MY1967 0.60536 I 3.99338 ) 1371 1374 C E 3 2 4MY1967 7MY1967 4.84787 ) 4.18410 ) ( 1375 ( 1409 E A 3 4 7MY1967 23HY1967 6.40054 ) 4.99911 1 1376 1410 E A 5 6 6MY1967 24MY1967 0.98381 1 0.51308 ) 14C8 1411 A C 3 3 23MY1967 31MY1967 1.565C8 ) 1.72322 ) ( 1412 I 1415 C E 5 3 31MY1967 28MY1967 5.89275 ) 5.82363 1 1413 1416 C E 7 5 25MY1967 28MY1967 3.316S0 ) 1.68333 I 1414 1431 E A 2 3 28CY1967 12JN1967 1.17548 ) C. 63084 ) ( 1432 LJL435_ A C 4 7 13JN1967 13JN1967 5.90068 1 0.88403 ) 1433 1436 C E 3 2 17JN1967 15JN1967 1.80855 ) 7.85208 ) 1434 1437 C E 5 3 17JM967 15JN1967 5.65259 ) 4.14502 ) ( 1438 ( 1448 E A 5 6 14JN1967 10JL1967 2.16049 ) 0.02829 ) 1446 1449 A C 3 3 11JL1967 16JL1967 C. 42806 ) 1.73870 ) 1447 1450 A C 4 5 1UL1967 16JL1967 C. 32747 ) 2.53261 ) ( 1451 1 1454 C E 7 5 16JL1967 15JL1967 0.06693 1 O.C1600 ) 1452 15C4 E A 2 3 14JL1967 28AU1967 0.48537 ) 0.01481 ) 1453 15C6 E A 3 6 15JL1967 29AU1967 13.26997 ) C. 01046 ) ( 1509 LX5.L1 C E 5 5 2SE1967 31AU1967 0.31796 ) 0.02534 ) 1511 1532 E A 2 3 1SE1967 18SE1967 0.06139 ) 0.02957 ) 1512 1534 E A 3 6 1SE1967 19SE1967 3.02340 1 C.CC620 ) ( 1535 1 1538 C E 7 5 20SE1967 23SE1967 0.00644 ) 0.09391 ) 1536 1539 E C 2 3 24SE1967 40C1967 C. 04090 ) C.03C19 ) 1537 1541 E E 3 2 24SE1967 11CC1967 0.83240 I C. 39381 ) ( 1542 ( 1379 E GS 3 3 110C1967 9MY1967 0.47803 ) 0.12998 ) 1377 1380 GS GS 1 4 9MY1967 9MY1967 6.64951 ) C. 23541 ) 1378 1381 GS cs 2 5 9MY1967 1CMY1S67 10MY1967 12MY1967 12MY1967 13MY1967 C. 63496 ) C. 36493 ) ( 1382 ( 1385 GS GS 6 9 10MY1967 10HY1967 0.97144 ) 0.76758 I 1383 1386 GS 7 GS10 10HY1967 12MY1967 0.53464 ) 2.61419 ) 1384 1387 GS 8 CS11 C. 77641 ) 1.C1394 ) 1 1388 ( 1391 GS12 GS15 12MY1967 12MY1967 1.03167 1 0.51717 ) 1389 13S2 GS13 GS16 12MY1967 12NY1967 0.32746 ) C. 09554 ) 139C 1393 GS14 GS17 C. 2466 2 ) C. 29586 ) ( 1394 L1397 GS18 GS21 GS 2 GSU 13MY1967 13MY1967 30C1967 50C1967 C. 11009 ) C. 00589 ) 0.01059 ) 0.00468 ) 1395 1398 1556 1567 1570 1526 GS19 GS22 13MY1967 14KY1967 0.32882 ) 2.33780 ) 1396 1554 GS20 GS 1 GS10 GS16 13KY1967 3CC1967 50C1967 50C1967 C.0C666 ) 0.17790 ) I 1555 ( 15-6-3 - GS 3 GS15 GS18 MO 1 30C1967 50C1967 0.00521 ) C. 01746 I 1562 1568 C. 00987 ) C.0C144 ) ( 1569 I 1574 GS17 CS22 50C1967 60C1967 0.01189 ) 0.00863 1 50C1967 20SE1967 0.00992 ) 0.00569 ) 1571 1528 GS19 SB 1 60C1967 20SE1967 C.0C059 ) C.C1444 ) ( 1549 -(-...L42i>_ M0 1 ? 40C1967 29MY1967 0.01370 ) 1.06037 ) 1550 1351 MR Ml 1 2 50C1967 21AP1967 0.02478 1 0.22964 1 1428 1427 LU 2 2 29MY1967 2SMY1967 0.00301 ) 2.13075 ) ( 1417 L140L- HO mcl 2 ? 22MY1967 6MY1967 0.13085 ) 0.37041 1 1425 14C2 RA TR 2 2 25MY1967 6MY1967 0.01768 ) 0.45484 ) 1399 1400 PW SB 2 2 5MY1967 6HY1967 C. 74129 ) 1.00071 ) ( 1352 1 1429 KW WL 2 2 21AP1967 29MY1967 0.10308 ) 0.16987 ) 1353 14C3 PR CA 2 2 23AP1967 10MY1967 0.10549 ) C. 20923 ) 1354 1405 GH ES 2 2 25AP1967 12MY1967 C. 08976 ) C.C1290 1 ( 1407 L_ 14-21 SM CH 2 2 14MY1967 23MY1967 0.02388 ) 0.05205 I 1349 1422 CI GA 2 2 19AP1967 23MY1967 C. 03233 ) C. 02044 ) 1419 1423 BU hA 2 2 23MY1967 25MY1967 C.C3662 ) C.C6423 ) ( 142 4 KN 2 25HY1967 0.02665 ) 109 Melosiva undulata (Ehr.) Kutz. Gaillonella undulata Ehrenberg, Ber. Akad. Wiss. Berlin, 1840:17. 1840. Melosiva undulata (Ehr.) Kiitzing, Bacill., p. 54, pi. 2, fig. 9. 1844. Cells cylindrical, joined by the valve faces into short, poorly adhering colonies. Individual valves of specimens from Lake Michigan 20-70y in dia- meter, 20-35u high (valve mantle). Valve mantles parallel, valve surfaces flat in the center, convex only at the margins, therefore forming a narrow and inconspicuous pseudosulcus. The sulcus and associated structures are entirely lacking. The walls of the frustule are of varying thickness, thin at the girdle margins, much thicker at the valve mantle, then becoming some- what thinner again at the valve surface. As the outer margins of the valve mantle are straight and parallel, the variable thickness of the wall makes the inner surface appear undulate from which the name of the taxon is derived. The ornamentation of the valve mantle consists of straight, parallel rows of puncta, about 16 in lOu, with complex substructure and apparently subtended by chambers. A conspicuous corona of slime pores is present on the valve mantle about one-third of the distance between the valve surface and the girdle margin. These pores enter the interior of the frustule through a small nipple-like projection on the interior wall. Ornamentation of the valve surface consists of anastomosing radial striae of varying lengths hav- ing the same structure as the striae of the valve margin. A small, struc- tureless, area is present at the center of the valve. In some specimens the ornamentation of the wall surface spirals around the midpoint. This entity is very rare in plankton collections from Lake Michigan. It appears that the specimens found are derived from populations that exist in periphyton communities in relatively deep water (50+m) . As Hustedt (1927) points out, the reported modern distribution of this species is primarily tropical, although it is present in tertiary deposits throughout central and northern Europe. Its occurrence in the deep waters of Lake Michigan is some- what puzzling, although it should be pointed out that a morphologically very similar entity, Cyolotella fottii Hust. (Fott, 1935; Jurilj , 1954), has been reported from similar habitats in Lake Ohrid. In life the colonies are attached to rocks or other solid substrates by slime strands arising from the pores of the terminal cell of the colony. Both the attachment to the substrate and the attachment of the cells to one another is tenuis so that individual free cells are often found. Coll: 973. Melosiva undulata var. novmanii Arnott ex V. H. Melosiva undulata var. novmanii Arnott ex Van Heurck, Syn. Diat. Belgique, pi. 90, fig. 7. 1882. In this entity the interior surface of the valve mantle is polygonal. The interior opening of the slime pores occurs at the angles of the polygon and the nipple-like structure surrounding the pore tends to be more highly developed than in the nominate variety. On the basis of the limited number of specimens we have observed from Lake Michigan it appears that the spiral arrangement of the valve ornamentation is more common in this entity than it is in the nominate variety, although both types of ornamentation are found in both taxa. 110 Very rare in plankton collections from Lake Michigan. It is suspected that the specimens observed are derived from deepwater periphyton communities , The reported distribution of this entity is more northern than that of the nominate variety (Hustedt 1927). ~341 MEUNDUV* TCT KG CF STATIONS 2 ( 1573 6CC1967 Melosiva vavians Ag. Melosiva varians Agardh, Syn. Alg., p. 78. 1817. Cells cylindrical, joined by the valve faces into long, closely appressed colonies. Individual valves of specimens from Lake Michigan 10-33u in dia- meter, 8-13u high (valve mantle). Valve mantles parallel, valve surfaces only slightly convex, therefore forming an inconspicuous pseudosulcus. The sulcus and associated structures are entirely lacking in this species. The walls of the frustule are of similar thickness throughout. The ornamentation of both the valve surface and the valve mantle is composed of very fine puncta which can barely be resolved with the light microscope under optimum optical condi- tions. In normal preparations the wall appears homogeneous. This species is occasionally found in nearshore plankton collections from Lake Michigan, especially in areas that have been appreciably eutro- phied. Its reported distribution indicates that it reaches its greatest abundance in highly eutrophic waters. It apparently finds its primary habi- tat in benthic communities although it is not uncommon in the plankton of highly polluted lakes and streams. 342 MEVARIAN TOT NC OF STATI ONS 28 (46762 ( 1547 EV PS. 1 18MR1938 20C1967 G. 04411 ) 0.03992 ) 1571 1546 GS19 LU 1 60C1967 20C1967 0. 00527 ) C.G1000 ) 1544 1520 eu l F0 1 20C1967 18SE1967 C.0C477 1 C. 02829 ) ( 1521 1 1526 SH 1 HO 1 18SE1967 20SE1967 1.10778 1 0.CC569 ) 1522 1529 BH 1 Kk, 1 18SE1967 20SE1967 0.00365 ) 0.01199 ) 1523 1530 RA 1 FR 1 19SE1967 24SE1967 C. 02768 ) C. 35003 ) ( 1531 ( 1476 GH 1 US 7 25SE1967 79MY1967 2.97549 I 0.66142 ) 1550 1427 MR 1 LU 2 50C1967 29MY1967 1.58592 ) 3.C9927 1 1428 1417 KU 2 HO 2 29HY1967 22KY1967 C. 25310 ) C.C3365 ) ( 1418 C L4O0_ SH 2 SB 7 22MY1967 6MY1967 1.69518 ) 0.00596 ) 1350 1354 BH 2 GH 2 19AP1967 25AP1967 C. 15418 ) 0. 00690 1 1401 1429 *C 2 hi 2 6HY1967 29KY1967 C.C2940 ) C. 14864 ) I 1406 GB 2 13KY1967 0.01617 ) 1422 GA 2 23MY1967 0.05620 ) 1423 HA 2 25MY1967 C.CC428 ) Species inoevtae sedis Melosiva sp. #1. 343 MFSPECOA TCT NO OF STATIONS 36 ( 1229 D 5 14MY1964 G.C5921 ) 1230 E 2 16KY1964 0.04149 1 1 1231 E 3 16MY1964 C. 34243 ) ( 1232 1 1241 E 5 E 2 16MY1964 13JN1964 0.40697 ) 0.C0739 ) 1235 1242 C 7 E 3 16JN1964 13JM964 0.00565 ! C. 00899 ) < 1237 1 1257 C« 2 E 3 8JN1964 14JL1564 0.00516 ) C.CC479 ) < 1262 J_ 13JJ3 B 3 A 6 17AU1964 3*Y1S67 0.00840 ) 0.09667 ) 1281 1372 E 3 C 5 16SE1964 5MY1967 0.00785 ) C. 02128 ) ( 1346 ( 1375 C 7 E 3 21AP1967 7HY1967 C. 00534 ) C.CC481 ) ( 1416 1 1512 E 5 E 3 28MY1967 1SE1967 0.01749 ) 0.01571 ) 1435 1537 C 7 E 3 13JN1967 24SE1967 0.00631 ) 0.02588 ) ( 1450 ( 1379 C 5 GS 3 16JL1967 9MY1967 C.0C381 ) C.0C619 ) ( 1380 J_1385 GS 4 GS 9 9MY1967 10MY1967 0.01513 1 0.00942 ) 1381 1386 GS 5 GS10 10MY1967 12MY1967 0.02147 ) 0.01724 1 ( 1384 ( 1389 GS 8 CS13 10WY1967 12MY1967 C. 00739 ) C.0C774 ) ( 1390 1 1394 GS14 GS18 12KY1967 13MY1967 0.01174 I 0.00172 ) 1391 1395 GS15 GS19 12MY1967 13MY1967 0.02873 ) 0.01644 ) 1 1393 ( 1554 GS17 GS 1 13MY1967 30C1967 C. 01096 ) C.0C712 1 ( 1351 HI 2 21AP1967 0.01241 ) 1401 K0 2 6HY1967 0.02352 I < 1400 SB 2 6MY1S67 C.1C722 ) 111 Genus Mevidion Agardh Agardh, Syst. Alg., p. 14. 1824. Members of the genus Meridian find their primary habitat in periphyton communities. Only occasional specimens are found in plankton collections from Lake Michigan and these are undoubtedly derived from shoreline sources. Mevidion oivoulave (Grev.) Agardh Eohinella oivoulavis Greville, Mem. Vernerian Nat. Hist. Soc, 4:213, pi. 8, fig. 2. 1822. Mevidion oivoulave (Grev.) Agardh, Consp. Crit. Diat., pt. 3, p. 40. 1831. 344 MRCIRCUL TCT NO OF STATIONS 21 146743 ( 1394 EV esi's 20JN1937 13MY1967 0.00426 1 0.O0344 ) 1341 1569 A 3 GS17 19AP1967 50C1967 0.00108 ) 0.00297 ) 1348 1571 E 5 GS19 23AP1967 60C1967 C. 00137 ) C.0C059 ) ( 1544 ( 1426 KU 1 MS £_ 20C1967 29MY1967 0.00238 ) 0.01O30 ) 1522 1427 BH 1 LU 2 18SE1967 29MY1967 C. 00365 ) 0.01211 ) 1550 1417 KR 1 HO 2 5CC1967 22MY1967 C. 02478 ) C.C1122 ) I 1418 -_I_J£Q0_ SH 2 SB Z 22MY1S67 6HY1967 0.03110 ) 0.02383 ) 135C 1354 BH 2 GH 2 19AP1967 25AP1967 C. 00881 ) 0.00518 ) 1401 1403 KG 2 CA 2 6MY1967 10MY1967 14MY1967 C.CC588 ) C. 03923 ) ( 1404 MQ 2 10MY1967 0.03811 ) 14C5 ES '2 12MY1967 C. 00645 ) 1407 SM 2 C.CC597 1 Mevidion oivoulave var. oonstviotum (Ralfs) V. H. Mevidion oonstviotum Ralfs, Annals Mag. Nat. Hist., 12:458, pi. 18, fig. 2. 1843. Mevidion oivoulave var. oonstviotvm (Ralfs) Van Heurck, Syn. Diat. Belgique, p. 161, pi. 51, figs. 14-15. 1885. 345 MRCIRCVC TOT NO Of STATIONS ( 1550 < 1354 MR 1 GH 2 50C1967 25AP1967 0.01239 ) 0.01036 ) ( 1428 1 14C4 HU 2 MQ 2 29MY1967 10MY1967 0.00301 ) 0.02541 ) ( 1350 1 1405 BH ES 19AP1967 I2MY1967 C.OC220 ) C.CC645 ) Genus Navioula Bory Bory, Encyclop. Methodl., p. 562. 1824. Navioula is by far the largest of the diatom genera occurring in fresh water. Its members occupy a diversity of habits ranging from terrestrial to occurrences in the plankton of large lakes. Probably none of the freshwater species is euplanktonic although a number are successful facultative plank- tonts and are regularly noted in plankton collections, even those from off- shore areas. Navioula abiskoensis Hust. Navioula abiskoensis Hustedt, Arch. Hydrobiol., 39:118, fig. 36. 1942. Coll: ANSP Schulze A70. Navioula aboensis (Cleve) Hust. Navioula tovneensis var. aboensis Cleve, Acta Soc. Fauna Fl. Fennica, 8(2):33, pi. 2, fig. 7. 1891. Navioula aboensis (Cleve) Hustedt, Bot. Not., 105:407, figs. 131-132. Coll: 1800. 1952. 112 Navicula acceptata Hust. Navicula aaaeptata Hustedt, Arch. Hydrobiol., 4.3:398, pi. 38, figs. 66-67. 1950. 1FE1881 0.00978 1 (46768 EV 16MR1938 C. 01470 ) ( 1304 F 1 HOC 1964 C.CC247 ) ( 1305 F 2 U0C1964 60C1967 0.00345 ) 0.00575 ) ( 1340 ( 1544 C 7 MU 1 28KR1967 20C1961 0.00073 ) C. 00715 1 ( 1555 ( 1546 CS LU 2 1 30C1967 2CC1967 C. 00353 ) C. 01000 ) ( 1527 I 1417 TR 1 Hfl ? 20SE1967 2 2MY1967 0.01258 1 0. OS 3 74 X. ( 1529 ( 1350 KM 1 BH 2 20SE1967 19AP1967 0. 01199 ) 0.00661 I ( 1550 ( MR 1 50C1967 C. 01239 ) Navicula aooomoda Hust. Navicula accomoda Hustedt, Arch. Hydrobiol., 43:446, pi. 39, figs. 17-18. 1950. 347 NAACCCMM TCT NO OF STATIGNS 1 L 1350 BH 2 19AP1967 C.CC220 ) ( Navicula ambigua Ehr. Navicula ambigua Ehrenberg, Abh. Akad. Wiss. Berlin, 1841:129, pi. 2, fig. 11(9). 1843. 37C NACUSPVA TOT NO OF STATIONS 1 T~f53l GH~1 25SE1967 0.0C845 ) T Navicula amphibola var. pevvievi Per. and H£rib. Navicula amphibola var. pevvievi Peragallo and Heiribaud in: H£ribaud, Foss. Diat. Auvergne, Pt. 1, p. 25, pi. 7, fig. 11. 1902. Coll: ANSP Schulze A70. Navicula amphicevos Kutz. Navicula amphiceros Kutzing, Bacill., p. 95, pi. 3, fig. 39. 1844. Coll: 1056. Navicula anglica Ralfs Navicula anglica Ralfs in-. Pritchard, Hist. Infus., 4th ed., p. 900. 1861. TTT NO OF STATIONS 16 r.H 23NG1945 0.00065 ) (46917 CH 12JA1946 0.00028 ) (46920 CH 200E1946 C. 00092 ) (46905 (46907 CH CH JA1947 JL1947 0.00123 > 0.00099 I (469C9 (46758 CH EV MR 1947 5JN1937 0.00455 ) C. 02496 ) (469C6 (46764 CH EV MY1947 17JL1937 C. 00066 ) C. 05641 ) (4675 7 (46752 EV EV 25JU937 15SE1937 0.00963 1 0.13061 » (46747 (46768 EV EV 1AU1937 16MR1938 0.00495 I C. 01470 1 (46763 (46762 EV EV 23AU1937 18MR1938 C. 04058 ) C.C2206 ) (46761 EV 27MY1938 0.00273 ) ( 349 NAANGLIO TCT NC CF STATIONS 6 (46919 ( 1566 CH GS14 5JN1947 50C1967 C. 00303 ) 0.O0183 ) (46S22 ( 1550 CH MR 1 21AU1947 50C1967 C.00097 ) 0.0 1.239 ) (46747 ( 1404 EV f& 2 1AU1937 10MY1967 C.0C743 ( 0.02541 ) Navicula anglica var. signata Hust. Navicula anglica var. signata Hustedt, Ber. Deutsch Bot. Ges., 61(5) :287. pi. 8, fig. 26. 1943. 113 350 NAANGLVS TCT NC CF STATIONS (46915 CH 20FE1946 0.00569 I (46758 EV 5JN1937 C. 00357 ) 46747 EV 1AU1937 C.CC248 ) (46760 ( 1304 EV F 1 22SE1537 11001564 0.00492 ) 0.00247 1 (46767 ( 1388 EV GS12 270C1937 12f»Y1567 C. 00387 ) C. 00603 ) 1264 1565 C> 1 CS13 10AU1964 50C1967 C.CC193 ) C.C5578 ) ( 1569 ( 1526 GS17 HO 1 50C196 7 20SE1967 0.00149 1 0.00569 1 ( 1546 ( 1527 LU 1 TR 1 20C1967 20SE1967 0.00500 1 0.00629 ) 1521 1528 SH 1 SB 1 18SE1967 2CSE1967 C. 00577 1 C.C1444 ) ( 1545 ( 1423 WL 1 WA 2 20C1967 25MY1967 0.01351 1 0.00428 ) ( 1417 ( HO 2 22MY1967 0.00374 1 14C3 CA 2 10MY1967 C.C1308 1 Navioula anglioa var. subsalsa (Grun.) Cleve Navioula tumida var. subsalsa Grunow, Verh. Zool.-Bot. Ges. Wien, 10:537, pi. 4, fig. 43b. 1860. Navicula anglioa var. subsalsa (Grun.) Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 27(3) :22. 1895. .3.5.1 NAANGLVA TCT KC OF STATIONS 2 (46758 EV 5JN1937 0.00357 ) (46757 EV 25J11937 0.00481 ) ( _ Navioula angusta Grun. Navioula angusta Grunow, Verh. Zool.-Bot. Ges. Wien, 10:528, pi. 5, fig. 19. 1860. 497 NASPFCCT T(1T NH (IF STATIONS 4 _ (4677(1 FV 9JI1937 0.OC596 I (46766 EV 14DE1938 0.01584 ) < 1536 E_2 24SE1967 C00273 1 ( 1394 GS18 13MY1967 0.00172 ) ( Navioula aurora Sov. Navioula aurora Sovereign, Trans. American Micr. Soc, 77(2) :120, pi. 3, figs. 29-31. 1958. J3-5_2„ NAAURORA TCT NO OF STATIONS (469 2 C CH EV EV 20DE1946 17JL1937 22SE1937 0.00031 ) (46758 EV 5JM1937 0.00357 ) (46771 EV 1WN1937 C.CC238 ) (46764 (4676C 0.00806 ) O.0C492 1 (46757 (46762 EV EV 25JL1937 18MR1938 0.00963 ) 0.02206 ) (46747 (46756 EV EV 1AU1937 27AP193E C.0C248 ) C.CC168 ) ( 1427 LU 2 ES 2 2SMY1967 12MY1967 0.01211 ) 0.00645 ) ( 14C0 ( SB 2 6KY1967 C. 00596 ) ( 1404 CO 2 10MY1967 C. 01270 ) Navioula baoillum Ehr. Navioula baoillum Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:418, pi. 4(5), fig. 8. 1843. 353 NARAf.HI TCT KC OF STATIONS 5JN1937 0.0C357 I (46757 24SE1937 0.00471 I ( 1392 12MY1967 0.00308 1 50C1967 C. 01014 ) Navioula baloanioa Hust. Navioula baloanioa Hustedt, Arch. 1945. Hydrobiol., 40:928, pi. 40, figs. 12-15. 354 NABALCAN 1CT NO OF STATIONS 29 (46910 CH CH 0C1945 19AP1946 0.00218 ) 0.00107- ) (46521 (46924 CH CH 23N01545 10PY1946 C. 00129 ) C. 00071 ) [46915 (46923 CH CH 2CFE1946 22NC1946 0.0C569 I C.CC437 ) (4692 0 CH CH 20DE1946 HY1947 0.OC062 1 0.00066 ) (46909 (469C7 CH CF MR1947 JL1947 0.00911 ) C.C0148 ) (46916 (46922 CH CH 4MY1947 21AU1S47 C.CCC34 ) C. 00242 ) (46758 EV 5JN1937 I7JL1937 0.24249 ) 0.13699 1 (46743 (46757 EV EV 20JN1937 25JL1937 0.00428 ) 0.02889 ) (4677C (46747 EV EV 9JL1937 1AU1937 C.0C596 ) 0.02723 ) 146763 EV 23AU1937 22SE1537 0.12175 1 0.0C985 ) (46765 (46750 EV EV 30AU1937 24SE1937 0.01115 ) 0.02828 ) (46752 (46767 EV EV 15SE1937 270C1937 C. 04354 ) C.C116C I (46749 (46766 EV FV 12MR1938 14nF19?P 0.01214 ) r.(115R4 1 (46762 < 1544 EV HI 1 18MR1938 2CC19A7 0.13233 I 0.00?38 ) (46761 ( EV 27HY1938 C.0C273 ) 114 Navioula bryophila Peters. Navioula bryophila Petersen, Bot. Iceland, Vol. 2, p. 388, fig. 13. 1928. 355 NARRYCPH TCT NO OF STATIONS (46917 CH 12JA1946 0.00028 ) 1 1285 19AP1967 0,00441 ) ( Navioula oapitata Ehr. Navioula oapitata Ehrenberg, Infusionsthierchen, p. 185, pi. 13, fig. 20. 1838. 356 NACAPITA TCT NO CF STATIONS 18 (•46759 ( 1279 ev E 1 SH 1 MR 1 SH 2 KW 2 19MY1938 0.0C338 1 16SE1964 0.0C785 ) 1236 1286 C" F 1 2 8JN1S64 15SE1964 0.00175 ) 0. 01095 ) 1274 1341 0 1 A 3 '" CH l"'~ hO 2 17SE1964 19AP1967 25SE1967 22MY1967 C. 00469 ) C.C0108 1 ( 1521 ( 1550 18SE1967 0.01154 ) 5CC1967 0.03717 ) 1526 1426 MO MS 1 2 20SE1967 29NY1967 C. 00569 1 C. 02100 ) 1531 1417 C.0C845 ) C.0C374 1 ( 1418 ( 1352 22MY1967 0.C3110 ) 21AP1967 0.00859 ) 1350 1407 8K SM 2 2 19AP1967 14MY1S67 C. 01982 I C.CC597 ) 1402 1406 IR 2 G8 2 6MY1967 13MY1967 C.C1083 ) C.C0270 ) Navioula oapitata var. hungarioa (Grun.) Ross Navioula hungarioa Grunow, Verh. Zool.-Bot. Ges. Wien, 10:539, pi. 3, fig. 30. 1860. Navioula oapitata var. hungarioa (Grun.) Ross, Natl. Mus. Canada Bull., 97 (2): 192. 1947. 357 NACAPIVH TCT NC CF STATIONS 3_ (46743 EV 20JN1937 0.0C856 ) ( 1253 16JL1964 C.C0228 ) ( 1550 5CC1967 C.C1239 ) Navioula oapitata var. luneburgensis (Grun.) Patr. Navioula hungarioa var. luneburgensis Grunow in: Mojsisovics and Neumayer, Beitr. PalHont. (Jsterreich-Ungarns, Vol. 2, pt. 4, p. 156, pi. 30, figs. 43-44. 1882. Navioula oapitata var. luneburgensis (Grun.) Patrick in: Patrick and Reimer, Acad. Nat. Sci. Philadelphia Monogr., 13:537, pi. 52, fig. 4. 1966. ,358 — NACAPXVJ^TCT NC_0±JLLATIChS 25 I46915_ _£ii_ 20FE1946 (46922 ( 12i5_ CH D 2 21AU1947 17SE1964 0.00097 ) 0 .00645 ) . E 2 .JiiL3_ ( 1374 ._!_. 156.5 I 1520 F0 1 ( 1428 M1L_2_ ( 1349 CI 2 L.1A23 MA_2_ 7MY1S67 5GC196 7 18SE1967 79MY1967 0.00299 ) 0.182 54 J._ 0.0094 2 ) 0.00301 ) 19AP1967 ._-25JUOS6J_ 0.00359 ) „0.,OC4_2.8. ) ._ 46764 1345 EV C 5 17JL1937 25AP1967 C.0O806 I C. 00195 ) 1388 _1574 152 7 1354 GS12 GS22 12MY1967 6CC1967 0.01207 ) 0.00575 ) TP 1 GH 2 20SE1967 25AP1967 C. 00629 ) 0.00173 ) 1420 1270 1346 F I C 7 1561 1546 CS 9 IU 1 15 50 1403 CP. 1 CA 2 Navioula oapsa Hohn MR194? 50C1567 10MY1967 10AU1964 C. 21AP1967 C. 4CC196 7 C. 20C1967 C. CC272 ) 0C134 ± CC587 ) 0 2001_ ) C2478 ) C1308 ) 01735 1 Navioula oapsa Hohn, Trans. American Micr. Soc, 80(2) :161, pi. 1, fig. 1961. 20. 4-54 NASBACH T01 NC OF STATIONS 5JN1947 0.00152 ) 17JL1937 C. 00806 ) 6PY1967 0.00588 I C.C1270 ) Navioula oaroliniana Patr. Navioula oaroliniana Patrick, Proc. Acad. Nat. Sci. Philadelphia, 111:107, pi. 7, fig. 11. 1959. Coll: 1741. 115 Navioula oerta Hust. Navioula oerta Hustedt, Arch. Hydrobiol., 40(4) :924, pi. 42, figs. 2-3 1945. 359 NACFBTA ICT NO OF STATIONS 6 ( ISA'S Ul I 20C1967 ' 0.00676 ) 1 1550 MR 1 50CX967 C. 01239 ) ( X426 >S 2 29MV1967 C.01C50 I ( 1351 MI 2 21AP1967 0.00310 ) ( 1350 6H 2 19AP1967 0.00220 ) ( 1404 HO 2 10MY1967 0.61270 I Navioula olementis Grun. Navioula olementis Grunow in: Mojsisovics and Neumayer, Beitr. Palaont. Osterreich-Ungarns, Vol. 2, pt. 4, p. 144, pi. 30, fig. 52. 1882. 361 MCL01DC TCT NO OF STATIONS 2 (T388 ~GS12 12MYl<67 0.00603 ) ( 1527 TR 1 20SE1967 0.00629 ) ( Navioula olementis var. linearis Bander Navioula olementis var. linearis Bander ex Hustedt in: A. Schmidt, Atlas Diat., pi. 403, fig. 43. 1936. 36C NAClEfVL TCT NO OF STATIONS 2 I 1550 MR 1 50C1967 0.01239 ) ( 1428 MU 2 29HY1S67 C. 00301 ) ( Navioula olementis var. quadristigmata Mang. Navioula olementis var. quadristigmata Manguin, Rev. Algol., Nouv Ser 5(4):274, pi. 2 (J. pi. 27), fig. 2. 1961. 456 NASCLEME TCT NO OF STATIONS 2 (46920 CH 20CE1946 0.00062 1 (46767 EV 270C1S37 0.00387 1 ( Navioula oooooneiformis Greg. Navioula oooooneiformis Gregory ex Greville, Annals Mag. Nat. Hist., Ser. 2, 15:256, pi. 9, fig. 6. 1855. 362 NAC0CCCN 1CT NC CF STATIONS 5 ( 1565 GS13 50C1967 C. 02026 ) ( 1549 MQ 1 40C1967 0.01370 ) ( 1550 KR 1 5CC1967 0.01239 1 ( 1553 SC 1 6QC1967 0.00734 1 { 1407 SM 2 14MY1967 0.00597 ) < Navioula oonfervaoea (Kutz.) Grun. Diadesmis oonfervaoea Kutzing, Bacill., p. 109, pi. 30, fig. 8. 1844. Navioula oonfervaoea (Kutz.) Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 14, fig. 36. 1880. 363 NACCNFER TCT l\C CF STATIONS 2_ 1550 MR J 50C1967 0.04956 I I 1350 BH 2 19AP1567 0.00441 I ( 116 Navieula aostulata Grun. Navioula oostulata Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. if * Handl., Ny Foljd, 17 (2): 27. 1880. 364 NACCSTUL KT NC OF STATIONS (46921 CH CH CH 23N01945 22N01946 4MY1947 0.0C517 ) 0.0C874 ) 0.0C238 ) (46917 CH 12JA1946 0.00055 1 (46924 CH 10MY1946 MR1947 JL1947 C.CC635 1 (46923 (46916 (46920 (46919 CH CH 20DE1946 5JIU947 C. 0006.2 1 0.C0607 ) (469C9 (46907 CH CH C.0C9U ) 0.00148 ) (46922 (46745 CH EV 21AU1947 3JL1937 0.00582 ) 0.02090 ) (46758 (46764 EV EV 5JN1937 17JL1937 0.05349 ) 0.01612 ) (46743 (46757 (46752 (46748 EV EV EV EV 20JN1937 25JL1937 15SE1937 130C1937 16M.R193 8 27AP1538 C. 01285 1 C. 02407 ) (4674 7 14675C EV EV EV EV 1AU1937 24SE1937 270C1937 18MU93B 0.02723 ) 0.C1885 ) 0.00774 ) 0.06617 ) (46763 (46744 (46749 (46751 EV EV 23AU1937 6CC1937 C. 10146 ) C. 00488 1 C. 08707 ) C.C427C ) (46767 (46762 EV EV 12MR1938 30^1938 C.C2427 ) 0.01117 ) (46768 (46756 EV EV C.C5880 ) C.GC168 ) (46759 EV 19MY1938 0.01013 ) (46761 EV 27MY1938 C. 00545 ) ( 1274 0 1 17SE1964 C.CC469 ) Navieula oryptooephala Kutz. Navioula oryptooephala Klltzing, Bacill., p. 95, pi, 3, figs. 20, 26. 1844. 365 NACRYPTC TCT KC OF STATIONS 35 (46915 (46744 CH EV A 4 _.. G.SIf GS 5 GS19 2CFE1946 60C1937 19SE1967 J.2MYJ.967 40C196 7 6CC.196 7 0.00569 ) O.0C975 ) 469C6 1240 CH 0 6 GS11 GS18 GS10 GS28 KY1947 10JN1964 12KY1967 13KY1967 5GC1967 6CC1'=67 0.00066 ) C. 00307 ) 46752 1241 EV E 2 15SE1937 13JN1964 C.C2177 ) 0.00148 I t_L392 0.00308 ) 0.00396 ) C.0C059 ) 1387 1394 1562 1575 C. 00792 ) 0.00172 ) 1389 1397 GS13 GS21 12MY1967 13MY1967 50C1967 C.0C516 ) C.CC196 ) ( 1571 C. 00247 ) C. 00129 ) 1565 1546 GS13 IU 1 C.C1521 ) ( 1522 t .1531 .... ( 1553 -LI 3 50.. BH 1 GH 1 _ SG 1 .. BJL2 SB 2 fO 7 18SE1967 ...25SE1967 60C196 7 19AP1967 6MY1967 10MY1967 0.0C365 ) 0.01691 ) 0.00734 ) 0.07048 ) 0.00596 ) O.C127C ) 1527 1545 1427 14C1 1352 14C7 TR 1 ML 1 LU 2 MO 2 20SE1967 2CC1967 29KY1967 6MY1967 0.00629 ) 0.03379 ) 1530 1550 FR 1 ► R 1 24SE1967 50C1967 C. 16002 1 C.C9912 ) 0.01211 ) C. 01764 ) 1417 1402 HO 2 TR 2 22MY1967 6MY1967 25AP1967 C.0C748 } ( 1404 Kk 2 SM 2 21AP1S67 14MY1967 0.00859 ) 0.00597 1 1354 GH 2 0.00173 ) Navioula oryptooephala var. intermedia Grun. Navioula oryptooephala var. intermedia Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 8, fig. 10. 1880. 366 . .NACJlP_V_I_tj:T...MC_OE_SJJ*I.LCNS 27_ 1383 15J3_ GS 7 -GS.2.L. 1547 US 1 15.45. ML _L 1550 MR 1 1417 Hfl ? 10MY1967 6CC1967 0.00267 ) ...0,00112 ) 20C1967 20C1967 0.00798 1 _0jl01379 1 1401 CO 2 .1354 Gtt_2_ 50C1967 22MY1967 0.35931 ) C. 01122 1 6MY1967 75AP1967 0.01176 ) 0.0C173 1 1388 ..157.4_. 1522 .15 5 1_ GS12 GS22 12MY1967 60C1967 BH 1 ES 1 18SE1967 50C1967 0.00603 I C. 00575 ) C. 03465 ) 0. 00799 ) 1402 1407 TR 2 29MY1967 C. 05249 ) 22MY1967 0.01555 I 6MY1S67 14MY1967 C. 02707 ) C. 01791 ) 1571 1544 GS19 FU 1 1526 1552 « 1 SM 1 100C1967 C.CC718 1 60C1567 C.OC059 I __20C1967 0.0C477 I 1351 1350 1400 14C6 PI 2 BH 2 2CSE1967 6CC1967 SB 2 GB 2 21AP1967 19AP1967 C.CC56S ) C.CC660 ) 6MY1967 13HY1967 C.0C621 I C.C3524 ) 0.04765 I C.C1078 ) Navioula oryptooephala var. lanoettula (Schum.) Grun. Navioula lanoettula Schumann, Schrift. K. Phys.-Okonom. Ges. Konigsberg, 5il6, pi. 2, fig. 34. 1864. Navioula oryptooephala var. lanoettula (Schum.) Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 8, fig. 11. 1880. 367 NACRYPVI TfiT Mr fIF STATirm J_L219__ E l_ 16SE1964 0.0C393 1 Navieula oryptooephala var. veneta (Kutz.) Rabh. Navioula veneta Kutzing, Bacill., p. 95, pi. 30, fig. 76. 1844. Navioula oryptooephala var. veneta (Kutz.) B.abenhorst, Fl. Europaea Alg., Sect. 1, p. 198. 1864. 117 -J6J NACRVPVV TOT NC CF STATIONS 27 46919 1344 1382- 1565 1546 CH C 3 GS 6 5JN1947 0.00152 I 1527 1530 GS13 IV 1 25AP1967 10MY1967 00165 I 0C278 ) TR 1 _FR I 50C1967 20C1967 00507 ) 04502 ) 1351 1400 20SE1967 24SE1967 22013 ) 01000 ) HI 2 SB 2 21AP1567 0. 6MY1967 0. 00310 ) 01191) 1346 1554 C 7 GS 1 1574 1521 GS22 SH 1 21AP1967 3CC1967 1528 1545 SB HL 60C1967 18SE1967 0.00134 ) C. 00356 ) 20SE1967 20C1967 0.04315 ) 0.00577 ) 0.01444 ) 0.21623 ) 19AP1967 0.07929 I 1348 1558 E 5 GS 5 1544 1526 EC 23AP1967 4CC1967 1529 1550 20C1967 20SE1967 C. 00137 ) C.CC396 1 KW 1 >8 1 1401 1407 HO 2 SH 2 20SE1967 50C1967 C.0C238 ) 0.04551 ) 6MY1967 14HY1967 C. 08394 ) C.16107 I C. 01176 ) C.C2986 ) Naviaula auspidata (Kutz.) Kutz. Frustulia auspidata Kutzing^Linnaea, 8:549, pi. 4, fig. 26. 1833. Navioula auspidata (Kutz.) Kutzing, Bacill. 1844. p. 94, pi. 3, figs. 24, 37. 369 NACUSPID TCT NO Of STATIONS 15SE1964 0.00500 ) ( 1369 18SE1967 0.00471 ) 4HY1967 0.00373 I Naviaula auspidata var. major Meist. Naviaula auspidata var. major Meister, Beitr. Kryptog.-Fl. Schweiz, 4(1):134, pi. 20, fig. 10. 1912. 371 NACUSPVM TCT NC OF STATIONS ( 1549 HO 1 40C1967 0.0137C ) ( Naviaula deaussis 0str. Naviaula deaussis 0strup, Danske Diat., p. 77, pi. 2, fig. 50. 1910. 372 NADECUSS TOT NO OF STATIONS I 1402 22MY1967 0.01122 ) 6MY1967 0.00541 I ( 1352 (46910 (46915 CH CH 0C1945 20FE1946 0.00109 ) 0.01138 ) (46S21 (46514 CH CH 23N01945 19AP1946 C. 00065 ) 0.00320 ) (46917 (46924 CH CH 12JA1946 10MY1946 C.CC055 ) C.0C141 ) (46923 (46916 CH CH 22N01S46 4KY1947 0.00874 1 0.00102 ) (46S20 (469C6 CH CH 20DE1946 MY1947 C. 00062 1 0.00133 ) (46909 (46919 CH CH MR1947 5JN1947 C.C1821 ) C. 00303 ) (46907 146743 CH EV FV JL1947 20JN1937 25JU937 30AU1937 C. 00099 ) Q^0Q42_8 } 0.03370 1 0.00558 ) (46922 (46770 CH EV 21AU1947 9JL1937 0.00145 1 C. 01193 ) (46758 (46764 EV EV 5JN1937 17JL1937 C.C3923 ) C. 02417 ) (46757 146765 (46747 (46752 EV EV 1AU1937 15SE1937 C. 00990 ) 0.04354 ) (46763 (46760 EV EV 23AU1937 22SE1S37 C. 12175 ) C.0C492 ) (46750 146749 EV EV EV C> 1 24SE1937 12MR1938 0.01885 ) 0.01214 ) (46744 (46768 EV EV 60C1937 16HR1S38 0. 00488 ) 0.04410 ) (46748 (46751 EV EV 130C1937 30MR1938 C. 02135 ) 0. 01117 1 (46759 < 1264 19MY1938 10AU1964 0.00338 ) 0.00193 ) (46761 ( 1341 EV A 3 27HY1938 15AP1967 0.00545 1 0.00325 ) ( 1240 ( 1504 0 A 6 3 10JN1964 28AU1967 C.0C153 ) C.0C247 ) ( 1540 ( 1574 ( 1546 C 5 GS22 LU 1 BH 1 40C1967 60C1967 20C19o7 18SE1967 0.00496 ) 0.00288 ) U.U3UU1 1 0.02735 ) ( 1541 ( 1544 1 1520 ( 1527 E HU HO TR 2 1 1 110C1967 20C1567 18SE1V67 20SE1967 C. 00532 1 C. 00238 ) 0.00471 ) 0.08176 I ( 1565 < 1547 ( 1521 ( 1528 GS13 PS 1 SH 1 SB 1 50C1967 20C1967 18SE1967 20SE1967 C.0C507 1 C.01S9T 1 C. 00577 ) C. 04332 ) ( 1530 1 1428 FR MU 1 2 24SE1967 29MY1967 0.01000 ) 0.00603 ) ( 1545 ( 1426 ML MS 1 2 20C1967 29HY1967 0.16893 ) 0.03150 ) ( 1550 ( 1427 HR LU 1 2 50C1967 29MY1967 0.04956 1 C. 03632 ) 14MY1967 0.00597 ) ( 1422 KW 2 21AP1967 Q.CQ859 ) ( 1404 23MY1967 0.00511 I ( ►0 2 10HY1967 C. 01270 ) Naviaula diluviana Krasske Naviaula diluviana Krasske, figs. 2a-b, pi. 3. 1933. Zeitschr. Geschiebforsh. , 9 (2): 90, pi. 2, 374 NADILUVI 1CT NO OF STATIONS 12MY1967 0.00603 ) { Naviaula elginensis (Greg.) Ralfs Pinnularia elginensis Gregory, Quart. J. Micr. Sci., 4t9, pi. 1, fig. 33, 1856. Naviaula elginensis (Greg.) Ralfs in: Pritchard, Hist. Infusoria, 4th ed., p. 902. 1861. 375 NAELGINE TCT NC CF STATIONS 19AP1967 0.00220 ) (_ 118 Navicula exigua var. aapitata Patr. Navicula exigua var. aapitata Patrick, Farlowia, 2(2):179, pi. 1, fig. 8. 1945 . -37_l___NA£_)£. _C F STATIONS 13. . _E.V._ (46758. (46761 EV t 1389 GS13 ( 1574 GS22 ( -14£jS («fl_2_ ..5JN19J7 _0. 00713 ) 27KY1938 0.0C273 I 12NV1S67 0.00258 1 6CC1967 .iCKY1967_ (46768 ( 1386 ( 1394 GS10 GS18 _16HR1938_ 0.01470 ) (46762 0.00575 ) -JL-.il 2 7C _j_ 12MY1967 13WY1967 0.00237 ) 0.00172 ) 1 1388 (1565 50C1967 0.01239 I ( 1354 CS12 CS13 _L8NR1938_ __Ci04«Il_ J 12MY1967 50C1967 C. 01810 ) C.C1014 1 25AP1967 C. 00173 ) Navicula farta Hust. Navicula farta Hustedt, Bot. Not., 105:408. 1952. 32S NAFARTA TOT NO L'F STATIONS -_5C.C.L9_6J___0.^i39j_L: Navicula fracta Hust. Mavicula fracta Hustedt in: Rabenhorst, Kryptog.-Fl. Deutschlands, 7(2)1: 127, fig. 1259. 1961. -3J3J2 — NAFRAC.TC Tr.T nn nc STtrina^ (46763 1 1560 _£JL GS 8 40C1967 0.00472 1 ( 1565 23AU1937 0.02029 I I 1300 F 1 130C1964 C. 00358 ) ( 1394 GS1B 50C1967 0.0050^~) ( 1422 GA 2 13HY1967 C.0C172 1 23KY1967 C.0C511 ) Navicula gastriformis Hust. Navicula gastriformis Hustedt in: A. Schmidt, Atlas Diat.. pi 398 fies 17-19. 1934. ' B 381 NAGASTRI TOT NO OF STATIONS ( 1396 GS20 13MY1967 0.0C074 ) ( Navicula gastrum (Ehr.) Kiitz. Pinnularia gastrum Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841' 421 pl. 3(7), fig. 23. 1843. ' ' Navicula gastrum (Ehr.) Kiitzing, Bacill., p. 94, pl. 28, fig. 56. 1844. 119 382 NAGASTRU TCT NC OF STATICNS (46914 CH F 1 19AP1946 11JN1964 0.00107 ) 0.00110 > 46920 1257 CH E 3 200E1946 14JL1964 0.00031 ) 0.00239 ) 46 747 1272 EV C" 1 1AU1937 10SE1964 C.0C495 ) 0.C0410 ) ( 1341 1 1554 A 3 GS 1 19AP1967 30C1967 0. 00108 ) 0.0C356 ) 1504 1567 A 3 GS15 28AU1967 50C1967 C. 00247 ) 0.00159 ) 1388 1570 CS12 GS18 12. Y1967 50C1967 C.0C603 ) C.0G992 ) ( 1575 ( 1527 GS28 TR 1 6CC1967 20SE1967 0.00129 I 0.01258 1 1520 1530 HO 1 FR 1 18SE1S67 24SE1967 C.C0471 ) C. 01000 ) 1522 1545 EH 1 WL 1 18SE1967 20C1967 C.0C547 ) C.0C676 ) ( 1550 ( 1400 MR 1 ...__6__2 5CC1967 6. Y1967 0.02476 ) 0.00596 ) 135C 1407 BH 2 SH 2 1SAP1967 14MY1967 C. 01542 ) 0.00597 1 14C2 TR 2 6*Y1967 0. 00541 1 Navioula gastrum var. signata Hust. Navioula gastrum var. signata Hustedt in: 403, figs. 27-28. 1936. A. Schmidt, Atlas Diat., pi. . 383 NAGASTVS TOT NO OF STATIONS (60973 CH CH r.H 1876 12JA1946 JA1947 0.04724 ) 0.00055 ) 0.CC490 ) ( 354C CH 11KY1679 C. 00466 ) (46921 CH 23NC1945 C.0C065 ) (46917 (46905 (46915 (46916 CH CH 20FE1946 4. Y1947 0.01138 ) C. 00034 ) (46914 (46919 CH CH 19AP1946 5JN1947 0.00107 ) C.CC303 ) (46764 (46762 EV EV 17JL1937 18MR1938 0.00806 ) 0.04411 ) (46747 (46761 EV EV 1AU1937 27. Y1S38 0.00743 t C. 00273 ) (46768 ( 1279 EV E 1 16MR1938 16SE1964 C.C1470 ) C.CC393 ) ( 1565 _I ..1526.... GS13 MO 1 50C1967 20SE1967 0.04563 ) 0.01138 ) ( 1574 ( 1527 GS22 TR 1 60C1967 20SE1967 0.00288 ) C. 05031 ) ( 1520 ( 1417 HO HC 1 2 18SE1967 22HY1967 C.0C471 ) C.0C374 ) Navioula globosa Meist. Navioula globosa Meister, Ber. Schweizerische Bot. Ges., 44:89, fig. 8. 1934. 3B_4._-__________:C TCT KC OF STATIONS 4.. -1_ L5Z7 IB__.l 2CSE1967 0.0C629 ) ( 1350 BH 2 19AP1967 C. 00220 ) ( 1354 GH 2 25AP1967 C.CC173 ) ( 1404 HO 2 10. Y1967 0.03811 I ( Navioula gottlandioa Grim. Navioula gottlandioa Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 8. fig. 8. 1880. 385 NAGCTTLA TCT NO OF STATIONS 2 ( 1565 GS13 50C1967 0.07C99 ) ( 14C4 MO 2 10. Y1967 C. 01270 ) ( Navioula graoiloides A. Mayer Navioula graoiloides A. Mayer, Kryptog. Forsch., 1:203, pi. 7, fig. 60. 1919. 386 NAGRACIL TCT NC CF ST.TICNS (46763 ( 1569 EV GS 1 7 23AU1937 50C1967 0. 02029 ) 0.00149 1 1343 1571 A 6 GS19 19AP1967 60C1967 C. 00069 I C. 00059 ) 1554 1574 GS 1 GS22 30C1967 60C1967 C.CC712 ) C. 12944 > ( 1544 ( 1527 . U 1 TR 1 BH 2 20C1967 2CSE1967 19AP1967 0.00238 ) 0.01256 1 1546 1529 LU 1 Kb 1 20C1967 20SE1967 0.00500 ) C. 01199 1 1526 1549 .a l . 0 1 20SE1967 4CC1967 C.0C569 ) C.0137C ) ( 1350 0.00661 1 14C4 MC 2 10HY1967 C. 05081 ) 14C7 SH 2 14HY1967 C.0C597 1 Navioula gregaria Donk. Navioula gregaria Donkin, Quart. J. Micr. Sci., New Ser., 1:10, pi. 1, fig. 10. 1861. 387 NAGREGAR TCT NC CF STATIONS 19 ( 1236 ( 1368 C1 A 1 3 8JN1964 4MY1967 0.00175 1 0.00314 ) 1264 1542 C E 1 10AU1964 110C1967 0.00193 ) C. 00509 ) 1345 1546 C 5 LU 1 25AP1967 20C1967 C.0C195 ) C. 03001 I ( 1521 ( 1531 SH GH 1 1 18SE1967 25SE1967 0.02308 ) 0.00845 ) 1522 1545 BH 1 1 18SE1967 20C1967 0.00365 ) 0.13514 ) 1527 1550 TR 1 MR 1 2CSE1967 50C1967 C.C125S ) C. 03717 ) ( 1426 ( 1418 MS SH 2 2 29MY1967 22HY1967 0.06299 1 0.03110 I 1427 1350 LU BH 2 2 29MY1967 19AP1967 0.01211 ) C. 11013 ) 1417 1354 HO 2 GH 2 22HY1967 25AP1967 C.G3365 ) C.CC345 ) Navioula grimmei Krasske Navioula grimmei Krasske, Abh. Ber. Ver. Naturk. Cassel, 56:45, pi. 1, fig. 14. 1925. 120 38B NAGRIPME TCT NC CF STATIONS 1 1567 GS15 5CC1967 C.0C~l'59 I ( 1550 HR 1 5CC1967 0.01239 ) ( 1426 KS 2 29MY1S67 C.C4199 ) _L_JL15_0_ .__. JBH-2 19AP1967 0.01542 ) ( 1404 WC 2 10MY1967 0.01270 I ( Navioula hambevgii Hust. Navioula hambevgii Hustedt in: Hamberg, Naturw. Untersuch. Sarekgebiet Schwedisch-Lappland, Bd. 3, Bot., p. 562, pi. 17, fig. 2. 1924. Coll: ANSP 46763a. Navioula hasta Pant. Navioula hasta Pantocsek, Beitr. Kenntn. Foss. Bacill. Ungarns, Theil 3, p. 69, Beitr. 3, pi. 5, fig. 74. 1905. Coll: 1813. Navioula heuflevi Grun. Navioula heuflevi Grunow, Verh. Zool.-Bot. Ges. Wien, 10:528, pi. 3, figs. 32a-b. 1860. .389 NAHEUFLE TCT HC CF STATIONS J _13SS1 BJ"_j2 lS_APi967 0.00661 ) <_ Navioula heuflevi var. leptooephala (Br£b.) Patr. Navioula leptooephala de BrSbisson ex Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 7, fig. 16. 1880. Navioula cinota var. leptooephala (Br£b.) Van Heurck, Syn. Diat. Belgique, p. 82. 1885. Navioula heuflevi var. leptooephala (Br£b.) Patrick in: Patrick and Reimer, Acad. Nat. Sci. Philadelphia Monogr., 13:515, pi. 49, fig. 7. 1966. 39C NAHEUFVL TOT KC CF STATIONS _2_ 1. 1527 RH 1 16SE1967 0.00182 ) 1 1417 HC 2 22KY1967 0.00374 I ( Navioula imbvioata Bock Navioula imbvioata Bock, Nova Hedw. , 5:228, pl„ 3, figs. 150-160. 1963. 391 NAIMBR1C TCT KC CF STATIONS 1 (46 756 E_V 27*PlS3jB_ 0.0C168 ) 1___ , Navioula integva (Wm. Smith) Ralfs Pinnulavia integva Wm. Smith, Syn. British Diat., Vol. 2, p. 96. 1856. Navioula integva (Wm. Smith) Ralfs in: Pritchard, Hist. Infusoria, 4th ed., p. 895. 1861. 393 NAINTEGR TOT NC CF STATIONS I "i236"- C' l" " ~ 8JN1964" 0.00350 T < 1342 A 4 19AP1967 0.00361 ) < 15C4 A 3 28AU1967 C.0C247 1 [ 1559 GS 7 40C1967 0.00350 ) I 1522 BH 1 18SE1967 0.00182 ) ( 1417 HO 2 22HV1967 C.0C374 ) I 1350 BH 2 19AP1967 0.03304 1 (. Navioula gaevnefeltii Hust. Navioula jaevnefeltii Hustedt, Arch. Hydrobiol., 39:111. 1942. 394 KAJAEPNE TCT NC OF STATIONS 7 ( 1395 GS19 13HY1967 0.00117 ) I 1569 GS17 50C1967 0.00149 ) ( 1560 ( 1574 GS 8 GS22 40C1967 60C1967 C. 00472 I 0.00288 ) < 1565 I 1575 GS13 GS28 50C1967 60C1967 C.C2028 1 C. 00129 ) ( 1551 ES 1 50C1967 0.00799 I < 121 Navioula lacustris Greg. Navicula lacustris Gregory, Quart. J. Micr. Sci., 4:6, pi. 1, fig. 23. 1856. 396 NALACUST TOT NG OF STATICNS ( 3541 (46919 CH CH 1FE1881 5JN1947 0.01956 ) 0.00152 1 (46514 (46507 CH CH 1SAP1946 JL1947 0.00107 1 C. 00049 ) (46920 (46764 CH EV 200E1946 17JL1937 C. 00031 ) C. 00806 ) (46747 _146J6I EV EV 1AU1937 270C1937 0.00743 ) 0.00387 ) (46765 ( 1258 EV F 1 7SE1937 6JL1964 0.02171 1 0.00236 ) (46760 ( 13 52 EV GS16 LU 2 22SE1937 12MY1967 29MY1967 C.0C492 ) ( 1526 ( 1354 MO 1 GH 2 20SE1967 25AP1967 0.00569 ) 0.0C173 ) ( 1545 ( WL 1 20C1967 C. 06081 ) ( 1427 C. 01211 ) 485 NASPECCK TOT NO OF STATIONS 1 ( 1254 0 2 15JL1964 0.00192 ) ( Navioula lanoeolata (Agardh) Kutz. Fvustulia lanoeolata Agardh, Flora, 10:626. 1827. Navicula lanoeolata (Agardh) KUtzing, Bacill., p. 94, pi. 28, fig. 38. 1844. 395 NALANCEC TCT NO OF STATIONS 67 (60973 (46914 CH CH 1876 19AP1946 0.02362 1 0.00107 1 (46521 (46520 CH CH 23N01945 200E1946 C. 00065 ) 0.00031 ) (46915 (469C5 CH CH 20FE1946 0.01138 ) (46906 (46758 CH EV MY1947 5JN1937 0.00199 ) 0.00357 1 (465C7 (46743 CH EV JL1947 20JN1937 C. 00049 ) 0.00428 I (46922 (46764 CH EV 21 AU 194 7 17JH937 C. 00048 I C. 04029 ) (46757 (46765 EV EV 25JL1937 30AU1937 0.12999 ) 0.01115 I (46747 (46752 EV EV IAU1537 15SE1937 0.03218 ) 0.15237 ) (46763 (46760 EV EV 23AU1937 22SE1937 C.18263 ) C.0C492 ) (46750 (46767 EV EV 24SE1937 270C1937 0.01414 ) 0.01160 1 (46744 (46749 EV EV 60C1937 12MR1938 0.02439 ) 0.01214 ) (46748 (46768 EV EV 130C1937 16MR1538 0.04270 ) C.C4410 ) . (46762 ( 1305 EV F 2 18MR1938 HOC 1964 0.04411 1 0.00173 1 ( 1232 ( 1341 E A 5 3 16HY1964 19AP1967 0.00174 1 0.00108 ) ( 1285 ( 1375 F 1 E 3 CS13 GSie 15SE1964 7MY1567 12HY1967 12HY1967 0.01165 ) C.0C241 ) C.C0258 ) C.QC616 ) ( 1453 ( 1390 E 3 GS14 15JL1967 12MY1567 0.00253 1 0.00587 ) ( 1377 ( 1391 GS 1 GS15 9MY1967 12KY1967 0.00396 ) 0.00479 ) ( 1389 ( 1392 ( 1394 ( 1560 GS18 GS 8 13MY1967 40C1967 C.0C172 1 0.00472 ) ( 1555 ( 1565 GS 2 GS13 30C1967 50C1967 0.00353 ) 0.01521 1 ( 1558 ( 1572 GS 5 GS20 40C1967 60C1967 C.CC396 ) C.CC090 ) ( 1573 ( 1544 GS21 mu i 60C1S67 20C1967 0.00112 ) 0.0C238 ) ( 1574 ( 1547 GS22 MS 1 60C1967 2CC1967 0.00288 1 0.00798 ) 1 1575 ( 1546 GS2B LU 1 61X1367 20C196 7 C. 00129 ) C.1S005 ) ( 1520 ( 1527 HO 1 TR 1 18SE1967 20SE1967 0.00471 1 0.05031 ) ( 1521 ( 1529 SH 1 1 18SE1967 20SE1967 0.00577 1 C. 01199 ) ( 1522 ( 1545 en i ML 1 18SE1967 20C1967 C. 01641 ) C. 03379 1 I 1552 ( 1426 SH 1 MS 2 60C1967 29MV1967 0.00660 ) 0.02100 ) ( 1550 ( 1351 MR MI 1 2 50C1967 21AP1567 C. 26019 ) C. 00621 ) I 1553 ( 1427 SG 1 LU 2 60C1967 25MY1967 C. 00734 ) C. 01211 ) ( 1350 ( 1400 BH 2 SB 2 19AP1967 6MY1967 0.04405 ) 0.05361 ) ( 1401 ( 1404 MO MO 2 2 6MY1967 10MY1967 0.03528 ) 0.01270 ) ( 1402 ( 1406 TR 2 G8 2 6MY1967 13HY1967, C. 09747 ) C.C1078 ) ( 1423 MA 2 25MY1967 0.00428 ) ( Navicula lanoeolata var. cymbula (Donk. ) Cleve Navicula cymbula Donkin, Quart. J. Micr. Sci., 9:294, pi. 18, fig. 6. 1869. Navicula lanoeolata var. cymbula (Donk.) Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 27(3):22. 1895. 398 NALANCVC TCT NO OF STATIONS ( 1305 I 1404 F 2 MO 2 110C1964 10MY1967 0.00173 ) 0.C127C 1 50C1567 0.00507 ) 29MY1967 C.0C3O1 ) Navicula latens Krasske Navicula latens Krasske, Arch. Hydrobiol., 31:41. 1937. 199 NAIATFNS TFT NO OF STATIONS 25JL1937 0.00481 ) ( 1521 18SE1967 0.00577 ) ( 1526 20SE1967 0.02516 ) 0.13514 ) 1 1550 20SE1967 0.01444 ) ( 1530 FR 1 24SE1967 0.01000 1 5nr.lS67 C.01739 1 ( 1402 JJL2 6MY1567 C.0Q541 ) 25AP1967 0.00345 I 19AP1967 0.00359 I ( 1422 Navicula laterostrata Hust. Navicula latevostvata Hustedt, Internat. Rev. Hydrobiol., 13:357, fig. 4. 1925. Coll: 1404. Navicula levandevi Hust. Navicula levandevi Hustedt, Internat. Rev. Hydrobiol., 43:174. 1943. 400 NALEVAND TOT NO OF STATIONS 2 (46757 EV 25JL1937 0.00481 ) (46763 EV 23AU1937 C. 04058 ) ( 122 Navioula men-is cuius Schum. ii ii Navioula menisculus Schumann, Schrift. K. Phys..-Okonom. Ges. Komgsberg, 8:56, pi. 2, fig. 33. 1867. 401 NAMEMSC ICT NO OF STATIONS 1240 1341 a 6 _A 3_ 10JN1964 19AP1967 0.00152 ) 0.00106 ) ( 13C5 ( Navioula menisculus var. obtusa Hust. Navioula menisculus var. obtusa Hustedt, Arch. Hydrobiol., Suppl. 15:271, pi. 20, figs. 12-14. 1938. 402 NAMEMVC TCT NC OF STATIONS 9 _-EVL (4675JL (46752 EV 1_1544 _ __MU 1 5 JN1937 0.0C357 1 (46757 15SE1937 20C196 7 0.06530 ) 0.0C238 ) " (46768 JL_1545_ 25JL1S37 0.00481 ) lj>bjb3_ EV t 1 0.08822 ) (46767 (46756 EV EV 270C1937 27AP1938 C.0C774 ) C.0C168 ) (46759 ( 1285 EV F 1 19MY1938 15SE1964 0.0C338 ) 0.00582 ) ( 1246 ( 1298 F 3 E 1 11JN1964 120C1964 0.00598 ) 0.00269 ) ( 1279 ( 1387 E 1 GS11 16SE1964 12MY1967 C.CC393 ) C.0C396 ) ( 1388 ( 1566 GS12 GS14 12MY1567 50C1967 0.00603 ) 0.00183 ) ( 1389 ( 1568 GS13 GS16 12MY1967 5QC1967 0.00258 ) 0.00144 1 ( 1565 ( 1574 GS13 GS22 50C1967 60C1967 C.C7606 ) C. 01726 ) ( 1547 ( 1521 MS 1 SH 1 20C1967 18SE1967 0.01597 ) 0.00577 ) ( 1546 ( 1522 LU 1 BH 1 20C1967 18SE1967 C. 01000 ) 0.00729 ) ( 1520 ( 1526 HO 1 *0 1 18SE1567 2CSE1967 C.CC471 ) 0.00569 ) ( 1527 ( 1550 TR 1 MR 1 20SE1967 50C1967 0.03774 ) 0.09912 ) ( 1529 ( 1553 Kk 1 SG 1 20SE1967 60C1967 0.01199 ) 0. 00734 1 ( 1545 ( 1426 M. 1 fS 2 2QC1967 29MY1967 C.C0676 ) 0.01050 ) ( 1427 ( 1400 LU 2 SB 2 29MY1967 6MY1967 0.01211 ) 0.00596 I ( 1417 ( 1352 HO 2 KW 2 22MY1967 21AP1967 0.00374 ) 0.00859 ) ( 1350 ( 1354 BH 2 GH 2 19AP1967 25AP1967 C. 05506 ) C.CC173 ) ( 1429 ( 1407 UL 2 SM 2 29MY1967 14MY1S67 0.01062 ) 0.0C597 ) ( 1404 ( 1422 MO 2 GA 2 10MY1967 23MY1967 C. 05081 I 0.00511 1 ( 1405 ( ES 2 12MY1967 C. 01935 ) Navioula pupula var. aquaeduotae (Krasske) Hust. Navioula aquaeduotae Krasske, Bot. Arch., 3:197, fig. 4. 1923. Navicula pupula var. aquaeduotae (Krasske) Hustedt in: Pascher, Sussw. Mitteleuropas, Heft 10, Aufl. 2, p. 282. 1930. -Fl. 432._NAeiiPUVA TOT NO OF STATIONS 1 ( 1550 MR 1 50C1967 0.01239 ) ( Navioula pupula var. capitata Skv. and Meyer Navioula pupula var. capitata Skvortzow and Meyer, Proc. Sungaree River Biol. Sta., 1(5) :15, pi. 1, fig. 40. 1928. ^4Z8__ (46758 I OF STATIONS _£}!_ 23AU1937 C.C4058 1 (46752 (46760 EV ( 1350 8H 2 22SE1937 0.OC492 ) ( 1565 19AP1967 0.CC441 ) ( 50C1967 0.00507 ) ( 1417 HO 2 22MY1967 C. 00374 ) Navicula pupula var. elliptioa Hust. Navicula pupula var. elliptioa Hustedt, Abh. Naturw. Ver. Bremen, 20:291, pi. 3, fig. 40. 1911. _4.2S NAPUPDFE TOT NC CF STATIONS 2 JL469JJ5 CiL 20FE1946 0.00569 ) (46764 17JL1937 0.00806 I ( Navicula pupula var. rectangularis (Greg.) Grun. Stauroneis rectangularis Gregory, Quart. J. Micr. Sci., 2:99, pi. 4, fig. 17. 1854. Navicula pupula var. rectangularis (Greg.) Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17(2): 45. 1880. 128 43JL__.MA£UfUFR_ (46764 EY 1 f]F STATIONS 3. 17JL1937 0.00806 ) 50C1967 0. 00507 1 ( 1423 25HY1967 C.CC428 ) Naviaula pupula var. rostrata Hust. Navioula pupula var. rostrata Hustedt, Abh. Naturw. Ver. Bremen, 20:211, pi. 3, fig. 39. 1911. .433 NAPUPUVR TCT NO OF STATIONS 13 1R76 n.nP363 l I46C34 r.H i rum 946 n.nnfm i (46919 r.H 5JN1947 C. 00152 ) (46922 CH GS12 21AU1947 12MY1567 0. 00145 ) 0.00603 1 (46747 ( 1526 EV MO 1 1AU1937 20SE1967 0.00743 ) 0.00569 ) (46750 ( 1551 EV ES 1 24SE1937 50C1967 C.CC471 ) C.CC799 ) ( 1550 ( 1421 MR 1 CH 2 50C1967 23MY1967 0.01239 1 0.01735 ) ( 1350 ( BK 2 19AP1967 0.00220 ) ( 1407 SM 2 14MY1967 C. 00597 ) Navicula pygmaea Kutz. Navioula pygmaea Kilt zing, Sp. Alg., p. 77. 1849. .43.4 NAPVGMAF TCT NO OF STATIONS ( 1264 C 1 10AU1964 0.00193 ) ( 1565 GS13 50C1967 0.00507 ) ( 1522 BH 1 18SE1967 C.0C182__L Navicula quadripartita Hust. Naviaula quadripartita Hustedt, Arch. Hydrobiol., Suppl. 15:263, pi. 18, figs. 35-37. 1937. 436 NACPARTI TOT NC OF STATIONS 1 J-1545 hLt l_ 20C1567 0.CC676 1 [ Navioula radiosa Kutz. Navioula 437 NARADIOS TCT (60973 r.H : radiosa Kutzing, Bac NO OF STATIONS 101 1676 0.02362 1 ( 3540 ill _£H_ • » p. 91, i 11MY1875 >1. 4, 0.06523 fig. 23. ) ( 3541 CH 1844 1FE1881 C. 23476 ) ( 3507 (46917 CH r.H 19FE1881 12JA1946 0.04528 ) 0.00527 1 (46510 (46915 CH CH 0C1945 20FE1946 0.00218 0.01707 ) (46921 ) (46914 CH CH 23N01945 19AP1946 C.0C517 ) 0.00427 ) (46924 (469(15 CH r.H 10MY1946 JA1947 0.00423 ) 0.00123 ) (46923 (46909 CH CH 22N01946 MR1947 0.03716 0.02277 ) (46920 ) (46912 CH CH 20OE1946 AP1941 C.C1109 ) C. 04599 ) (46916 (46907 CH r.H 4MY1947 JI.1947 0.02409 ) 0.11785 ) (46SC6 (46522 CH CH MY1947 21AU1947 0.01858 0. 04507 ) (46919 1 (46758 CH EV 5JN1947 5JN1937 C. 10925 ) C.C1783 ) (46771 (4A764 EV FV 11JN1937 17.11 1937 0.0C475 ) 0.20951 1 (46743 (46757 EV EV 20JN1937 25JL1937 0.02141 C. 12999 ) (46770 1 (46747 EV EV 9JU937 4AU1937 C. 01193 1 C.C8664 1 (46763 (46748 EV FV 23AU1937 i3nr.i937 0.04058 1 0.02135 1 (46752 (46767 EV EV 15SE1937 270C1937 0.02177 0.00774 ) (46744 ) (46768 EV EV 60C1937 16MR1538 C.00488 ) C. 01470 ! (46762 146759 EV FV 18MR1938 19MY1938 0.06617 ) 0.00338 ! (46751 (46766 EV EV 30MR1938 14DE1938 0.01117 0.01534 ) (46772 ) ( 1232 EV E 5 18AP1538 16MY1964 C.0C710 ) C.CC348 J ( 1240 ( 1244 D 6 F 1 10JN1964 UJN1964 0.00153 ) 0.00768 ) ( 1241 ( 1245 E F 2 ? 13JN1964 11JN1964 0.00148 0.02766 ) ( 1243 ) ( 1246 E F 6 3 13JN1964 11JN1564 0.0C626 ) C.03586 ) ( 1258 r 1268 F I F ? 6JL1964 15AU1964 0.00708 ) 0.00547 1 ( 1259 ( 1279 F E 2 1 6JL1964 16SE1964 0.00310 0. 01178 ) ( 1260 ) ( 1285 F F 3 1 6JL1964 15SE1964 C. 00573 ) C.03494 ) ( 1286 1 1305 F 2 F ■> 15SE1964 110C1964 0.01095 ) 0.00345 1 ( 1290 ( 1306 C F 1 3 16CC1964 110C1964 0.00379 0.00832 ) ( 1304 ) ( 1341 F A 1 3 HOC 1964 19AP1967 C.0C494 ) C. 00108 ) ( 1345 1 13R? C 5 r,s 6 25AP1967 10MY1967 0.00195 ) 0.01665 1 ( 1379 ( 1383 GS GS 3 7 5MY1967 10KY1967 0.00928 0.00267 ) ( 1380 I ( 1384 GS GS 4 8 9MY1967 1CMY1967 C.0C504 ) 0.00739 ) ( 1385 ( 13R8 GS 9 RSI 2 10MY1967 12MY1967 0.00706 ) 0.23529 ) ( 1386 ( 1389 GS10 GS13 12MY1967 12MY1967 0.00287 0.03868 I ( 1387 1 ( 1390 C-Sll GS14 12MY1967 12MY1967 C. 02376 ) C. 24662 1 1 1391 ( 1394 GS15 GS18 12MY1967 13MY1967 0.19633 ) 0.11009 ) ( 1352 ( 1395 GS16 GS19 12MY1967 13MY1967 0.01541 0.00352 ) ( 1393 ) ( 1396 GS17 GS2C 13MY1967 13MY1967 C. 06575 ) C. 00148 ) ( 1398 ( 1564 GS22 GS12 14MY1967 50C1967 0.00607 ) 0.00165 ) ( 1558 ( 1565 GS 5 GS13 40C1967 50C1967 0.00793 0.01521 ) ( 1563 ) ( 1566 GS11 GS14 50C1967 50C1967 C.C0701 ) 0.01101 ) ( 1567 1 1S70 GS15 GS18 50C1967 5DC1967 0.08891 ) 0.21817 I ( 1568 ( 1571 GS16 GS19 50C1967 60C1967 0.00289 0.00117 ) ( 1^69 1 ( 1572 GS17 GS20 50C1967 60C1967 C. 13081 ) C. 00090 ) ( 1574 I 1549 GS22 MO 1 60C1967 40C1967 0.01433 ) 0.01370 1 ( 1575 ( 1551 GS28 ES 1 60C1967 50C1967 0. 00387 0.00799 ) ( 1522 ) ( 1552 BH SM 1 1 18SE1967 60C1967 C. 00182 ) C.CC66C ) ( 1550 ( 1402 MR 1 TR 7 50C1967 6MY1967 0.02478 ) 0.00541 1 ( 1426 ( 14T3 MS ca 2 29MY1967 C. 01050 0.09154 ) ( 1350 BH MO 2 2 19AP1967 10MV1967 C.0C881 ) t. 06352 1 ( 1405 ES 2 12MY1S67 C. 01935 1 ( 1407 SM 2 14MY1567 0.00597 ) ( Navioula radiosa var. parva Wallace Navioula radiosa var. parva Wallace, Not. Nat. Acad. Nat. phia, 331:3, pi. 1, fig. 5. 1960. Sci. Philadel- 438 NARADIVP TOT NO OF STATIONS 0.01165 ) 129 Navicula radiosa var. tenella (Br£b.) Grun. Navicula tenella de Brebisson ex Kutzing, Sp. Alg., p. 74. 1849. Navicula radiosa var. tenella (Br£b.) Grunow in: Van Heurck, Syn. Diat. Belgique, p. 84. 1885. 439 NARADIVT TOT NO OF STATIONS (46915 (46764 CH EV 20FE1946 17JL1937 0.00569 ) 0.04029 ) 46920 46757 CH EV 200E1946 25JL1937 C.C0031 ) 0.01926 I 46919 46 763 CH EV 5JN1947 23AU1937 C.CC303 ) C. 04058 I (46766 ( 1240 EV D 6 140E1938 10JN1964 0.01584 ) 0.00153 ) 1229 1243 D 5 E 6 14MY1964 13JN1964 0. 00211 I 0.00209 I 1231 1244 E 3 F 1 16MY1964 11JN1964 C.CC245 ) 0. 00439 I ( 1256 I 1270 E 2 F 1 14JL1964 10AU1964 0.00183 ) 0.01634 ) 1258 1275 F 1 D 2 6JL1964 17SE1964 0.00944 1 0.00645 ) 1268 1279 E 2 E 1 15AU1964 16SE1964 C.C1094 ) 0.01178 ) ( 1285 X_1A2Q__ F 1 E 4 15SE1964 7N01964 0.52996 1 0.CC207 ) 1286 1340 F 2 C 7 15SE1964 28NR1967 C. 01095 ) C. 00073 ) 1304 1341 F 1 A 3 110C1964 19AP1967 C.0C494 ) C.0C325 ) ( 1452 ( 1542 6 2 E 3 14JL1967 11CC1967 0.00852 ) 0.00509 ) 1536 1387 E 2 GS11 24SE1967 12KY1967 0.00545 ) 0.00396 ) 1541 1388 E 2 GS12 11CC1967 12MY1967 CO 1064 ) C.0C603 ) ( 1389 ( 1395 GS13 GS19 12MY1967 13HY1967 0.00258 I 0.00117 ) 1390 1554 GS14 GS 1 12HY1967 30C1967 0.00587 ) 0.00712 1 1394 1555 GS18 C-S 2 13MY1967 30C1967 C. 00344 I C.0C706 ) I 1557 I 1574 SS 4 GS22 BH 1 SM 1 3DC1967 60C1967 18SE1967 60C1967 0.01121 1 0.0C863 I 1558 1544 GS 5 MU 1 40C1967 2CC1967 0.00793 ) 0.00477 ) 1560 1547 GS 8 CS 1 40C196 7 20C1967 C.0C945 ) C.CC798 ) ( 1522 I 1552 0.00182 ) 0.00660 1 1530 1550 FR 1 MR 1 24SE1967 50C1967 0.12001 ) 0.04956 ) 1549 1553 VQ 1 SG 1 40C196 7 6CC1967 C. 01370 ) C.C1469 ) ( 1428 1 14fl2 MU 2 TR 7 29MY1967 6fY1967 0.00301 ) 0.0C541 ) 1426 1352 MS 2 KU 2 29MY1967 2IAP1967 0.02100 1 0.00859 ) 1350 1354 BH 2 GH 2 19AP1967 25AP1967 0.06388 ) C.0C345 ) ( 1403 CA 2 10MY1967 0.23539 ) 1404 MO 2 10MY1967 0.08892 ) 1405 ES 2 12MY1967 CO 1290 ) Naviaula reinhardtii (Grun.) Grun. Stauroneis reinhardtii Grunow, Verb.. Zool.-Bot. Ges. Wien, 10:566, pi. 6, fig. 19. 1860. Naviaula reinhardtii (Grun.) Grunow in: Cleve and Grunow, K. Svenska Vet.- Akad. Handl., Ny FBljd, 17(2) :32. 1880. 440 NAREINHA TCT NO OF STATIONS 41 (60973 146910 CH CH 1876 CC1945. 10MY1946 MY1947 0.04724 ) 0.00109 I 0.00071 ) C.0C066 1 1 3540 (46921 Ch CH 11MY1879 23N01945 0.00932 ) C. 00129 ) ( 3541 (46917 CH CH 1FE1E81 12JA1946 C.CC978 1 C.0C055 ) (46924 (46906 CH __. CiL EV FV (46920 (469C7 CH CH 200E1946 JL1947 0.00246 ) 0.00148 ) (46916 (46922 CH CH 4MY1947 21AIU947 C. 00034 ) C.CCC97 ) (46758 (46744 5JN1937 6tlf.l937 0.00713 1 0.00488 1 (46752 (46748 EV EV 15SE1937 13CC1937 0.06530 ) C. 02135 ) (46750 (46767 EV EV 24SE1937 270C1937 C.CC943 1 C.0C774 ) (46749 EV r.' 1 F 1 G.S15_ GS22 Ml 1 12MR1938 8JN1964 15SE1964 12Mi LS6 7 C. 01214 ) 0.00175 ) 0.00582 ) 0.00479 ) (46751 < 1245 EV F 2 30MR1938 11JN1964 0.01117 ) C. 00346 I (46761 ( 1258 EV F 1 27MY193E 6JL1964 C.CC273 ) 0.00236 I ( 1285 ( 1541 ( 1296 E 2 GS20 11CC1967 13MY1967 C. 00532 ) 0.00148 ) I 1367 ( 1398 GS11 GS22 12MY1967 14MY1967 C.CC396 ) C. 00304 ) ( 1574 ( 1545 6CC1967 20C1967 0.00575 ) 0.00676 ) ( 1575 ( 1550 GS28 MR 1 60C1967 50C1967 0. 00387 ) 0.01239 1 ( 1544 ( 1426 FU MS 1 2 2CC1967 29MY1967 C.CC238 ) C. 02100 ) 1 1354 I 1405 GH _ES 2 2 25AP1967 12MY1967 0.00345 ) 0.00645 1 ( 1429 ( 1407 HI SM 2 2 29MY1967 14MY1967 C. 01062 ) 0.00597 ) ( 1404 ( CO 2 10MY1967 C.C1270 ) Naviaula reinhardtii var. elliptica Hgrib. Naviaula reinhardtii var. elliptica HfSribaud, Diat. Foss. Auvergne, Vol. 2, p. 8. 1903. 441 NARF (46905 INVE TCT CH KC. Cf STATICNS 7 JA1947 0.00245 I (46919 CH 5JN1947 0.00152 ) ( 1544 *U 1 20C1967 C.0C238 ) ( 1528 ( 1354 SB 1 GH 2 20SE1967 0.01444 I 25AP1967 0.00518 ) ( 1428 ( MU 2 29MY1967 0.00301 ) ( 1427 LU 2 29MY1967 0.03632 ) Naviaula rhynchocephala Kutz. Navicula rhynchocephala Kutzing, Bacill., p. 152, pi. 30, fig. 35. 1844. 447 NARHYNCH TCT NO OF STATIONS 7 146915 CH 20FF1946 0.00569 1 (46920 CH 20CE1946 C. 00031 1 (46916 CH 4MY1947 C.CCC34 ) (46764 EV 17JL1937 0.00806 I (46768 EV 16KR1938 0.C1470 ) (46757 ( EV 25JL1937 0.00481 ) (46763 EV 23AU1937 C. 02029 ) Naviaula rotunda Hust. Naviaula rotunda Hustedt, Arch. Hydrobiol., 40:916, pi. 41, fig. 29. 1945. 443 NAROTUND TCT HO OF STATIONS JLL B.I 13 0.04563 I ( 1575 60C1967 C. 00129 ) ( 1525 PW 1 ( 1549 M0_X- 20SE1967 40C1967 0.01393 I 0.01370 1 ( 1526 ( 1550 6MY1967 0.00541 ) MO 1 MR 1 20SE1967 50C1967 0.00569 ) C. 01239 ) ( 1527 ( 13 50 TR 1 BH 2 20SE1967 19AP1967 C. 01887 ) C.CC661 ) 130 Navicula salinarum Grun. Navicula salinarum Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17(2) :33, pi. 2, fig. 34. 1880. 444 NASALIKA TCT NO OF STATIONS 4MY1947 C.0C034 ) Navicula sohoenfeldii Hust. Navicula schonfeldii Hustedt in: Pascher, Sussw.-Fl. Mltteleuropas, Heft 10, Aufl. 2, p. 301, fig. 520. 1930. 455 NASCHCNC TOT NO OF STATIONS 50C1967 0.01239 ) Navicula scutelloides Wm. Smith Navicula scutelloides Wm. Smith ex Gregory, Quart. J. Micr. Sci., 4:4, pi. 1, fig. 15. 1856. 373 NADECUSC TCT NO OF STATIONS 445 NASCUTEL TCT NO OF STATI GNS 38 (60973 CH 1876 1AU1937 0.02362 ) 0.0C248 ) 3540 1245 CH F 2 UMY1879 11JM964 0.00466 ) 0. 00346 ) (46920 ( 1267 CH 0 6 200E1946 18AU1964 C.CCC31 1 C.C0216 ) ( 1274 I 1370 D 1 F 4 17SE1964 7N01964 0.00469 ) 0.0C207 ) 1279 1541 E 1 E 2 16SE1964 11CC1967 0.01571 } 0.00532 ) ( 1304 ( 1542 F 1 E 3 110C1964 110C1967 C. 00247 ) C.C1C17 ) ( 1382 [ 1554 ( 1557 1 1567 GS 6 GS 1 GS 4 GS15 10MY1967 30C1967 0.00278 ) 0.00712 ) 1395 1555 GS19 GS 2 13MY1967 30C1967 0.00117 1 0.00706 ) ( 1396 ( 1556 ES20 GS 3 13HY1967 30C1967 C.0C222 ) C. 00521 ) 30C196 7 50C1967 0.0C374 ) 0.00794 ) 1558 1569 GS 5 GS17 4CC1967 50C1967 0.00396 ) 0.00149 ) ( 1565 ! 1571 GS13 GS19 50C1967 60C1967 1.29804 ) C.0C059 ) ( 1572 GS20 60C1967 6QC1967 0.00721 ) 0.0C387 ) 1573 1546 GS21 LU 1 6CC1967 20C1967 0. 00448 ) 0.00500 ) ( 1574 ( 1520 GS22 HO 1 60C1967 18SE1967 C.C1438 ) C. 00471 ) ( 1530 1 1426 FR 1 MS 7 24SE1967 29MY1967 0.03000 ) 0.01050 ) 1550 1427 MR 1 LU 2 50C1967 29MY1967 C. 11151 ) 0. 08475 } ( 1553 I 1350 SG 1 6H 2 60C1967 19AP1967 0.C2938 ) C.CC881 ) ( 1354 GH 2 25AP1967 0.00173 ) 14C4 MO 2 10MY1967 0.03811 ) ( Navicula semenoides Hust. Navicula semenoides Hustedt, Arch. Hydrobiol., 18:163, pi. 5, fig. 8. 1927, ( 1279 i_J3A8„ E 1 GS12 16SE1964 12HY1S67 0.00393 I 0.01810 ) ( 1319 ( 1565 E 3 GS13 7N01964 50C1967 C.C0262 ) 0.29916 ) ( 1343 1 1573 A 6 GS21 19AP1967 6QC1967 C.0CC69 ) _c.-ocii.3_J_ Navicula seminuloides Hust. Navicula seminuloides Hustedt in: A. Schmidt, Atlas Diat., pi. figs. 68-71. 1936. 401, 448 NASEMINC TCT NO OF STATIONS ( 1286 I 1567 . F 2 GS15 15SE1964 5QC1967 C. 01095 I 0.00318 I ( 1325 ( 1521 F 3 SH 1 6N01964 16SE1967 0.00252 I 0.00577 ) Navicula seminulum Grun. Navicula seminulum Grunow, Verh. Zool.-Bot. fig. 3. 1860. Ges. Wien, 10:552, pi. 4, 446 NASEMINU TOT NO OF STATI 0NS 26 (46920 CH 20DE1946 16SE1964 0.00031 } 0.01178 ) 46909 1285 CH F 1 KR1947 15SE1964 0.00455 » C. 00582 ) 1278 1318 D 6 E 2 16SE1564 7N01964 C. 00384 ) C.CC190 ) ( 1348 E 5 23AP1967 50C196 7 0.00137 1 0.00476 ) 1565 1569 GS13 GS17 50C1967 50C1967 8.51840 ) 0.00149 ) 1566 1574 GS14 C-S22 50C1967 60C1S67 C.CC183 ) 0.C1438 ) ( 1546 LU 1 20C1967 19SE1967 0.01501 ) 0.00923 ) 1521 1526 SH 1 MO 1 18SE1967 20SE1967 0.00577 ) 0.00569 ) 1522 1527 8H 1 7R 1 18SE1967 20SE1967 C.0C547 ) C.C3774 ) ( 1529 KM 1 20SE1967 60C1967 0.01199 ) 0.00660 ) 1545 1550 WL 1 MR 1 2CC1967 50C1967 0.00676 ) C. 49560 ) 1551 1553 ES 1 SG 1 50C1967 60C1967 C.0C799 ) C.C2203 ) ( 1350 8H 2 19AP1967 0.07048 ) 1354 GH 2 25AP1967 0.00173 I 131 Navioula seminulum var. intermedia Hust. Navioula seminulum var. intermedia Hustedt, Arch. Hydrobiol., 39:110, figs. 25-28. 1942. 4*7 NASEHIVI TOT NO OF STATIONS 1 ( 1264 C 1 10AU1964 0. 00193 ) ( Navioula similis Krasske Navioula similis Krasske, Bot. Arch., 27:254, fig. 15. 1929. 450 NAS1MLI TCT NC CF STATIONS <_13_a4___G_S_li I2MY1967 C.0C6C3 ) ( 1665 GS13 5CC1967 0.01521 1 ( 1350 EH 2 19AP1967 C.0C22C ) Navioula simplex Krasske Navioula simplex Krasske, Abh. Ber. Ver. Naturk. Cassel, 56:112, pi. 1, fig. 16. 1925. 459 NASIEPIE TCT NC Cf STATIONS 1 < 1350 BH 2 19AP1967 0.0C22C ) L Navioula skdbitsohewskyi Kiselev Navioula skabitsohewskyi Kiselev (original description not available, cited in Zabelina et al, Opred, Presn0 Vod. USSR, p. 279. 1951). _45J NASKABIO TPT NO OF STATIONS 1 ( 1349 01 2 19AP1967 0.00359 ) ( Navioula stroeseik. Cleve Stauroneis dilatata Wm. Smith sensu StrBse, Festschr. XXXVII Versamml. Deutsch. Philog. Schulm. Dessau, p. 11, pi. 1, fig. 28. 1884. (non Wm. Smith 1853). Navioula tusoula var. strbsei 0strup, Danske Diat., p. 84, pi. 1, fig. 28. 1910. Navioula strdsei A. Cleve, Acta Forest. Fennica, 22(4) :63. 1922. Navioula -pseudo tusoula Hustedt, Internat. Rev. Hydrobiol., 43:170. 1943. __A5-2,-,_NASJflD£i_.lCX NC CF_SlAJ_IilNS _S.„_ 146758 FU 5.IN1937 (1.01426 ) 146764 EV 17JL1937 C.04C29 ) (46757 EV 25J11937 C.CC963 ) 1362 Si 10MY1967 oto0278l (1388 GsTi 12NY1967 0.01207 ) Tl39l GS15 12MY1967 0.00479 ) I 1965 GS13 500967 0.00507 ) ( 1569 GS17 50C1967 C. 00149 ) ( 1574 GS22 60C1967 C.0C288_1_ Navioula stroemii Hust. Navioula stromii Hustedt, Arch. Hydrobiol., 22:544, fig. 3. 1931. 453 NASTROMC TOT NO OF STATIONS 3 146919 r.H 5JN1947 0.00910 ) (46747 EV 1AU1937 0.00248 ) ( 1565 6S13 50C1967 C. 02028 ) Navioula suboostulata Hust. Navioula suboostulata Hustedt, Abh. Bremen Wiss. Ges., 8/9:386, fig. 13. 1934. 457 NASCCSTU TCT NO OF STATIONS 1 ~[ 1433 C~ 3 17JNI967 0.0C646 ) ( 132 Navioula subhamulata Grun. Navicula subhamulata Grunow in: Van Heurck, Syn. Diat. Belgique, p. 106, pi. 13, fig. 14. 1885. 458 NASHAMUl TCT KC CF STATIONS ( 1574 ( 1350 GS22 _B±t_2_ 6CC1967 0.00288 I ( 1545 19AP1967 0.00441 I ( 14C3 WL 1 20C1967 0.00676 I ( 1549 10HY1967 0.01308 ) ( 4CC1967 C. 01370 ) Navioula subvhynchocephala Hust. Navicula subvhynoohocephala Hustedt, Arch. Hydrobiol. pi. 1, fig. 11. 1935. Suppl. 14:156, 487 NASPECCI TCT NC CF S1ATICNS 19 (60973 (46743 Ch FV 1876 20JN1937 0.04724 ) 0.00428 ) (46915 (46770 CH EV 20FE1946 9JL1937 0.00569 ) 0.01789 ) (46758 (46764 tv EV 5JM937 17JL1937 C.CC357 ) 0.06446 ) (46757 1 46760..- EV FV 25JL1937 22SE1937 0.C337C ) 0.00492 ) (46763 (46768 EV EV 23AU1937 16MR1938 0.12175 ) 0.04410 ) (46752 (46762 EV EV 15SE1937 18MR1938 C.C2177 ) C. 08822 ) (46766 _(...15.46_._ EV LU 1 SK 2 14DE1938 ?nC196 7 '14MY1S67 0.01584 I O..02501 L 0.0C597 1 ( 1306 i L350._ ( F 3 BH 2 11CC1964 19AP1967 C. 00277 1 0.00661 ) ( 1557 ( 1404 GS KO 4 2 30C1967 10MY1967 C.CC374 ) C. 05081 ) ( 1407 Navioula subvotundata Hust. Navicula subvotundata Hustedt, Arch,, Hydrobiol., 30-33. 1945. __46_CL NASRCTUQ TOT NO OF STATIONS 12 40:917, pi. 41, figs. (46916 _ CH_ 4MY1947 C. 00034 ) ( 1274 C 1 17SE1964 C.C0469 1 ( 1275 0 2 17SE1964 C.0C645 1 ( 1348 I 1384 E 5 GS 8 23AP1S67 10MY1967 Q. 00137 ) 0.00185 I ( 1449 ( 1565 C 3 GS13 16JL1967 50C196 7 0.00382 ) C. 04056 I ( 1538 ( 1574 E 5 C-S22 23SE1967 6CC1967 C.CC552 ) C.0C575 ) 1 1545 WL 1 20C1S67 0.00676 1 ( 1350 BH 2 19AP1967 0.00881 1 ( 1354 GK 2 25AP1967 C.QC345 1 Navicula subsulcata Hust. Navioula subsulcata Hustedt, Arch. Hydrobiol., Suppl 15:261, pi. 18, fig. 7. 1938. 526 NASPECAZ TCT NO CF STATIONS 1 ( 1350 BH 2 19AP1967 0.0C22C I 1 Navicula tantula Hust. Navicula tantula Hustedt, Intemat. Rev. Hydrobiol., 43:162. 1943. 461 NATANTUL TOT NC CF STATIONS (46763 ( L275 EV D 2 E 3 F 1 E 6 A 6 23AU1937 17SE1964 0. 02029 1 0.00645 I 1272 1278 C 1 D 6 10SE1964 18SE1964 0.0041.0 ) 0.00384 ) 12 74 1280 0 1 E 2 17SE1964 16SE1964 C. 01408 ) C. 00681 1 ( 1281 J .1285 _ 16SE1964 15SE1964 7N01964 19AP1967 0.00392 ) __Q_,JU741_] . 1282 L 1287 E 4 F 3 16SE1964 15S61964 C. 01108 ) C. 00500 1 1284 1303 E 6 E 6 17SE1964 130C1964 C.0C318 ) 0.01119 ) ( 1322 ( 1343 0.00333 ) 0.0C069 1 1323 1534 F 1 A 6 6N01964 19SE1967 0.00139 I 0.00310 ) 1324 1538 F 2 E 5 6N01964 23SE1967 C.CC233 ) C. 00552 1 ( 1565 I 1523 GS13 RA 1 5QC1967 19SF1967 0.00507 ) _0,iC9_2.a J 1567 1525 GS15 PW 1 5QC1967 20SE1967 C. 00476 1 0.01393 1 1571 1545 GS19 hL 1 60C1967 20C1967 C.CC059 ) C.C1351 ) ( 1551 ES 1 50C1967 0.00799 ) 1550 MR 1 50C1967 C. 03717 ) 1417 HO 2 22KY1967 C. 00748 I Navioula tvidentula var. pavallela Krasske Navicula tvidentula var. -pavallela Krasske, Abb. Ver. Naturk. Cassel, 56:46, pi. 2, fig. 35. 1926. 462 NATRI0FP TCT NC OF STATIONS C. 01270 I 133 Navioula tripunctata (0. F. Mull.) Bory Vibrio tripunctata 0. F. Miiller, Animal. Infus., p. 52, pi. 7, 1786. Naviaula tripunctata (0. F. Mull.) Bory, Encyclop. Method., p. fig. 2. 563. 1824. 463 NATRIPUN TCI NO OF STATI ONS 77 ( 3540 146971 CH r.H 11MY1879 23N01945 0.00932 ) 0.00065 ) 3541 46517 CH CH 1FE1881 12JA1946 0.00978 ) 0.00083 ) 46910 46914 CH CH OC1945 HAP 1946 C.0C109 1 C. 00107 ) (469C5 <4A75/. CH FV JA1947 5JN1937 0.00123 1 0.01070 ) 469C9 46764 Ch EV MR1947 17JL1937 0.00455 ) 0.01612 ) 469C6 46768 CH EV MY1947 16MR1938 C. 00066 ) C.C1470 I (46762 ( 1?41 EV n 6 18MR1938 10JN1964 0.06617 ) 0.00767 ) 1232 1243 E E 5 6 16MY1S64 13JN1964 0.00174 ) 0.CO209 1 1236 1264 C c 1 1 8JN1964 10AU1964 C. 00525 I C. 00386 1 ( 1272 1 HOI C 1 E 4 C 5 A 3 10SE1964 130C1964 0.00410 ) 0.00442 1 1273 1324 C" F 2 2 10SE1964 6N01964 C. 01075 ) 0.00233 ) 1285 1341 F A 1 3 15SE1964 19AP1967 C.C1165 ) C.CC434 ) ( 1345 1 1504 25AP1967 7fiAIJ1967 0.00195 ) 0. 00747 1 1375 1533 E A 3 4 7MY1967 1SSE1967 C. 00241 ) C.00464 1 1435 1534 C A 7 6 13JN1967 19SE1967 C.CC316 ) C.GC310 ) ( 1536 ( 1397 E 2 GS21 24SE1967 13MY1967 0.00273 ) 0.00131 ) 1378 1555 GS GS 2 2 9MY1967 3CC1967 0.00421 ) C. 00353 ) 1379 1559 GS GS 3 7 9MY1967 40C1967 C.0C309 1 C.CC699 ) ( 1565 ( 1570 GS13 OS IB 50C1967 5GC1S67 0.00507 ) 0.01983 I 1567 1571 GS15 GS19 5QC1967 6J3CJLS67 0.00159 ) C. 00117 ) 1569 1572 GS17 GS20 50C1967 60C1967 C.0C297 ) C.CCC90 ) ( 1574 ( 1546 GS22 111 1 60C1967 ?nri9A7 0.01438 I 0.015O1 ) 1575 1520 GS28 HC 1 60C1967 18SE1S67 C. 00258 ) 0.00471 1 1524 1521 M SH 1 1 2CSE1967 18SE1967 C. 04378 1 C.C1731 ) ( 1522 ( 1577 BH 1 TR 1 18SE1967 20SF1967 0.02918 1 0.00629 ) 1523 1529 RA KW 1 1 19SE1967 20SE1967 C. 00923 ) 0.02398 ) 1526 1531 MO GH 1 1 20SE1967 25SE1967 C.C6258 ) C.C4227 ) ( 1545 ( 1551 WL 1 ES 1 20C1967 50C196 7 0.02027 1 0.00799 ) 1548 1550 CA MR 1 1 30C1967 50C1967 0.02544 1 0.03717 ) 1549 1553 MO SG 1 1 40C1967 60C1S67 0.01370 ) C.0C734 ) ( 1428 ( 1417 MU 2 HO 2 29MY1967 22MY1 .67 0.03314 ) 0.02617 1 1426 1418 MS SH 2 2 29MY1S67 22MY1967 0.04199 ) 0.01555 I 1427 1350 BH 2 2 29MY1967 19AP1967 0.01211 1 C.14097 ) ( 1399 ( 1400 PW 2 SB 2 5MY1967 6MY1967 0.C068C ) 0.07148 ) 1401 1352 MC KW 2 2 6MY1967 21AP1967 0.06468 ) 0.0O859 ) 14C2 1354 TR GH 2 2 6MY1967 25AP1967 C.C1624 ) C. 00863 ) ( 1429 _1___1__22_ KL 2 ____SA__2 29. Y1967 23MY1967 0.05308 ) 0.01022 ) 1403 1423 CA WA 2 2 10MY1967 25PY1967 0.02615 ) 0. 00428 ) 1406 GB 2 13MY1967 C.0C809 ) Naviaula tripunctata var. ouneata (Lauby) comb. nov. Navioula gracilis var. cuneata Lauby, Bull. Serv. Carte Geol. France, 125:145, pi. 10, fig. 8. 1910. 464 NATRIPVC TOT NC Cf STAT ICNS_ ______ 20FF1946 OjJUIO 7 .__ __t4_LlS__ 60C1967 0.00129 I ( 1524 Ml 1 _£____ 5JM947 0.00455 ) ( 1272 10SE1964 19AP1S67 C.CC41C J C.0C661 ) Navioula tripunctata var. schizonemoides (V. H.) Patr. Schizonema neglectum Thwaites, Annals Mag. Nat. Hist., Ser. 2, 1:171, pi. 12 (J), figs. 1-4. 1848. 'Navioula gracilis var. schizonemoides Van Heurck, Syn. Diat. Belgique, p. 83. 1885. Navioula tripunctata var. schizonemoides (V. H.) Patrick, Proc. Acad. Nat. Sci. Philadelphia, 111:106, pi. 7, fig. 2. 1959. 465- NATRIPVS TCT HC CF STATICNS (46922 CH I 1557 GS 4 21AU1947 3nr.i967 0.00097 ) 0.00374 I ( 1279 ( 1558 E 1 GS 5 16SE1964 40C1567 0.00393 I 0.00396 ) ( 1346 ( Navioula tuscula Ehr. Navioula tuscula Ehrenberg, Ber. Akad. Wiss. Berlin, 1840:215. 1840. 466 NATU5aU...JXr_fct_£f_S.TJLTlC.NS._.._25... 160973 1876 0.0236? 1 ( 3541 (46917 CH (46923 CH (46743 EV (4674A _ey (46750 EV « 1541 F 7 12JA1946 _Z2.NDJLS46_ ( 1527 TR 1 U.40.1 MJC_2_ 20SE1967 „JiMJLL967_. 0.00629 ) _0„,£.C_5J6__L ( 1545 J 0.00028 I (46914 CH .._ejJJ.C_4_3.7_ J ._.6.5.2_C____C!l. 20JN1937 0.OC428 ) (46745 EV 1AU1937 fl._0_______8..._ (_4.676 3 EV 24SE1937 0.0C943 ) ( 1244 F 1 llfir.1967 C.005..7 1 ( 1565 GS13 19AP1946 20CE1946 0.00107 1 C.CO031 ) (46924 (46922 CH _______ 3J11937 23AU1937 0.02090 ) C.C4C58 ) (46757 (46752 EV EV „ 11JN1964 50C1967 0.00110 ) 0.00507 1 ( 1266 ( 1574 D 3 GS22 2CC1967 0.00676 ) ( 1550 10MY1946 21AU1S47 25JL1937 15SE1937 18AU1964 60C1967 0.00071 C.CC29_1_ C.0C481 C. 04354 0.00351 C.0C575 5CC1967 C. 01239 Navioula tuscula fo. obtusa Hust. Navioula tuscula fo. obtusa Hustedt in: Pascher, Silssw.-Fl. Mitteleuropas, Heft 10, Aufl. 2, p. 309. 1930. 134 467 NATUSCVM TCT NC CF STATIONS 17 ( 3540 f.H JUMY18J9 0.00466 ) 46763 EV 23AU1937 C.02C29 ) 1268 E 2 15AU1964 C.0C274 ) ( 1285 F 1 ( 1555_ as. 2 15SE1964 3GC1967 0.00582 1 0.00353 ) 1541 1560 E GS 2 8 U0C1967 40C1S67 0.00532 I C. 00472 ) 1394 1567 CS18 GS15 13MY196 7 50C1961 C.0C172 ) C. 00159 ) 1 1574 GS22 1 1553 SG 1 60C1967 601-.1967 0.00863 ) 0.00734 ) 1530 1426 FR MS 1 2 24SE1967 29MY1967 C. 03000 I C.01050 ) 1545 1403 WL 1 CA 2 20C1967 10MY1967 C.CC676 ) C.C1308 ) Navioula tusoula fo. rostrata Hust. Navioula tusoula fo. rostvata Hustedt in: Pascher, Silssw.-Fl. Mitteleuropas, 2, p. 308. 1930. Heft 10, Aufl. 469 NATUSCVB TOT SC CF STATIONS 10MY1967 0.C127C ) Naviaula vanheurokii Patr. Naviaula vanheurokii Philadelphia Monogr . , Patrick £n: Patrick and Reimer, Acad. Nat. Sci. 13:491, pi. 46, fig. 22. 1966. 472 NAVANFEU TCT NO CF STAT CNS 7 C 1275 0 2 1 139? GS1A 17SE1964 12MY1967 0.CC645 ) 0.00925 1 ( 1388 I 1396 GS12 GS20 12MY1967 13MY1967 0.01207 I 0.00074 ) ( 1389 ( 1554 GS13 GS 1 12MY1967 3CC1967 C.CC516 ) ( 1545 V.L I 2CC1S67 0.0C676 ) { Naviaula ventosa Hust. Naviaula ventosa Hustedt, Abh. Naturw. Ver. Bremen, 34:281, fig. 28-31. 1957. 473 NAVENTCS TCT NO CF SUT10NS 4 ( 1544 MU 1. I 1354 ' KH 2 20C1S67 25AP1967 0.00238 ) 0.00173 ) ( 1527 _1 20SE1967 C.O0629 I Naviaula ventralis Krasske Navioula ventralis Krasske, Bot. Arch., 3:197, fig. 3. 1923, 474 NAVFMRA TCT Nfl OF STATIONS I 1A50 5CC1967 0.06195 ) ( 1404 HO 2 1CHY1967 0.01270 I I Navioula viridula (Klitz.) Kutz. Frustulia viridula Kutzing, Linnaea, 8:551, pi. 13, fig. 12. 1833. Navioula viridula (Kutz.) Kutzing, Bacill., p. 91, pi. 30, fig. 47. 1844, . 475 NAUTRinil TCT KC CF STATIONS 25. 146917 r.H 12.IA1946 0.00028 I (46^23 CH 22N01946 0.00219 ) (46920 CH 200E1946 C.CCC31 ) (46907 I 1341 CH A 3 GS14 RH 1 JL1947 19AP1967 50C1967 18SE1967 0.00099 ) C. 00108 ) 0.00183 ) 0.00729 ) 146757 ( 1448 ( 1567 I 1531 EV A 6 25J11937 10JL1967 0.0CI481 ) C.CC354 ) (46747 ( 1533 EV A 4 1AU1937 19SE1967 0.0C248 ) C.0C464 ) 1 1566 I 1527 GS15 GH 1 50C1967 25SE1967 0. 00159 ) 0.01.651 ) ( 1569 ( 1545 GS17 VI 1 50C1967 20C1967 C.0C149 1 C. 00676 ) ( 1550 1 1477 MR 1 111 ? 50C1967 29MY1967 0.03717 ) 0.01211 1 1 1553 ( 1417 SG 1 HO 2 60C1967 22MY1967 0.01469 ) 0.00748 1 ( 1426 ( 1350 KS 2 BH 2 29MY1967 19AP1967 C. 05249 ) C. 01982 ) ( 1401 ' MO 2 J--1A2-2 GA 2 6MY1967 23MY1967 0.00588 ) Q.0C511 ) 25AP1967 0.00518 1 ( 1349 Navioula viridula var. avenaoea (Br&b.) V. H. Naviaula (viridula Kg. var.? J avenaoea de BrSbisson ex Grunow in: Schneider, Naturw. Beitr. Kenntn. Kaukasus lander, p. 112, pi. 4, fig. 23. 1878. Navioula viridula var. avenaoea (BrSb.) Van Heurck, Syn. Diat. Beleique p. 84. 1885. ' 135 NP OF STATinNS fi (46924 CH 10MY1946 0.00071 ) (46522 CH 21AU1947 C. 00048 ) ( 1559 GS 7 40C196 7 C.CC350 1 ( 1546 LU 1 1 1354 GH ■> 20C1967 0.00500 I 75AP1967 0.00173 ) ( 1427 1 1422 LU 2 GA 2 29HY1967 23MY1967 0.01211 ) C. 02044 ) 1 1350 i EH 2 19AP1967 C.0C881 ) Naviaula vividula var. i,%neavis Hust. Naviaula vividula var. linearis Hustedt, pi. 19, figs. 1-2. 1937. Arch. Hydrobiol., Suppl. 15:264, 478 NAVIRIVL TCI NC CF STATIONS ( 1316 I 1575 D 6 GS?8 9N01964 60C1967 0.0C378 ) 0.00129 I ( 1395 ( 1520 GS19 HO 1 13HY1967 18SE1967 0. 00117 I 0.00471 ) ( 1571 ( 1427 CS19 LU 2 6CC196 7 29HY1967 C.0CC59 ) 0.01211 ) Naviaula vividula var. vostellata (Kutz.) Cleve Navioula vostellata Kutzing, Bacill., p. 95, pi. 3, fig. 65. 1844. Naviaula vividula var. vostellata (Kutz.) Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 27(3) :15. 1895. -429 NAV1RIVR TOT NC CF STATICNS _£¥_ C. 00059 ) < 1550 N23MY1967 0.01735 ) Naviaula vulpina Kiitz. Naviaula vulpina Kutzing, Bacill., p. 92, pi. 3, fig. 43. 1844. 480 NAVULPIN TCT rvC OF STATIONS Naviaula wittvoakii (Lagerst.) A. Cleve Stauvoneis wittvoakii Lagerstedt, Bih. K. Svenska Vet.-Akad. Handl., 1(14) :38, pi. 2, fig. 15. 1873. Naviaula wittvoakii (Lagerst.) A. Cleve, Soc. Sci. Fennica Comm. Biol. 4(14) :86. 1934. 481 NAWITTRC TCT NC CF STATICNS 1285 1565-- F 1 GS13 15SE1964 ^_5JC19»I_ 0.00582 I 0.01014 ) ( 1389 f 1567 GS13 GS15 12PY1967 50C1967 0.00258 ) C. 00159 ) ( 1396 ( 1571 GS20 GS19 13MY1967 6CC 196 7 C.0C074 I C.0C059 ) Naviaula zanoni Hust. Naviaula zanoni Hustedt, Inst. Pares Nat. Congo Beige, Expl. Pare. Nat. Albert, (Damas 1935-1936), Facs. 8:92, pi. 5, figs. 1-5. 1949. 485 NASPECGE TCT NC CF STATIONS 35 1285 JAQ5_ 1346 JJAS_ . E 2 F 3 C 7 GS12 152 0 HO 1 J426 US 2 22N01S46 11JN1964 0.00219 ) 0.0C987 ) 14JL1964 6.111964 0.01282 ) 0.02674 ) 15SE1964 _l_LQ£196Al 0.01747 ) 0.00173 ) 21AP1967 12WY1967 13MYIS67 50C1967 0.00134 ) 0.02413 ) C. 00688 ) 0.00159 I 18SE1967 _29J1Y1_967__ 0.0C471 ) 0.01050 ) 1229 „L2A5_ 1258 1268 1287 _132J_ 1564 1547 1527 X4C3 C 5 F 2 F 1 E 2 F 3 GS12 WS 1 TR 1 CA 2 14MY1964 0.C0423 I 11JM964 0.01383 ) 6JL1964 15AU1964 C.C0944 I 0.00274 ) 15SE1564 6N01964 C.005OO I C. 00418 ) 0.00239 ) 50C1967 20C1967 C. 00165 ) 0.00798 ) 20SE1967 10MY1967_ C.CC629 ) 0.05231 I 1439 1246 S 6 F 3 5JN1964 11JM964 C.CC200 ) C.C1793 I 1259 1284 F 2 f. 6 6JL1964 17SE1564 C.C2479 ) 0.CC635 ) 1302 _1324_ E 5 F 2 130C1964 6N01964 1383 J393_ CS 7 _GS17_ 10MY1967 13HY1967 C.CC405 ) C. 00466 ) C.0C535 ) 1566 1546 GS14 LU 1 5CC1967 20C1967 C.CC163 ) C.0C500 ) Naviaula (vividula var.?J Species inaevtae sedis 136 _4JX._MAV1RIV6 TCT NC Of STATIONS 18SE1967 0.00577 ) ( 1522 22MY1967 0.00374 ) ( 16SE1967 0.02370 ) ( 1550 Navioula (tuscula var. 1) 468 NATUSCVA TCT NC OF STATIONS Navicula (tuscula var. 3) 471 NATUSCFR TCT NO OF STATIONS 5JN1937 0.00357 ) 19AP1967 0. 00220 ) Navicula sp. Caff. N. lacustris) .. vn NAI ACUSC TCT NO OF STAT1CNS 12 CH 1CPV1946 0. 00071 ) (46920 20CE1946 C. 00031 ) (46916 (46906 CH __LJSA6. m_ MY1947 _2PC1S*7 0.00133 ) 0.0100C ) (46922 ( 1521 CH SH 21AU1947 18SE1967 0. 00388 ) 0.00577 1 ( 1544 KU 1 ( 1527 TR 1 20C1967 20SE1967 0.00238 I C.C6918 I 20SE1967 0.01199 ) Navicula "pygmaea var. pvoducta" (not validly described) 43 5 NAPy?""P TOT NO OF STATIONS 3 .1 1764 C 1 10A1I1964 0.00193 ) ( 1533_ 19SE1967 0.00464 I 1 1396 C.0C074 ) Navicula sp. #3. 483 NASPECOC TCT NC OF STATIONS Navicula sp. #4. 484 NASPECOO TOT NO OF STATIONS 12MY1967 0.00603 1 ( 1565 Navicula sp. #8. 486 NASPFCQH TOT KC CF STATIONS 11 J4690Z CH I 1545 WL 1 _1_L4 2.8 HiLi. < 1350 BH 2 20C1967 _2SMYJL9feZ_ 0.10812 I _OjflOJfll_l. ( 1552 Sf 1 _(_14_26_ MS 2 ( 1402 TR 2 60C1967 0.01321 ) 29HY1967 C. 01050 ) ( 1550 ( 1427 KR 1 IU 2 50C1967 _29MV_19_6J_ C.C3717 ) C.C6053 I Navicula sp. #10. 488 NASPECGJ TCT NC OF STATIONS 1 1 134 3 A 6 1SAP1967 C.0CC69 ) ( Navicula sp. #12. 49C NASPECCL TOT NO CF STATIONS (46919 I4677T CH FV 5JN1947 9JL1937 0.27162 1 0.02385 ) (46758 (46764 EV EV 5JN1937 17JL1937 0.0C713 1 0.20951 ) (46743 (46757 EV EV 20JN1927 25JL1937 C.CC428 ) (46747 146750 EV FV 1AU1937 24SE1937 0.00743 ) 0.01414 ) (46763 (46748 EV EV 23AU1937 130C1937 0.16234 ) 0.10675 ) (46752 (46767 (46762 1 1258 EV EV EV F 1 15SE1937 270C1937 18MR1938 6JL1964 C. 17414 ) 0.01160 ) C.C2206 ) (46749 146751 EV EV 12MR1938 30MR1938 0.01214 ) 0.01117 ) (46768 (46761 EV EV 16MR1938 27MY1938 0.10290 ) 0.00818 ) ( 1260 F 3 6JL1964 0.00191 ) ( 1540 C 5 40C1967 C.C0496 ) ( 1541 E 2 110C1967 C.C1597 1 137 1394 GS18 13MY1967 0.00172 1 1 1554 GS 1 30C1967 C.CC356 1 ( 1559 ( 1544 GS 7 HIJ 1 40C1967 20C1S67 0.00350 ) 0.00715 I 1565 1547 GS13 MS 1 50C1967 20C1967 0.01014 ) 0.00798 I ( 1574 ( 1546 GS22 LU 1 60C1967 20C1567 0.00863 ) C. 04001 ) ( 1526 HO 1 Ul. 1 • 20SE1967 7CC1567 0.01138 ) 0.02703 ) 1527 1551 TR 1 ES 1 20SE1967 50C1967 0.00629 ) 0.01598 ) ! 1529 ( 1552 KM 1 SH 1 20SE1967 6CC1967 0.02398 ) C.OC660 ) ( 1550 'MR 1 50C1967 0.02478 ) Navicula sp. #13. 491 NASPECCM TCT NO OF STATIONS (46747 ( 1527 EV TR 1 1AU193T 20SE1967 0.00248 ) 0.00629 ) ( 1285 ( 1403 F 1 CA 2 15SE1964 10MY1967 0.00582 I 0.01308 ) ( 1565 GS13 50C1967 C.C1521 I Navicula sp. #14. 49? NASPFCflN TCT NO OF STATIONS ( 1286 .F 2 15SE1964 0,01095..] ( 1527 20SE1567 0.01258 1 Navicula sp. #15. 493 NASPFf.nt) TCT NO CF STATIONS 1 ( 1522 BH 1 18SE1967 0.0054'' ) ( Navicula sp. #18. 495 NASPECOR TCT .NC CF STATICNS- I 1545 WL 1 2CC196 7 0.OC676 ) Navicula sp. #19. 14*971 (46914 r.H CH r.H ?™ni945 19AP1946 700F1946 CI. 00065 ) (46517 CH 12JA1946 0.00166 ) (46915 CH 20FE1946 C.0C569 1 0.00107 ) 0.00092 ) (46924 (46519 CH CH 10MY1946 5JN1947 0.00141 ) 0.00455 ) (46923 (46922 CH CH 22N01946 21 All 1947 0.00219 ) 0.00145 1 (46764 . 146744 ( 1387 EV FU GS11 GS13 17JL1937 0. 00806 I 0.00975 1 (46747 (46168 EV EV 1AU1937 16MR1938 0.00248 ) 0.01470 ) (46763 (46762 EV EV 23AIU937 18HR1938 C. 02029 ) C. 02206 ) 12MY1967 5nr.l96 7 0.00396 ) 0.02028 ) ( 1388 ( 1566 GS12 GS14 12MY1967 50C1967 C. 00603 ) 0.00183 1 ( 1556 ( 1567 GS 3 GS15 30C1967 50C1967 C. 00521 ) C.0C159 ) I 1574 1 1550 GS22 MR 1 60C1967 50C1967 0.01151 ) 0.01239 ) ( 1546 ( 1351 LU 1 Ml 2 20C1967 21AP1967 C. 02001 I 0.00310 I ( 1531 ( 1350 GH BH 1 2 25SE1967 19AP1967 0.00845 ) C.CC220 ) Navicula sp. #22. 498 NASPECOV TOT NO CF STATIONS CH MY1947 0.00066 ) ( 1285 15SE1964 0.00582 ) ( Navicula sp. #23. 499 NASPECOU TCT NO OF STATIONS . 15 146758 (46750 EV EV 5JN1937 24SE1537 0.00713 ) 0.00471 ) (46764 (46767 EV EV 17JL1S37 270C1937 C.C08G6 ) 0.00387 ) (46763 (46762 EV EV 23AU1937 18MR1538 C.1C146 ) 0.06617 ) ( 1451 ( 1545 C 7 UL 1 16JL1S67 2C1C1967 C.0C197 ) 0.08109 1 ( 1542 ( 1550 E 3 MR 1 11CC1967 5CC1967 C. 00509 ) 0.01239 ) I 1546 ( 1426 tu 1 MS 2 20C1967 29MY1967 C.C1000 ) C. 02100 ) ( 1354 GH 2 25AP1967 0.00173 ) ( 1407 SM 2 14MY1S67 0.00597 ) ( 1423 HA 2 25MY1S67 C.CC428 1 Navicula sp. #24. 500 NASPECOX TGT NO OF STATIONS (46917 CH ( 1537 E_3_ 12JA1946 0.00028 ) 24SE1967 0.00431 ) (46907 ( 1541 CH E 2 JL1947 H0C1967 C.00C49 1 C.00532 I (46743 ( 138 Navieula sp. #25. 501 NASPFf.CY TCT NO OF STATIONS 1 L1541 E__2 UGJLiafU (UMS32_J L. Navieula sp. #26. _50_2 NASPFm? TOT NC CF STATICNS 1 1 46906 CH MY1947 C. 00066 ) L_ Navieula sp. #27. S03 KASPFr.ta TfIT no OF STATICNS 5_ ..IA69-L0 CtL nr.1945 0.00109 ) UttOiA ejl ( 1390 GS14 12MY1967 0.00587 ) ( 1545 WL 1 17JL1937 C. 01612 ) (46763 EV 20C1967 0.00676 I ( _23AU1937 C. 04058 ) Navieula sp. #29. 504 NASPECAC TCT. NO OF STATICNS (46757 EV 1-15A4 W1_L 25JL1937 0.0C481 ) (46752 EV .._ZfltlS6J (UQOSIUL ( 15SE1S37 C. 02177 I (46768 EV 16HB193S C.C147C ) Navieula sp. #30. i05 NASPFC.AQ TCT MO OF STATICNS 1 L4675J £1L 25JL1937 C.CC481 ) Navieula sp. #31. 5J)6__. NASPECAE TCT NO OF STATICNS (46758 FV 5JM937 0.0C357 ) ( Navieula sp. #32. 507 NASPECAF TOT NO CF STATICNS 1 liAlil EJL 270C1937 0.0C387 I ( Navieula sp. #33. _*IH».. NASPKAr. TrT Nil OF STATICNS 1_ JLi&IiJ EJL 23AU1937 0.02C2S ) ( Navieula sp. #34. 509 NASPECAH TOT NC CF STATICNS -L-1389 GJSI3-. ( 1350 BH 2 12WY1967 C. 00258 ) ( 1574 GS22 19AP1967 0.00220 ) I 1400 SB 2 60C1967 0.00288 I ( 1550 PR 1 6MY1967 0.00596 I ( 1429 Wl 2 50C1967 C.C1239 ) 29MY1967 C. 01062 ) Navieula sp. #35. 510 NASPECAI TCT l\C OF STATICNS 1 t 1554 GS 1 3CC1S67 0.00356 ) ( Navieula sp. #36. 511 NASPECAJ TCT NC Of STATICNS 2 i 1565 GS13 5CC1967 0.01014 I ( 1546 Lt 1 20C1967 C. 00500 ) ( 139 Navioula sp. #37. 512 NASPECAK TCT NO OF STATIONS 1 < 1565 GS13 50C1967 0.00507 I ( Navioula sp. #38. 513 NASPECAL TCT NO OF SHUCKS 2 ( 1565 GS13 50C1967 0.0*056 ) ( 1350 BH 2 19AP1967 0.00661 ) ( Navioula sp. #39. 51* NASPECAM TCT NO OF STATIONS 2 ( 1565 GS13 50C1967 0.01521 ) I 1350 BH 2 19AP1967 0.00**1 1 ( Navicula sp. #40. 515 NASPECAN TCT NC CF STATIONS 3 < 1567 GS15 50C1967 0.00159 ) ( 1*26 MS 2 29MY1S67 C.01050 ) ( 135* GH 2 25AP1967 C.0C173 ) Navioula sp. #41. 516 NASPECAC TCT NC OF STATIONS 1 I 157*. GS22 60C1967 0.0028B ) T Navioula sp. #42. 517 NASPECAP TCT NC CF STATIONS 1 I 15*6 LU 1 2CC1S67 0.CC500 ) T Navioula sp. #43. 518 NASPECAO TCT NO OF STATIONS 6 T~1526 nTI 20 SE 196 7 6700569 ) I 1527 TR 1 20SE1967 C. 00629 I I 1550 XR 1 I 1417 Hn P 72MY1967 0.0037* I ( 1350 BH 2 19AP1967 0-00220 > <_l*02 Ig_2_ 50C1967 C.C3717 t 6HY1967 C. 005*1 ) Navioula sp. #44. 519 NASPECAR TCT NO OF STATIONS 2_ I 15*5 WL 1 20C1967 C. 10136 I < 1350 BF 2 1SAP1S67 C. 00220 ) 1 Navioula sp. #45. 570 NASPECA'S TCT NO OF STATIONS 1 ( 15*5 ML 1 7CC1967 0.00676 ) ( Navioula sp. #46. JL2J NASPECAT TCT NP CF STATICNS 2 ( 15*5 UL I 20C1967 C.CC676 1 ( 1350 BH 2 15AP1967 0.C0220 ) ( Navioula sp. #47. 522__ NAS_PiCAlJ_JUll_llCLO_F_JXAIiaNi 1 J- 1550 HR 1 50C1S67 0.01239 1 1 Navioula sp. #48. _5J2i_N.AjP-Ei;AV__U;j_MJ_C_F_S.lAXlCN_S 1 [ 1550 MR 1 50C1967 0.01239 ) 1 140 Navioula sp. #49. 52.4._HAiB£tAfcLJUU_NQ_Qt._S14U0NS I _ I l-SSC) HR 1 5CC1967 0.04956 ) ( Navioula sp. #50. . S75 NASPECAX TOT KC CF STATIONS 1 I l*sn MR 1 5GC1967 0.0123; I ( Navioula sp. #53. 527 NASPECBA TCT NO CF STATIONS 1 J_125J] ati_2 19AP1967 0. 00441 ) [ Navioula sp. #54. 52J__NAiP££Se__ttULJN£L£F_SIAIl£N5 2 I 1350 BH 2 19AP19t7 C.CC220 ) [ 14C5 ES 2 12MY1967 0.006*5 ) < Navioula sp.-#55. 52? NASPECBC TCT NO OF STATIONS 2_ < H22 GA 2 23MY1967 C. 01022 I I 1423 DA 2 25KY1967 0.00428 I 1 141 Genus Neidium Pfitz. Pfitzer, Bot. Abh. Geb. Morph. Physiol., 1(2) :39. 1871. In most instances members of the genus Neidium comprise a minor compo- nent of epipelic communities in freshwater. Probably none of the species may be classified as euplanktonic but occasional specimens are found in plankton collections. Members of the genus are very rare in our collections, and those noted come from nearshore localities. Neidium affine (Ehr.) Pfitz. Navioula affinis Ehrenberg, Abh. Akad. Wiss. Berlin, 1841:417, pi. 2(2), fig. 7. 1843. Neidium affine (Ehr.) Pfitzer, Bot. Abh. Geb. Morph. Physiol., 1(2) :39. 1871. 53C ._N.EAF£_Ih£_Ifll_JUL_C£__ST£lI£NS -7— _ (46909 f.H HR1947 0.0C455 I (469C6 Ch PY1947 C.OOO66 I (46758 EV 5JMS37 C. 01426 ) (46747 EV 1AU1937 0.CC248 ) (46752 EV 15SE1937 0.04354 ) (46762 EV 18HR193E C.C2206 ) (46759 EV ._ l?rYl_!3 8_.. 0.CC338 ) ( Neidium affine var. humerus Reim. Neidium affine var. humerus Reimer, Proc. Acad. Nat. Sci. Philadelphia 111:12, pi. 4, fig. 3. 1959. 531 NFAFF1VH TCT NC OF STATICNS 4 J (46764 ... EV 17JL1937 C.CC8C6_)_ (46765 .....EV 3CAU1937 0.00558 ) 146762 EV 18HR1S38 C.C.22C6 I 1 1565 GS13 5CC1967 0.00507 ) ( " "" Neidium hinode (Ehr.) Hust. Navioula binodis Ehrenberg, Ber. Akad. Wiss. Berlin, 1840:212. 1840. Neidium binodis (Ehr.) Hustedt, Arch. Hydrobiol., 40:933. 1945. 532 NEBINCDE TCT NC OF STATICNS 1 (46757 tV 25JL1937 "c.CC^Sl ) I Neidium bisulaatum (Lagersc; uxeve Navioula bisuloata Lagerstedt, Bih. K. Svenska Vet. -Akad. Handl., 1(14) :31, pi. 1, fig. 8. 1873. Neidium bisuloatum (Largerst.) Cleve, K. Svenska Vet. -Akad. Handl., Ny Foljd, 26(2) :68. 1894. 533 NEBISULC TCT NC CF STATIONS 1 ( 1350 BH 2 154P1967 0.00220 I ( Neidium bisuloatum var. baioalense (Skv. and Meyer) Reim. Neidium bisuloatum fo. baioalensis Skvortzow and Meyer, Proc. Sungaree River Biol. Sta., 1(5) :14, pi. 1, fig. 50. 1928. Neidium bisuloatum var. baioalensis (Skv. and Meyer) Reimer, Proc. Acad. Nat. Sci. Philadelphia, 111:18, pi. 2, fig. 2. 1959. 534 NEBISVBC TOT NC CF STATICNS 1 (46758 EV 5JN1937 0.CC357 I ( Neidium oalvum 0s tr. Neidium oalvum 0strup, Danske Diat., p. 20, pi. 1, fig. 11. 1910. 142 535 NECALVUf TCT ivC CF STATIONS 1 (46760 EV 22SE1S37 0.0C492 ) ( Neidium dubivm (Ehr.) Cleve Navicula dubia Ehrenberg, Phys. Abh. Akad. Wiss,. Berlin, 1841:418, pi. 2(2), fig. 8. 1843. Neidium dubivm (Ehr.) Cleve, K. Svenska Vet. -Akad. Handl., Ny Foljd, 26(2) :70. 1894. 536 NEDUBIUM TCT NC CF STATIONS (46909 CH WU947 0.00455 ) ( 1258 F 1 6JL1964 C.0O236 ) ( 1522 8h 1 18SE1967 C. 00182 ) Neidium dubium fo. constrictum Hust. Neidium dubium fo. constricta Hustedt in: Pascher, Sussw.-Fl. Mitteleuropas, Heft 10, Aufl. 2, p. 246, fig. 384b. 1930. 537 NEDU8IFC TOT NO OF STATIONS 9 ""F 3540 CH 11MY1879 0.00466 ) F46758 EV 5JN1937 0.00713 1 (46768 EV UMR1938 CO 1470 ) (46756 EV Z 7AP1 938 0 .0C168 ) ( 1240 0 6 10 JN1964 0. 00153 I i A56£ C SJ.6 5CC1967 C.CC144 ) 1 1574 " GS22 6CC1967 0.01151 ) ( 1427 LU 2 25>Y1967 0.01211 ) ( 14C7 SH 2 14MY1967 0.0C597 ) Neidium iridis (Ehr.) Cleve Navicula iridis Ehrenberg, Abh. Akad. Wiss. Berlin, 1841:418, pi. 4(1), fig. 2. 1843. Neidium iridis (Ehr.) Cleve, K. Svenska Vet. -Akad. Handl., Ny Foljd, 26(2):69. 1894. 538 NEIRICIS TCT NO GF STATIONS ( 1426 PS 2 29KY1967 0.0105C ) ( Neidium iridis var. amphigomphus (Ehr.) A. Mayer Navicula amphigomphus Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:417, pi. 3(1), fig. 8. 1843. ^ Neidium iridis var. amphigomphus (Ehr.) A. Mayer. Denkschr. Bayer. Bot. Ges. Regensburg, 13:30. 1917. 539 NEJB1CVA TCT NO OF STATICNS I 7 1567 GS1 5 50X1967 oTcTl 5?T (" Neidium irid^is var. vernalis Reichelt Neidium iridis var. vernalis Reichelt, Sitzungsber. Naturf. Ges. Leipzig, 24:8. 1897. 540 NESPECCB TCT fvC CF STATIONS 8 (46915 CH 20FE1946 0.00569 ) (469C9 CH MR1947 0.00911 ) (469C7 Ch JL1947 C.0C049 ) (46758 EV 5JN1937 0.0C357 ) (46764 EV 17JL1937 0.00806 ) (46757 EV 25JL1937 C.CC481 ) (46747 EV 1AU1937 0.00743 I ( 1565 GS13 50C1967 C. 00507 ) ( Neidium kozlowi Mereschk. Neidium kozlowi Meres chkowsky, Arb. Exped. Kais. Russischen Geogr. Ges., 1899-1901, Vol. 8, p. 16, fig. 7. 1906. 544 .. NESPECCF TCT NO OF STATIONS 1 ( 1388 SSl2 1PHY1967 n.act-m 1 ( 143 Neidium ladogense (Cleve) comb. nov. Navicula ladogensis Cleve, Acta Soc. Fauna Fl» Fennica, 8(2) :35, pi. 2, fig. 3. 1891. Coll: 1388. Neidium saooense Reim. Neidium saooense Reimer in: Patrick and Reimer, Acad. Nat. Sci. delphia Monogr., 13:402, pi. 37, fig. 3. 1966. Coll: 1813. Species inoevtae sedis Phila- Neidium sp 541 NESPECGC TCT . #3. _____ ..__.__._ _______ ___ (60973 CH C469i0 CH 1S76 0.04724 ) _. ._2_Q_J____ 0._0_0.0.3_1.__.>. 25JL1937 0.OC481 ) 11GC1967 0. 00532 ) 2CC1967 0.00238 1 74SE1967 C. 01000 ) ( 3541 (46758 CH EV 1FE1881 5JN1937 C. 00978 ) C. 00713 ) (46923 (46770 CH EV 221.01946 9JL1937 C.CC219 ) C.0C596 ) (46757 EV (1541 E 2 (46763 ( 1571 ( 1521 ( 1545 EV GS19 23AU1937 60C1967 C.04058 ) C. 00059 ) (46752 ( 1575 EV GS28 15SE1937 60C1967 C. 02177 ) C.CC129 ) ( 1544 MU 1 ( 1530 FB 1 SH 1 ML 1 18SE1967 2CC1967 C.0C577 ) C. 00676 1 ( 1527 ( 1553 TR 1 SG 1 20SE1967 60C1967 C. 02516 ) C.CC734 ) Neidium sp. #4. 542.. .RE.S_E_____I_CJ___C_.0_E STATION 2. (46747 £__ 1AU1937 0.0C248 ) 16MR1936 C.C1470 ) Neidium sp. #5. 543 KFSPECOE TOT NC CF STATICNS 17JL1937 C.0C8C6 ) ( Genus Nitzsohia Hass. Hassall, Hist. British Freshw. Alg., Vol. 1, p. 435. 1845. The members of the genus Nitzsohia occurring in Lake Michigan are found in a variety of habitats. Although the greatest number of species are found in benthic environments, a number of species are apparently euplanktonic. Be- sides the euplanktonic species, many of the entities that find their primary habitat in epipelic communities are successful facultative planktonts and are regularly taken in plankton collections, usually in low numbers. Nitzsohia aoioularis (Ktitz.) Wm. Smith Synedra aoioularis Kutzing, Bacill., p. 63, pi. 4, fig. 3. 1844. Nitzsohia aoioularis (Kiitz.) Wm. Smith, Syn. British Diat., Vol. 1, p. 39, pi. 13, fig. 108. 1853. ___A5 MAC1CU1. TOT Nt) RE STATinHS _j (46906 CH MY1947 0.00066 ) 46764 _v 17JL1937 0.02417 ) 1231 E 3 16.U964 C.CC489 ) 1 1439 ( 1243 8 6 E 6 5JN1964 13JN1964 0.00799 1 0.00209 ) 1238 1246 D F 3 3 11JI.1964 11JM964 C. 00400 ) C.CC598 ) 1241 1252 E 2 C 1 13JN1964 16JL1964 0.CG148 ) C.0C279 ) « 1257 ( 1260 E 3 F 3 14JL1964 6JL1964 0.00479 ) 0.00191 ) 1258 1340 F C 1 7 6JL1964 28MR1967 0.00944 ) C. 00073 ) 1259 1449 F 2 C 3 6JL1964 16JL1967 0.01549 ) C. 00382 I ( 1450 I 1550 C 5 MR 1 16JL1967 50C1967 0.00190 ) 0.03717 ) 1546 1426 LU MS 1 2 20C196 7 29MY1967 0.00500 ) C. 01050 ) 1551 1350 ES 1 EH 2 50C1967 15AP1967 C. 00799 ) C.CC22C ) ( 1401 ( 1349 MO 2 CI 2 6MY1967 19AP1967 0.01176 1 0.0C359 ) 1353 FR 2 23AP1967 C. 01055 I 1354 GH 2 25AP1967 C.0C345 ) Nitzsohia acuta Hantz. Nitzsohia acuta Hantzsch ex Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl. , Ny Foljd, 17(2): 90. 1880. 144 Itb BUI LUIA 1876 0.04724 ) ( 3541 CH 1FE1881 C. 00978 ) (46910 CH 0C1945 C.0C109 1 (46921 CH CH 23N01945 19AP1946 0.00388 ) 0.00747 1 (46517 (46 524 CH CH 12JA1946 10HY1946 0.00111 I 0.00282 ) (46915 (46923 CH CH 20FE1946 22N01946 C.C1138 ) C.0C219 ) (46920 CH 20DE1946 4MY1947 0.00031 1 0.00407 ) (46905 (46906 CH CH JA1947 MY1947 0.00123 ) 0.00597 1 (469C9 (46919 CH Ch MR 1947 5JN1947 C. 01366 I C.C1366 ) (46907 (46771 (46757 (46759 ( 1439 CH EV EV EJL B 6 JL1947 11JN1937 25JL1937 19MY1938 5JN1964 0.00937 1 0.01664 1 0.00481 I 0.01013 ) 0.02198 1 0.0C279 ) (46522 (46743 CH EV 21AU1947 20JN1937 0.00145 ) 0.02997 ) (46758 (46770 EV EV 5JN1937 9JL1937 C.C2853 1 C.0C596 ) (46747 (46761 EV EV 1AU1937 27MY1938 0.00248 I C. 01363 I (46756 ( 1233 EV B 3 27AP1938 5JN2964 C0C336 I C.C0238 I ( 1441 ( 1255 B C 6 5 24JL1964 15JL1964 C. 00441 ) 0.00513 ) ( 1250 ( 1256 C E 6 2 10JL1564 14 JL 1964 C.C1233 ) C.C2565 ) ( 1257 ( 1760 ( 1285 ._L_12SI_ - ( 1305 E F F 0 F E 3 1 6 2 3 14JL1964 6JL1964 15SE1964 14CC1S64 110C1964 7N01964 0.00718 ) 0.01528 1 0.01747 I 0.00190 ) ( 1258 ( 1771 ( 1286 ( 1302 F C F E 1 7 2 5 6JL1964 22SE1964 15SE1964 130C1964 C.C1180 ) C. 00653 I C. 01095 ) 0.02429 ) ( 1259 ( 1284 ( 1290 ( 1304 F E C" F 2 6 1 1 6JL1964 17SF1964 160C1964 11CC1964 C.CC930 ) f.r?542 ) C.CC379 i C.CC988 ) C. 01035 ) 0.00524 ) ( 1306 ( 1321 F E 3 5 110C1964 7N01964 0.01940 ) 0. 00638 ) ( 1311 ( 1322 D E 1 6 6N01964 '7N01564 C.CC258 ) C.C2C00 ) ( 1323 F 1 6N01964 28KR1967 0.00279 1 0.00624 ) ( 1337 ( 1340 C C 3 7 2HR1967 28MR1967 0. 00147 ) 0.00436 ) ( 1338 ( 1341 C A 3 3 28MR1967 19AP1S67 C. 00529 ) C.0C542 ) ( 1342 ( 1348 A E 4 5 19AP1967 23AP1967 0.00361 ) C.0C960 ) 1 1343 ( 1368 A A 6 3 19AP1967 4MY1S67 0.00208 ) C. 00314 ) ( 1346 ( 1369 C A 7 4 21AP1967 4KY1567 0.00935 ) C.CC373 ) ( 1370 1 1375 ( 1410 A E A A 6 3 6 3 3MY1967 0.01151 J 0.00241 I ( 1372 ( 1376 C E 5 5 5CY1967 6HY1567 0.00355 ) 0.00281 ) ( 1374 ( 1408 E A 2 3 7MY1961 23HY1967 C.0C299 ) C. 01342 ) 24MY1967 12JN1967 0.03383 ) 0.00257 ) ( 1412 ( 1432 C A 5 4 31NY1967 13JN1967 0.00421 I 0.00766 ) ( 1415 ( 1435 E C 3 7 28MY1967 13JN1967 C.CC225 ) C. 00631 ) ( 1448 1 1381 A GS 6 5 10JL1967 10MY1967 0.00354 ) 0.00477 ) ( 1536 ( 1382 E GS 2 6 24SE1967 10CY1967 0.00273 1 0.00833 ) ( 1379 ( 1383 GS GS 3 7 9KY1967 10MY1967 C.OC309 ) C.C1604 ) ( 1386 ( 1389 GS10 GS13 12MY1567 12MY1567 0.00287 ) 0.00516 ) ( 1387 ( 1390 GS11 GS14 12KY1967 12MY1967 0.01584 1 0.00587 1 ( 1388 ( 1391 GS12 GS15 12MY1967 12HY1967 C.CC603 ) C.0C479 ) ( 1393 J. 1397 ( 1559 ( 1569 GS17 GS21 GS 7 GS17 13KY1567 0.01096 ) 0.00327 ) ( 1394 ( 1555 GS18 GS 2 13MY1967 30C1967 0.02580 ) 0.00353 ) ( 1395 ( 1557 C-S19 GS 4 13MY1567 30C1967 C.0C7O5 ) C. 00747 ) 4CC1967 50C1967 0.00350 ) 0.0C149 1 ( 1560 ( 1544 GS 8 1 40C1967 2CC1967 0.00472 ) 0.00477 ) ( 1568 ( 1520 GS16 HO 1 50C1961 18SE1967 C.0C289 ) C.CC471 ) ( 1528 SB 1 20SE1967 5CC1967 0.01444 ) C. 18585 ) ( 1551 ( 1553 ES SG 1 1 50C1967 6CC1967 C. 01598 1 0.00734 ) ( 1552 ( 1426 SH US 1 2 60C1967 29MY1967 C. 00660 ) C.C2100 ) ( 1427 1 1399 LU PW 2 7 29MY1967 5CY1967 0.01211 ) 0.00680 I ( 1417 ( 1401 HO HO 2 2 22KY1967 6MY1967 0.01495 ) 0.00588 ) ( 1425 ( 1402 RA TR 2 2 25MY1967 6AY1967 C.C1768 ) C. 00541 ) ( 1400 1 1403 ( 1407 SB CA SM 2 2 2 6HY1967 0.02383 I 0.17000 ) ( 1352 ( 1404 Kt. MC 2 2 21AP1967 10HY1967 C. 02577 J 0.01270 ) ( 1429 ( 1405 ES 2 2 29MY1967 12KY1967 C.C3185 ) C. 02580 ) 14KY1967 0.OC597 » ( 1349 CI 2 7 19AP1967 73HY1967 C. 01076 I 0.04598 1 ( 14C6 ( 1423 GB WA 2 2 13HY1967 75MV1967 0.01078 ) C. 00428 1 ( 1424 KN 2 25MY1967 0.01332 ) 1 Nitzsahia amphibia Grim. Nitzsahia amphibia Grunow, Verh. Zool.-Bot. Ges. Wien, 12:574, pi. 18, fig. 23. 1862. 547 NIAP.FHIB TCT NO OF STATIONS (46910 (46914 CH CH OC1945 19AP1946 0.00328 I 0.00320 ) (46521 (46924 CH CH 23N01945 10MY1946 C. 00388 ) 0.00141 ) (46915 (46923 CH CH 20FE1946 22N01946 C. 02845 ) C. 01530 ) (46920 (46SL6 CH CH 20CE1946 4MY1947 0.0C185 ) 0.00068 ) (469C5 (469C6 CH CH JA1947 MY1947 0.00123 I C. 00066 1 (46909 (46919 CH CH MR1947 5JN1947 C.CC911 I C.0C455 ) (46907 (46743 CH EV JL1947 20JN1937 0.00296 ) 0.0C428 ) (46522 (46770 CH EV 21AU1547 9JL1937 C. 01018 1 0.00596 ) (46758 (46764 EV EV 5JN1937 17JL1537 C.C2140 ) C. 12893 ) (46757 (46765 EV EV 25JL1937 30AU1937 0.18295 ) 0.02789 1 (46747 (46752 EV EV 1AU1937 15SE1937 0.05446 1 C. 13061 1 (46763 (46760 EV EV 23AU1937 22SE1937 C.4C584 ) C.CC985 ) (46750 14A7A2_ EV EV 24SE1937 18MR1938 0.00471 ) 0.15439 ) (46748 (46766 EV EV 130C1937 140E1538 0.10675 1 0.03169 I (46768 ( 1243 EV E 6 16MR1938 13JN1964 C. 17639 ) C. 00209 ) ( 1252 ( 1343 C 1 A 6 16JL1964 19AP1967 0.00279 ) 0.00069 ) ( 1279 ( 1383 E 1 GS 7 16SE1964 10KY1967 0.00393 ) C. 00267 1 ( 1284 ( 1557 E 6 C-S 4 17SE1964 30C1967 C.CC318 ) C. 00374 ) I 1559 ( -15_46„ ( 1545 ( 1553 GS 7 WL 1 40C156 7 2GC1967 0.00350 I 0.00500 1 ( 1566 ( 1522 GS14 BH 1 50C1967 18SE1967 C. 00183 ) 0.00365 ) ( 15 73 ( 1527 GS21 TR 1 60C1967 2CSE1967 C.CC112 ) C.C1258 ) 2CC1967 60C1967 0.0C676 ) 0.01469 1 ( 1549 _L1428__ MO 1 MU 2 4CC1967 29HY1967 0.01370 ) 0.00301 1 ( 1550 ( 1426 fR 1 ¥% 2 50C1967 29WY1567 C. 11151 I C.C1C5C 1 C.0C597 1 ( 1417 < 1406 HO 2 GB 2 22MY1967 13KY1967 0.00374 ) 0.CC270 ) ( 1350 ( Nitzsohia amphibia var. fossilis Grun. Nitzsahia amphibia var. fossilis Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17(2): 98. 1880. _5_49__. M AWPHVO TOT NO OF STATIONS 3 I 4*747 FV 1AU1937 C.0C248. 1 ( 1574 GS22 6CC1967 0.00288 1 ( 1550 PR 1 50C1967 C. 01239 ) Nitzsahia angustata (Wm. Smith) Grun. Tvyblionella angustata Wm. Smith, Syn. British Diat., Vol. 1, p. 36, suppl. pi. 30, fig. 262. 1853. Nitzsahia angustata (Wm. Smith) Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17(2):70. 1880. 145 55C NIANGUST TCT KC CF STATIC KS_ (60973 r.H 1876 0.11805 I 1 3540 CH 11MY1875 0.02796 I 1 3541 CH 1FE1881 0.28367 ) ( 3507 146915 CH 19FE1881 20FE1946 0.03396 i 0.01707 ) 146521 146514 CH CH 23N01945 19AP1946 0.02199 ) 0.00747 ) (46917 (46924 CH CH 12JA1946 10MY1946 C. 00471 ) C.0C494 ) (46923 (46909 CH r.H 22N01946 iUU947 0.06338 ) C. 01821 1 0.02731 1 0.0C357 ) (46520 (46516 CH CH 20CE1946 4MY1947 0.01356 ) 0.00170 ) (469C5 (469C6 CH CH JA1947 MY1947 C. 00735 1 C.CC596 ) (46919 146758 CH FV 5JN1947 5JN1937 (46507 (46743 CH EV JL1947 20JN1937 0.01183 1 0.00856 ) 146922 (46764 CH EV 21AU1947 17JL1937 C. 01648 ) C. 03223 ) 146757 (4*75? EV EV 25JH937 15SE1937 0.0C963 ) 0.08707 ) (46747 146760 EV EV 1AUIS37 22SE1937 C. 00990 ) 0.01477 ) (46763 (46750 EV EV 23AU1937 24SE1537 C. 30438 ) C. 04713 ) (46744 (46768 EV EV 6CC1937 16MRIS38 0.01463 1 O.C2940 ) 146748 146762 EV EV 13CC1937 18MR1938 0.04270 ) 0. 28672 I (46767 (46756 EV EV 270C1537 27AP1938 C. 04255 1 C.CC168 ) 1 1228 1 1264 D C.< 2 1 14MY1964 10AU1964 0.00195 ) 0.00193 ) 1 1258 1 127S F E 1 1 6JL1964 16SE1964 0.00236 ) 0.00393 ) ( 1259 ( 1284 F E 2 6 6JU964 17SE1964 0.C0310 1 C.0C318 1 1 1285 ( 1303 F E 1 6 15SE1964 130C1964 0.05241 ) 0.00560 ) 1 1257 ( 1304 0 F 6 1 14CC1564 110C1964 C.C0190 ) C. 00494 ) ( 1300 ( 1322 E E 3 6 130C1964 7NG1964 0.00358 I C.CC333 ) ( 1337 1 1390 C 3 GS14 2MR156 7 12HY1967 0.00147 1 0.01174 1 ( 1387 ( 1391 GS11 GS15 12PY1967 12MY1967 0.00396 ) 0.00479 ) ( 1388 ( 1398 GS12 GS22 12MY1967 14MY1967 C.0C603 ) C. 00304 ) ( 1557 1 1574 GS 4 30C196 7 fcrr.1967 0.00374 1 0.0C863 ) ( 1567 ( 1526 GS15 MO 1 5CC1967 2CSE1967 0.00159 ) 0.00569 1 ( 1572 ( 1527 GS20 TR 1 60C156 7 20SE1967 C.CC090 I 0.00629 ) ( 1529 1 1550 KW MR 1 1 20SE1967 50C1967 0.01199 ) 0.02478 ) ( 1549 ( 1553 HO SG 1 1 40C1967 6CC1967 0.01370 1 0.01469 ) ( 1552 ( 1426 SM PS 1 2 60C1967 29MY1567 0.01981 ) C.C2100 ) ( 1350 ( 1400 BH SB 2 2 19AP1967 6PY1967 0.00220 1 0.CC596 1 ( 1401 ( 1403 MO CA 2 2 6MY1967 10PY1967 0.00588 ) 0.06539 ) ( 1402 1 14C4 TR HO 2 ? 6MY1967 10MY1967 C. 00541 ) C.C127C ) ( 1407 ( 1421 SM CH 2 2 14MY1967 23MY1967 0.01791 ) 0.01735 ) ( 1349 1 1422 CI GA 2 2 19AP1967 23MY1967 0.00359 I 0.00511 ) ( 1419 ( 1423 BU WA 2 2 23MY1967 25KY1967 C. 01831 ) C.CC428 ) Nitzschia angustata var. acuta Grun. Nitzschia angustata var. acuta Grunow in: Cleve and Grunow, K. Vet.-Akad. Handl., Ny Foljd, 17(2): 70. 1880. Svenska 551 NIANGUVA TOT NO OF STATIONS 146920 _£H_ 0.00062 ) 5JN1947 C.003O3 ) 11JN1964 0.00219 ) Nitzschia apiculata (Greg.) Grun. Tryblionella apiculata Gregory, Trans. Micr. Soc. (London), n. s., 4:79, pi. 1, fig. 43. 1857. Nitzschia apiculata (Greg.) Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17 (2): 73. 1880. 552 NIAPICUL TCT NO OF STATIONS 13MY1967 0.CC27C ) Nitzschia bacata Hust. Nitzschia bacata Hustedt, figs. 30-33. 1938. 553 NIBACATA TCT NC OF STATIONS 188 Arch. Hydrobiol. Suppl., 15(3) :485, pi. 41, (60973 (46917 CH CH 1876 12JA1946 0.02362 ) 0.00166 I 4651C 46515 CH CH OC1945 20FE1946 0.00218 ) 0.01707 ) (46921 (46914 CH CH 23NC1945 19AP1946 C.CC323 ) 0.00641 1 (46924 (469JL6 CH CH 10MY1946 4MY1947 0.00141 1 0.00204 ) 46520 46506 CH CH 20DE1946 PY1947 0.0OC31 I 0.11880 ) (46909 (46919 CH CH MR1947 5JN1947 C.CC911 ) C. 14112 ) (46907 (46771 CH EV JL1947 11JN1937 0.32052 ) 0.02140 ) 46522 46743 CH EV 21AU1947 20JN1937 C. 00436 ) 0.03426 I (46758 (46764 EV EV 5JN1937 17JL1937 C.0C357 ) C.5C250 ) 146757 (46744 EV EV 25JL1937 60C1937 0.01926 ) 0.01463 ) 46747 46748 EV EV 1AU1537 130C1937 C.C1980 ) 0.02135 ) (46763 (46767 EV EV 23AU1937 270C1937 C. 08117 ) C. 00387 ) (46745 (.46761 EV fJL 12MR1538 27MY1938 0.01214 ) 0.00273 ) 46756 46766 EV EV 27AP1538 14DE1938 0.00672 ) 0.03169 ) (46759 ( 1224 EV B 4 19HY1938 18MY1964 C.CC338 ) 0.01961 ) ( 1225 ( 1228 C 0 6 2 15MY1964 14MY1564 0.C2352 1 0.14403 ) 1226 1229 C 0 7 5 16MY1S64 14MY1964 C. 05327 ) 0.11207 ) ( 1227 ( 1230 C E 2 2 13 MY 196 4 16MY1S64 0.CC548 ) C. 41488 ) I 1231 ( 1234 E B C« 0 3 3 1 4 16MY1964 18JN1964 8JN1964 UJN1964 0.34243 ) 0.00562 ) 1232 1235 E C 7 16MY1964 16JN1964 C. 73046 ) C. 00847 ) < 1233 ( 1439 B B 3 6 5JN2964 5JN1964 0.01429 ) 0.12787 ) ( 1236 ( 1239 0.C1050 ) 0.00696 1 1237 1240 0 2 6 8JN1964 10JN1964 0.06445 ) 0.04909 ) ( 1238 ( 1241 0 E 3 2 11JN1964 13JN1964 0.386CC ) C. 06062 ) ( 1242 1 1245 E F 3 2 13JN1964 11JN1964 0.01049 ) 0.12102 ) 1243 1246 E F 6 3 13 JN 1964 11JN1964 0.15451 ) C. 12550 1 ( 1244 ( 1248 F B 1 3 1 UN 1964 24JL1964 C.C6031 ) C.0C197 ) ( 1440 I 175? B f. • 6 1 11JH964 16JL1564 0.01106 ) 0.0C279 I 1441 1253 B C 6 2 24 JL 1964 16JL1964 0.00220 ) 0.00456 ) ( 1250 1 1254 C 0 6 2 10J11964 15JL1964 CO 1644 I C.CE044 ) ( 1255 ( 1258 0 F 5 1 15JL1964 6JL1964 0.02053 I 0.15103 ) 1256 1259 E F 2 2 14JL1964 6JL1964 0.15785 ) 0.02169 ) ( 1257 ( 1260 E F 3 3 14JL1964 6J11564 C. 24405 ) C.C2101 > ( 1261 ( 1268 8 E 3 2 2AU1564 15AU1964 0.00196 1 0. 03009 ) 1265 1269 C E 2 3 10AU1964 15AU1964 0.00224 ) 0.17267 ) ( 1266 ( 1270 D F 3 1 18AU1564 10AU1964 C.CC351 ) C.0C272 ) ( 1271 ( 1284 C E 7 6 22SE1564 17SE1964 0.01306 ) 0.00318 ) 1280 1285 E F 2 1 16SE1964 15SE1964 0.00681 ) 0.00582 ) ( 1281 ( 1286 E F 3 2 16SE1964 15SE1964 C.0C785 ) C.C2189 ) I 1287 L 1299_ F 3 2 15SE1964 120C1964 0.00500 1 0.00628 ) 1297 1300 0 E 6 3 140C1964 130C1964 0. 00190 ) 0.00358 ) ( 1298 ( 1302 E E 1 5 120C1964 130C1964 0.00269 ) C.CC810 1 ( 1303 ( 1306 E F 6 3 130C1964 1 ICC 1964 0.01679 ) 0.00832 ) 1304 1307 F 8 1 6 110C1964 N01964 0.00494 1 0.00361 I ( 1305 ( 13C8 F C 2 7 110C1964 6NC1564 0.00173 ) C.C0304 1 146 ( 1313 I 13?? D E 3 6 9N01964 7N01964 0.00193 1 0.01666 1 1 1310 1336 E C 2 3 7N01964 27JA1967 C. 00190 I 0.00385 ) ( 1319 ( 1337 E C 3 3 7N01964 2MR1967 C.CC524 ) C. 03674 ) ( 1338 C A 3 3 28MR1967 19AP1967 0.03835 1 0.04882 ) 1 1339 1342 C A 5 4 28MR1967 19AP1967 C. 13095 ) 0.10647 ) < 1340 ( 1343 C A 7 6 28MR1967 19AP1967 C.C4581 ) C.0C347 I ( 1344 1 1347 C E 3 2 25AP1967 23AP1967 0.01158 1 0.06178 1 1345 ( 1348 C E 5 5 25AP1967 23AP1967 0.24755 ) 0.02467 ) ( 1346 I 1368 C A 7 1 21AP1967 4MY1967 C.00534 ) C.C2199 ) ( 1370 ( 1375 A E 6 3 3MY1967 7MY1967 0.00460 ! 0.00241 I I 1372 I 1376 C E 5 5 5MY1967 6MY1967 C. 01064 ) 0.00843 I I 1374 ( 1408 E A 2 3 7MY1967 23MY1967 C.0C598 ) C.CC447 ) 1 1409 ( 1415 A E 4 3 23MY1567 28MY1967 0.00298 ) 0.00225 ) ( 1410 ( 1416 A E 6 24MY1967 28MY1967 0.01128 ) 0.00437 1 ( 1412 ( 1432 C A 5 4 31MY1967 13JN1567 C. 01263 ) C.0C255 ) C 1434 1 1447 C A 5 4 17JN1967 11JL1967 0.00299 ) 0.00234 ) I 1435 ( 1449 C C 7 3 13JN1967 16JL1967 0.00316 ) 0.01146 ) ( 1438 ( 1450 E C 5 5 14JN1967 16JL1967 C.0C363 ) C.CC571 1 ( 1451 ( 1536 c E 7 ? 16JH967 24SE1567 0.00591 ) 0.00273 ) ( 1452 ( 1538 E E 2 5 14JL1967 23SE1967 0.0021.3 ) 0.02210 1 ( 1511 ( 1379 E C-S 2 3 1SE1967 9MY1967 0.00307 ) C.C0309 » ( 1381 ( 1386 GS 5 GS10 10MY1967 12MY1967 0.01431 1 0.01149 ) ( 1383 ( 1387 GS 7 GS11 10MY1967 12MY1967 0.01337 1 C. 00792 ) ( 1384 ( 1391 GS 8 GS15 10MY1967 12MY1967 C. 01109 ) C.CC958 ) ( 1393 1 1397 GS17 GS21 13MY1967 13MY1967 0.00822 1 0.00131 ) ( 1394 ( 1398 GS18 GS22 13MY1967 14MY1967 0.05505 ) C. 00607 I ( 1395 ( 1555 GS19 GS 2 13MY1967 30C1967 C.CC117 ) C. 00353 ) ( 1557 ( 1572 GS 4 GS20 30C1967 60C1967 0.00374 ) 0.00090 ) ( 1566 ( 1544 GS14 MU 1 50C1967 20C1567 0.00183 ) 0.00238 ) ( 1569 ( 1546 GS17 IU 1 50C1967 20C1967 C.0C149 1 C. 01000 ) ( 1521 ( 1527 SH TR 1 1 18SE1967 2CSE1967 0.01154 J 0.04403 ) ( 1522 ( 1530 BH FR 1 1 18SE1967 24SE1967 0.00182 ) 0.01000 ) ( 1526 ( 1545 CO KL 1 1 20SE1967 20C1967 0.14223 ) C. 02703 ) ( 1549 ( 1550 MO MR 1 1 40C1967 J0C1967 0.01370 ) 0.65667 ) ( 1551 ( 1553 ES SG 1 1 50C1967 60C1967 0.03195 ) 1.64512 I ( 1552 ( 1428 SM 1 2 60C1967 29MY1967 0.01981 I 0. 01808 ) ( 1426 ( 1417 MS HO 2 ? 29MY1967 22MY1567 0.13648 ) 0.08599 ) ( 1351 ( 1418 MI SH 2 2 21AP1967 22MY1967 0.06206 ) 0.01555 ) ( 1427 ( 1350 III BH 2 2 29MY1967 19AP1967 C.C7264 ) C. 03084 ) ( 1399 1 1400 PH SB" 2 ? 5MY1967 6MY1967 0.01360 ) 0.04765 1 ( 1401 ( 1352 MO 2 2 6MY1967 21AP1967 0.03528 ) 0.04295 ) ( 1402 ( 1353 TR fR 2 2 6KV1967 23AP1S67 0.02707 ) C. 01055 » ( 1354 I 1404 GH MO 2 ? 25AP1967 10MY1967 0.17433 ) 0.02541 ) I 1429 ( 1405 ML ES 2 2 29MY1967 12MY1967 C. 14864 ) 0.01935 ) ( 1403 ( 1407 CA SM 2 2 10MY1967 14MY1967 C. 31385 ) C.C2986 ) ( 1349 ( 1420 CI IH 2 2 19AP1967 23MY1967 0.06466 ) 0.03021 ) ( 1406 ( 1421 G8 CH 2 2 13MY1567 23MY1967 0.00539 1 0.05205 1 ( 1419 ( 1422 BU GA 2 2 23MY1967 23MY1967 0.03662 ) C. 03065 ) 1 1423 WA 2 25MY1967 C.CC856 ) ( 1424 KN 2 25MY1567 0.05329 ) ( Nitzschia bulnheimiana (Rabh.) H. L. Smith Eomoeocladia bulriheimiana Rabenhorst, Alg. Sachsens resp. Mitteleuropas , No. 1301. 1871. Nitzschia bulriheimiana (Rabh.) H. L„ Smith, Diat. Sp. Typ., No. 689. 1874. 554 NIBULNHC TOT NO OF STATIONS (46764 „L_15£1- EV _iS_L_ 17JL1937 5flC1967 0.05641 ) 0.00799 1 (46767 _±_IS50__ EV MR 1 270C1937 50C1967 0.00774 ) 0.01239 ) ( 1536 ( 24SE1967 C.0C273 ) Nitzschia capitellata Hust. Nitzschia capitellata Hustedt in: A. Schmidt, Atlas Diat., pi. 349, figs. 57-59. 1922. __555 NIf.APITE TCT NO OF STATIONS GH 1 25SE1967 0.03381 I ( 1545 C.C0374 ) Nitzschia confinis Hust. Nitzschia confinis Hustedt, Inst. Pares Nat. Congo Beige, Expl. Pare. Nat, Albert, Miss. Damas (1935-1936), Fasc. 8, p. 145, pi. 11, figs. 49-54; pi. 13, figs. 84-90. 1949. 5S6 NlCflNFIN TflT NO OF STATIONS 99 14691(1 r.H 0C1945 0.00109 ) (46921 CH 23N01945 C. 03816 I (469C8 CH DE1945 0.02014 ) (46917 146974 CH r.H 12JA1946 10MY1946 0.00166 ) 0.00494 ) (46915 (46923 CH CH 20FE1946 22N01946 0.07398 ) 0.10928 ) (46914 (46909 CH CH 19AP1946 MR1947 0.00854 I C.C6375 I (46916 (46907 CH CH 4MY1947 JL1947 0.00407 ) 0.CC690 ) (469C6 (46513 CH CH MY1947 6AU1947 0.00796 ) 0.01046 ) (46919 146922 CH CH 5JN1947 21AU1947 C. 88770 ) C.1C468 ) (46758 (46770 EV FV 5JN1937 9JL1937 0.^6419 ) 0.01193 ) (46743 (46764 EV EV 20JN1937 17JL1937 0.04710 ) 0.49960 ) (46745 (46757 EV EV 3JL1937 25JL1937 0.02090 I C.C3370 1 (46747 (4675? EV EV 1AU1937 15SE1937 0.05446 ) 0.39182 ) (46763 (46760 EV EV 23AU1937 22SE1937 0.24351 1 0.02462 ) (46765 (46750 EV EV 30AU1937 24SE1937 C.C1115 ) C. 41476 ) ( 46744 146749 EV EV 60C1937 12MR1938 0.01951 ) 0.01214 ) (46748 (46768 EV EV 130C1937 16MR1938 0.10675 ) 0.01470 ) (46767 (46762 EV EV 270C1937 18MR1938 C. 03095 ) C. 04411 ) (46751 ( 1??9 EV D 5 30MR1938 14MY1964 0.01117 ) 0.00211 ) (46759 ( 1243 EV E 6 19MY1938 13JN1964 0.00675 ) 0.00209 ) (46766 ( 1252 EV C 1 140E1938 16JL1964 C. 11090 ) C. 01116 ) I 1?58 I 1454 ( 1384 ( 1394 ( 1560 E 5 GS 8 GS18 GS 8 15JL1964 0.00513 ) 6JUS64 0.03304 I 1 1259 14JL1964 0. 00183 ) 6JL1964 0.00310 1 ( 1260 14JL1964 C.CC718 ) ( 1266 ( 1275 D 3 D 2 18AU1964 17SE1964 0.00351 ) 0.00645 ) ( 1268 ( 1279 E 2 E 1 15AU1964 16SE1964 C. 01368 ) C. 00393 ) ■ 1271 ( 1284 C 7 E 6 22SE1964 17SE1964 C.CC653 1 C. 00318 ) ( 1285 ( 1297 F 1 D 6 15SE1964 14CC1964 0.02330 ) 0.C0190 ) ( 1288 ( 13C3 8 3 E 6 150C1964 13CC1964 0.00218 ) 0.00560 ) ( 1445 ( 1304 B 6 F 1 140C1964 HOC 1564 C.0C652 ) C.CC247 ) ( 1307 ( 1342 B 6 A 4 N01964 19AP1967 0.00361 ) 0.0C361 ) ( 1340 ( 1343 C 7 A 6 28MR1967 19AP1967 0.00145 ) C. 00069 I ( 1341 ( 1345 A 3 C 5 19AP1967 25AP1567 0.00108 ) C.CC195 I ( 1348 ( 1449 E 5 C 3 23AP1967 16JL1967 0.00137 ) 0.00764 ) ( 1373 ( 145C C 7 C 5 5MY1967 16JL1967 0.00285 1 C. 00381 ) ( 1374 ( 1453 E 2 E 3 7MY1967 15JL1567 C. 00299 ) C.C0253 ) 15JL1967 10MY1967 0.00200 ) 0.0037C ) ( 1536 I 1387 E 2 GS11 24SE1967 12MY1967 0.00545 1 C.C0396 ) 13MY1967 40C196 7 0.00688 ) C.00472 ) ( 1554 ( 1562 GS I GS1C 3CC1967 50C1967 ( 1383 ( 1391 GS 7 CS15 0.00712 ) C.C0247 I ( 1557 I 1563 GS 4 C-S 11 10MY1967 12MY1967 30C1967 5CC1967 C. 00267 _C.0C479 C.C1495 ) C.0C234 ) 147 I 1566 ( 1573 GS14 GS21 50C1967 60C1967 0.00183 ) 0.00112 ) 1569 1574 G517 GS22 5DC1967 60C1967 0.00149 1 0. 00288 ) 1571 1526 GS19 f0 1 60CI96T- 20SE1967 C.C1138 ) ( 1529 ( 1550 KM 1 MR 1 20SE1967 50C1967 0.01199 1 0.09912 ) 1545 1351 ML 1 PI 2 20C1967 21AP1967 0.00676 ) C. 00310 ) 1551 1417 es i HO 2 5CC1967 22MY1967, C.C2396 ) C.CC374 1 ( 1352 ( 1405 KW 2 ES 2 21AP1967 12MY1967 0.00859 I 0.01935 ) 1403 1349 CA 2 CI 2 10MY1967 19AP1967 C. 09154 1 0.00359 ) 1404 1422 HO 2 GA 2 10MY196 7 23MV1967 C.C127C ) C. 00511 ' Nitzsohia dentioula Grun. Nivzsohia dentioula Grunow in: Cleve and Grunow, K. Svenska Vet.-Akad. Handl., Ny Foljd, 17(2) :82. 1880. -5i8 WDiNLLC_L (46921 CH 23ND1945 C.0C129 ) (46917 CH 12JA1946 0.00028 ) (46924 CH 10MY1946 C.CC141 ) (46923 146916 CH CH CH EV EV EV 22N01946 4MY1947 JL1947 20JN1937 1AU1937 130C1937 0.00219 ) 0.00034 ) (46920 (469C6 CH CH 200E1946 MY1947 C. 00062 ) 0.00133 ) (46905 (46919 CH CH JA1947 5JN1947 C. 00245 1 C.0C152 ) (46907 L4A7A3 . 0.00148 ) 0.0C856 ) 0.03713 ) 0.04270 ) (46922 (46764 (46763 (46767 CH EV 21AU1947 17JL1937 0. 00097 ) C. 06446 ) (46758 (46757 EV EV 5JN1937 25JL1937 C.0C713 1 C.C4814 ) (46747 (46748 EV EV 23AU1937 27CC1937 0.08117 ) 0.00774 1 (46765 (46768 EV EV 30AU1937 16MR1536 0.01115 ) C.C5680 ) (46762 _ i„L25L_ EV F E F 1 1 3 18MR1938 6JL1964 16SE1964 110C1964 0.08822 ) 0.00708 ) 0.00393 I 0.00832 ) < 1243 ( 1260 E F 6 3 13JN1964 6JL1964 0.00209 ) 0.00191 ) ( 1246 ( 1270 F F 3 1 11JN1964 10AU1964 0.00598 ) C.C1C89 ) ( 1279 ( 1306 ( 12e5 ( 1320 F E 1 4 15SE1964 7N01564 0.40766 ) C.C0207 ) ( 1304 ( 1388 F 1 GS12 110C1964 12HY1967 C.0C247 1 C. 01207 1 ( 1389 ( 15-jfi GS13 GS 5 12MY1S67 4GT.196 7 0.00258 1 0.00396 ) ( 1398 ( 1564 GS22 GS12 14KY1967 50C1967 0.00304 1 0.00165 ) ( 1557 ( 1574 GS 4 C-S22 30C1967 6CC1967 C.0C374 ) C. 02013 ) ( 1526 I 1404 KO Jlfl_ 1 ? 20SE1967 10MY1967 0.00569 ) 0.01270 ) ( 1527 ( 1407 TR SM 2 20SE1967 14MY1967 0.00629 1 C. 00597 1 ( 1529 ( KW 1 20SE1967 C. 01199 1 Eitzsohia dissipata (Kutz.) Grun. Synedva dissipata Kutzing, Bacill., p. 64, pi. 14, fig. 3. 1844. Nitzsohia dissipata (Kutz.) Grunow, Verh. Zool.-Bot. Ges. Wien, 12(2) 1862. 17. 559 NIDISSIP TCT NO OF STATIONS 178 (469211 CH 23N01945 0.00129 ) 46914 CH 19AP1946 0.00107 ) (46924 CH 10MY1946 C. 00141 ] (46923 (46916 CH _CH 22N01946 4MY1947 0.0C656 1 0.00034 ) 465C5 46SC6 CH CH JA1947 MY1947 0.00245 ) 0.00265 ) (46909 (46919 CH CH MR1947 5JN1947 C. 00911 ) C. 34446 ) (46922 146764 CH FV 21AU1947 17JLI937 0.00048 ) 0.24174 ) 46758 46757 EV EV 5JN1937 25JL1937 0.04279 ) 0.04333 ) (46743 (46747 EV EV 20JN1937 1AU1937 C.CC428 1 C. 01238 ) (46763 (46762 EV FV 23AU1937 18MR1938 0.77110 ) 0.02206 ) 46752 46756 EV EV 15SE1937 27AP1938 0.08707 ) 0.00168 ) (46767 (46759 EV EV 270C1937 19MY1936 C.0C387 1 C.0C338 ) (46761 ( I??5 EV C 6 27MY1938 15MY1964 0.0C273 ) 0.00784 ) 1223 1226 B C 3 7 18MY1964 16MY1964 0.00156 ) 0.00761 ) ( 1224 ( 1227 B C 4 2 18NY1964 13MY1964 C.C1176 ) 0.00768 ) ( 1228 ( 1211 0 F 2 3 14MY1964 16MY1964 0. 02141 ) n. 14431 1 1229 123? 0 F 5 5 14MY1964 16MY1964 C. 01903 ) 0.12696 1 ( 1230 ( 1235 E C 2 7 16MY1964 16JN1964 C.C7408 ) C. 00282 1 ( 1439 ( 1239 B 0 6 4 5JN1964 11JN1964 0.03397 ) 0. 00116 1 1236 1240 C" D 1 6 BJN1964 10JN1964 0.00175 ( 0.00767 1 ( 1238 ( 1241 0 E 3 2 11JN1964 13JN1964 C. 01800 ) C.C1626 ) ( 1242 ( 1245 E F 3 2 13 JN 1964 11JN1964 0.05395 ) 0.0C692 ) 1243 1246 E F 6 3 13JN1964 11JN1964 0.00209 ) 0.01793 ) ( 1244 ( 1440 F B 1 6 11JN1964 UJL1964 0.00658 I C.CC369 ) ( 1441 ( 1256 a E 6 7, 24JL1964 14JL1964 0.00220 ) 0.02381 ) 1251 1257 C E 7 3 16JL1964 14JL1964 0.C0290 ) 0.11724 1 ( 1255 ( 1258 0 F 5 1 15JL1964 6J11964 0.00257 ) C.CC708 ) ( 1259 ( 1264 F C 2 1 6JL1964 10AU1964 0.00310 ) 0.00386 ) 1260 1268 F E 3 2 6JL1964 15AU1964 0.00764 ) 0.CO821 ) ( 1262 ( 1269 B E 3 3 17AU1964 15AU1964 C. 00210 ) 0.01096 ) ( 1270 ( 1288 F B 1 3 10AU1964 150C1964 0.00272 ) 0.00218 ) 1280 1445 E e 2 6 16SE1964 140C1964 0.00681 ) 0.00326 ) ( 1285 ( 1292 F D 1 1 15SE1964 15CC1964 C. 08153 ) C. 00373 ) . 1300 ( 1304 E F 3 1 130C1964 110C1964 0.02506 ) 0.00741 ) 1301 13C5 E F 4 2 130C1964 110C1964 0.00442 ) 0. 00518 ) ( 1302 ( 1306 E F 5 3 130C1964 110C1964 C.O081O ) C.0C277 ) ( 1315 ( 1320 D E 5 4 9N01964 7N01964 0.00910 ) 0.00207 ) 1317 1322 E E 1 6 6N01964 7N01964 0.00383 ) 0.00333 ) 1 1318 ( 1323 E F 2 1 7N01964 6N01964 C. 00761 ) C. 00418 ) ( 1336 ( 1339 C c 3 5 27JA1967 28MR1967 0.00193 ) 0.05612 ) 1337 1340 C C 3 7 2MR1967 28MR1967 0.02058 ) 0.06835 ) ( 1338 < 1341 C A 3 3 28MR1967 19AP1967 C. 16793 ) C. 12909 1 ( 1342 ( 1345 A c 4 5 19AP1967 25AP1967 0.21475 ) 0.81867 1 1343 1346 A C 6 7 19AP1967 21AP1967 0.C2918 ) 0.07344 1 ( 1344 ( 1347 C E 3 2 25AP1967 23AP1967 C.C1324 I C.C5853 ) ( 1348 < 1370 E A 5 6 23AP1967 3MY1967 0.35093 1 0.01151 ) 1368 1372 A C 3 5 4MY1967 5MY1967 0.02513 1 0.04965 I ( 1369 ( 1373 A C 4 7 4MY1967 5MY1967 C. 01118 ) C. 01141 ) ( 1374 ( 14(18 E A 2 3 7MY1967 23MY1967 0.01494 ) 0.0C894 1 1375 1410 E A. 3 t 7NY1967 24MY1967 0.00481 1 0.00564 I ( 1376 ( 1411 E C 5 3 6MY1967 31MY1967 13JN1967 14JN1967 C. 04779 ) C.0C410 ) ( 1412 ( 1433 C C 5 3 31MY1967 17JN1967 0.02525 ) 0.01292 ) 1416 1434 E C 5 e 28MY1967 17JN1967 C. 00656 ) 0.00299 1 ( 1432 ( 1438 A E 4 5 0.CC511 1 C.0C363 ) ( 1446 ( 1452 A E 3 2 11JL1967 14JL1967 0.00245 1 0.00213 ) 1449 1453 C E 2 3 16JL1967 15JL1967 0.13757 ) 0.07330 1 ( 1450 ( 1454 C E 5 5 16JL1967 15JL1967 0.03237 ) C. 00200 ) ( 1509 _1_L5A3 . C A 5 4 2SE1967 19SE1967 0.00505 ) 0.00464 ) 1512 1539 E C 3 3 1SE1967 4DC1967 0.00393 ) C. 01510 ) ( 1532 ( 1540 A C 3 5 18SE1967 40C1967 C.CC329 ) C.0C496 1 ( 1541 ( 1380 E GS 2 4 11CC1967 9MY1967 C.C1C64 ) 0.01345 ) 1378 1381 GS GS 2 5 9MY1967 10MY1967 0.00421 ) 0.C1193 1 ( 1379 ( 1382 GS GS 3 6 9MY1967 10MY1967 C.0C619 1 C.0C278 ) 1 1383 ( 1387 GS 7 GS11 10MY1967 12MY1967 0.02139 ) 0.01584 ) 1384 1391 GS 8 GS15 10KY1967 12MY1967 0.02588 ) 0.01437 ) ( 1386 ( 1392 GS10 CS16 12MY1967 12MY1967 C.C2585 ) C.0C308 1 ( 1393 ( 1397 GS17 GS21 13MY1967 13MY1967 0.01096 ) C. 00065 ) 1394 1555 GS18 GS 2 13MY1967 3CC1967 0.16170 ) 0.00706 1 ( 1395 ( 1556 GS19 CS 3 13MY1967 30C1967 C.0C822 ) C.CC521 ) ( 1557 ( 1560 GS GS 4 8 30C1967 40C1967 0.01868 1 0.0C472 ) 1558 1562 GS 5 GS10 40C1967 50C1967 0.03567 1 0.00247 1 ( 1559 ( 1565 GS 7 GS13 40C196 7 50d967 C.0C350 ) C.CC507 ) ( 1568 ( 1544 GS16 MU 1 SH 1 NO 1 50C1967 20 CI 967 0.00289 ) 0.01430 ) 1570 1524 GS18 MI 1 50C1967 20SE1967 0.00992 ) 0.02189 I ( 1573 ( 1546 GS21 LU 1 60C1967 20C1967 C.0C112 ) C. 28510 ) ( 1521 ( 1526 18SE1967 20SE1967 0.02885 ) 0.01138 ) 1522 1527 BH TR 1 1 18SE1967 20SE1967 0.00547 ) 0.04403 1 ( 1525 ( 1528 PW SB 1 1 20SE1967 20SE1967 C. 01393 ) C. 02888 I ( 1529 -1 liSl KW FS 1 1 20SE1967 5CC1967 0.02398 ) 0. 02396 ) 1530 1550 FR MR 1 1 24SE1967 50C1967 C. 03000 ) C. 26019 ) ( 1545 ( 1553 WL SG 1 1 2CC1967 60C1967 1.51362 1 C.CC734 1 148 ( 1428 ± 1422_ CU 2 LU 2 29MY1967 29MY1967 0.01808 ) 0.06053 ) 1426 1417 MS 2 HO 2 29MY1967 22MY1967 C. 29396 1 0.03365 ) 1351 1350 CI EH 2 2 21AP1967 19AP1967 C. 01241 ) C. 03744 ) ( 1399 PW 2 GH 2 MO 2 GB 2 5MY1967 25AP1967 0.01360 ) 0.00173 ) 1400 1429 SB 2 ML 2 6KY1967 29MY1967 C. 02978 ) 0.02123 ) 1352 1403 KW CA 2 2 21AP1967 10HY1967 C.0C859 ) C. 14385 ) ( 1404 10MY1967 13MY1967 0.02541 ) 0.00270 ) 1405 1419 ES 2 BU 2 12MY1967 23MY1967 0.01290 ) 0.01831 ) 1349 1423 CI MA 2 2 19AP1967 25MY1967 C.CC718 ) C. 02997 1 ( 1424 KN 2 25CY1967 0.01332 1 Nitzsehia dissipata var. media (Hantz.) Grun. Nitzsehia media Hantzsch, Hedwigia, 2:40, pi. 6, fig. 9. 1853. Nitzsehia dissipata var. media Grunow in: Van Heurck, Syn. Dlat. Belgique, p. 178, pi. 63, fig. 4. 1885. 560 NIOISSVM TOT NO OF STATIONS 40 (46770 EV GS 2 9JL1937 30C1967 0.01193 1 ( 0.00353 ) ( 46768 1557 EV GS 4 16MR1938 30C1967 0.11760 ) 0.00374 ) ( 1389 ( 1560 GS13 GS 8 12MY1967 40C1967 C.C0258 ) 0. 00472 1 ( 1565 GS13 MI 1 50C1967 20SE1967 0.01014 ) ( 0.04378 1 ( 1544 1546 MU LU 1 1 20C1967 20C1967 0.00238 ) C. 02001 ) ( 1547 ( 1521 MS SH 1 1 20C1967 18SE1967 C. 01597 ) C. 02885 ) ( 1522 ( 1527 BH TR 1 1 18SE1967 20SE1967 0.00182 ) ( 0.06289 1 1523 1529 RA KW 1 X 19SE1967 20SE1967 0.04613 ) 0.07195 ) ( 1526 ( 1530 CO fr 1 1 20SE1967 24SE1967 0.03982 ) C. 01000 ) ( 1531 ( 1551 GH ES 1 1 25SE1967 50C1967 0.00845 ) 0.00799 ) 1545 1552 WL SM 1 1 20C1967 6CC1967 0.03379 > 0.01321 ) ( 1548 ( 1550 CA MR 1 1 30C1967 50C1967 C. 01272 ) C. 08673 ) ( 1553 ( 1351 SG MI 1 2 60C1967 21AP1967 0.00734 ) 0.00621 I 1428 ( 1427 MU LU 2 2 29MY1967 29MY1967 0. 00603 ) C. 01211 I ( 1426 ( 1417 CS HO 2 2 29MY1967 22MY1967 C. 03150 ) 0. 00748 ) ( 1418 ( 1402 SH TR 2 2 22MY1967 6MY196 7 0.03110 ) 0.00541 ) 1350 1354 BH GH 2 2 19AP1967 25AP1967 0.06388 ) CO 1036 ) ( 1401 ( 1403 CO CA 2 2 6MY1967 10MY1967 C.C1764 1 0.01308 1 1 1407 ( 1423 SM WA 2 2 14MY1967 25MY1967 0.01194 ) 0.00428 ) 1349 CI 2 19AP1967 0. 00359 1 ( 14C6 GB 2 13MY1967 C.CC270 ) Nitzsehia filiformis (Wm. Smith) Schutt ., Syn British Mat., Vol. 2, p. 80, Homoeocladia filiformis Wm. Smith, pi. 55. fig. 348. 1856. Nitzsehia filiformis (Wm. Smith) Schutt in: Engler and Prantl, Natiirl. Pf lanzenf am. , Teil 1, Abt. lb, p. 144, figs. 261a-c. 1896. 561 NIFILIFC TCT NO OF STATIONS (46909 MR1947 0.00455 ) Nitzsehia fontieola Grun. Nitzschia fontieola Grunow in: figs. 15-20. 1881. Van Heurck, Syn. Diat. Belgique, pi. 69. 562 NIFONTIC TOT NO OF STATIONS 104 (46910 CH 0C1945 0.00328 ) (46921 CH 23N01545 C. 00259 ) (46915 CH 20FE1946 C. 01707 ) (46914 (46905 CH CH 19AP1946 JA1947 0.00107 ) 0.00245 ) (46924 (465C9 CH CH 10MY1946 MR1947 0.00071 ) 0.00455 ) (46923 (46916 CH CH 22N01946 4MY1947 C. 01748 ) 0. 00102 ) (46906 (46922 CH CH MY1947 21AU1947 0.00199 ) 0.00291 ) (46919 (46758 CH EV 5JN1947 5JN1937 0.01973 ) 0.08915 ) (46907 (46743 CH EV JL1947 20JN1937 0.00148 ) C.C1713 ) (46770 (46747 EV EV 9JL1937 1AU1937 0.01789 ) 0.13862 ) (46764 146763 EV EV 17JL1937 23AU1937 C. 75745 I 1.56250 ) (46757 (46765 EV EV 25JL1937 30AU1937 0.26961 ) C.CC558 ) (46752 (46744 EV EV 15SE1937 60C1937 2.04615 ) 0.03414 ) (46760 (46748 EV EV 22SE1937 13CC1937 0.02462 ) 0.08540 ) (46750 (46767 EV EV 24SE1937 270C1937 C. 08012 I 0.71951 ) (46749 (46751 EV EV 12MR1938 30MR1938 0.03641 ) 0.03350 ) (46768 (46756 EV EV 16MR1938 27AP1538 0.13229 ) 0.00336 ) (46762 (46759 EV EV 18MR1938 19MY1938 1.49978 1 0.0C338 ) (46761 JL_L2J6 EV C 1 27MY1938 8JN1964 0.00545 ) 0.00175 I (46766 ( 1237 EV C 2 14CE1938 .8JN1964 C. 19011 ) 0.00258 ) ( 1439 ( 1240 8 0 6 6 5JN1964 10JN1964 C.002O0 ) 0.00153 ) ( 1241 L.1245 E F 2 2 13JN1964 11JN1964 0.00444 ) 0.00346 ) ( 1242 ( 1251 E C 3 7 13JN1964 16JL1964 C. 00300 ) C. 00290 ) ( 1243 ( 12 56 E E 6 2 13JN1964 14JL1964 C.0C209 ) 0.00366 ) ( 1264 ( 1269 C E 1 3 10AU1964 15AU1964 0.01545 1 0.00274 ) ( 1265 ( 1272 C> C" 2 1 10AU1964 10SE1964 0.00447 ) 0. 00410 ) ( 1268 ( 1285 E F 2 1 1"5AU1964 15SE1964 C.C0547 ) 0.00582 ) ( 1288 J__L29_9_ B _E 3 ? 150C1964 120C1564 0. 00435 ) 0.00943 ) ( 1295 ( 1300 0 E 4 3 150C1964 130C1964 0.00595 1 0.00716 I 1 1298 ( 1301 E E 1 4 5 7 12DC1964 130C1964 9N01964 21AP1967 0.0C539 ) 0.CC442 > ( 1302 ( 1318 E E 5 2 13QC1964 7N01964 0.00405 ) 0.00190 ) ( 1312 ( 1320 0 E 2 4 8N01964 7N01964 C. 00310 ) 0. 00620 ) ( 1315 ( 1346 0 C 0.00455 ) C.CC134 ) ( 1416 ( 1519 E C 5 3 28MY1967 40C1967 0.00219 ) 0.00503 1 ( 1452 ( 1541 E E 2 2 14JL1567 110C1967 0.00213 I 0. 00532 ) ( 1511 ( 1542 E E 2 3 1SE1967 110C1967 C.003O7 ) C. 00509 ) ( 1543 ( 1389 E 5 GS13 100C1967 12MY1967 0.01437 1 0.00258 ) ( 1383 ( 1554 GS GS 7 1 10CY1967 30C1967 C. 00267 ) 0.01423 ) ( 1387 ( 1555 GS11 GS 2 12MY1967 30C1967 C.0C792 ) C.0C353 ) ( 1558 ( 1563 GS 5 GS11 40C1967 5CC1967 0.00396 ) 0.00234 ) ( 1559 ( 1565 GS 7 GS13 40C1967 50C1967 0.00350 ) 0.01521 ) ( 1560 ( 1571 GS 8 GS19 40C1967 60C1967 0.00945 ) C. 00059 ) ( 1572 ( 1547 GS20 MS 1 60C1967 20C1967 0.00180 ) 0.01597 ) ( 1574 ( 1546 GS22 LU 1 60C1967 20C1967 0.00575 ) 0.31511 1 ( 1544 ( 1526 cu CO 1 1 20C1967 20SE1967 C. 02859 I 0.01707 ) ( 1527 I 1545 TR WL 1 1 20SE1967 2CC1967 0.01887 1 1.1892 7 ) ( 1529 ( 1549 KW MS 1 1 20SE1967 40C1967 0.03598 ) 0.02741 ) ( 1530 ( 1551 FR ES 1 1 24SE1967 50C1967 0. 07001 I 0.00799 1 ( 1552 I 1350 SM BH 1 2 60C196 7 19AP1967 0.01321 ) 0.03304 ) ( 1550 ( 1401 MR MO 1 2 50C1967 6CY1567 0.09912 ) 0. 00588 ) ( 1553 ( 1402 SG TR 1 2 60C1967 6MY1967 C. 01469 ) 0.00541 1 ( 1354 < 1404 GH 2 MO 2 25AP1967 10HY1967 0.00345 ) 0.C127C ) ( 1429 ( 1407 WL 2 SM 2 29MY1967 14MY1567 0.05308 ) 0.01194 ) ( 1403 ( 149 Nitzschia fonticola var. pelagica Hust. Nitzschia fonticola var. pelagiea Hustedt ini A. Schmidt, Atlas Diat. pi. 349, figs. 15-16. 1922. 563 NIFCNTVP TtIT NO OF STATIONS t 1350 0 6 . 9N[)l9ft4 n.nn^TH i i 1*544 19AP1967 0.01101 ) ( 1400 2PC1967 0.00738 I I 1550 6MY1967 0.00596 ) ER 1 5CC1967 C. 07434 ) Nitssohia fontiooloides Sov. Nitzschia fontiooloides Sovereign, Trans. American Micr Soc pl. 4, figs. 58-62. 1958. 77(2);130, 564 MFCM'EO TCT NO OF STATIONS C46757 < 1544 EV WU 1 25JL1937 20C1967 0.00481 ) 0.00477 ) ( 1387 ( 1545 GS11 ML 1 12KY1567 2GC1967 C. 00396 ) 0.00676 ) ( 1575 ( 1550 CS28 _HiL_l_ 60C1S67 50C1967 C.CC258 ) 0.03717 ) 6MY1967 0.00596 ) CA 2 10KY1967 C. 05231 ) Nitzschia frustulum (Kiitz.) Grun. Synedra frustulum Kutzing, Bacill., p. 63, pl. 30, fig. 77. Nitzschia frustulum (KUtz.) Grunow in: Cleve and Grunow, K. Vet.-Akad. Handl., Ny Foljd, 17(2): 98. 1880. 1844. Svenska 565 NIFRUST0 TCT NO OF STATIONS ( 1573 GS21 I 1401 M0 2 60C1967 0.00112 ) ( 1574 6MY1967 C.0C588 ) I 60C1967 0.00288 > I 1417 22MY1967 C.CC374 I Nitzschia frustulum var. perminuta Grun. Nitzschia frustulum var. perminuta Grunow in; Van Heurck, Syn. Diat. Belgique, pl. 68, fig. 31. 1881. 566 NIFRUSVP TOT NO OF STATIONS 7 I 1565 GS13 50C1967 0.01014 ) ( 1567 GS15 ( 1523 RA 1 ( 1350 BH 2 19SE1967 19AP1967 0.00923 ) 0,03524 _J_ ( 1553 ( SG 1 6CC1967 0.01469 ) ( 1417 Nitzschia hungarica Grun. Nitzschia hungarica Grunow, Verh. Zool. figs. 31a-b. 1862. -Bot. Ges. Wien, 12:568, pl. 18, 568 NIHUNGAR TCT NO OF STATIONS ( 1264 C< 1 10AUL964 0.00193 » ( 1504 A 3 28AU1967 C. 00247 1 ( 1556 GS 3 30C1967 0.00521 ) ( 1567 1 1401 GS15 HO 2 50C1967 6HY1967 0.0C159 ) 0.01764 1 ( 1417 ( 1400 HO 2 SB 2 22HY1967 6MY1967 0.00374 ) 0.00596 ) ( 1350 ( 1422 BH 2 CA 2 19AP1967 23HY1967 C.0C220 ) 0.00511 ) Nitzschia insecta Hust. Nitzschia insecta Hustedt, Internat. Rev. Hydrobiol., 42:141, fig. 348. 1942. 569 NIINSECO TCT NC CF STATIONS . 1 469.24 CH_ 10HY1946 0.00071 ) ( 1572 60C1967 C. 00090 ) 1 Nitzschia interrupta (Reich.) Hust. De,nticula interrupta Reichelt ex Kuntze, Rev. Gen. Plant., 3:392. 1891. Nitzschia interrupta (Reich.) Hustedt, Arch. Hydrobiol., 18:168. 1927. 570 NIINTERR TCT NO OF STATIONS 1 23AU1937 0.02029 ) 150 Eitzsohia luzonensis Hust. Eitzsohia luzonensis Hustedt, 331-336. 1942. Internat. Rev. Hydrobiol., 42:137, figs. __Z1 tmgZONE TCT NC CF STATIONS 29_ X4fi9JJ_ CH 0C1945 0.00109 ) (46921 (46915 I4.69J.9_ CH _C__ 20FE1946 5JN1947 0.00569 ) 0.00759 ) (46914 (46758 CH EV 19AP1946 5JN1937 0.00107 ) 0. 00357 1 (46916 (46770 CH EV 4MY1947 9JL1937 C.0C068 I C.0C596 ) 146766 FV 14DE1938 0.01584 1 ( 1440 B 6 11JL1964 0.00369 1 ( 1256 E 2 14JL1964 0.00183 1 ( 1257 ( 1268 E 3 E 2 14JL1964 15AU1964 0.00239 ) 0.CC547 ) ( 1258 ( 1275 F 1 C 2 6JL1964 17SE1964 0.00236 ) C. 00645 ) ( 1265 ( 1276 C« 2 0 3 10AU1964 18SE1964 C. 00224 ) C.C1116 ) ( 1284 i 1289 E 6 C 7 17SE1964 140C1964 0.00318 ) 0.00440 ) ( 1285 ( 1302 F 1 E 5 15SE1964 130C1964 0.00582 I 0.00405 ) ( 1445 ( 13C9 e 6 C" 1 140C1964 10N01964 C. 00652 ) 0.00161 ) 50C1967 0.00149 1 60C1967 0.0011.2 ) Eitzsohia macilenta Grev. Eitzsohia maoilenta Greville, Quart. 8-9. 1859. J. Micr. Sci., 7:83, pi. 6, figs. 572 NIMACUO ICT NO CF STATIONS (60973 (46917 CH CH 1876 12JA1S46 0.02362 ) 0.00028 ) 3541 46923 CH CH 1FE1881 22N01946 0.07825 ) 0.00437 ) 46921 46920 CH Ch 23N01945 200E1946 C.C0388 ) C. 00277 ) (46905 (46922 CH CH JA1947 21AU1947 0.00123 ) 0.00097 ) 469C6 46747 CH EV HY1947 1AU1937 C. 000*6 ) C. 00990 ) 46907 46765 CH EV JL1947 30AU1937 C.CC148 ) 0.OC558 ) (46748 ( 1244 EV F 1 130C1937 11JN1964 0.02135 ) 0.00110 ) 46749 1245 EV F 2 12MR1938 11JN1964 0.04855 1 0.00346 ) 46751 1246 EV F 3 30MR153S 11JN1964 C. 01117 ) 0.01195 ) ( 1279 ( 1302 E E 1 5 16SE1964 130C1964 0.00393 I 0.00810 ) 1285 1304 F F 1 1 15SE1964 11CC1964 C. 01747 ) 0.01729 I 1286 1305 F F 2 2 15SE1964 110C1964 C.C1095 ) C. 00863 ) 1 1306 L 1A2.5 F F 3 3 110C1964 6N01964 0.00832 1 0.00504 ) 1323 1337 F C 1 3 6N01964 2MR1967 C. 00697 ) 0.00441 ) 1324 1338 F C 2 3 6NC1964 28MR1967 C.0C466 ) C.0C132 ) ( 1340 1 1346 C C 7 7 28MR1967 21AP1967 0.00073 ) 0. 00134 ) 1344 1347 C E 3 2 25AP1967 23AP1967 C. 00165 ) 0.00325 ) 1345 1348 c E 5 5 25AP1967 23AP1967 C.CC390 ) C.0C274 ) ( 1374 ( 1437 E E 2 3 7MY1967 15JN1967 0.0C299 ) 0.00269 1 141C 1438 A E 6 5 24MY1967 14JN1967 0.00564 ) 0.00363 1 1415 1504 E A 3 3 28HY1967 28AU1967 C. 00225 I C. 00247 ) ( 1377 ( 1384 GS GS 1 8 9MY1967 10MY1967 0.0C396 ) 0.00185 I 1382 1385 GS GS 6 9 10MY1967 10MY1967 0.01110 ) 0.00471 ) 1383 1387 GS 7 GS11 10MY1967 12MY1967 12MY1967 13MY1967 C. 00267 ) C.C1980 ) ( 1388 ( L391__ GS12 GS15 12MY1967 12MY1967 0.08446 1 0.02873 ) 1389 1392 GS13 GS16 12MY1967 12MY1967 0.12634 ) C. 04007 1 1390 1393 GS14 GS17 0.01174 ! C.C2192 ) ( 1394 ( 1397 GS18 GS71 13MY1967 13MY1967 0.02236 1 0.00131 ) 1395 1398 GS19 GS22 13MY1967 14MY1967 0.00352 ) 0.01214 ) 1396 1558 GS20 GS 5 13MY1967 4CC1967 C. 00222 ) C.0C793 1 ( 1559 C 1564 GS 7 GS12 40C1967 50C1967 0.00350 ) 0.00165 ) 1561 1565 GS 9 GS13 4CC1967 50C1967 0.00587 1 C.0O5O7 ) 1563 1566 GS11 CS14 50C1967 50C1967 C.0C935 ) C.CC917 ) ( 1567 1 1370 GS15 G_S_19 50C1967 50C1967 0.02699 1 0.10908 1 1568 1571 GS16 GS19 50C1967 60C1967 0.01299 1 G. 00059 ) 1569 1573 GS17 GS21 50C1967 6CC1967 C. 03122 ) C.CC112 ) ( 1574 ( 1527 GS22 TR 1 60C1967 20SE1967 0.00288 ) 0.OC629 ) 1575 1528 GS28 SB 1 60C1967 20SE1967 0. 00258 ) 0.01444 ) 1526 15 29 KW 1 1 20SE1967 20SE1967 C. 01707 ) C.C4797 1 ( 1551 ( 1553 ES 5_ 1 1 50C1967 60C1967 0.00799 ) 0.01469 ) 1552 1426 SM MS 1 2 6CC1967 29MY1967 0.01321 ) C. 01050 1 1550 1404 PR KC 1 2 50C1967 10MY1967 C. 01239 ) 0.02541 ) I 1407 SM 2 14MY1967 0.00597 ) 1406 GB 2 13MY1967 0.00270 1 Eitzsohia -galea (Kutz.) Wm. Smith Synedva galea Kutzing, Bacill., p. Eitzsohia galea (Kutz.) Wm. Smith., 63, pi. 3, fig. 27, pi. 4, fig. 2. 1844. Syn. British Diat., Vol. 2, p. 89. 1856. 573 NIPALEA TCT NC CF STATIONS 46910 A6_9.1__ 46923 46919 CH __B_ CH CH CC1945 _20FE1_?46_ 2 2ND 1946 5JN1947 0.00218 ) 0.00569 ) 0.00437 ) 0.00152 ) 46521 46914 CK CH 23N01945 19AP1946 C.0O065 ) 0.00107 1 (46917 (46924 CH CH 465C9 469C7 CH CH MR1947 ■11.1947 0.00455 ) 0.00197 ) (46916 (46922 CH CH 12JA1946 10HY1946 4MY1547 21AU1947 C. 00028 ) 0.00071 ) C.CC034 ) 0.03926 ) 46758 _46764_ EV _E1L 5JM937 17JU937 0.00357 ) 0.90250 1 46743 46757 EV EV 20JN1937 25JU937 0.00428 I 0.04333 ) (46770 (46747 EV EV 5JL1937 1AU1937 C.0C596 ) C.C6436 ) 46763 C467A4_ EV JLSL 23AU1537 60C1937 0.08117 ) 0.02439 ) 46752 46767 EV EV 15SE1937 270C1937 C. 08707 ) C. 05416 ) (46750 (46768 EV EV 24SE1937 16HR1938 C.C4242 ) C.C147C ) 46762 1?54 EV D 2 18MR1938 15JU964 0.08822 ) 0.00383 ) 46761 1256 EV E 2 27HY1938 14J11964 0.00273 ) 0.00183 I ( 1252 ( 1258 C 1 F 1 6JL1964 15SE1964 0.00382 ) 0.00582 ) 1272 1302 10SE1964 130C1964 C. 00821 0.00405 ( 1279 ( 1452 E 1 E 2 16JL1564 6JL1964 16SE1964 14JL1567 C. 00558 ) C.CC472 ) C.0C785 ) C.0C426 ) 1454 U5AL E 5 _EL_2_ 15JL1967 110C1967 0.OC2O0 ) 0.00532 ) 1532 1542 A 3 E 3 18SE1967 110C1967 0.00657 ) 0.01017 ) ( 1538 1 1555 E 5 GS 2 23SE1967 30C1967 C.0C552 ) C.CC353 I 40C1967 0.00350 ) 50C1967 0. 00507 ) 18SE1967 C.00471 ) ( 1521 SH 1 20C1967 C. 03098 1 18SE1567 C. 25964 I 1522 1527 BH 1 TR 1 18SE1967 20SE1967 0.00547 I 0.10063 I 1523 1528 RA 1 SB 1 19SE1967 20SE1967 0.00923 0.04332 ( 1526 ( 1529 MO 1 KH 1 20SE1967 2CSE1967 C. 02845 ) C. 01199 ) 1530 1551 FR 1 ES 1 24SE1967 50C1967 0.06001 ) 0.01598 ) 1545 1552 UL 1 SH 1 20C1967 6CC1967 0.25677 ) 0.00660 ) ( 1549 ( 1550 f*Q 1 PR 1 40C196 7 50C1967 C.C1370 ) 0.35931 ) 1553 SG 1 1350 BH 2 60C1967 19AP1967 0.00734 ) 0.30616 I 1426 14C1 MS 2 MO 2 29MY1967 6MY1967 0.03150 ) 0.01764 ) < 1417 ( 1402 1-0 2 TR 2 22MY1S67 6MY1967 C.0C374 ) C. 01624 I 1400 1423 SB 2 HA 2 6MY1967 0.01191 ) 25MY1967 0.00426 ) 21AP1967 0.01718 ) 151 Nitzsohia palea var. sumatrana Hust. Nitzsohia palea var. sumatrana Hustedt, Arch. Hydrobiol. Suppl. Bd., 15:483, pl. 41, fig. 10. 1938. 575 NIPALEVS TOT NO OF STATIONS 1 J32_3_ 6N01564 0.0C139 1 Nitzsohia paleaeea Grun. Nitzsohia paleaeea Grunow in: Van Heurck, Syn. Diat. Belgique, pl. 68, figs. 9-10. 1881. 574 MPA-FAC TCT NC Of STATIONS X J544_ 2CC1S67 0.02855 Nitzsohia parvula Wm. Smith Nitzsohia parvula Wm. Smith, Syn. British Diat., Vol. 1, p. 41, pl. 13, fig. 106. 1853. 576 NIPARVUL TCT NO OF STATIONS 1 2 9MY1967 Nitzsohia recta Hantz. Nitzsohia recta Hantzsch ex Rabenhorst, Alg. Sachsens resp. Mitteleuropas Exsicc, No. 1283. 1860. 577 N1RECTA TCT NO OF STATIONS 19 (60973 _ XH CH . _J_H CH CH 1876 19FE1881 20FE1946 22N01946 MR1947 0.04724 ) 0.02264 ) 0.02845 ) 0.00219 ) 0.00455 I ( 3540 CH 11. Y1879 0.01398 ) ( 3541 CH 1FE1861 C. 04691 ) ( 3507 J 46915 (46521 (46914 (46920 (46916 CH CH 23N01945 19AP1946 0.00453 ) 0.C032O ) (46917 (46924 CH CH 12JA1946 10MY1946 0.0C139 ) 0.00282 ) (46923 (46909 CH CH 20DE1946 4MY1547 0.00123 ) 0.00543 ) (46905 (46919 CH CH JA1947 5JN1947 0.00245 ) C.0C455 ) (46907 X46I7JL CH EV JL1947 - UJN1 937... 0.01381 ) 0.00238 1 (46922 (46743 CH EV 21AU1947 20JN1937 0.01502 ) 0.00856 ] (46758 (46770 EV EV 5JN1937 9JL1937 C. 00357 ) C.CC596 ) (46764 14475.CL EV EV EV c 6 17JL1937 24SE1537 0.01612 ) 0.OC471 ) (46757 (46767 EV EV 8 C 3 7 25JL1937 270C1937 18MY1964 16MY1964 0.02407 1 0.00387 ) C.C5000 ) 0.13699 ) (46747 (46768 ( 1224 ( 1227 EV EV B C 4 2 1AU1937 16. R1938 C. 01485 ) C.C1470 1 (46751 ( 1725 30KR1938 15MY1964 0.CU17 ) 0.05880 ) 1 1223 ( 1226 18HY1964 13HY1964 C.C5411 ) C. 03509 ) ( 1228 LJ.23JU 0 E 2 3 14MY1964 16NY1964 0.27248 ) 0.62616 ) ( 1229 ( 1232 0 E 5 5 14. Y1964 16PY1964 0.35525 ) C. 40697 ) ( 1230 ( 1233 E B 2 3 16HY1964 5JN2964 C. 21925 ) 0.04763 ) ( 1235 I 1237_ C (_■_ □ F 7 2_ 6 6 16JN1964 8JN1964 10JN1964 13JN1964 0.00282 1 C.C3609 1 0.10738 ) 0.14616 ) ( 1439 ( 1238 ( 1241 ( 1244 B 0 E F 6 3 2 1 5JN1964 11JM964 13JN1964 11JN1964 0.02997 1 C. 03000 ) C. 07393 ) C. 14144 ) ( 1236 ( 1239 ( 1242 ( 1245 C« 0 E F 1 4 8JN1564 11JN1964 C.C1050 ) C. 01509 ) ( 1240 ( 124. 3 2 13JN1964 1UN1964 C. 06444 ) C.C9335 ) ( 1246 ( 1255 F D 3 5 11JN1964 15JL1964 0.05379 1 0.00257 ) ( 1249 ( 1256 C E 3 2 8JL1964 14JL1964 0.00272 ) 0.01282 ) ( 1252 ( 1257 C E 1 3 16JL1S64 14JL1964 C.0C279 I C.C1196 ) ( 1258 (. 12.6.8 F _E_ 1 ? 6JL1964 15AU1964 0.01180 ) 0.0C547 ) ( 1259 ( 127C F F 2 1 6JL1964 1CAU1964 C. 00930 ) 0.00272 I ( 1260 ( 1271 F C 3 7 6JL1964 22SE1964 C. 01146 1 C.CC653 ) ( 1274 I 1285 D F 1 1 17SE1964 15SE1964 0.00469 ) 0.03494 ) ( 1279 ( 1288 E B 1 3 16SE1964 150C1964 0.00393 ) 0.00218 1 ( 1284 ( 1289 E C 6 7 17SE1964 140C1964 0.00318 ) 0.01319 I ( 1290 ( -1295 _. C" D 1 4 160C1964 15CC1964 0.00379 ) 0.00595 ) ( 1292 ( 1297 0 0 1 6 150C1964 140C1964 0.01118 ) 0.00762 ) ( 1294 ( 1298 0 E 3 1 150C1964 120C1964 0.00330 ) 0. 00808 ) ( 1299 ( 1303 E E 2 6 120C1964 130C1964 0.01571 ) 0.00560 ) ( 13C0 ( 1304 E F 3 1 130C1964 U0C1964 C. 01074 ) C. 01976 ) < 1302 ( 1305 E F 5 2 130C1964 110C196' C.CC810 ) C. 02415 ) ( 1306 1 1.16 F n 3 6 110C1964 9Nf]1964 C. 04158 1 0.00378 ) ( 1307 ( 1317 B E 6 1 NO 1964 6N01564 0.00361 I C. 00191 1 ( 1310 ( 1318 E 2 2 10NC1964 7N01964 C. 00227 ) O.CC190 ) ( 1319 ( 1322 E E 3 6 7N01964 7N01964 0.00785 1 0.01333 I ( 1320 ( 1323 E F 4 1 7N01964 6N01964 0.00827 ) 0.00139 ) ( 1321 ( 1324 E F 5 2 7N01964 6NC1964 C. 00958 ) C.0C233 ) ( 1325 ( 1338 F C 3 3 6N01964 28MR1967 19AP1967 25AP1967 0.00252 ) 0.18512 1 < 1336 ( 1339 C C 3 5 27JA1967 28MR1967 0.00963 ) 0.30866 ) ( 1337 ( 1340 C C 3 7 2MR1967 28HR1967 C. 04997 ) C. 07417 ) ( 1341 A C 3 3 0.04448 ) 0.01489 ) ( 1342 ( 1345 A C 4 5 19AP1967 25AP1967 0.16422 ) 1.09155 1 < 1343 ( 1346 A C 6 7 19AP1967 21AP1967 C. 02709 ) C. 06409 ) I 1347 E 2 23AP1967 4MY1967 0.13495 1 0.01864 ) ( 1348 ( 1370 E A 5 6 23AP1967 3MY1967 0.17272 ) 0.10358 ) ( 1368 ( 1372 A C 3 5 4MY1967 5MY1967 C. 14138 1 0. 16314 ) < 1373 ( 1376 C E 7 5 5MY1967 6MY1967 0.00856 ) 0.08995 I ( 1374 ( 1410 E A 2 6 7MY1967 24MY1967 0. 01793 1 0.03383 ) ( 1375 ( 1411 E C 3 3 7HY1967 31KY1967 0.02166 ) C.C1641 ) ( 1412 ( 1432 C A 5 4 31MY1967 13JN1967 0.02525 ) 0.01533 ) ( 1413 ( 1433 C C 7 3 25HY1967 17JN1967 0.00316 I 0.00646 1 ( 1415 ( 1434 E C 3 5 28MY1967 17JN1967 0.00450 1 C. 00299 ) ( 1435 ( 1449 C C 7 3 13JN1967 16JL1967 0.00631 I 0.00764 1 ( 1436 ( 1532 E A 2 3 15JN1967 18SE1967 0.00362 1 0.00329 I I 1438 ( 1538 E E 5 5 14JN1967 23SE1967 C. 00363 ) C.0C552 ) ( 1377 GS GS 1 5 9MY1967 10MY1967 0.00396 ) 0.00954 ) ( 1378 ( 1382 GS GS 2 6 9MY1967 10MY1967 C. 00841 ) 0.01110 ) ( 1380 ( 1383 GS 4 CS 7 GS10 GS13 9HY1967 10MY196 7 C. 01177 ) CO 1604 ) ( 1384 GS 8 GS11 10KY1967 12HY1967 0.01664 ) 0.11090 I ( 1385 ( 1388 GS 9 GS12 10MY1967 12HY1967 C. 00942 ) 0.04827 ) 1 1386 ( 1389 12KY1967 12MY1967 C. 00575 ) C. 04383 1 ( 1390 ( 1393 GS14 GS17 12MY1967 13MY1967 0.22901 ) 0.06027 ) ( 1391 ( 1394 GS15 GS18 12MY1967 13MY1967 0.20591 1 0.66226 ) ( 1392 ( 1395 GS16 C-S19 12HY1967 13KY1967 C.C3390 1 0.06576 ) ( 1396 ( 1557 GS20 GS 4 13NY1967 30C1967 0.00296 ) 0.00374 I ( 1397 ( 1560 GS21 GS 8 13MY1967 40C1967 0.01112 1 0.00472 1 ( 1398 ( 1563 GS22 GS11 14HY1967 50C1967 C.0C304 1 0. 00468 ) ( 1567 ( 1570 GS15 GS18 50C1967 50C1967 0.00159 1 0.02975 ) ( 1568 ( 1571 GS16 GS19 50C1967 60C1967 C. 00144 1 0.00117 ) ( 1569 ( 1573 GS17 GS21 5GC1967 60C1967 C. 04757 1 C.0C224 ) 152 ( 1575 ( 1520 GS28 HO 1 6CC1967 18SE1967 0.00129 1 0.02829 ) 1544 1521 MU SH 1 1 20C1967 18SE1967 0.00477 1 0.05193 1 ( 1546 ( 1522 LU BH 1 1 20C1967 18SE1967 0.01501 ) C. 01641 1 1 1526 -L1545__ MO WL 1 1 20SE1967 20C1967 0.01707 1 0.04054 ) 1527 1552 TR SM 1 1 20SE1S67 60C1967 0.02516 ) 0.00660 ) ( 1528 ( 1550 SB CR 1 1 2CSE1967 50C1967 C. 01444 I C. 16107 ) ( 1553 ( 1351 SG MI 1 2 60C1967 21AP1967 0.01469 ) 0.01241 ) 1428 1427 MU LU 2 2 29MY1967 29MY1967 0.00301 1 0.08475 ) ( 1426 ( 1417 PS HO 2 ? 29MY1967 22MY1967 C. 05249 ) C.C2991 ) 1 1418 ( 1399 SH PW 2 2 22MY1967 5MY1967 0.04666 ) 0.02040 ) 1350 1401 BH MO 2 2 19AP1967 6MY1967 0.02643 ) 0.04116 ) ( 1425 ( 1402 RA TR 2 2 25MY1967 6MY1967 C. 02652 ) C. 08122 ) ( 1400 -LJL429 SB WL 2 2 6MY1967 29MY1967 0.01787 ) 0.02123 ) 1352 1403 KM CA 2 2 21AP1967 10MY1967 C. 02577 ) 0.06539 1 ( 13 54 ( 1404 GH MO 2 2 25AP1967 10MY1967 CO 1381 ) C.C2541 ) ( 1405 ( 1419 ES BU 2 2 12MY1967 23MY1967 0.07095 ) 0.05492 ) 1407 1420 SM IH 2 2 14NY1967 23MY1967 0.04180 ) 0.01511 ) ( 1349 ( 1421 CI CH 2 2 19AP1967 23HW1967 C. 02155 ) C. 01735 ) ( 1422 GA 2 23MY1967 0.05109 ) 1423 WA 2 25MY1967 0.09421 I 1 1424 KN 2 25MY1967 C. 01332 ) Nitzsohia romance Grun. Nitzsohia vomana Grunow in: Van Heurck, Syn. Diat. figs. 12-13. 1881. Belgique, pi. 69. 578 NIRCMANA TOT NO OF STATIONS 48 (46917 (46973 CH CH 12JA1946 22N01946 0.00083 1 0.00437 ) (46915 (46916 CH CH 20FE1946 4MY1947 0.00569 ) 0.00034 ) (46924 (46919 CH CH 10MY1946 5JN1947 0.00141 ) C. 00303 ) (46747 ( 1240 fcv 0 B C 6 6 1 1AU1937 10JN1964 0.00246 ) 0.00307 1 (46767 ( 1243 EV E 6 270C1937 13JN1964 0.00337 ) 0. 00418 ) ( 1230 ( 1244 E 2 F 1 16MY1964 11JM964 0. 00296 I ( 1440 ( 1264 UJL1964 10AU1964 C.0C369 ) 0.02510 ) ( 1258 ( 1265 f 1 C 2 6JL1964 10AU1964 0. 00236 ) 0.00224 ) ( 1260 ( 1266 F 3 D 3 6JL1964 18AU1964 C.CC191 ) ( 1275 ( 1304 D F 2 1 17SE1964 110C1964 0.00645 ) 0.00247 ) ( 1279 ( 1307 E 1 6 6 16SE1964 N01964 C. 00785 1 0. 00361 ) ( 1285 ( 1308 F 1 C 7 15SE1964 6N01964 C.C1165 ) 0.00304 1 ( 1320 (- 1541 t E 4 5 7N01964 100C1967 0.00207 1 0.00718 ) ( 1343 ( 1387 A 6 GS11 19AP1967 12MY1967 C. 00069 ) 0.00396 I ( 1536 ( 1398 E 2 GS22 24SE1967 14MY1967 C.0C273 ) 0.00304 ) ( 1555 I 152? US BH 2 1 30C1967 18SE1967 0.00353 ) 0.00182 ) ( 1559 ( 1526 GS 7 MO 1 40C1967 20SE1967 C. 00350 I 0.01707 1 ( 1564 ( 1527 GS12 TR 1 50C1967 20SE1967 C.0C165 ) C. 00629 ) ( 1529 LJL42Ji KW BH SB 1 2 2 20SE1967 29MY1967 0.01199 ) 0.00301 ) ( 1531 ( 1351 GH 1 MI 2 25SE1967 21AP1967 0.00845 ) 0.00310 I ( 1550 ( 1417 MR 1 ho 2 50C1967 22MY1967 C. 02478 I 0.00748 ) X X4Q0_ 19AP1967 6MY1967 0.01762 ) 0.00596 ) ( 1401 ( 1352 MO 2 KM 2 6MY1967 21AP1967 0.01764 ) 0.00859 ) I 1402 ( 1407 TR 2 SM 2 6MY1967 14MY1567 C.0C541 ) C. 01194 ) Nitzsohia sigmoidea (Nitz.) Wm. Smith Baoillaria sigmoidea Nitzsch, Neue Schrift. Naturforsch. Ges. Halle, 3(1):104. 1817. 579 NISIGMCI TOT NO OF STATIONS 25 1337 2MR1967 1554 1569 1526 ( 1530 GS 1 GS17 1550 1417 MO 1 _EB_JL_ 30C1967 50C1967 20SE1967 24SE1967 0.00356 ) 0.00149 I MR 1 HO 2 1401 1349 MO 2 -CI 2 50C1967 22MY1967 0.01707 ) 0.01000 ) 0.02478 ) 0.00748 ) 6MY1967 19AP1967 0.00588 I 0.00359 I 1565 1575 GS13 GS28 50C1967 60C1967 1527 1531 TR 1 GH 1 1553 1418 20SE1967 25SE1967 C. 01014 ) C. 00516 ) 0.01258 ) 0.00845 ) SG 1 SH 2 60C1967 22KY1967 0.00734 ) 0.01555 ) 10MY1967 0.02541 I 1568 1547 GS16 JS1 1529 1552 50C1967 20C1967 KW 1 SM 1 20SE1967 60C1967 1428 1350 1407 MU 2 BH 2 29MY1967 19AP1967 C. 00144 ) 0.00798 ) C. 01199 ) 0.00660 ) C. 00301 ) C. 02863 I 14MY1967 0.01194 ) Nitzsohia sinuata var. tabellaria (Grun.) Grun. Dentioula tabellaria Grunow, Verh. Zool.-Bot. Ges. Wien, 12:548. 1862, Nitzsohia sinuata var. tabellaria (Grun.) Grunow in: Van Heurck, Syn. Diat. Belgique, p. 176, pi. 60, figs. 12-13. 1885. 580 MSINUVT TOT NO OF STATIONS 24SE1967 0.01000 ) 20C1967 C. 00676 I Nitzsohia spiouloides Hust. Nitzsohia spiouloides Hustedt, Instit. Pares. Nat. Congo Beige, Expl. Pare Nat. Albert, Mission Damas (1935-1936), Fasc. 8 5-6. 1949. 151, pi. 13, figs. 582 N1SPICUL TCT NO OF STAT11.NS I _L2iUL I 1300 JL._1.544... E 3 -HILL 130C1964 20C1967 0.00358 ) 0.00477 ) ( 1536 ( 1522 E 2 BH 1 6JL1964 C.C0930 1 24SE1967 18SE1967 0.00273 ) 0.00365 I ( 1380 ( C-S 4 Nitzsohia subaciculavis Hust. Nitzsohia subacioularis Hustedt in; A. Schmidt,, Atlas Diat., pi. 348, fig. 76. 1922. 153 AB3 Nisar ir-ii in no of stations l 1 1268 F ? 15AU1964 0.00274 ) ( Nitzsahia sublinearis Hust. Nitzsahia sublinearis Hustedt in: Pascher, Sussw.-Fl. Mitteleuropas, Heft 10, Aufl. 2, p. 411, fig. 786. 1930. 581 NISLINfe'A TOT NO OF STATIONS 9_ -L-L522 BH_1 18SE1967 0.03100 ) ( 1523 RA 1 19SE1967 u. 00923 I 1 1526 P0 1 20SE1967 0 03414 1 < 1528 SB 1 20SE1967 0.08663 ) ( 1545 wTT 20C1967 0.33110 ) { 1550 M!~l 50C1967 C.03717 I L-1417 H£L_2 22PY1S67 0.01122 ) ( 1350 BH 2 19AP1967 0.01762 I ( 1420 1H 2 23HY1967 C. 01511 ) Nitzsahia thermalis (Ehr.) Auersw. Pinnularia thermalis Ehrenberg, Abh. Akad. Wiss. Berlin, 1841:21. 1843. Nitzsahia thermalis (Ehr.) Auerswald ex Rabenhorst, Alg. Sachsens resp. Mitteleuropas Exsicc., No. 1064. 1860. 564 NITHFRHA TOT NO OF STATIONS 2 I 1264 C 1 10AU1964 0.00193 ) ( 1532 A 3 18SE1967 0.00329 ) ( Nitzsahia tropica Hust. Nitzsahia tropica Hustedt, Instit. Pares Nat. Congo Beige, Expl. Pare Nat. Albert, Mission Damas (1935-1936), Fasc. 8, p. 147, pi. 11, figs. 34-48. 1949. 585 NITROP1C ICT NO OF STATIONS 2 146767 EV 18MR1938 0.02206 ) ( 1258 F 1 6JL1964 0.0C236 ) ( Nitzsahia tryblionella Hantz. Nitzsahia tryblionella Hantzsch ex Rabenhorst, Alg. Sachsens resp. Mit- teleuropas Exsicc., No. 984. 1860. S«6 NITRYBLI TCT NC OF STATIONS 1 I 1SS7 SM 1 60C1967 0.00660 ) ( Nitzsahia tryblionella var. debilis (Arnott) A. Mayer Nitzsahia debilis Arnott ex Grunow in: Cleve and Grunow, K. Svenska Vet. -Akad. Handl., Ny Foljd, 17(2): 68. 1880. Nitzsahia tryblionella var. debilis (Arnott) A. Mayer, Ber. Naturw. Ver. Regensburg, 14:295, pi. 16, fig. 16. 1913. 587 MTRYBVO TOT NO OF STATIONS 1 JA.6764 E_L 17J11937 C.0C8C6 ) {_ Nitzsahia tryblionella var. levidensis (Wm. Smith) Grun. Tryblionella levidensis Wm. Smith, Syn. British Diat., Vol. 2, p. 89. 1856. Nitzsahia tryblionella var. levidensis (Wm. Smith) Grunow in: Cleve and Grunow, K. Svenska Vet. -Akad. Handl., Ny Foljd, 17(2):70. 1880. 588 NITRYBVL TOT NO OF STATIONS 4 ( 1556 GS 3 3CC1967 0.00521 I ( 1572 GS20 60C1967 C.C0C90 1 ( 1545 hi 1 20C1967 C.0C676 ) 1 1401 fO 2 6KY1967 0.01764 ) ( 154 Species inoevtae sedis Nitzsckia sp. #1. (aff. N. lanoettula 0. Mull.) 589 NISPECCA TCT NC CF STATIONS 120 (46910 (46915 CH CH OC1945 20FE1946 0.00546 1 0.01707 ) 46921 46914 CF CH 23NC1945 19AP1946 C. 00194 ) 0.00641 ) (46917 (46924 CH CH 12JA1S46 10HY1946 C.CC028 ) 0.00141 ) (46923 (46909 CH CH 22..01 .46 MR1947 0.00874 ) 0.00911 ) (4692C 46916 CH CH 20CE1946 4MY1547 0.00031 ) 0.00170 1 (469C5 (469C6 CH CH JA1S47 MY1547 C. 00735 ) C. 00929 ) (46919 J46758 CH EV EV EV 5JN1947 5JN1937 0.09863 ) 0.04636 ) (469C7 46771 CH EV EV EV JL1947 11JN1937 1AU1937 22SE1937 0.00099 ) 0.00238 ) C. 00495 ) C. 00492 ) (46922 (46764 146763 (46744 CH EV EV EV 21AU1947 17JL1937 23AU193 7 60C1937 C.0C291 ) C. 04835 ) (46757 (46752 25JL1937 15SE1937 0.C1926 ) 0.06530 1 46747 46760 C. 02029 ) C.0C975 ) (46767 ( 1225 EV C 6 270C1937 15HY1964 0.00387 ) 0.0C392 ) 46768 1228 EV 0 2 16HR1938 14MY1564 0.C1470 1 0.00389 ) (46762 ( 1229 EV C E 0 5 5 4 18PR1938 14HY1964 16MY1964 11JN1964 C.C4411 ) C.0C423 ) ( 1230 _ ( __.J23.3_. E ... _____ 2 3 16MY1964 5JN2964 0.00593 ) 0.00238 ) 1231 1238 E 0 3 16..Y1964 11JN1964 0.03180 ) 0.C0400 I ( 1232 ( 1239 C.C9218 ) C.CC116 ) ( 1240 ( 1743 D E 6 6 10JN1964 13JN1964 0.00153 ) 0.00418 ) 1241 1244 E F 2 1 13JN1964 11JN1964 0.00739 ) C. 00548 ) ( 1242 ( 1245 E F 3 ? 13JN1964 11JM964 C.0C749 ) C.0C692 ) ( 1246 < _1_2 56 _ F 6 F _ .£'. E F 3 2 2 2 2 1 UJN1964 14JL1964 6JL1964 10AU1564 15AU1964 15SE1964 0.01195 ) 0.01282 ) 1252 1257 C E 1 16JL1964 14JL1964 0.00837 ) 0.00479 ) ( 1254 ( 1258 D F 2 1 15JL1964 6J11964 C.CC383 ) C. 01888 ) ( 1259 ..!.. 1.265 0.00310 ) 0.00224 1 1260 1266 1269 1288 F 0 3 3 6JL1964 18AU1964 0.00573 ) 0.00351 ) ( 1264 ( 1267 C* 0 1 6 10AU1564 18AU1964 C.0C579 ) C.0C216 1 ( 1268 ( 1285 0.02188 1 0.02912 ) E B 3 3 15AU1964 150C1964 C. 01096 1 0.00218 I ( 1274 ( 1445 D B 1 6 17SE1964 140C1964 C.0C469 1 C.CC652 ) ( 1290 L 1322 . C E C A E A 1 6 5 4 2 6 160C1964 7N01964 28HR1967 19AP1967 23AP1967 3. Y1967 0.00379 ! 0.00333 I 0.04053 ) 0.00180 ) 1300 1337 E C 3 130C1964 2MR1967 C. 01790 1 0.00588 ) ( 1304 ( 1338 F C 1 3 110C1S64 28HR1967 C. 00247 1 C. 0066 1 ) { 1339 (1342 _ 1340 1343 c A 7 6 28MR1967 19AP1967 0.00291 ) 0.00139 ) ( 1341 ( 1345 A C 3 5 19AP1967 25AP1967 C.0C217 ) C. 02924 ) ( 1347 ( 1370 0.00813 1 0.00230 ) 1348 1372 E C 5 5 23AP1967 5MY1967 0.C2467 ) 0.00355 ) ( 1368 ( 1373 A C 2 7 4KY1967 5HY1967 C. 00314 ) C.CC570 ) ( 1374 1-1411 _ E C C C 2 3 3 7 7CY1967 3JNY1967 0.0C598 1 0.0C410 ) 1375 1412 E C 3 5 7KY1967 31MY1967 0.01684 ) 0.00842 ) ( 1376 1 1416 E E 5 5 6CY1967 28CY1967 C.0C562 1 C.0C437 ) 1 1433 1 1451 17JN1967 16JL1967 24SE1967 10MY1967 0.00646 1 0.0C197 1 1436 1453 E E 2 3 15JM967 15JL1967 0.00362 ) C. 00506 ) ( 1449 ( 1512 C E 3 3 16JL1967 1SE1967 C. 01529 ) C.0C393 ) ( 1536 ( 1383 E GS 2 7 C.0C273 ) 0.00802 ) 1542 1384 E GS 3 8 11CC1967 10HY1967 0.00509 ) C. 00555 ) ( 1381 ( 1385 GS GS 5 9 10MY1967 10MY1967 C.CC477 ) C.0C235 ) ( 1386 (_.157_0 _ GS10 GS18 12MY1967 50C1967 0.00287 ) C.0C992 ) 1387 1574 GS11 GS22 12MY1967 60C1967 C. 00396 ) 0.00288 I C. 01258 ) 0.00621 ) ( 1394 I 1546 ( 1550 ( 1417 GS18 LU 1 KR 1 HC 2 13MY1967 20C1967 50C1967 22HY1967 C.0C172 ) C.CC500 ) 1 1526 1 1426.. _ MO -.___. 1 2 20SE196.7 29MY1967 0.02845 ) 0.01050 ) 1527 1351 TR Ml 1 2 20SE1967 21AP1967 C. 01239 ) C.C1869 ) ( 1425 1 1400 RA SB 2 2 25MY1967 6MY1967 0.00884 ) 0.01191 1 1399 1352 PW KW 2 2 5MY1967 21AP1967 0.006S0 ) 0.008S9 ) ( 1401 ( 1353 t>0 FR 2 2 6MY1967 23AP1967 C.CC588 ) C.C1055 ) ( 1403 1-1422 CA C.A 2 7 10MY1967 23MY1967 0.01308 ) 0.01022 ) 1407 1423 SM WA 2 2 14MY1967 25MY1967 0.00597 ) 0.02141 ) ( 1421 [ 1424 CH KN 2 2 23MY1967 25MY1967 C. 01735 ) C.C1332 ) Nitzschta sp. #2. 59(1 NISPFCflR TCT NO OF STATIt-N. J58 (60973 CH 1876 0.07085 1 ( 3540 CH 11KY1879 0.06523 ) ( 3541 CH 1FE1881 C. 17607 1 I 3507 (46917 CH CH 19FE1881 12JA1946 0.03396 ) 0.30635 ) (46921 (46915 CH CH 23N01945 20FE1946 0.11576 ) 0.09105 ) (469C8 (46914 CH CH 0E1945 19AP1S46 C. 05035 ) C. 52107 ) (46924 (46905 CH CH 10MY1946 JA1947 0.09171 ) 0.01716 ) (46923 (46509 CH CH 22N01946 MR1947 0.15736 ) 0.12295 ) (46920 (46512 CH CH 200E1946 AP1947 C. 02003 1 C.C5749 ) (46916 146907 CH CH 4MY1947 JL1947 0.01391 ) 0.11785 1 (46506 (46522 CH CH MY1947 21AU1947 0.41016 ) 0.07560 ) (46919 (46758 CH EV 5JN1947 5JN1937 C. 12291 ) 1.29805 ) (46771 146757 EV EV EV EV 11JN1937 25JL1937 15SE1937 12MR1538 0.66568 1 0.00481 ) 0.02177 1 0.06069 ) (46743 (46747 (46748 (46768 EV EV 20JN1937 1AU1937 0.37681 ) 0.09902 ) (46764 (46763 EV EV 17JL1937 23AU1937 C. 12087 ) C. 08117 ) (46752 (46749 EV EV 130C1937 16MR1938 0. 32024 ) C.C7350 1 (46767 (46762 EV EV 270C1937 18CR193e C. 03095 1 (46751 (46759 EV EV 30MR1938 19MY1938 0.04466 ) 0.05402 ) (46772 (46761 EV EV 18AP1938 27MY1938 0.01419 ) 0.05178 1 (46756 (46766 EV EV 27AP1538 140E1938 C. 11753 ) C. 03169 ) ( 1223 ( 1226 B C 3 7 18MY1964 16MY1964 0.00781 1 0.17504 ) ( 1224 ( 1227 B C 4 2 18MY1964 13HY1964 C. 02745 ) 0.01535 ) ( 1225 ( 1228 C 0 E B 6 2 3 3 15MY1964 14KY1964 16HY1964 18JN1964 C.C5880 ) ( 1229 I 1232 D E 5 5 14KY1964 16MY1964 0.21569 ) 0.30436 1 ( 1230 ( 1233 E B 2 3 16HY1964 5JN2964 0.15706 ) 0.03334 ) ( 1231 ( 1234 0. 54169 ) C.C0281 ) ( 1235 ( 1237 L C 7 2 16JN1964 8JN1964 0.00282 ) 0.04640 ) 1 1439 ( 1238 B 0 6 3 5JN1964 11JM964 0.05594 ) C. 16600 I ( 1236 ( 1239 D 1 4 8JN1964 11JM964 C. 05601 ) 0.00696 1 ( 1240 ( 1243 0 e 6 6 10JN1964 13JN1964 0.53688 ) 0.22551 1 ( 1241 ( 1244 E F 2 1 13JN1964 11JN1964 0.15081 ) 0.08443 ) ( 1242 ( 1245 E F 3 2 13JN1964 C.2C981 ) ( 1246 [ 1440 F B 3 6 11JN1964 11JL1964 0.05379 ) 0.00737 ) < 1247 ( 1441 B B 3 6 14JL1964 24JL1964 C.0C427 1 ( 1248 B C C" E 3 6 2 2 24JL1964 10JL1964 16JL1964 14JL1964 C.CC394 ) C.CC411 1 0.01598 ) C. 03297 ) ( 1251 ( 1254 C D 7 2 16JL1964 15JL1964 0.00579 ) 0.C3448 ) 1 1252 ( 1255 C D 1 5 16JL1964 15JL1964 0.00279 ) 0.00513 ) ( 1253 ( 1256 ( 1257 1__J.26JL _ F 3 3 14JL1964 6JL1964 0.11485 ) 0.02865 ) < 1258 ( 1261 F B 1 3 6JL1964 2AU1964 0.08259 ) 0.00196 ) ( 1259 ( 1264 F r.« 2 1 6JL1964 10AU1964 C.C5578 ) C. 00193 I ( 1268 (' 1.278 t 0 2 6 15AU1964 18SE1964 0.0C274 ) 0.00384 I ( 1269 ( 1279 E E 3 1 15AU1964 16SE1964 C. 01644 ) C. 01571 ) ( 1272 ( 1281 c E 1 3 1CSE1964 16SE1964 C.C1231 ) ( 1284 ( 1.288 E B 6 3 17SE1964 150C1964 0.0C635 ) 0. 01088 ) ( 1285 I 1445 F B 1 6 15SE1964 140C1964 0.14559 ) 0.00978 1 ( 1287 ( 1289 F C 3 7 15SE1964 140C1964 C.CC500 ) C.CC440 1 ( 1291 L 1298 _____ (.• E F 2 1 160C1964 12QC1964 0.00245 1 0.00808 ) ( 1293 ( 1299 D E 2 2 150C1964 120C1964 0.00472 ) 0.00943 ) ( 1297 ( 1300 0 E 6 3. 140C1964 130C1964 0.00762 1 C.C3222 ) ( 1301 1 1304 4 1 130C1964 110C1964 0.00442 I 0.01976 ) ( 1302 ( 1305 E F 5 2 130C1964 110C1964 0. 02834 ) C.C0690 ) ( 1303 ( 1306 E F 6 3 130C1964 110C1964 C.C2239 ) ( 1307 1 1314 B 6 4 N01964 9N01964 0.01082 ) 0.00287 ) ( 1308 ( 1315 C D 7 5 6N01964 9N01964 0.00912 ) C. 00455 1 ( 1310 ( 1316 C" D 2 '.0N01964 C.0C227 ) ( 131-7 ( 1320 E F 1 4 6N01964 7N01964 0.00383 ) 0.01241 1 ( 1318 ( 1321 E E 2 5 7N01964 7N01964 C.C0190 ) 0.00319 1 ( 1319 ( 1322 E E 3 6 7NC1964 C.0C524 ) ( 1323 1 1336 H r. 1 3 6N01964 27JA1967 0.01254 ) 0.00770 ) ( 1324 ( 1337 F C 2 6N01964 2MR1967 C. 00466 1 0.12199 ) 1 1325 ( 1338 F C 3 3 6N01564 C.0C252 ) 1 1339 ( 134? C A 5 4 28MR1967 19AP1967 0.60173 ) 0.42228 ) ( 1340 ( 1343 C A 7 6 28KR1967 19AP1967 0.15271 ) 0.24316 I ( 1341 ( 1344 A C 3 3 19AP1967 25AP1967 C. 16597 ) ( 1345 ( 1348 C F 5 5 25AP1967 23AP1967 C. 39569 ) 1.34339 1 ( 1346 ( 1368 C A 7 3 21AP1967 4MY1967 0.31245 ) 0.73516 ) ( 1347 ( 1369 E A 2 4 23AP1967 4MY1967 C. 41623 ) ( 1370 ( 1373 A f. 6 7 3MY1967 5MY1967 0.19105 1 0.30806 1 ( 1371 ( 1374 C E 3 2 4HY1967 7 .Y1967 0.59098 ) 0.52301 ) ( 1372 ( 1375 C 5 3 5HY1967 7MY1967 1.48957 ) 0.52639 ) 155 ( 1376 ( 1410 ( 1413 I 1416 ( 1433 ( 1436 ( 1446 ■J 1451 ( 1504 (_L5_11_ ( 1534 E 5 A 6 C 7 _.E_.5_ C 3 E 2 A 3 C 7 A 3 E 2„ 6HY1967 24MY1967 0.51158 I 0.33266 ) 25MY1967 28MY1967 0.13267 I 0.15308 ) ( 1408 ( 1411 A 3 C 3 23HY196 / 3IMY1967 17JN1967 15JN1967 ( 1414 ( 1431 E 2 A 3 28MY1967 12JM967 C. 20570 I 0.31592 1 0.41338 ) 0.10494 1 11JL1967 16J11967 ( 1434 ( 1437 C 5 E 3 17JN1967 15JN1967 0.05709 I C.C2317 ) 0.00245 ) 0.00197 ) ( 1449 ( 1452 C 3 E 2 16JL1967 14JL1967 0.14356 I C. 07536 1 28AU1967 1SE1967 0.00247 1 0.00307 ) ( 1505 ( 1512 A 4 E 3 19SE1967 0.00620 ) 28AU1967 1SE1967 0.06496 ) 0.00852 1 0.01031 ) 0.00393 ) ( 14C9 ( 1412 ( 1415 ( 1432 A 4 C 5 ( 1435 ( 1438 E 3 A 4 23HY1967 31MY1967 ( 1450 ( 1453 C 7 E 5 28MY1967 13JN1967 0.04166 ) C. 38303 1 ( 1508 ( 1532 C 5 E 3 13JN1967 14JN1967 C. 15740 ) C. 22479 ) C 3 A 3 16JL1967 15JL1967 C. 11050 ) C. 12346 1 2SE1967 18SE1967 C. 00571 ) O.C7330 I C.C0400 ) C. 00329 ) ( 1541 E 2 I10CI967 0.00532 1 ( 1377 _£S_1_ 9MY1967 0.18999 1 ( 1378 C. 11354 ) ( 1379 1 1382 GS 3 GS 6 9MY1967 10MY1967 0.06499 ) 0.11380 1 ( 1380 ( 1383 es 4 GS 7 9MY1967 10MY1967 0.10762 ) 0.08287 I ( 1381 ( 1384 GS 5 GS 8 10MY1967 10HY1967 C. 05009 ) C. 15713 I ( 1385 < 1386 ( 1391 I 1394 GS 9 GS12 10MY1967 12MY1967 0.13892 ) 0.25339 ) ( 1386 I 1389 GS10 GS13 12HY1967 12MY1967 0.11204 I 0. 10056 1 ( 1387 ( 1390 GS11 GS14 12MY1967 12MY 196.7 0.27725 1 C. 24662 ) ( 1407 I 1419 GS15 GS18 SM 2 BU 2 12MY1967 13HY1967 0.20112 ) 1.02350 ) I 1392 ( 1395 GS16 GS19 12MY1967 13MY1967 0.12636 ) 0.C8690 1 ( 1393 ( 1396 GS17 GS20 13MY1967 13MY1967 C. 34791 ) C. 01036 1 14MY1967 23MY1967 0.08957 ) C. 43940 I ( 1349 ( 142C CI 2 IH 2 19AP1967 23HY1967 0.74718 ) 0.18127 ) ( 1406 ( 1421 GB 2 CH 2 13MY1967 23MY1967 ( 1397 ( 1557 GS21 GS 4 13MY1967 30C1967 0.03859 ) 0.01121 ) ( 1398 ( 1560 GS22 GS 8 14MY1S67 40X1967 0.21253 1 0.01417 ) ( 1554 ( 1562 GS 1 GS10 30C1967 50C1967 C. 02135 ) C. 00247 ) ( 1563 ( 1567 GS11 GS15 50C1967 50C1967 0.00701 1 0.0C953 ) ( 1564 ( 1568 GS12 GS16 50C1967 50C1967 0.00165 ) 0. 00289 ) I 1565 ( 1569 GS13 GS17 50C1967 50C1967 C. 00507 i C. 01932 ) ( 1570 ( 1573 GS18 GS21 50C1967 60C196 7 0.01983 1 0.00224 ) ( 1571 ( 1574 GS19 GS22 60C1967 60C1967 0.00176 ) 0.00288 ) ( 1572 ( 1575 GS20 GS28 60C1567 60C1967 C. 00180 ) C.0C645 ) ( 1544 ( 1521 MU SH 1 1 20C1S67 18SE1967 0.00238 ) 0.04616 ) ( 1546 ( 1522 LU BH 1 1 20C1967 18SE1967 0.03501 ) 0.02188 ) ( 1520 ( 1526 HO MO 1 1 18SE1967 20SE1967 C. 01886 ) C. 06827 ) ( 1527 ( 1530 TR FR 1 1 20SE1967 24SE1967 0.01258 ) 0.01000 ) ( 1528 ( 1531 SB GH 1 1 20SE1967 25SE1967 0.02888 ) 0.03381 I ( 1529 ( 1545 KM WL 1 1 20SE1967 20C1967 C. 15589 ) C. 02703 ) ( 1549 ( 1550 HO MR 1 1 40C1967 50C1967 0.02741 ) 0.06195 I ( 1551 ( 1553 ES SG 1 1 50C1967 60C1967 0.02396 ) 0.02203 ) ( 1552 ( 1428 SM MU 1 2 60C1567 29MY1967 C. 06603 ) C. 07533 1 ( 1426 ( 1417 US HO 2 2 29MY1967 22MY1967 0.97638 I 0.65799 ) ( 1351 I 1418 MI SH 2 2 21AP1967 22MY1967 C. 26067 I 0.07776 I ( 1427 I 13 50 LU BH 2 2 29MY1967 19AP1967 0. 82324 1 C. 59911 ) ( 1425 ( 1402 RA TR 2 2 25MY1967 6MY1967 0.22102 1 0.86636 ) ( 1399 ( 1400 Ph SB 2 2 5MY1967 6MY1967 0.32644 ) 0.30975 ) ( 1401 ( 13 52 MO 2 2 6MY1567 21AP1967 C. 43509 ) C. 36076 ) ( 1353 ( 1403 FR CA 2 2- 23AP1967 10MY1967 0.04219 I 0.23539 I ( 1354 ( 1404 GH MC 2 2 25AP1967 10MY1967 0.08976 1 0.05081 1 ( 1429 ( 1405 Ui. ES 2 2 29MY1967 12MY1967 C. 33974 ) C. 04515 1 C. 04044 ) C. 32963 ) 0.46629 ) Nitzschia sp. #5. 591 NISPECOE TCT NO OF SIATICNS ( 3540 {_4.6_9.07 CH CH 11MY1879 JL1947 0.00466 ) 0.00099 ) 46SC9 46747 CH EV MR1947 1AU1937 0.00455 ) 0.00248 1 (46906 (46752 Ch EV MY1S47 15SE1937 C.CC465 1 C. 02177 ) ( 1253 ( 1257 C" E 2 3 16JL1964 14JL1964 0.00456 1 0.01914 ) 1254 1258 C F 2 1 15JL1964 6JL1964 0.00958 ) 0.00236 ) ( 1256 ( 1260 E F 2 3 14JL1964 6JL1964 C.0C916 ) C.0C764 1 ( 1279 1 1374 E E 1 2 16SE1964 7MY1967 0.00393 I 0.02690 ) 1287 1375 F E 3 3 15SE1964 7MY1967 0.00500 I 0.01203 ) ( 1445 ( 1376 B E 6 5 140C1964 6MY1967 C.0C652 ) C.0C843 ) ( 1412 JLJL433_ C c 5 3 31MY1967 17JN1967 0.01263 ) 0.00646 ) 1414 1436 E E 2 2 28MY1967 15JN1967 0.00336 1 0.00362 ) ( 1432 ( 1446 A A 4 3 13JN1967 UJL1967 C. 01022 1 C. 00489 ) I 1447 1 1453 A F 4 3 11JL1967 15JL1967 0. 00234 ) 0.00506 1 1450 1511 C E 5 2 16JL1967 ISE1967 C.0019O I 0.00307 1 ( 1452 ( 1512 E E 2 3 14JL1967 1SE1967 C.0C639 ) C. 01571 ) ( 1379 ( 1383 GS GS 3 7 9MY1967 10MY1967 0.00619 ) 0.03743 ) 1380 1384 GS GS 4 8 9MY1967 10MY1967 0.00336 ) C. 05176 ) I 1381 ( 1385 GS GS 5 9 10MY1967 10MY1967 C.0C954 ) C. 00235 ) ( 1386 ( 1395 GS10 GS19 12MY1967 13MY1967 0.00862 I 0.00587 1 1392 1397 GS16 GS21 12MY1967 13MY1967 0.01233 I 0.00131 ) ( 1394 ( 1398 GS18 C-S22 13MY1967 14MY1967 C. 05333 ) C.0C3O4 ) ( 1555 ( 1521 GS SH 2 1 30C1967 18SE1967 0.00353 ) 0.00577 ) 1560 1552 GS SM 8 1 40C1967 60C1967 0.00472 ) 0.01981 ) ( 1544 ( 1550 MU MR 1 1 20C1967 50C1967 C.CC238 ) C. 02478 1 ( 1428 ( 1427 MU LU 2 2 29MY1967 29MY1967 0.00301 ) 0.01211 ) 1426 1417 MS HO 2 2 29MY1967 22MY1967 0.03150 ) 0.01122 ) ( 1351 ( 1350 MI BH 2 2 21AP1967 19AP1967 C.0C621 ) C.0C441 ) ( 1399 ( 1354 PW GH 2 2 5MY1967 25AP1967 0.0C68C ) 0.01726 ) 1352 1429 WL 2 2 21AP1967 29MY1967 0.02577 ) 0.03185 ) ( 1353 ( 1403 FR CA 2 2 23AP1967 10MY1967 C. 01055 1 C. 15692 ) 1 1404 MO 2 10MY1967 0.C127C ) N-itzsohia sp. #6. 592 NISPECOF TOT NO OF STATIONS 5JM937 0.00357 1 1274 R 4 1SMY1964 0.00196 1 1731 F - 16MY1964 0.00245 1 1439 B 6 5JK1964 C.CC200 I ( 1243 ( 1260 E F 6 3 13JM964 6JL1964 0.00209 ) 0.0C191 ) 1257 1268 E E 3 2 14JL1964 15AU1964 0.00239 1 C. 00274 ) 1258 1269 F E 1 3 6JL1964 15AU1964 C.0C236 ) 0.00274 1 I 1337 ( 1340 C C 3 7 2MR1 .67 28MR1967 0.00441 ) 0.0C654 I 1338 1341 C A 3 3 28MR1967 19AP1967 0.10975 ) 0.01627 ) 1339 1342 C A 5 4 28MR1967 19AP1967 C.C2806 ) C. 21475 ) ( 1343 I 1346 A C 6 7 19AP1967 21AP1967 0.00417 ) 0.OC267 ) 1344 1347 C E 3 2 25AP1967 23AP1967 0.00496 ) 0.03577 I 1345 1348 C E 5 5 25AP1967 23AP1967 C. 30018 1 C. 21110 ) I 1368 L 13-7-2- A C E .. . . £ E GS 3 5 3 3 3 6 4MY1967 5MY1967 7MY1967 17JN1967 1SE1967 10MY1967 0.05655 ) 0.04611 I 1369 1373 A C 4 7 4MY1967 5MY1967 C. 00745 1 0.00285 ) 1370 1374 A E 6 2 3MY1967 7MY1967 C. 01381 ) C. 02092 ) ( 1375 i .143.3. ._ 0.01202 ) 0.00646 ) 1376 1434 E C 5 c 6MY1967 17JN1967 0.01405 I 0.00598 ) C. 00309 j 0.00267 ) 1412 1511 C E 5 2 31MY1--7 1SE1967 C.C1684 1 C.CC307 ) 1 1512 ( 1382 0.0C393 ) 0.02220 ) 1379 1383 GS GS 3 7 9MY1967 10MY1967 1380 1384 . GS GS 4 8 9MY1967 10MY1967 C.CC168 ) C.CC370 ) ( 1386 ( 1557 GS10 GS 4 12MY1967 30C1967 0.00575 ) 0.00374 1 0.01444 ) 0.01239 1 C.C0210 ) 0.01176 I 1387 1562 1545 1428 1427 1402 GS11 GS10 KL 1 MU 2 LU 2 TR 2 12MY1967 50C1967 0.00396 ) C. 00247 ) 1394 1566 1551 1426 1417 1400 GS18 GS14 ES 1 MS 2 Vo 2 SB 2 13MY1967 5CC1967 50C1967 29MY1967 22MY1967 6NY1967 C.0C344 ) C.0C183 ) ( 152 8 ( 1550 SB MR MI MO 1 .1. 2 2 20SE1967 50C1967 21AP1967 6MY1967 2GC1567 29MY1967 0.01351 1 C.C0301 1 C.CC799 ) C. 01050 ) { 1351 ( 1401 29MY1967 6MY1967 C. 02421 1 C. 00541 ) C.1C842 ) C. 01191 ) ( 1354 ( 1422 GH GA 2 2 25AP1967 23MY1967 0.02244 1 0.00511 ) 1403 1423 CA WA 2 2 10MY1967 25MY1967 C. 01308 ) 0.02141 ) 1349 CI 2 19AP1967 C. 01796 1 156 Nitzsohia sp. #7. 591 NISPECCG TCT NO CF STATIONS (46758 ( 1274 1 1572 .. ev D 1 -JZS2S SH 1 GH 1 _5JN1937 17SE1964 6CCJ96 7 _ 16SE1967 25SE1967 0,00357 ) 0.0 0469 ) 0_.OC09C > 0.02885 ) 0.00845 ) (46747 ( 1279 ( 1544 ( 1526 ( 1545 EV E MU i 1 1AU1937 16SE1964 20C1967 20SE1967 20C1967 0.00248 ) 0.00393 ) C. 02859 ) 0.00569 I 6.919 39 ) 1268 1556 1546 1530 1548 E 2 GS 3 LU 1 FR 1 CA 1 15AU1964 3001967 20C1967 24SE1967 3CC1567 C.C0274 ) C.0C521 ) C. 28510 ) ( 1521 ( 1531 MO 1 1 C.C6001 ) C.C1272 ) ( 1549 ( 1417 MO 1 hO 2 4CC1967 22MY1967 0.01370 1 0.00748 ) ( 1552 ( 1354 SM GH 1 2 60C1967 25AP1967 0.00660 ) 0.00173 ) 1550 1429 CB 1 kL 2 50C1967 29MY1967 C.C7434 ) C.C1062 ) Nitzsohia sp. #8. 594 MSP6CCH TCT NO OF STATKNS (46752 EV ( L2S.5. ._ F 1 ( 14C3 CA 2 15SE1937 .15SE1964 10MY19 67 0.02177 ) 0. ,02912 I C. 01308 I ( 1270 (_ 1554 ( F 1 . GS__1._ 10AU1964 30C1967 0.00272 ) 0.00356 ) ( 1275 ( J1546 D 2 _UJ_1__ 17SE1964 __20C1967 C.CC645 ) C. 02001 ) Nitzsohia sp. #9. 595 NISPECCI TCT NT CF STATIONS 3 ( 1340 C 7 28MR196 7 6.00073 Nitzsah-ia sp. #10. 596 N1SPECCJ TCT NO OF STATIONS 1 ( 1250 C 6 10JL1964 0.CC411 ) ( Nitzsohia sp. #11. 597 NISPECOK TCT NC CF STATIONS 2 ( 1272 0* 1 10SE1964 0.00410 ) I 1550 MR 1 Nitzsohia sp. #12. 596 NISPECOL TOT NO OF STATIONS 4 ( 1550 MR 1 50C1967 0.03717 ) ( 1426 MS 2 I 1404 Hfi_2 10MV1967 0.0127C ) ( 29MY1S67 C. 01050 ) ( 1350 19AP1967 C. 00661 ) Nitzsah-ia sp. #14. 599 NISPECON TCT NO OF STATIONS 1 ( 1511 6 2 1SE1967 0.00307 ) ( Nitzsohia sp. #15. 600 M SPECCC TOT NO OF STATIONS 4 -L 1544 MU 1 20C1967 0. 01668 I ( 1546 LU 1 I 1428 MU 2 29MY1967 0.01205 ) ( 2CC1967 C. 03(101 1 ( 1550 50C1967 C. 02476 ) Nitzsohia sp. #16. 601 NISPECOP TOT NC CF STATIONS 4 ( 1544 MU 1 20C1967 0.00715 ) I 1546 LU 1 1 1545 WL_1 20C1967 0.03379 ) ( 20SE1967 C. 01199 ) Nitzsohia sp. #17. 602 NrSPFf.no TOT NO OF STATIONS 1 _LJA44_ LU 1 20C1567 0.02501 ) t 157 Nitzsohi-a sp. #18. 603 MSPECOR TCT NO OF STATIONS ,< 1522, BH 1 18SE1967 C. 10029 ) ( 1550 50C1967 0.01239 ) Genus Opephora Petit Petit, Miss. Sci. Cap Horn, 1882-1883, Bot., Vol. 5, p. 130. 1888. Members of the genus Opephora find their primary habitat in periphyton communities. Occasional specimens are taken in plankton collections from Lake Michigan, especially in nearshore areas. Opephora ansata Hohn and Hellerm. Opephora ansata Hohn and Hellerman, 321, pi. 1, fig. 13, 1963. Trans. American Micr. Soc., 82(3): 606 OPSPECOB T07 NC OF STATI CNS 37 (60973 CH 1876 0.04724 ) ( 3541 CH 1FE1881 0. 00978 ) (46921 CH 23NC1S45 C.CCC65 ) (46915 (46922 CH CH 20FE1946 21AU1947 0.00569 ) 0.00097 I (46924 (46758 CH EV 10MY1946 5JN1937 0.OO071 ) 0.02853 1 (46916 (46764 CH EV 4MY1947 17JL1937 C. 00034 ) C.CC806 ) (46757 (46752 EV EV 25JL1937 15SE1937 0.01926 ) 0.17414 ) (46747 (46760 EV EV 1AU1937 22SE1937 0.01733 ) 0.00985 ) (46763 (46744 EV EV 23AU1937 60C1937 C. 34497 ) C.0C975 ) (46748 (46768 EV EV 130C1937 16MR1938 0.06405 ) 0.05880 I (46767 (46762 EV EV 27CC1937 18MR1938 0.02708 1 0.17644 ) (46749 (46759 EV EV 12MR1938 19HV1938 C. 02427 ) C.C1013 ) ( 1264 C 1 E 6 10AU1964 130C1964 0.00193 ) 0.00560 ) ( 1279 ( 1340 E C 1 7 16SE1964 28MR1967 0.00393 ) C. 00218 ) ( 1285 I 1538 F 1 E 5 15SE1964 23SE1967 C.C1165 1 C.08286 ) ( 1541 E 2 GS16 110C1967 12MY1S67 0.01597 1 0.00616 ) ( 1543 ( 1394 E 5 GSia 10CC1967 13MY1967 0.01437 ) 0.00344 ) ( 1388 ( 1398 CS12 0S22 12MY1967 14MY1967 0.00603 ) C.CC607 ) ( 1567 1 1575 GS15 GS28 50C1967 60C1967 0.00318 ) 0.0C129 ) I 1571 ( GS19 60C1967 C. 00059 ) ( 1574 GS22 60C1967 3.62423 1 Opephora martyi Herib. Opephora martyi HSribaud, Diat. Foss. Auvergne, Vol. 1, p fig. 20. 1902. 43, pi. 8, 604 CPHARTYI TOT NC OF STATIONS 47 _(_ 354JL ( 1?97 ( 1532 1 1388 I 1396 _X 1558 ( 1569 (_-L5X4_ I 1526 1 1550 ( 1427 _X_135A_ ( 1349 CH E 1 JUL_ A 3 GS12 GS20 GS 5 GS17 GS22 MS SH MO 1 MR 1 LU 2 GH 2 11MY1679 0.00466 ) 16SE1964 14DC1964 0.08639 ) 0.00190 ) 18SE1967 12MY1967 0.00329 ) 0.01207 ) 13MY1967 40C1967 0.00074 1 0.00396 ) 5CC1967 6QC1967 0.00149 I 0.01438 ) 20C1967 18SE1967 0.01597 I 0.02308 I 20SE1967 5CC1967 0.00569 1 0.28497 ) 29MY1967 25AP1967 0.04843 ) 0.00518 1 19AP1967 0.00359 ) 1284 1320 E 6 E 4 1533 1390 A 4 GS14 1554 1565 GS 1 GS13 1571 1575 GS19 GS28 1546 1522 LU 1 BH 1 1531 1553 GH 1 SG 1 1417 HO 2 1404 MO 2 17SE1964 7N01964 C. 00318 I C. 00207 ) ( 1285 ( 1372 F 1 C 5 19SE1967 12HY1967 0.00464 ) 0.00587 ) ( 1377 ( 1392 GS 1 GS16 30C1967 50C1967 0. 00356 ) C. 07099 ) ( 1557 (1567 GS 4 GS15 60C1967 60C1967 0.00176 ) 0.00129 ) ( 1572 ( 1544 GS20 MU 1 20C1967 18SE1967 25SE1967 60C1967 .01501 ) .00182 ) ( 1520 ( 1525 HO 1 PW 1 01691 I 0.00734 ) ( 1545 ( 1426 WL 1 US 2 22MY1967 10MY1967 0.00374 1 C.05081 1 ( 1350 (1407 BH 2 SM 2 13MY1967 0.00539 ) 15SE1964 5HY1967 9MY1967 12MY1967 30C1967 50C1967 60C1967 20C1967 18SE1967 20SE1967 20CI967 29MY1967 19AP1967 14MY1967 0.00582 ) C.0C3SS ) C.0C396 ) C.0C925 ) C. 00747 ) C.0C635 ) C. 00270 ) C.0C238 I C.C2357 ) 0.01393 ) C.0C676 ) 0.C4199 ) C. 01762 ) C. 01194 ) Opephora sp. #1. Species incertae sedis 605 OPSPECOA TCT NC OF STATIONS (46923 ( 1350 CH BH 2 22N01546 19AP1967 0.00219 I 0.00441 ) ( 1285 ( Opephora sp. #2. _A07 QES£EMC_,TCT NO QF STATIONS, ( 1?6? GS13 ( 1546 LU 1 1 1550 MR 1 5CC1967 0.00507 1 ( 1571 20C1967 50C1967 0.00500 I 0.28497 ) ( 1522 ( 1553 BH 1 SG 1 18SE1967 60C1967 0.00182 ) 0.00734 ) 6CC1967 C. 00112 ) ( 1545 ( 1350 WL 1 BH 2 20C1967 19AP1967 C.0C676 ) C.C1982 ) 158 Genus Oestrupia Heid. Heiden ex Hustedt, Ber. Deutsch. Bot. Ges., 53(1):16. 1935. Although the growth habit of the freshwater members of the genus Oestrupia is poorly known, the limited information available indicates that they are most often found in benthic communities. The entities known from Lake Michigan are rare in plankton collections and those noted usually come from nearshore localities. Oestrupia zachariasi (Reich.) comb. nov. Navicula (Caloneis) zachariasi Reichelt, Forshungsber. Biol. Sta. Plon, 14:199. 1903. 608 OE2ACKAR TCT NO Of STATIONS 3 LJL5AS S£13 5CC1967 C.01014 ) ( 1521 SH 1 18SE1967 0.00577 ) ( 1545 M 1 20C1967 C. 04054 I Oestrupia zachariasi var. undulata (Schulz) comb. nov. Caloneis baltioa var. undulata Schulz, Bot. Arch., 13:203, fig. 76. 1926. 609 OEZACHVU TOT. NO OF STATIONS 7 JL4ASL15 CD 20FE1946 0.00569 ) 1 1279 6 1 16SE1964 0.00393 ) < 1398 GS22 14MV1967 C.0C304 I ( 1565 GS13 50C1967 0.01521 ) I 1574 GS22 60C1967 0.00288 I ( 1546 LU 1 20C1967 C.CIOOO ) L152J I_B_1 20SE1967 0.00629 ) ( Genus Pinnularia Ehr. nom. cons. Ehrenberg, Ber. Akad. Wiss. Berlin, 1843:45. 1843. Most species of the genus Pinnularia find their primary habitat in ben- thic communities. The rare representatives of the genus that are taken in plankton collections from Lake Michigan are undoubtedly derived from such communities within the lake or from sources outside the lake proper. Pinnularia abaujensis (Pant.) Ross Navicula abaujensis Pantocsek, Beitr. Foss. Bacill. Ungarns, Theil 2, p., 41, pi. 3, fig. 54. 1889. Pinnularia abaujensis (Pant.) Ross, Natl. Mus. Canada Bull., 97(2) :199, pi. 10, fig. 1„ 1947. Coll: 1800. Pinnularia abaujensis var. linearis (Rust.) Patr. Pinnularia gibba var. linearis Hustedt in: Pascher, Sussw.-Fl. Mittel- europas, Heft 10, Aufl. 2, p. 327, fig. 604. 1930. Coll: 1800. Pinnularia acrosphaeria Wm. Smith Pinnularia acrosphaeria Wm. Smith, Syn. British Diat., Vol. 1, p. 58, pi. 19, fig. 183. 1853. Coll: 1818. Pinnularia biceps Greg. Pinnularia biceps Gregory, Quart. J. Micr. Sci., 4:8, pi. 1, fig. 28. 1856. 159 .6I£. PIBlCEPS-IU_iiiLJ2£_-SXATJLCN3 1 I _ 1350 BH ? 19AP1967 0.CC22C ) I Pinnularia biceps f o . petersenii Ross Pinnularia interrupta fo. minor Peterson, Bot. Iceland, Vol. 2, Pt. 2, p. 405, fig. 25. 1928. Pinnularia biceps fo. petersenii Ross, Natl. Mus. Canada Bull., 97(2): 201, pi. 9, fig. 11. 1947. Ml PIBICEFP TOT NO OF STATIONS 1 I 1404 HO 2 10MY1967 0.0127C ) ( Pinnularia borealis Ehr. Pinnularia borealis Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:420, pi. 1(2), fig. 6. 1843. 612 PIBCREAL TOT NO OF STATIONS 1 1 1395 GS19 13MY1967 0.00117 I ( Pinnularia brebissonii (Kutz.) Rabh. Navicula brebissonii Klltzing, Bacill., p. 93, pi. 3, fig. 49. 1844. Pinnularia brebissionii (Kiitz.) Rabenhorst, Fl. Europaea Alg., Sect. 1, p. 222. 1864. 613 PIBRFBIS TOT NO OF STATIONS 5 146920 CH 20DE1946 0.00031 I (46916 CH 4HY1947 0.00034 ) (46764 EV 17JL1937 C.OC806 1 (46759 EV 19MY1938 0.00338 ) ( 1423 HA 2 25MY1967 0.00428 I ( Pinnularia burkii Patr. Pinnularia burkii Patrick, Farlowia, 2(2):189, pi. 3, fig. 1. 1945. 614 PIBURKII TCT NO CF STATIONS 1 ( 1354 GH~1 25AP1967 0.00173 ) T Pinnularia globiceps var. krockii (Grun.) Cleve Navicula krockii Grunow in: Mojsisovics and Neumayer, Beitr. Palaontol. tfsterreich-Ungarns, Bd. 2, Heft 4, p. 155, pi. 30, fig. 40. 1882. Pinnularia globiceps var. krockii (Grun.) Cleve, K. Svenska Vet. -Akad. Handl., Ny FBljd, 27(3): 77. 1895. 615 PIGLCBVK TCT NO OF STATIONS 1 ( 1380 GSH 12MY1567 6.0025F1 T Pinnularia interrupta var. crassior (Grun.) Cleve Navicula globiceps var. crassior Grunow in: Cleve and Grunow, K. Svenska Vet. -Akad. Handl., Ny Foljd, 17(2):27, pi. 1, fig. 13. 1880. Pinnularia interrupta var. crassior (Grun.) Cleve, K. Svenska Vet. -Akad. Handl., Ny F8ljd, 27(3): 76. 1895. Tl6 PiTntTvC TOT NO D? STATIONS 3 TT381 GSll 12*71967 0~.00603~~) I 1389 GS13 12MY1967 0.00258 ) ( 1417 HO 2 22HY1S67 CT0C374 > 160 Pinnularia legvmen (Ehr.) Ehr. Naviaula legvmen Ehrenberg, Ber. Akad. Wiss. Berlin, 1841:141. 1841. Pinnularia legvmen (Ehr.) Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:301, pi. 4(1), fig. 7. 1843. 617 PII.EGLME TCT NO OF STATIONS 1 t 1404 iSl 10MY1967 0.0127C ) F Pinnularia leptosoma (Grun.) Cleve Naviaula leptosoma Grunow in; Van Heurck, Syn. Diat. Belgique, pi. 12, fig. 29. 1880. Pinnularia leptosoma (Grun.) Cleve, K. Svenska Vet. -Akad. Handl., Ny Foljd, 27(3) :74. 1895. 618 PI1.EPT0S TCT NC OF STATIONS 1 I 1550 WR 1 50C1967 0.02478 I T Pinnularia major (Kutz.) Rabh. Frustulia maior Klltzing, Linnaea, 8::547, pi. 14, fig. 25. 1833. Naviaula major (Kutz.) Kutzing, Bacill., p. 97, pi. 4, figs. 19-20. 1844. Pinnularia major (Kutz.) Rabenhorst, Siissw.-Diat. , p. 42, pi. 6, fig. 5. 1853. Coll: 1552. Pinnularia stomatophora (Grun.) Cleve Naviaula stomatophora Grunow in: A. Schmidt, Atlas Diat., pi. 44, figs. 27-29. 1876. Pinnularia stomatophora (Grun.) Cleve, Acta Soc. Fauna El. Fennica, 8(2):27. 1891. 620 PISPECOC TOT NO OF STATIONS 1 I 3541 CH 1FE1881 0.00978 ) T Pinnularia tibetana Hust. Pinnularia tibetana Hustedt in: Hedin, South. Tibet, Vol. 6, part 3 (Bot.) p. 129, pi. 9, figs. 3-5. 1922. 621 PISPECOD TOT NO OF STATIONS 1 ( 46764 EV 17JL1S37 C. 01612 ) T Pinnularia undulata Greg. Pinnularia undulata Gregory, Quart. J. Micr. Sci., 2:97, pi. 4, fig. 10. 1854. Coll: 862. Pinnularia viridis (Nitz.) Ehr. Baoillaria viridis Nitzsch, Neue Schrift. Naturf. Ges. Halle, 3(1) :97, pi. 6, figs. 1-3. 1817. Pinnularia viridis (Nitz.) Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841: 305, pi. 1(1), fig. 7. 1843. 161 615 PIVIRIDI TCT NO OF STATIONS Genus Rhizosotenia Ehr. Ehrenberg, Abh. Akad. Wiss. Berlin, 1841:134. 1843. All known members of the genus Rhizosotenia are euplanktonlc . Most of its members are marine, however the following species are found only in fresh water and are widely reported from the Great Lakes . Rhizosotenia eviensis H. L. Smith Rhizosotenia eviensis H. L. Smith, The Lens, 1:44. 1872. Cells bacilliform with a single conspicuous spine at each end. Valves much reduced, appearing as a cap at the end of the cells. Cells elongated in the pervalvar axis and laterally compressed. Specimens from Lake Michigan 35-150ia long, 10-25u broad in greatest diameter, only 2-4y in least diameter. Because of the construction of the frustule, specimens are almost always observed in girdle view. Intercalary bands numerous, constructed in the form of a split-ring with cuneate ends so that the ends of the "ring" overlap one side of its own opposite end and one side of the next successive intercalary band. The line of imbrication of the intercalary bands is in the median of the long axis of the cell and is quite conspicuous. The frustule is very lightly silicified and is usually destroyed by standard diatom cleaning pro- cedures. In living cells the chromatophores occur near the center of the cell. The end spines are excentric and usually occur on opposite sides of the ends of the cells . This species is common in plankton collections from Lake Michigan, usually reaching its maximum abundance in the late spring or early fall. 622 RHERIENS TCT NO OF STATIONS 252 (60973 (46908 CH CH 1876 DE1945 0.87388 ) 0.03021 I 3541 46917 CH CH 1FE1881 12JA1946 0.00978 ) 0.04186 ) (46921 (46915 CH CH 23N01945 20FE1946 C.CC388 ) 0.17641 ) (46914 (46920 CH CH 15AP1546 20CE1946 0.0C320 ) 0.00031 ) 46924 465C5 CH CH 10MY1946 JA1947 0.22927 ) 0.01471 ) (46923 (46909 CH CH 22N01546 MR1547 C.C1530 1 C. 10018 1 (46916 (46907 CH CH 4MY1547 JL1947 0.35286 ) 0.04586 ) 46SC6 46522 CH CH HY1947 21AU1947 1.55304 1 0.00242 1 (46915 (46758 CH EV 5JN1947 5JN1937 C. 27162 ) C. 66329 ) (46771 EV EV EV EV 11JN1937 25JL1937 30AU1537 60C1937 4.65979 ) 0.01444 ) 46743 46747 EV EV 20JM937 1AU1937 C. 19697 ) 0.01238 1 (46764 (46763 EV EV 17JL1937 23AU1937 C. 12087 ) C. 06088 } (46765 (46744 0.02789 ) 0.01463 ) 46760 46748 EV EV 22SE1937 130C1937 0.01970 ) 0.04270 ) (46750 (46767 EV EV 24SE1937 270C1937 C. 04242 ) 0.23984 ) (46749 J4675L EV EV 12CR1938 30MR1938 0.18204 ) 0.35730 ) 46768 46772 EV EV 16MR1938 18AP1938 0.23519 ) 0.11356 1 (46762 (46756 EV EV 18KR1538 27AP1938 C. 19850 I 0.79923 1 (46759 ( 1224 EV B 4 19MY1938 18MY1964 1.60702 ) 0.OC196 ) 46761 1225 EV C 6 27MY1538 15HY1964 C. 99204 1 0.01568 ) (46766 ( 1226 EV C 7 14061538 16MY1564 C. 09506 1 C.C4186 ) ( 1227 ( 1230 C1 E a D E 2 2 13MY1S64 16MY1S64 0.00219 ) 0.01185 ) 1228 1231 0 E 2 7 14KY1964 16MY1964 0.00584 ) C. 01712 ) ( 1229 ( 1232 0 E 5 5 14MY1564 16MY1564 C. 03595 1 CO 1044 ) ( 1233 ( 1439 3 6 3 3 5JN2964 5JN1964 11JN1964 13JN1S64 0.03096 1 0.76923 ) 1234 1236 B C" 3 1 18JN1964 8JN1964 C. 98403 I 0.00875 ) ( 1235 ( 1237 C c 7 2 16JN1564 8JN1564 C. 05649 ) C. 15077 1 ( 1238 ( 1242 0.02800 ) 0.0C749 ) 1240 1243 D E 6 6 10JM964 13JN1964 0.05215 > 0.32156 1 ( 1241 ( 1244 E F 2 1 13JN1964 11JM964 0.10350 1 C.0C439 ) ( 1245 F B C C 2 3 3 1 11JN1964 24JL1964 8JL1964 16JU564 0.01729 ) 0.68968 ) 1246 1440 F E 3 6 11JN1964 11JL1964 0.04183 ) 4.38516 ) ( 1247 ( 1441 B 8 3 6 14JL1964 24JL1964 1.49400 ! 2.92958 I ( 1249 0.01358 ) 0.53835 ) 1250 1253 C C> 6 2 10JL1964 16JL1S64 1.62795 I C.C8673 ) ( 1251 ( 1254 C 0 7 2 16JL1964 15JL1964 C. 23466 ) 2.41333 ) ( 1255 ( 1258 0 F 5 1 15JL1964 6JL1964 5.21020 ) 1.98221 ) 1256 1259 E F 2 2 14JL1964 6JL1964 1.79527 1 2.16906 1 ( 1257 ( 1260 E F 3 3 14JL1964 6JL1964 1.CC490 1 2.13916 ) ( 1261 e B 3 6 2AU1564 16AU1964 0.01766 ) 0.C1581 ) 1262 1264 B C 3 1 17AU1964 10AU1964 0.03780 ) C. 07916 ) ( 1442 ( 1265 B C 6 2 2AU1964 10AU1964 1.43296 ) C. 44710 1 ( 1266 ( 1269 0 E_ 3 3_ 18AU1964 15AU1964 4.91090 ) C. 29600 ) 1267 1270 D F 6 1 18AU1964 10AU1964 0.C2810 ) 0.10619 ) ( 1268 ( 1444 E B 2 6 15AU1964 19SE1964 2.48933 ) 0.00606 ) ( 1271 C 7 1 22SE1S64 17SE1964 0.02611 ) 0.02815 ) 1272 1275 0 1 2 10SE1964 17SE1964 0.00821 ) 0.26450 ) ( 1273 ( 1276 C" 0 2 3 10SE1964 18SE1964 C.C2688 ) 0.C4470 ) ( 1277 D E F 4 ?. 5 2 18SE1964 16SE1964 16SE1964 15SE1964 0.02479 ) 0.C4085 ) 1278 1281 D E 6 3 18SE1964 16SE1964 C. 01153 ) 0.11380 ) ( 1279 ( 1282 e E 1 4 16SE1964 16SE1564 C.2C811 ) C. 15512 i ( 1283 ( L26i> 0.25745 ) 0.16419 ) 1284 1287 E F 6 3 17SE1964 15SE1964 C. 26372 ) 0.32026 ) ( 1285 ( 1268 F B 1 3 15SE1564 150C1964 0.08736 ) 0.07619 ) ( 1445 I 1 791 B C" 6 2 140C1564 160C1964 0.68493 ) 0.01468 1 1289 1292 C D 7 1 14CC1564 .-...A5CC19A4 C. 80032 ) 0.23852 ) ( 1290 ( 1293 c 0 1 2 160C1964 15CC1964 C. 03411 ) C. 56127 _) 162 1 1294 L_1297_ D D 3 A 150C1964 140C1964 0.57685 ) 0.33319 ) 1295 1298 0 E 4 1 15CC1964 120C1964 C. 74920 1 0.10233 ) 1296 1299 D E 5 2 140C1964 12DC1964 C.6C196 J C. 33930 ) ( 1300 ( 130 3__. E E_ F C 3 _6 3 1 130C1964 .. 13CLC1964 110C1964 10N01964 0.70163 ) 0.82279 ) 0.04712 ) 1.12555 ) 1301 1304 1207 1310 E F 4 1 130C1964 11QC1964 3.09105 ) C. 14571 ) 1302 1305 E F 5 2 130C1964 U0C1964 1.7CC54 ) C.1C178 ) ( 1306 ( 1309 B C 6 2 1*101964 10N01964 C. 26699 ) 2.69841 ) 1308 1311 C 0 7 I 6NG1964 8N01964 1.38386 ) 2.34766 1 ( 1312 1 1315 D 0 E E 2 5 2 5 8N01S64 9N01S64 0.94366 ) 1.91083 ) 1313 1316 C 0 3 6 9N01964 9N01964 2.70270 ) 0.34376 I 1314 1317 c E 4 1 9N01S64 6NC1964 1.2C575 ) 2.68C55 ) { 1318 [ 1321 7N01964 7N01964 2.92982 1 3.79876 ) 1319 1322 E E 3 6 7N01964 7N01964 2.93247 ) 7.46492 ) 1320 1323 E F i 1 7N01S64 6N01964 4.34333 ) C. 15052 ) ( 1324 1 1337J F C 2 3 6N01964 2HR1967 0.06289 1 1.23459 1 1325 1338 F C 3 3 6N01964 28HR1967 0.00252 1 2.03628 ) 1336 1339 C C 3 5 27JA1967 28NR1967 C. 74134 ) C. 37102 ) ( 1340 1 1343 C A 7 6 28MR1967 19AP1967 0.61082 ) 0.02848 ) 1341 1344 A C 3 3 19AP1967 25AP1967 0.27771 I C. 21011 ) 1342 1345 A C 4 5 19AP1967 25AP1967 1.36957 ) 3.68399 ) ( 1346 1 1368 C A. E A 7 _1 3 4 21AP1967 4MY1967 7MY1967 23MY1967 0.5608C ) 0.00628 ) 1347 1369 E A 2 4 23AP1967 4KY1967 0.83570 ) 0.01491 ) 1348 1374 E E 5 2 23APX967 7MY1967 C. 62371 ) C.C5380 ) ( 1375 ( 1409 0.00241 ) 0.0C29S 1 1376 1410 E A 5 6 6MY1967 24KY1967 0.01405 I 0.CO564 ) 1408 1411 A C 3 3 23MY1967 31NY1967 C.CC447 1 C.CC410 1 ( 1412 ( 1415 C E 5 3 31MY1967 28MY1967 0.00842 ) 0.00450 ) 1413 1416 C E 7 5 25MY1967 28MY1967 0.00316 ) 0.00875 ) 1414 1431 E A 2 28HY1967 12JN1967 C.C1008 ) C. 03605 ) ( 1432 < 1435 A C 4 7 13JN1967 13JN1967 0.03576 I 0.01579 ) 1433 1436 C E 3 2 17JN1967 15JN1967 C. 56840 ) 0.01447 ) 1434 1437 C E 5 3 17JM967 15JN1967 C.C3888 ) C.C1615 ) ( 1438 ( 1449 E c 5 3 14JN1967 16JL1967 C. 01089 ) 3.74489 ) 1446 1450 A C 3 11JL1967 16JL1967 1.02735 ) 2.13272 1 1447 1451 A C 4 7 11JL1967 16JL1967 3.76591 ) 0.59840 ) ( 1452 I 1503 E A 2 4 14JU967 28AU1967 C. 96862 ) 0.00515 ) 1453 1509 E C 3 5 15JL1967 2SE1967 1.41546 ) 0.20692 1 1454 1510 E C 5 7 15JL1967 29AU1967 1.82036 ) 0.00948 ) ( 1511 „(„ 15.32 E A E GS 2 3 2 4 1SE1967 18SE1967 2.57851 ) 0.0C329 ) 1512 1536 E E 3 2 1SE1967 24SE1967 0.46725 ) 0.52626 1 1513 1537 E E 5 3 31AU1967 24SE1967 C. 04561 ) C. 13801 ) ( 1541 ( 1380 110C1967 9HY1967 0.02661 1 0.00168 ) 1542 1381 E GS 3 5 110C1967 10PY1967 C. 16273 1 C. 01193 I 1543 1384 E GS 5 8 10GC1967 10MY1967 C. 01437 ) C.CC185 ) ( 1385 ( 1388 GS 9 GS12 10MY1967 12HY1967 0.00471 ) 0.00603 ) 1386 1389 GS10 GS13 12KY1967 12MY1967 C. 00575 ) 0.00258 I 1387 1390 C-Sll GS14 12MY1967 12KY1967 C.C1584 ) C.C1174 ) ( 1392 I 1395 GS16 GS19 12MY1967 13MY1967 0.00308 ) 0.00235 1 1393 1398 GS17 GS22 13PY1967 14MY1967 0.00274 ) 0.01214 ) 1394 1554 GS18 GS 1 13MY1967 30C1967 C.CC860 ) C. 31310 1 ( 1555 ( 1560 GS GS 2 8 30C1967 4CC1967 0.44845 ) 0.02834 1 1557 1561 GS GS 4 9 30C1967 40C1967 0.02616 ) 0.00587 ) 1558 1562 GS 5 CS10 4CC1967 50C1967 C.0C396 ) C. 02220 ) ( 1563 ( 1568 GS11 GS16 50C1967 5GC1967 0.00935 I 0.01010 1 1565 1573 GS13 GS21 50C1967 60C1967 0.01521 ) 0.00112 ) 1566 1544 GS14 CU 1 SB 1 CA 1 50C1967 20C1967 20SE1967 30C1967 C. 00367 ) C.CC238 ) 1 1546 J 1529 LU KW 1 1 20C1967 20SE1967 0.00500 ) 0.01199 ) 1527 1530 TR FR 1 1 20SE1967 24SE1967 0.00629 ) C.C1000 1 1528 1548 C.C1444 ) C.C1272 ) ( 1549 ( 1553 MO SG 1 1 4CC1967 60C1967 0.0137C ) 0.02938 1 1551 1351 ES MI 1 2 5CC1967 21AP1967 0.05592 ) C. 17688 ) 1552 1427 SM 1 2 60C1967 29MY1967 0.C1981 ) C. 03632 i ( 1399 ( 1352 Pu KM ES CH 2 2 2 2 5MY1967 21AP1967 12MY1967 23MY1967 0.01360 ) 0.18897 ) 1402 1354 TR GH 2 2 6PY1967 25AP1967 0.01624 ) 0.C1726 1 0.01437 ) C.C0856 I 1400 14C3 1419 1424 SB CA 2 2 6KY1967 10MY1967 23KY1967 25IYY1967 C. 01191 ! C. 01308 ) ( 1405 ( 1421 0.03870 ) 0.01735 I 1349 1423 CI WA 2 2 19AP1967 25PY1967 KN 2 2 C.C3662 1 C. 01332 ) Rhizosolenia gracilis H. L. Smith R'hizosolenia gracilis H. L. Smith, Proc. Amer. Soc. Micr., 5:177, pi. 1, fig. lb. 1882. Cells bacilliform with a single conspicuous spine at each end. Valves much reduced, appearing as a cap at the ends of the cells. Cells elongate in the pervalvar axis and laterally compressed. Specimens from Lake Michigan 55-250u long, 4-12u broad at the greatest diameter, only 2-4u broad at the least diameter.. Intercalary bands numerous, similar in structure to a flat- tened split-ring. Frustules very lightly silicified, structure of the inter- calary bands and imbrication line poorly visible. The terminal spines are only slightly excentric and are very long and fine. This species is occasionally taken in plankton collections from Lake Michigan, most usually in regions that, have undergone some degree of eutro- phication. It is extremely variable in structure, and malformed specimens are common. This species is usually destroyed in diatom cleaning procedures and is easily overlooked in living material due to its delicate structure. 623 RhJLfiNGJLi_TCT_NLOF_ST»TIC>NS 123 .1.60973 C.H. CH EV 1876 0.28342 ) 46924 CH 10MY1946 0.00564 ) 469C9 CH MR1947 C. 00455 ) (46916 (46771 4MY1947 11JN1937 0.00170 ) 1.19823 ) 469C6 46747 Ch EV MY1947 1AU1937 0.43140 ) 0.00495 ) 46907 46750 CH EV JU947 24SE1937 C.0C049 ) C.0C471 ) (46767 (.46759 EV EV 27CC1937 19MY1938 0.01547 ) 0.00338 1 2.83745 I 0.01738 ) 46772 46761 1441 1252 EV EV B C 6 1 18AP1938 27MY1938 0.014 19 ) 0.07631 ) 46756 1439 EV B 6 27AP1S38 5JN1964 C. 03526 ) C. 69930 ) ( 1440 ( 12 51 B 6 C 7 D 2 E 3 11JL1964 16JL1964 15JL1964 14JL1964 24JL1964 16JU964 C. 30838 ) C. 01395 ) 1250 1253 C c 6 2 10JL1964 16 JL 1964 C. 96197 ) C. 01369 ) ( 1254 < 1257 0.32178 ) 0.83742 1 1255 1258 D F 5 1 15JL1964 6JL1964 1.61696 ) 0.00472 ) 1256 1259 E F 2 2 14JL1964 6JL1964 C. 18136 1 C. 12705 ) ( 1260 i_J.26J3_ F 3 6JL1964 15AU1964 0.09359 ) 0.00821 I 1442 1269 B E 6 2AU1964 15AU1964 C. 01706 ) 0.01370 ) 1265 1273 C" C 2 2 10AU1964 10S61964 C. 01341 ) ( 1281 1 .1285 t 3 _F 1. C 7 . 0 4 16SE1964 15-S.EL964 140C1964 15CC1964 0.00785 1 0.01165 1 0.02199 1 0.C2378 ) _ . 1282 1288 E B 4 16SE1S64 150C1964 C. 011.08 ) C. 00435 ) 1283 1445 E B 5 6 16SE1964 14GC1964 C. 04291 ) C.CC978 ) ( 1289 ( 1295 1293 1296 C 0 2 .5 ... 15CC1964 14GC1964„ C. 00943 ) 0.C2754 1 1294 1297 D D 3 6 150C1964 140C1964 C.C1319 1 C. 00571 1 163 ( 1298 I 1301 E 1 4 12CC1964 130C1964 0.00269 ! 0.00883 ) ( 1299 ( 1303 E E 2 6 12CC1964 13DC1964 0.01257 I 0.00560 1 13C0 1304 E F 3 1 130C1964 U0C1964 C.0C716 ) C.CC494 ) 1 1305 ( 1103, . F _C.' D 0 2 1 11DC1964 10N01964 0.00173 ) 0.02251 ) ( 1307 1 1310 B C 6 2 N01964 10N01964 C. 01082 ) 0.03401 ) 1308 1311 C D 7 1 6NC1964 8N01964 0.C2129 ) C. 09287 ) ( 1312 ( 1315 2 5 8N01964 9N01964 0.02794 ) 0.02275 ) ( 1313 ( 1316 D 0 3 6 9N01964 9N01964 C. 10618 ) C. 00756. 1 1314 1317 0 E 4 1 9N01964 6NC1964 0.05742 ) C.1S530 ! ( 1318 1 1321 E 2 F 5 7N01964 7N01964 0.C2854 ) C. 00638 ) ( 1319 ( 1322 E E 3 6 7N01964 7N01964 C. 02095 ) C.C0333 ) 1320 1323 E F 4 1 7N01964 6N01964 C.0C827 ) C. 00557 ) < 1336 I U4fi C C 3 27JA1967 28MR1967 0.00193 ) 0.00654 ) ( 1337 ( 1341 C A 3 3 2MR1967 19AP1967 0.01911 ) 0.C141O I 1339 1342 C A 5 4 28MR1967 19AP1967 C.0C624 ) 0.31581 1 ( 1343 1 134ft A r. 6 7 19AP1967 21AP1967 0.02640 ) 0.15PP.9 1 ( 1344 ( 1347 C F 2 2 25AP1967 23AP1967 0.01158 ) 0.02764 1 1345 1348 C F 5 5 25AP1967 23AP1967 C. 12475 ) C.C9596 ) 1 1368 ( 1376 A E 3 5 4MY1967 6PY1967 0.00628 ) 0.CC562 ) ( 1370 ( 1411 A C 6 3 3MY1967 31PY1967 0.00230 ) 0.00410 ) 1374 1414 E E 2 ? 7MY1967 28MV1967 0.02690 ) C.CC336 ) I 1416 I 1433 E C 5 3 28HY1967 17JN1967 0.00219 ) 0.32296 I ( 1431 ( 1434 A C 3 c 12JN1967 17JN1967 0.04635 ) 0.0C598 ) 1432 1435 A C 4 7 13JN1967 13JN1967 0.02044 ) C. 01894 ) 1 1446 1 1450 A C 3 5 UJL1967 16JL1967 0.85612 ) 1.33295 ) ( 1447 ( 1451 A C 4 7 11JL1967 16JL1967 0.65494 ) 0.08267 ) 1449 1452 c E 3 ? 16 JL 1967 14JU967 1.60495 ) C. 16605 ) ( 1453 i ,1512_ E E 3 3 15JL1967 1SE1967 0.25782 ) 0.02749 1 < 1454 ( 1538 E E 5 5 15JL1967 23SE1967 0.16603 ) 0.00552 ) 1511 1381 E GS 2 5 1SE1967 10MY1967 C. 00614 ) C.CC239 ) ( 1383 .J-JL392 GS 7 GS16 10MY1967 12MY1967 0.00267 I 0.00308 ) ( 1386 ( 1395 GS10 GS19 12MY1967 13MY1967 0.00287 ) 0.00117 1 1387 1398 GS11 GS22 12MY1967 14KY1967 C. 00792 ) C.CC911 ) I 1556 I 1399 GS PW 3 2 30C1967 5MY1967 0.0C521 ) 0.01360 ) ( 1547 ( 1400 MS SB 1 2 2CC1967 6MY1967 0.00798 ) C. 00596 1 1351 1352 CI KU 2 2 21AP1967 21AP1967 C. 11171 ) C. 03436 ) ( 1353 X 1419 FR BU 2 2 23AP1967 23NY1967 0.01055 ) 0.01831 ) ( 1403 ( 1423 CA KA 2 2 10MY1967 25MY1967 0.01308 ) C. 00428 1 1407 1424 SH KM 2 2 14MY1967 25HY1967 C.0C597 ) C. 01332 ) Genus Rhoioosphenia Grun. Grunow, Verh. Zool.-Bot. Ges . Wien, 10:511. 1860. Members of the genus Rhoioosphenia find their primary habitat in peri- phyton communities. Occasional specimens are taken in plankton collections from Lake Michigan, particularly in nearshore areas. Rhoioosphenia ourvata (Kutz.) Grun. Gomphonema ouwatum Kutzing, Linnaea, 8:567, pi. 16, fig. 51. 1833. Rhoioosphenia ourvata (Kutz.) Grunow ex Rabenhorst, Fl. Europaea Alg., p. 112. 1864. 624 RCCURVAT TCT KG OF STATIONS 64 ( 35A1 __ CH CH EV EV 1FE1881 0.00978 ) 46917 Ch 12JA1946 0.00028 ) 46923 CH 22NG1946 C.CC219 ) (46920 L46J47 _ 20DE1946 IAU193 7 0.00062 ) 0.01485 ) 46922 46763 CH EV 21AU1947 23AU1937 C. 00097 ) 1.56250 ) 46764 46752 EV EV 17JL1937 15SE1937 C.0C806 1 C. 26121 ) (46750 (46749 24SE1937 12MR1938 0.00943 ) 0.01214 ) 46748 46768 EV EV 130C1937 16MR1938 C. 17079 ) 0.C147O ) 46767 46762 EV EV 270C1937 18MR1936 C. 01547 ) C.C2206 1 (46751 LJ341 EV A 3 A 3 -JLSX2 GS15 MI 1 30MU938 19AP1967 26AU1967 12MY1567 0.01117 1 0.00108 ) 1272 1342 C' 1 A 4 10SE1964 19AP1967 0.00821 ) 0.00180 ) 1285 1343 F A 1 6 15SE1964 19AP1967 23SE1967 40C1967 C.C0582 ) C.0CC69 1 ( 1504 1 1348 0.00247 ! 0.00603 ) 1536 1557 E 2 GS 4 24SE1967 30C1967 0.00273 I 0.00374 ) 1538 1561 E GS 5 9 C. 02210 ) C.0G587 ) ( 1567 I 1524 50C1967 2CSE1967 C. 00476 ) 2.03590 1 1569 1546 GS17 LU 1 50C1967 2GC1967 0.00297 ) C. 03001 ) 1575 1520 GS28 KO 1 60C1567 16SE1967 C.CC367 ) 0.05658 1 I 1521 ( 1525 SH PW SB GH_ 1 1 1 18SE1967 20SE1967 0.06347 ) 0.08355 ) 1522 1526 BH 1 MO 1 18SE1967 20SE1967 0.00912 ) 0.81356 1 1523 1527 RA TR 1 1 19SE1967 20SE1967 C. 18450 ) C. 08176 ! ( 1528 ( 1531 2CSE1967 25SJ1967 0.23101 1 0.10989 ( 0.01370 1 0.01469 ) 1529 1545 Kh 1 ML 1 20SE1967 20C1967 0.62358 1 0.10812 I 1530 1548 FR CA 1 1 24SE1967 30C1967 C.C2000 ) C. 05088 ) ( 1549 I 1551 CO Sfi 1 1 40C1967 6CC196 7 1552 1428 SM 1 MU 2 6GC1961 29*Y1967 C.C066C 1 0.00603 ) 1550 1426 CR KS 1 2 5CC1967 29MY1967 C. 01239 ) 0.03150 ) ( 1351 L 1350 fl _BJ± TR _GH_ WA 2 2 2 2, 2 21AP1967 19AP1S6J 6KY1967 25AP1967 25MY1967 0.00310 ) 0.03524 1 0.01624 ) 0.00173 I 1427 1399 LU 2 PW 2 29MY1967 5MY1967 C. 03632 » 0.O0680 ) 1417 1401 FC HO 2 2 22MY1967 6MY1967 C. 00374 ) 0.01176 ) ( 1402 ( 1354 1400 1429 se 2 WL 2 6HY1967 29PY1967 0.07148 ) C. 01062 ) 1352 1403 CA 2 2 21AP1S67 10MY1967 C.CC859 ) C. 01308 ) ( 1423 0.0C428 ) Rhoieosphenia curvata var. subaouta M. Schmidt Rhoi-cosphen-ia curvata var. subaouta M. Schmidt in: A. Schmidt, Atlas Diat., pi. 213, figs. 6-7. 1899. 625 ROCURVVS TCT r>C CF STATICNS 1 I 1544 "mU~T 20C1567 6.0C238 ) Genus Rhopalodia 0. Mull. 0. Muller, Bot. Jahrb., 22:55. 1895. Members of the genus Rhopalodia are adapted to epiphytic growth on aquatic vascular plants and the coarser species of algae. Occasional speci- mens are noted in plankton collections from Lake Michigan, particularly those from nearshore areas. 164 Rhopalodia gibba (Ehr.) 0. Mull. Navicula gibba Ehrenberg, Infusionsthierchen, p. 184, pi. 13, fig. 19. 1838. Rhopalodia gibba (Ehr.) 0. Miiller, Bot. Jahrb., 22:65, pi. 1, figs. 15-17. 1897. 626 RPGIEBA TCI NC OF STATIONS (609T3 CH 1876 0.02362 I ( 1285 F 1 15SE1964 0.02912 ) ( 1379 C-S 3 9MY1967 C. 00309 ) I nil r,H 1 25Sfrl967 0.00845 ) ( 1553 SG 1 6GC1967 0.00734 I ( Rhopalodia gibba var. ventricosa (Kutz.) V. H. Epithemia ventricosa Ktttzing, Bacill., p. 25, pi. 3, fig. 9. 1844. Rhopalodia gibba var. ventricosa (Ktttz.) Van Heurck, Treat. Mat., p. 296. 1896. 628 RPGIBBVV TOT NO OF STATIONS 1 I 1284 E 6 17SE1964 0.0C318 ) ( Rhopalodia gibberula (Ehr.) 0. Mull. Eunotia gibberula Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:126, pi. 3(4), fig. 8. 1843. 627 RPGIBBAR TCT NO OF STATIONS 1 I 13S0 BJL2 19AP1967 n.oc??n ) ( Genus Stauroneis Ehr. Ehrenberg, Ber. Akad. Wiss. Berlin, 1843:45. 1843. Most members of the genus Stauroneis find their primary habitat in ben- thic communities. Certain species that are abundant in epipelic populations are rather commonly found in plankton collections from Lake Michigan but al- ways in very low numbers. Stauroneis acutiusoula Per. and H£rib. Stauroneis aoutiuscula Peragallo and H£ribaud in: H^ribaud, Diat. Auvergne, p. 78, pi. 3, fig. 20. 1893. 629 SAACOITI TOT NO OF STATIONS 5 ( 1565 GS13 50C1967 0.01521 ) ( 1569 GS17 50C1967 C. 00149 ) ( 1546 LU 1 20C1967 C.0C500 ) ( 1530 FR 1 24SE1967 0.01000 ) ( 1545 UL 1 20C1967 C. 02027 ) ( Stauroneis anoeps Ehr. Stauroneis anoeps Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:422, pi. 2(1), fig. 18. 1843. 63C SAANCEPS TCT NO OF STATIONS 6 (46747 EV 1AU1937 0.00743 I (46750 EV 24SE1937 C. 00471 I ( 13S2 C-S16 12KY1967 C.CC308 ) I 1530 FR 1 24SE1967 0.01000 ) ( 1350 BH 2 19AP1967 0.00220 ) I 1402 TR 2 6MY1967 C.0C541 ) Stauroneis anoeps fo. gracilis Rabh. Stauroneis anoeps fo. gracilis Rabenhorst, Fl. Europaea Alg., sect. 1, p. 247. 1864. 631 SAANCEVH TCT NC OF STATIONS 1 __L_1_406 GB__2^ 13PY_1?67 0.0027C ) ( 165 Stauroneis anceps var. siberica Grun. Stauroneis anceps var. sibevica Grunow in: Cleve and Grunow, K. Svenska Vet. -Akad. Handl. , Ny Foljd, 17(2) :48, pi. 3, fig. 65. 1880. 63? SAANCEVS TOT NO CF STATIONS 5 . JLA6S2 2 CH 21AU1947 0.00048 ) (46764 EV 17JL1937 C. 01612 I 146763 EV 23AU1937 C.C2029 ) I 1575 GS28 60C1967 0.00129 ) ( 1405 ES 2 12MY1967 0.00645 ) ( Stauroneis dilatata Ehr. Stauroneis dilatata Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:134, pi. 1(2), fig. 12. 1843. 634 SADILATA TOT NO OF STATIONS (46764 EV 17JL1937 0.03223 )~ (46757 EV 25JL1937 C. 02889 I (46747 EV 1AU1937 C.0C495 ) (-46-76A. EV 23AU1937 0.02029 I ( Stauroneis nobilis var. baconiana (Stodd.) Retm. Stauvoneis baconiana Stoddard, Proc. Boston Soc. Nat. Hist., 7:26. 1859. Stauroneis nobilis var. baconiana (Stodd.) Reimer, Proc. Acad. Nat. Sci. Philadelphia, 113:204, pi. 2, fig. 1. 1961. 633 SAN0BIVB TOT MC CF STATIONS 1 I 1388 GS12 12FY1967 ~~ 0^00603 j ( Stauroneis phoenicenteron (Nitz.) Ehr. Bacillaria phoenicentevon Nitzsch, (pro parte), Neue Schrift. Naturf. Ges. Halle, 3(1): 92, pi. 4, figs. 12, 14 (non figs. 1-11, 13, 15-22). 1817. Stauvoneis phoenicentevon (Nitz.) Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:387, pi. 2(5), fig. 1. 1843. 61" SAPHCENI TOT NO OF STATIONS 1 L 1 3 90. GS_L4 17HY1967 0.00587 ) I Stauroneis phoenicenteron var. brevis Dippel Stauvoneis phoenicentevon var. bvevis Dippel, Diat. Rhein-Mainebene, p. 82, fig. 176. 1904. 637 SASPECCA TCT NO OF STATIONS I [ 1404 CC 2 lCMYli67 C .C127C ) T Stauroneis smithii Grun. Stauroneis smithii Grunow, Verh. Zool.-Bot. Ges. Wien, 10:564, pi. 6, fig. 16. 1860. 636 SASMITHI TOT NO OF STATIONS 6 I 1389 GS13 12KY1967 0.00258 I ( 1565 GS13 50C1967 0.02028 ) ( 1549 H8 1 40C1967 C.C1370 ) ( 1550 MR 1 50C1967 0.01239 ) ( 1350 BH 2 19AP1967 0.00220 ) ( 14C4 CO 2 10MY1967 0.01270 ) Genus Stephanodiscus Ehr. Ehrenberg, Ber. Akad. Wiss. Berlin, 1845:80. 1845. Stephanodiscus alpinus Hust. ex Huber-Pestalozzi Stephanodiscus alpinus Hust. ex Huber-Pestalozzi, Die Binnengewasser, Band 16, Teil 2, Halfte 2, p. 412, pi. 122, fig. 508. 1942. 166 Cells circular in valve view and rectangular in girdle view. Vegetative cells always occur singly. Valves of specimens from Lake Michigan 7— 33)a in diameter with slightly concave centers. Radial striae usually in biseriate fascicles near the margin, becoming single near the center of the valve, more rarely single throughout or becoming triseriate near the margins. Puncta in radial striae small but distinct, 18-22 in lOy. Fascicles are rather widely separated by conspicuous, thickened ribs. The marginal spines occur at the ends of the ribs, between the fascicles. Usually a spine is present at the end of each rib but occasionally, especially in the small individuals, spines may be irregular or lacking. Fascicles and spines 7-10 in lOu at the margin of the valves. Although this species has only recently been reported from Lake Michigan (Stoermer 1967), specimens included in our concept of the taxon are present both in modern samples and in samples dating back to 1876. Previous reports probably refer this species to StephanodCsaus astraea (Ehr.) Grun. or S. astraea var. minutula (Kutz.) Grun. Huber-Pestalozzi (1942) reports this en- tity is abundant in the hypolimnion of alpine lakes. 638 STALPINU TCT NC OF STATICNS 256 6C973 3507 CH _£_!_ ie76 19FE1881 0.49598 ) 0.30564 ) ( 3540 (46910 CH CH 11PY1879 0C1945 0.29819 ) C. 00109 ) ( 3541 146921 CH CH 1FE1681 23NG1945 C.7C429 C. 00323 46917 46924 469C5 46916 46907 46743 CH CH CH CH CH EV 12JA1946 10^Y1946 JA1947 4MY1947 JL1947 20JM937 0.00582 0.01058 0.0C490 0.00611 0.32052 0.01285 ) (46915 (46923 (469C9 (46906 (46922 (46764 CF CH CH Ch CH EV 20FE1946 _22_01946^ MR 194 7 MY1947 21*111947 17JL1937 0.0341.4 ) 0.00437 ) 0.59196" ) __C___1_726 ) C. 04362 1 0.01612 1 (46914 1469 20 146912 146919 (46771 146757 Ch CH Ch CH EV EV 19AP1946 200E1946 AP1947 5JM947 11JM937 25JL1937 23064 0C647 C3449 CC910 C1902 0C481 46763 1224 1231 1234 1237 _L_4___ E 3 8 3_ 23AU1937 18MY1964 16MY1964 18JM964 8J .1964 10JN1964 0.02029 I . 0.00392 ) 0.03669 ) C.C1406 ) 0.01031 ) 0.02148 ) (46756 ( 1228 ( 1232 ( 1235 ( 1238 ( 1241 EV C E C D E 27AP193e _14MY1964 16>Y1964 16JN1_96_4_ 11JN1964 13JN1964 C.C0336 ) 0.C0389 ) C.C4174 I 0.00282 ) 0.01200 ) C.C6653 ) (46759 ( 1229 ( 1233 ( 1236 1 1239 ( 1242 EV C B C c E 19MY193E 14KY1964 5JN2964 . 8JM964 11JM964 13JM964 C.CC675 C.C3806 C. 00714 C.CC525 C.CC348 C.CC450 1243 1246 1441 1253 1256 -12__L_ 13JM964 11JM964 24JL1964 16.JL1964 14JL1964 6.11964 0. 01044 I 0.06574 I C.C2423 ) 0.06162 ) 0.C6595 ) 0.06817 ) ( 1244 ( 1247 ( 1250 ( 1254 ( 1257 ( 1260 F 1 B 3 C 6 Li 2 E 3 F 3 11JM964 14JL1964 10JL1964 15JL1964 14JL1964 6JL1964 C. 02741 ) C. 00854 ) C. 01233 ) C. 20686 ) C.C7417 1 C. 0171.9 I ( 1245 I 1440 [ 1252 ( 1255 ( 1258 ( 1261 F 2 B 6 C 1 D 5 F 1 B 3 11JN1964 11JL1964 16JL1964 15JH964 6JL1964 2AU1964 C. 12102 C.C7370 C.C1116 C.3C543 C.C5191 C.CC785 1262 1264 1269 1272 1279 -L283 1286 1289 1294 1299 1302 17AU1964 10AU1964 15AU1964 10SE1964 16SE1964 USE 1964 0.01050 ) 0.00579 1 0.17267 1 0.C041C 1 0.01571 ) .C1226 1 ( 1442 ( 1266 ( 1270 ( 1275 ( 1280 ( 1284 2A11964 18AU1964 1CAU1964 17SE.1_S.64. 16SE1964 17SE1964 C. 00341 ) 0. 049 1.1 ) 0.01634 ) C.C0645__I 0.006 91 1 0.00635 1 ( 1263 ( 1268 I 12 71 ( 1278 ( 1281 ( 1285 15AL1964 15AU1964 22SE1964 18SE1964 USE 1964 15SE1964 C.CC40C C. 17234 C. 01306 C.0C769 C.CC392 C.C2912 1309 1313 1316 1319 1322 1336 1339 1343 134 7 1370 1374 1409 C 1 0 3 0 6 E 3 E 6 _C_JJ__ 15SE1964 14CC1964 151X1964 12CC1964 130C1964 _iJJ_CJ__6__ 0.02189 C.CC879 ) 0.00659 1 0.00943 1 0.08503 1 C. 00345 1 ( 1287 ( 1292 ( 1296 I 1300 I 13C3 I 13C6 15SE1964 15CC1964 14CC1964 130C1964 13CC1964 U0C1964 1CMU1964 9NC1964 9NC1964 7NC1964 7h01964 27JA1967 0.00161 I C.C2896 ) 0.CC378 1 C. 00785 ) 0.0C333 ) C.0C578 1 ( 1310 ( 1314 ( 1317 ( 1320 ( 1323 ( 1337 C. 03002 I C. 00373 1 C. 01574 1 C. 04654 ) 0.00560 ) C. 00554 I ( 1445 ( 1293 ( 1298 ( 13C1 1 1304 ( 1308 10N01964 _ 9N01964 6NC1964 7NC1_964_ 6NC1964 2?R1967 C. 00227 ) 0.00861 _)_ 0.00 766' ) 0.01861 I 0.00279 ) C.C0588 ) ( 1312 (_ 1315 i 1318 t 13_21_ ( i~325 ( 1338 2SCR1967 19AP1967 23AP1967 3KY1967 7MY1967 23MY1967 0.C5300 1 C.0C625 ) 0.00163 ) 0.C1611 I 0.00598 ) 0.00893 1 ( 1340 ( 1345 ( 1348 ( 1371 ( 1375 ( 1410 0 2 C 5 E 2 E_ 5 F 3 C 3 14CC1964 150C1964 120C1964 13CC1964 110C1964 6NC1964 8N01964 9NC1964 7NC_964 _7__C1964_ 6NC1964 28EP1967 C.C1305 C.CC472 C.CC539 C.CC883 C.CC741 C.C1217 C.CC310 C.CC91C 0.01332 C.CC958 C. 00504 C.C1190 28^R1967 25AP1967 23APi967 4NY1967 0.00509 ) _0.0_0_585_ 1_ C. 01234 ) 0. 00462 ) ( 1341 ___13_46_ ( 1369 (137 2 7MY1967 24PY1967 0.01684 ) C. 01128 ) A 3 C_7 A 4 C 5 19AP1967 21AP1967 4MY1967 5MY1967 ( 1376 ( 1411 E 5 C 3 6MY1967 31BY1967 C.CC759 C.0C401 C.CC745 C..___8_37 C.CC843 C. 02051 1414 1433 1436 1449 1452 1504 1512 J-534„ 1537 .15___ 1543 1379 1382 U8.5 _ 1388 .139 L 1394 1397 t 2 C..3 E 2 C 3 E 2 A 3 E 3 _4_6_ 28HY1967 17JM967 15JN1967 16JL1967 14JL1967 0.00336 ) 0.0C646 1 0.00724 ) C.CC764 ) 0.00639 1 ( 1416 ( 1434 ( 143 8 ( 1450 ( 1453 28AU1967 0.00988 ) _________ 1SE1967 19SE1967 0.01571 1 0.CC310 I ( 1532 ( 1535 E 5 C 5 E 5 C 5 E 3 C 5 28MY1967 17JN1967 i4JN196> 16JL1967 15JL1967 0.00656 ) C. 01196 ) 0.CC363 ) __0_._00571_l C.01C1.1 T ( 1432 ( 1435 A 4 ______ ( 1446 J 1*51 ( 1454 24SE1967 _______________ 0.08626 I 0.0C993 ) A 3 C 7 2SE1967 C.01009 I I 1511 18SE1967 20SE1967 ( 1538 I 1541 E 5 ________ 23SE1967 U0C1967 0.00986 ) 0.C0322 ) ( 1533 < 1536 A 3 C 7 E 5 F- 2 13JN1967 13JN1967 11JU96 7 _16__L 19 6X 15JL1967 C.0C255 C.C2210 C.CC245 _C_.0_C19 7 C.C1200 A E 2 15E1967 C.C1842 ) C. 02762 I C.C479C ) ( 1539 ( 1542 C 3 E 3 19SE1967 _____________ 40C196 7 110C1967 C. 00464 I _C.C1636_!_ C.C1510 ) C. 32038 ) E 5 GS 3 GS _____ GS12 _GS15_ GS18 GS21 10CC1967 9CY1967 0.01437 ) 0.36828 1 ( 1377 1 1380 10MY1967 10WY1967 12PY1967 _J_2__Y_1_9_67 13MY1967 13MY196Z_ 0.06939 I _0._C_25_9C___ 0.3 5596 ) C. 42140 )_ 1.324 5 3 ) _>_tM__J_ GS GS 9KY1967 9MY1967 ( 1383 _(_1386__ ( 1389 ( 1392 ( 1395 ..(1398 GS 7 GS10 10MY1967 J2KY1967 0.01583 I C. 05213 I ( 1378 ( 1381 GS 2 CS 5 GS13 G_i.6_ GS19 GS22 12NY1967 12KY1967 0.09356 ) 0.27866 ) 13MY1967 14MY1967 0.08767 1 0.72118 ) < 1384 ( 1387 9MY1967 10MY1967 C.0C841 ) C.C3101 1 ( 1390 ( 1393 0.18202 ) 0.12448 ) ( 1396 ( 1554 GS 8 ______ GS14 GS17 CS20 CS 1 10MY1967 ________t_9 67 12HY1967 13KY1967 13KY1967 30C1967 C. 66550 ) C_. 79214 ) C. 39342 1 0.54789 ) C. 05179 ) C. 01423 I 167 1555 1558 1561 1564 1567 1570 1573 1 54.4. 1546 152.3__ 1527 1530 Ob 2 _G_S 5__ GS 9 _GS12 GS15 GS18 3UL1S6 / _4GC196 7 40C196 7 5CC1S67 50C1967 5GC1967 U.U1U5V I _0.05_549_ ) 0.0058 7 ) 0.0.06 5 S )_ 0.31754 I 0.87267 I I 135C <_ 155i_ I 1562 ( 1565 ( 1568 [ 1571 GS 7 GS10 GS13_ GS16 GS19 JUC196 f 4GC1967 50C1967 _5GC1967 V.lVIbb I C. 01399 I C. 00740 V 50C1967 60C1967 C. 12698 ) C. 04507 ) J 560 1563 1566 1569 1572 Ob 4 C-SJ! G'sir _GS14 GS17 CS2C 3C1C1967 4CC1967 5CC1967 50C1967 50C1967 6EC1967 C. 23169 ) C.C1417 ) 0.0 3040 ) C.C3302 ) C. 55594 ) C.C1622 I GS21 .KU. 1 LU 1 JBA. l._ TR 1 FR 1 6GC1967 __2CC1967 20C1967 _19_SE1967 2CSE1967 24SE1967 0.22622 ) _C_. 22.160 J 0.88031 1 ...0..C36SC ) 0.18239 ) C. 01000 1 ( 1574 ( 1547. ( 1520 J 1525 ( 1528 1 1531 GS22 MS 1 60C1967 20C1967 C. 04027 1 C. 27944 ) FC 1 PW 1 SB 1 GH 1 18SE1967 20SE1967 0.75440 ) C. 01393 ) 20SE1967 25SE1967 0.07219 ) C. 29586 ) 1575 1524_ 1521 1526 GS28 VI 1 SH i va l 1529 1545 KW WL 60C1967 _20SE196 7 18SE1967 20SE1967 20SEi967 20C1967 C.25804 ) C .^32837 ) C.3C002 ) C. 15930 1 C.C5996 ) 1.94608 I 1548 1552 1428 1427 1350 1401 CA 1 ..SM 1 MU 2 ..UL2._ BF 2 HO 2 30C1967 60C1967 2 9 fY 196 7 _2 9MY1967 19AP1967 6MY1967 0.07633 ) 0.16507 )_ 0.10546 ) 0.5C847 I C. 12995 ) C. 84078 ) ( 1549 I 1550 ( 1426 ( 14 17 ( 1425 I 1402 PS 1 MR 1 MS 2 _H0_2 RA 2 TR 2 40C1S67 5GC1967 2 9KY196 7" 22MY_156_7 25MY1967 6CY1967 C. 09593 ) J3/73101 ) 0.03150 I Ji_59818_ I C.39784 ) 1.03964 ) 1551 1553 1351 1418 1399 1400 ES 1 S_G 1 CI 2 _S_H_2 PW 2 SB 2 5GC1967 60C1967 21AP196 7 _22MY1?67 5CY1967 6MY1967 C.67C98 ) 0.49941 ) C. 19550 "')"" C. 24883 I 0.56487 I C.8518C ) C. 14499 ) C.1C163 ) C. 30 17 5 ) C. 18127 I 1352 1429 140 5 1406 1421 1424 KW 2 _WL_2_ ES 2 c.a_2_ CH 2 KN 2 21AP1967 .. .29£Y19_67 12MY1967 13MY1967 23MY1967 25MY1967 0.72153 ) _0.2_972 7 1 0.40635 ) _0._04044_) 0.74601 ) 0.83933 1 ( 1353 ( _1403 I 1407 t 1419 ( 1422 1 FR 2 CA_2_ SM 2 BU 2 23AP1967 10EY1967 0.17932 I _ 1^76540 ) 1354 1404 14MY1967 23MY1967 0.57921 ) 0.58587 ) GA 2 23MY1967 0.77658 1 1349 1420 1423 GH 2 CI 2 IH 2 WA 2 25AP1967 10MY1967 19AP1967 23PY1967 1.52015 ) Stephanodiscus astvaea (Ehr.) Grun. in CI. and Grun. Disco-plea ? astvaea Ehrenberg, Ber. Akad. Wiss. Berlin, 1844:267. 1844. Cyolotella astvaea (Ehr.) Kxitzing, Sp. Alg., p. 19. 1849. Stephanodisous astvaea (Ehr.) Grunow, in Cleve and Grunow, K. Svenska Vet. -Akad. Handl., Ny Foljd, 17 (2): 114. 1880=. Cells circular in valve view and rectangular in girdle view. Vegeta- tive cells always occur singly. Radial striae in biseriate fascicles near the margin of the valve, becoming uniseriate and disorganized near the center of the valve which is markedly concave. Puncta in the radial striae dis- tinct, 16-19 in lOu. The fascicles are closely packed with only a narrow hyaline space separating them. The spines in this species are submarginal and irregularly arranged, usually between every 2-4 fascicles. Fascicles 6-8 in lOu at the margins of the valves. In this taxon the fine, irregu- larly punctate ornamentation of the valve mantle is visible as a margin which is separated from the ornamentation of the valve surface by a narrow hyaline space. The spines arise from the inner border of the apparent mar- gin. Despite the fact that this is the most widely reported species of the genus, numerous problems of both circumscription and formal nomenclature are attached to it. I have not had the opportunity to observe authentic material of Discoplea astvaea. Material annotated by Grunow, author of the combina- tion, upon whose illustrations and verified specimens most modern treatments of this taxon are based is available in the United States and is the basis of our concept of the taxon. Many of the authors that have treated the Lake Michigan plankton have either failed to distinguish this species from S. niagavae or have considered the two taxa to be synonymous. Cleve-Euler (1951) has made a variety, S. astvaea var. niagavae, and has pointed out the close morphologic similarity of the two forms. Although this contention cannot be dismissed lightly, substantial differences do exist in the morphology of apparently discrete populations from the upper Great Lakes region and we chose to take the taxo- nomically conservative position that the two taxa, as circumscribed, repre- sent distinct genetic entities unless it can be shown experimentally that the range of variation observed can be accommodated by a single genome. 168 The formal nomenclature of this species has been beclouded by the great number of "varieties," some with strikingly different morphology, that have been attached to it. It is our contention that a number of these entities should be treated as separate entities as their resemblance to the typical species is, at best, superficial. Hendy (1964) has made a new combination, S. votula (Kiitz.) Hendy, cit- ing S. astvaea (Ehr. ex Kutz.) Grun. in Cleve and Grunow as a synonym. Hendy's reasoning on this is obscure in that Klltzing (1849) clearly indicates that Cyolotella votula Kvitzing (1844) is a later synonym of Visaoplea ? astvaea Ehrenberg (1844) and further makes a new combination Cyolotella astvaea (Ehr.) Ktltz. based on that epithet. In order to make his intentions fully clear he then proceeds to make a new, and by current rules thoroughly illegal, combina- tion C. votula (Ehr.) Klitz. based on Diseoplea ? votula Ehr. (1844). Although KUtzing's name juggling seems to have confused Hendy, such was not the case with Grunow as he clearly refers the specific epithet to Ehrenberg' s type a- long with KUtzing's synonym. This species, despite the relatively large number of reports referring to it, is rare in the plankton of the major portion of the Lake Michigan basin. It occurs in considerable quantity in estuaries and inshore waters that are appreciably eutrophied. It is also one of the most common members of the genus in smaller lakes throughout the state. 635 STASTP.AE TOT NO OF STATICNS ( 1232 E 5 16MY1964 0.0C174 ) 1236 C 1 8JM964 C. 00875 ) 1237 C1 2 8JN1964 C.CC773 ) 1 1238 J JZ66_ _ D n 3 3 1UN1964 18AU1964 0.00200 ) 0.00351 ) 0.00294 ) 0.00180 ) 0. 00511 ) 0. 00185 ) 1241 1274 1338 1411 1437 1389 E 2 C 1 C 3 C 3 E 3 GS13 13JN1964 17SE1964 C. 00296 I C. 00469 ) 1264 1309 C 1 C 1 10AU1964 10N01964 C.0C193 ) C.CC322 ) ( 1337 1 1342. ... c A a GS 3 4 8 2MR1967 19AP1967 13JN1967 10MY1967 28MR1967 31HY1967 15JN1967 12MY1967 0.00132 ) C.C0821 ) 1341 1416 A 3 E 5 19AP1967 28MY1967 C.0C1O8 ) C. 06342 ) ( 1432 1 1384 0.00269 ) C. 00258 1 1380 1566 GS 4 GS14 VC 1 eo 2 9MY1967 50C1967 20SE1967 22HY1967 C.CC168 ) C.0C183 ) ( 1544 I -153X . GH 1 1 20C1967 25SE1967 0.04766 ) 0.01691 ) 1520 1428 HO 1 PU 2 18S61967 29MY1967 C. 39606 ) 0.01808 ) 1526 1417 C. 00569 ) C. 77763 I ( 1418 I 142.9... SH „..WL 2 22PY1967 29MY1967 0.01555 1 0.04247 ) 1350 1406 Bh 2 G8 2 19AP1967 13KY1967 C. 00220 ) 0.11592 ) 1354 1419 GH 2 BU 2 25AP1967 23CY1967 C. 01381 ) C. 07323 1 Stephanodiscus bindevanus (Kutz.) Krieger Melosiva bindevana Kiltz., Bacill., p. 55, pi. 2, fig. 1. 1844. Stephanodiscus bindevanus (Kutz.) Krieger, Pflanzenforsch. 10:21. 1927. Cells circular in valve view and rectangular in girdle view, elongate in the pervalvar axis. Vegetative cells always occur in colonies, attached at the valve surface. Valves of specimens from Lake Michigan 8-22u in dia- meter, valve surfaces planar. The radial striae are not united into well defined fascicles. Ornamentation of the valve surface is very irregular in this species. In some specimens the poroids are arranged in definite rows and a secondary level of radial ribs is visible, in others the ornamentation of the valve is only partially developed and its order is obscured. A bor- der of small, regularly arranged, submarginal spines is present. The slime pores are not directly below the spines on the valve mantle in this species as they are in most other members of the genus. Because of the shallow valve mantle the slime pores, which are irregularly arranged, are highly visible and their thickened bases may be confused with spines unless care is taken. Punc- ta in the radial striae about 20-24 in lOu. Submarginal spines 8-10 in lOy, usually 3-5 spines occur between each slime pore. 169 As Krieger (1927) points out the frustular structure and the sequence of formation of elements of the frustule in this species are essentially similar to other species of Stephanodisous and much different from Melosiva (Reimann 1960) . Its superficial resemblance to the latter genus is only based on its consistent colonial growth habit. A number of the smaller species of Stephanodisous show a greater or lesser tendency to adopt the colonial habit. Great care must be taken if these species are to be distinguished. It is to be emphasized that there is no certain way to distinguish them in living material. This species is apparently a recent introduction into the flora of Lake Michigan. We have not been able to find records of its occurrence prior to 1938. It is now present in polluted inshore areas throughout the lake and substantial spring blooms have been noted in all parts of the lake in the past few years. Its introduction has caused substantial difficulties for filtration plants utilizing water from that lake in that its filamentous growth habit makes it an excellent filter clogger. ___J KFRIMIFR TCT NO OF STATIONS 224 (46921 r.H 23N<11945 0.00065 ) (46514 CH 19AP1946 0.48584 1 (46924 CH (46912 .U6-7_i___ CH EV AP1947 30HR1938 0.01150 1 0.06699 ) (46516 (46772 CH EV 4MY1547 18AP1938 C. 00170 ) 0.01419 ) (46906 (46756 CH EV 15MY1964 0.09408 ) ►Y1947 27AP1538 C. 00133 I C.C6884 ) f 12P7 C ? 13KVI964 0.0r.329 1 1??8 n ? 14MY19A4 0.(11557 1 ( 1729 0 5 14FY1964 C.CC634 1 ( 1230 ( 1233 e 2 3 16MY1964 5JN2964 0.27263 I 0.04287 ) 1231 1234 e 8 3 3 16CY1964 18JM564 0.07093 ) C.C3936 ) ( 1232 ( 1235 E C 5 7 16MY1964 16JM964 1.21743 ) C. 09038 ) ( 1439 8 a 6 3 5JN1964 11JN1964 0.18781 1 O.C280C ) 1236 1239 C" 0 1 4 8JN1964 11JN1564 0.01925 ) C.C5570 ) ( 1237 ( 1240 C c 2 6 8JN1964 10JM964 C. 04383 1 0.01994 ) ( 1241 ( 1244 E F 2 1 13JN1564 11JN1964 0.07393 ) 0.00548 1 1242 1245 E F 2 13JN1964 11JM564 0.00150 ) 0.01383 ) ( 1243 ( 1246 E F 6 3 13JN1964 UJN1964 C. 03758 ) C. 01195 ) ( 1440 ( 1251 B C 6 7 11JL1964 16JL1964 C. 00369 ) 0.00579 ) 1441 1252 B c 6 1 24JL1564 16JL1564 0.00881 ) C. 00558 ) ( 1250 ( 1253 C C" 6 2 10JL1964 16JL1964 0. 01644 ) 0.00228 ) ( 1254 ( 1258 0 F 2 1 15JL1964 6JL1964 0.01724 ) 0.00236 1 1255 1259 D F 5 2 15JL1964 6JL1564 0.00513 ) C.C0930 1 ( 12 56 ( 1260 E F 2 3 14JL1964 6JL1564 C. 06228 ) 0.00382 1 ( 1442 ( 1266 B D 6 3 2AU1S64 18AU1964 0.OC682 1 0.CC351 ) 1264 1267 C D 1 6 10AU1964 18AU1964 0.CC193 ) 0.00649 1 ( 1265 ( 1268 C E 2 2 10AU1964 15AU1964 C.CC224 I C.C2462 1 ( 1270 LX275 F D E 8 1 2 2 3 10AU1964 17SE1964 16SE1964 150C1964 0.00272 1 0.C258C ) 1273 1278 0 2 6 10SE1964 18SE1964 0.C0538 I 0.00384 ) ( 1274 ( 1279 0 E 1 1 17SE1564 16SE1564 C. 04223 ) C. 13743 ) ( 1280 J 1288 0.00681 ) 0.00218 ) 1284 1289 E C 6 7 17SE1564 140C1964 C. 04448 I 0.00440 1 ( 1285 ( 1290 F C" 1 1 15SE1964 16GC1964 C.CC582 ) C.C1137 ) ( 1291 ( 1297 C 0 2 6 160C1564 140C1964 0.00734 1 0.C0190 ) 1253 1303 C E 2 6 15DC1964 130C1964 0.00472 ) C. 00560 ) ( 1294 ( 1308 0 c 3 7 150C1964 6NC1964 C.CC330 ) C.CC304 I ( 1309 ( 1312 c D 1 2 10N01564 8N01964 C. 00322 ) 0.04656 1 1310 1313 C 0 2 3 10NQ1564 9NG1964 C. 00227 I C. 00386 ) ( 1311 1 1314 0 D 1 4 4 3 8N01964 5N01564 C.CC774 ) C.0C574 1 ( 1316 { 1321 0 6 5 9NU1964 7N01964 0.00378 ) 0.00319 ) 4.88690 ) 8.29704 1 1317 1325 E F 1 3 6N01964 6N01964 0.00574 ) C.C0252 1 ( 1320 ( 1336 E c 7NG1964 27JA1567 0.00414 ) C.C1733 ) ( 1337 ( 1340 c c "3 7 2MR1967 28MR1967 1338 1341 C A 3 3 28MR1967 19AP1967 7.40466 ) 1.89840 ) ( 1339 ( 1342 c A 5 4 28MR1967 19AP1967 C. 29307 ) C. 19490 ) ( 1343 I 1346 A ._ c. 6 7 3 3 19AP1567 21AP1967 4MY1567 4MY1S67 42.65C01 1 1.58893 ) 1344 1347 C E 3 2 25AP1967 23AP1967 0.63694 1 1.93480 ) ( 1345 ( 1348 C E 5 5 25AP1967 23AP1967 C. 24755 ) 4.89376 I ( 1368 ( 1371 A c 1.64939 ) 0.03001 ) 1369 13 72 A C 4 5 4MY1567 5MY1967 0. 02236 ) 0.00709 ) ( 1370 ( 1373 A C 6 7 3KY1967 5MY1967 2.41685 ) C. 12836 ) ( 1374 f t4PR ( 1412 ( 1415 6 A C E 2 1 5 3 7MY1567 31HY1567 28MY1967 0.62762 ) n. mi in J 0.00842 ) 0.00450 ) 1375 1410 1413 1416 E A C E 3 6 7 7MY1967 24MY1967 25MY1967 28HY1967 C. 10106 ) r,.c.n*f.A i C. 04422 ! 2.09058 ) 1 1376 1 1411 ( 1414 ( 1431 E C E A 5 3 2 3 6MY1967 31HY1567 28MY1967 12JN1967 2.5579C ) C.CC410 ) C.C1C08 1 C.C1030 1 ( 1432 1 1435 A £_ E C 4 7 5 3 13JN1567 13JM507 14JN1567 16JL1567 0.00766 ) Q. 22101 ) 1433 1436 C E 3 2 17JN1967 15JN1967 0.05167 ) 0.01809 ) ( 14 34 ( 1437 C E 5 3 17JN1967 15JN1967 C.0C299 1 C.CC269 ) ( 1438 ( 1449 0.55919 ) 0.65548 ) 1447 1450 A C 4 5 11JL1967 16JL1967 0.00234 ) 0.00381 ) ( 1448 ( 1451 A C 6 7 10J1.1967 16 Jl. 1567 C.0C354 ) C. 34447 1 ( 1452 I 11*13 E F 2 .5_ 14JL1967 .._3.1AU1.96 7 0.03832 ) Q_,00507 ) 1453 1532 E A 3 3 15JL1S67 18SE1967 0.00758 » 0.00657 ) ( 1511 ( 1533 E A 2 4 1SE1967 19SE1967 C. 01535 ) C.0C464 ) ( 1536 < 1540 E C 2 5 24SE1967 40C1967 0.00273 ) 0.00993 ) 1537 1541 E E 3 2 2 6 24S61567 110C1967 9MY1967 10KY1967 0.00431 ) C.C1064 1 C. 23969 I 1.36001 1 ( 1538 ( 1542 ( 1380 ( 1383 E E GS GS 5 3 4 7 23SE1967 110C1967 9MY1967 10KY1967 C.0C552 ) C. 00509 1 ( 1377 ( 13fll GS GS 1 5 5MY1967 10MY1967 0.0C792 ) 1.0G176 ) 1378 1282 GS GS 1.7656C ) 4.11677 ) ( 1384 ( 1387 GS 8 GS11 I0MY1S67 12MY1567 3.62325 ) 1.52487 ) 1385 .1388 GS 9 GS12 10MY1967 12*Y1967 1.23614 ) 0.42232 ) ( 1386 1 1389 GS1C CS13 12MY1967 12MY1967 2.41310 ) 1.8C491 ) ( 1390 1 1193 GS14 GS17 12KY1967 L3MY1567 1.64416 ) 4.79399 I 15.58951 1 0.00356 ) 1351 L 1394 1357 1555 GS15 CSJ8 ... 12KY1567 13MY1967 4.02241 ) 5.65934 1 ( 1392 ( 1395 GS16 GS19 12KY1967 13KY1967 1C. 13961 ) 45.62321 ) ( 1396 1 1554 GS20 GS 1 13NY1967 3GC1967 GS21 GS 2 13MY1967 3CC1967 54.71146 I 0.00353 ) ( 1398 ( 1557 GS22 GS 4 14HY1567 30C1567 C. 17306 ) (]. 01495 I ( 1558 I 1 56? GS 5 GS10 4CC1567 50C1567 0.01586 ) 0.0074C ) 1560 1563 GS 8 GS11 40C1967 5CC1967 0.02361 ) 0.01871 1 ( 1561 ( 1564 GS 9 GS12 40C1967 50C1967 C. 02935 1 ,..1448 4 ) ( 1565 ( 1568 GS13 GS16 50C1967 5CC1967 0.04056 ) 0.31457 1 1566 1569 GS14 GS17 50C1967 50C1967 0.23298 1 0.01338 ) ( 1567 ( 1571 GS15 GS19 50C1967 60C1567 -.01111 I C. 32782 ) ( 1572 ( 1575 GS20 GS28 60C1967 6CC 196 7 0.34700 ) 0.07225 ) 1573 1544 GS21 MU 1 6GC1967 20C1967 1.80305 ) C. 00715 ) ( 1574 ( 1547 GS22 KS 1 60C1967 20C1967 C. 00575 1 C.C5589 ) ( 1524 1 1521 SH 1 1 20SE1967 18SE1967 0.15324 ) 0.18463 ) 1546 1522 BH 1 2DC1967 18SE1967 6.00210 ) 0.25346 ) ( 1520 ( 1523 HO PA 1 1 18SE1967 19SE1967 C. 03300 ) 1.51882 ) ( 1525 1 15JH PW SB 1 1 20SE1967 20SE1967 0.41777 1 1.15507 ) 15 26 1529 MO KW 1 1 20SE1967 20SE1567 3.36804 ) 0.07195 1 ( 1527 1 1530 TR FR 1 1 20SE1967 24SE1S67 1.50943 I C. 38004 ) ( 1531 GH 1 25SE1967 0.10144 ) 1545 UL 1 20C1967 0.21623 1 ( 1549 KC 1 40C1967 0.02741 ) 170 ( 1551 FS 1 5DC1967 0.17573 ) 1552 SH 1 60C1967 C. 61406 I 1550 KR 1 50C1967 C. 49560 ) ( 1553 ( 1351 SG HI 1 2 60C1967 21AP1967 1.17509 ) 24.32893 ) 1428 1427 MU LU 2 2 29MY1967 29MY1S67 2.02477 ) C. 18160 I 1426 1417 HO 2 2 29MY1967 22HY1967 0.19948 1 32.06221 ) ( 1418 ( 1399 SH PW 2 2 22KY1967 5KY1967 0.20218 ) 3.37323 ) 1350 1401 BH MO 2 2 19AP1967 6PY1967 3.91181 ) 10.81844 1 1425 1402 RA IR 2 2 25MY1967 6MY1967 6.36548 ) 8.92354 ) ( 1400 ( 1354 SB GH 2 2 6MY1967 25AP1967 1.23898 ) 56.72563 ) 1352 1429 KW laL 2 2 21AP1967 29MY1967 1C. 85724 ) 6.96465 ) 1353 1403 FR CA 2 2 23AP1967 10MY1967 14.17721 ) 1.4254C ) ( 1404 ( 1349 MO CI 2 2 10fY1967 1SAP1967 1.06707 ) 29.08253 ) 1405 1406 ES GB 2 2 12MY1967 13HY1967 5.67595 ) 0.00809 ) 1407 1419 SM BU 2 2 14KY1967 23MY1967 18.82127 ) C. 89711 1 ( 1420 ( 1423 IH HA 2 2 23MY1967 25PY1967 0.95166 1 9.59192 ) 1421 1424 CH 2 2 23KY1967 25MY1967 0.45108 ) 4.90274 > 1422 CA 2 23MY1967 C. 60287 ) Stephanodisous hantzsohii Grun. Stephanodisous hantzsohii Grunow in Cleve and Grunow, K. Svenska Vet.- Akad. Handl., Ny Foljd, 17(2) :115. 1880. Stephanodisous hantzsohianus Grun. in Van Heurck, Syn. Diat. Belgique, p.. 216, pi. 95, fig. 10. 1885. Cells circular in valve view and square in girdle view. Vegetative cells may occur singly or in colonies of up to 100 cells. Valves of speci- mens from Lake Michigan 8-22y in diameter with very slightly concave cen- ters. Radial striae in biseriate to quadriseriate fascicles at the valve margins, becoming uniseriate near the center of the valve. Puncta in the radial striae fine, somewhat difficult to resolve, 22-24 in lOy. Fascicles widely separated by a hyaline area that is not apparently thickened. The marginal spines occur regularly at the ends of each hyaline ray and arise from noticeably thickened bases. Placement of the spines is very regular in this taxon and they are irregular or missing only on grossly abnormal specimens. Fascicles and spines 8-11 in lOy at the margins of the valves. Our concept of this taxon is based on specimens examined by Grunow in the Van Heurck exsiccatae (Types du Synopsis no. 482). It closely re- sembles several of the other smaller species of Stephanodisous and ade- quate optical equipment, used with care, is necessary to distinguish it from these species. On the basis of our observations it is rare in the off- shore flora and only becomes abundant in harbors and eutrophied inshore areas. 643 STHANT7S TflT Nf] OF STAT tflKS 199 ( 3540 'CH 11MY1879 0.19569 1 ( 3507 CH 19FE1881 0.06792 ) (46910 CH 0C1945 C. 00109 ) (46908 146923 CH CH DE1945 22NC11946 0.01007 ) 0.01967 1 (46914 (46920 CH CH 19AP1946 200E1946 0.55524 1 0.00431 ) (46924 (46905 CH CH 10MY1946 JA1947 0.22927 1 C.CC613 ) (46909 146906 CH CH MR1947 MY1947 0.01366 ) 0.08628 1 (46912 146919 CH CH AP1947 5JN1947 0.08049 ) 0.02124 ) (46916 (469C7 CH CH 4MY1947 JL1947 C.0C577 ) C. 00394 ) (46922 (46761 CH FV 21AU1947 27MY193S 0.00485 1 0.0C273 1 (46772 ( 1224 EV B 4 18AP1938 18MY1964 0.00710 ) 0.00196 ) (46756 ( 1225 EV C D E 6 2 3 27AP1938 15MY1964 14MY1964 16KY1964 0.0C336 ) ( 1226 ( 1229 C D 7 5 16MY1964 14HY1964 0.05327 ) 0.02749 ) ( 1227 ( 123C C> E 2 2 13MY1964 16MY1964 0.00110 ) 0.07408 ) ( 1228 ( 1231 0.01752 1 C.C3669 ) ( 1232 ( 1235 E C 5 7 16HY1964 16JN1964 0.06087 1 0.03954 ) ( 1233 ( 1439 B e 3 6 5JN2964 5JN1964 0.02620 ) 0.10989 1 ( 1234 ( 1236 B C> 0 E 3 1 4 6 18JN1964 8JM964 1 UN 1964 13JM964 11JN1964 10JL1964 16JL1964 14JL1964 0.C2530 ) ( 1237 ( 1240 C D 2 6 8JN1964 10JN1964 0.04383 I 0.05829 1 ( 1238 ( 1241 D E 3 2 11JN1964 13JN1964 0. 01600 1 C. 15081 ) ( 1239 ( 1243 C. 00116 ) C.C167C ) ( 1244 ( 1440 F 8 1 6 1UN1964 11JL1964 0.03399 ) 0.01474 1 ( 1245 ( 1441 F B 2 6 11JN1964 24JL1964 0.10027 ) CO 1542 1 ( 1246 ( 1250 F C c E 3 6 2 2 0.02988 ) (. 1251 ( 1254 C D 7 2 16JL1964 15JL1964 0.00869 ) 0.01149 1 ( 1252 ( 1255 0 1 5 16JL1964 15JL1964 0.01116 ) O.C1540 ) ( 12 53 ( 1256 0.00685 ) C. 03297 J ( 1257 ( 1260 E F 3 3 14JL1964 6JL1964 0.00957 ) 0.00764 ) ( 1258 ( 1264 F C" 1 1 6JL1964 10AU1964 0.04248 ) 0.01545 ) ( 12 59 ( 1265 F C E C» 0 E 2 2 3 2 3 1 6JL1964 10AU1964 15AU1964 10SE1964 18SE1964 16SE1964 0.C1859 ) 0.OC894 I 0.00274 ) 0.01613 1 C.C1118 ) C.C1178 ) ( 1267 ( 1271 D r. 6 . 7 18AU1964 22SE1964 0.00216 ) 0.00653 ) ( 1268 ( 1272 E C> 2 1 15AU1964 lCr5"E1964 0.00821 I 0. 05336 ) ( 1269 ( 1273 ( 1276 ( 1279 ( 1274 1 1277 0 0 1 4 17SE1964 18STT964 C. 01408 ) 0.C062C ) ( 1275 ( 1278 D D 2 6 17SE1964 18SE1964 0.01290 1 0.00769 1 ( 1281 ( 1285 E F 3 1 16SE1964 15SE1964 0.00392 ) 0.01747 ) ( 1283 ( 1287 E F 5 3 16SE1964 15SE1964 C. 00613 ) 0.01501 ) ( 1284 ( 1292 E 0 6 1 17SE1964 150C1964 C. 00635 ) C. 00373 1 ( 1295 ( 1300 0 F 4 3 150C1964 13fir.l964 0.01189 ) 0.00716 1 ( 1297 ( 1301 0 E 6 4 140C1964 13CC1964 0.00571 ) 0.00442 ) ( 1298 ( 1303 ( 1307 ( 1311 E E B D 1 6 6 1 12CC1964 130C1964 NO 1964 8N01964 C.CC269 ) C. 01119 ) 0.CC361 ) ( 1304 ( 130R F r. 1 7 110C1964 6NC11964 C.CC247 ) 0.00917 I ( 1306 ( 1309 F 3 1 110C1964 10N01964 0.00277 ) 0.00643 ) ( 1312 ( 1317 D F 2 1 8N01964 6Nnl964 0.CC310 ) 0.00383 ) ( 1313 ( 1316 D E 3 2 9N01964 7N01964 0.CO193 ) 0.00190 1 ( 1315 ( 1319 0 E 5 3 9N01964 7N01964 0.00910 ) C.0C262 ) ( 1320 * 1336 E r. 4 3 7N01964 77.IA1967 0.00207 ) '0.00193 ) ( 1323 ( 1337 F C 1 3 6N01964 2MR1967 0.00139 ) 0.00147 I ( 1325 ( 1338 F C 3 3 6N01964 28MR1967, 0.00252 ) C.C1190 ) ( 1339 I 1347 C A C A 5 4 7 6 28MR1967 19AP1967 21AP1967 3MY1967 0.04365 ) 0.01624 I ( 1340 ( 1343 c A 7 6 28PR1967 19AP1967 0.81443 ) C. 35710 1 ( 1341 ( 1344 A C 3 3 19AP1967 25AP1967 C. 15187 ) 0. 00165 ) ( 1346 ( 1370 0.07878 1 0.13580 ) ( 1347 ( 1371 E C 2 3 23AP1967 0.00976 I ( 1348 E E A E 5 2 6 3 23AP1967 7MY1967 24HY1967 26MY1967 C. 14805 ) 0.02092 ) C. 00564 1 C.CC450 ) ( 1376 ( 1411 E r, 5 3 6MY1967 31MY19A7 0.11525 ) 0.01231 ) 1 1408 ( 1412 A C 3 5 23HY1967 31HY1967 0.01342 1 0.00421 I ( 1410 ( 1415 ( 1416 1 1433 E _.. C 5 3 28KY1967 17JN1967 0.C7654 ) 0.00646 ) ( 1431 1 1434 A r. 3 5 12JN1967 17.IM967 0.00772 1 0.00299 1 ( 1432 ( 1435 A C 4 7 13JN1967 13JN1967 C. 00511 ) C.C1263 1 171 ( ( 1438 1454 E 5 F. 5 14JN1967 15JL1967 0.01452 ) 0.00200 ) 1451 1504 C A 7 3 16JL1967 28AU1967 0. 05512 ) 0.00741 ) ( 1452 ( 1506 E A 2 6 14JL1967 29AU1967 C.0C852 ) C.0C523 ) ( ( 1532 1541 A 3 F 2 18SE1967 110C1967 0.00329 ) C. 00532 1 1537 1543 E E 3 5 24SE1967 100C1967 0.00431 ) 0.00718 ) ( 1540 ( 1378 C es 5 2 40C1967 9MY1967 C. 00496 1 C.CC421 | ( I 1379 1381 GS 3 GS 7 9MY1967 10MY1967 0.00309 ) 0.00267 ) 1380 1384 GS GS 4 8 9MY1967 10MY1967 0.01177 ) 0.00555 ) ( 1381 ( 1385 GS GS 5 9 10MY1967 10WY1967 0.01431 ) C.0C706 ) ( 1 1387 1395 GS11 GS19 12MY1967 13MY1967 0.00396 ) 0.00705 ) 1389 1396 GS13 GS20 12MY1967 13MY1967 0.00258 ) 0.00296 I ( 1392 ( 1397 GS16 GS21 12MY1967 13MY1967 0.00308 1 C.0C196 ) ( ( 1554 15A5 GS 1 KS13 30X1967 50C1967 0.00356 1 0.01014 ) 1555 1566 GS 2 GS14 30C1967 50C196 7 0.00353 ) 0.00734 ) ( 1563 t 1567 GS11 GS15 50C1967 50C1967 C.C0234 1 C. 00476 ) ( I 1568 1571 GS16 GS19 50C1967 6flC1967 0.00289 1 0.00117 I 1569 1572 GS17 GS20 50C1967 60C196 7 C. 00297 I 0.00631 ) ( 1570 t 1573 GS18 GS21 50C1967 60C1967 C.0C992 ) C. 00560 ) ( ( 1574 I54A GS22 111 1 60C1967 2nd 967 0.00288 I 0.02501 1 1575 1520 GS28 HO 1 60C1967 18SE1967 0.00387 ) 0.04243 I ( 1544 ( 1521 MU SH 1 1 20C1967 18SE1967 C.C2383 I C. 03462 ) ( 1522 1557 BH 1 TR 1 18SE1967 20SF1967 0.21334 ) 0.00629 ) 1523 1531 RA GH 1 1 19SE1967 25SE1967 0.00923 ) 0.00845 ) ( 1526 ( 1545 MO 1 I 20SE1967 20C1967 C. 00569 ) 0.23650 ) 1 ( 1548 1*R* CA 1 sr. i 30C1967 ^nri9A7 0.01272 ) n.ni4fto i 1549 1 I47R MO Mil 1 40C1967 PQMY1967 0.01370 I (1-4A209 1 1 1550 1 1426 MR US 1 2 50C1967 29MY1567 C. 07434 1 C. 18898 1 ( ( 1351 1418 MI 2 SH 2 21AP1967 22MY1967 0.01241 ) 0.13997 ) 1 1427 1350 LU BH 2 2 29MY1967 19AP1967 0.03632 ) 1.05725 ) ( 1417 ( 1425 HO RA 2 2 22MY1967 25MY1967 4.48632 ) C.0C884 ) ( ( 1399 135? PW 2 KW ? 5MY1967 21AP1967 0.00680 ! 0.03436 I 1402 L353 TR FB 2 2 6MY1967 23AP1967 C. 11912 ) 0.04219 ) ( 1400 I 1354 SB GH 2 2 6MY1967 25AP1967 10MY1967 ISAP1967 C. 25614 ) 1.49133 I ( ( 1429 1405 WL 2 FS 2 29KY1967 17MY1967 3.22752 1 0.01935 1 ( 1403 1407 CA SM 2 ? 10MY1967 14MY1967 C. 03923 ) 0.04180 ) ( 1404 I 1349 MO CI 2 2 0.01270 1 C. 05748 ) ( I 1406 _JA24___ GB 2 13MY1967 75MY1967 0.16983 ) 0.03997 1 1422 GA 2 23MY1967 C. 02044 1 ( 1423 UA 2 25HY1967 C. 07708 1 Stephanodiseus minutus Grun. ex Cleve and Moll. Cyelotella minutula Kutz., Bacill., p. 50, pi. 2, fig. 3. 1844. Stephanodiseus minutus Grunow ex Cleve and Moller, Diatoms, #221. 1879. Stephanodisous astraea var. minutula Grun. in V. H., Syn. Diat. Belgique, pi. 95, figs. 7, 8. 1882. Stephanodiseus balatonis Pant., Res. Wiss. erforsch. Balatonsees, p. 105, pi. 15, fig. 324. 1902. Cells circular in valve view and rectangular in girdle view. Vegeta- tive cells always occur singly. Valves of specimens from Lake Michigan 4-22u in diameter with strongly concave centers. Radial striae in biseriate fascicles at the valve margins, becoming disorganized near the center of the valve. Puncta in the radial striae fine, more than 30 in lOu. Fascicles are separated by narrow but obviously thickened radial ribs. The marginal spines arise at the ends of each of these ribs. Placement of the spines is very regular in this species and they are irregular or missing only in grossly abnormal specimens. Fascicles and spines 15-18 in lOp at the margins of the valves . Our concept of this taxon is based upon the material on Cleve and Moller slide #221. Most recent workers have considered this entity to be a variety of S. astraea. The reason for this is difficult to discern as this species has only a superficial resemblence to S. astraea. Its morphology is some- what similar to that of S. transilvanieus but it differs from that taxon by its finer structure and in that the radial striae are always in fascicles of two. Although S. astraea var. minutula has been widely reported, the confusion surrounding this name makes it difficult to determine the actual distribution of the taxon we treat here. In our experience in Lake Michigan it is a minor component of the offshore flora and only becomes abundant in estuaries and eutrophied inshore areas of the lake. 172 64C ST&STP.VP TfT NC GF STATICNS 257 (60973_. (46917 ( 1237 ( 1240 ( 1243 _l_U4ji_ C 2 D 6 12JA1946 0.00055 ) ("H ??Nmq46 n.l(19?8 1 I4f <;?n r.H ?nnF1946 0.(13353 1 (469C5 CH JA1947 C.01103 1 (46909 (46906 CH CH MR 1947 MY1947 0.00911 1 1.55304 ) (46912 (46?19 CH CH AP1947 5JN1947 C. 08049 ) 1.38086 1 (46916 (469C7 CH CH 4MY1947 JL1947 0.24259 1 C. 73720 1 (46913 (46743 CH FV 6AU1947 20JN1937 0.02092 ) 0.21838 ) (46922 (46764 CH EV 21AU1947 17JL1937 0. 10463 ) 0.02417 1 (46758 (46757 EV EV 54N1937 25JL1937 C. 19970 1 C. 01926 ) (46747 (46768 EV EV' 1AU1937 16KR1938 0.OC248 ) 0.01470 ) (46765 (46751 EV EV 30AU1937 30MR1S38 0.00558 I C. 07816 ) (46744 (46772 EV EV 60C1937 18AP1938 C. 01463 ) 0.01419 ) (46756 (46766 EV EV 27AP1938 14CE1938 0.18806 ) 0.01584 ) (46759 ( 1223 EV B 3 19MY1938 18MYIS64 0.02701 1 0.00469 ) (46761 ( 1224 EV B 4 27MY1938 18MY1964 C. 06813 ) C.0C588 ) ( 1225 ( 1278 C D 6 ? 15MY1964 14MY1964 0.01176 ) 0.00973 I ( 1226 ( 1229 C 0 7 5 16MY1964 14MY1964 0.01142 1 0.19243 ) ( 1227 ( 1230 C E 2 2 13MY1964 16MY1964 C. 00219 ) C. 14224 ) ( 1231 ( 1234 E B 3 3 16MY1964 18JN1964 0.85608 ) 0.02530 ) ( 1232 ( 1439 E 8 5 6 16MY1964 5JN1964 0.65046 ) 0.15385 ) ( 1233 ( 1236 B C 3 1 5JN2964 8JN1964 0.01191 ) 0.00875 ) 8JN1964 10JN1964 C.C5672 ) 0.01381 I ( 1238 ( 1241 D 3 E 2 1UN1964 13JM964 0.08200 ) 0.3459B ) ( 1239 ( 1242 0 4 E 3 11JM964 13JM964 C.CC116 ) C. 52453 ) ( 1250 < 1253 ( 1256 ( 1259 ( 1262 _1_1Z&1&_ E 6 F 3 C 6 C 2 E 2 F 2 B 3 13JM964 11JN1S64 0.03550 ) 0.19124 I ( 1244 ( 1440 F 1 B 6 11JN1964 11JL1964 0.01864 ) 0.06633 1 ( 1245 ( 1441 F 2 B 6 11JM964 24JL1964 10JL1964 16JL1964 0.02467 I 0.CC913 ) ( 1251 ( 1254 C 7 D 2 16JL1964 15JL1964 0.00579 ) 0.08044 ) ( 1252 ( 1255 C" 1 0 5 14JL1964 6JL1964 0.08976 ) 0.01549 ) ( 1257 ( 1260 16JL1564 15JL1964 E 3 F 3 14JL1964 6JU1964 C. 72735 I 0.0152B ) ( 1258 1 1261 F 1 B 3 6JU964 2AU1964 17A01964 18AU1964 0.C0210 I 0.00702 1 ( 1264 ( 1267 C 1 0 6 10AU1964 18AU1964 C.C2510 ) 0.00216 ) ( 1265 ( 1268 C 2 E 2 10AU1964 15AU1964 C.C6915 1 C.CC881 ) C. 02232 ) C. 04363 ) C. 02124 ) 0.00196 ) 0.CC671 ) C. 19149 1 ( 1338 LJ.24X_ ( 1344 ( 1369 ( 1377 C 3 _A_-3_ C 3 __E_j2_ A 4 C 5 { 1269 ( 1272 E 3 1 15AU1964 10SE1964 0.34534 ) 0.00410 ) ( 1270 ( 1273 F C 1 2 10AU1964 10SE1964 0.00272 ) 0.00538 ) ( 1271 ( 1274 C D 7 1 22SE1964 17SE1964 0.00653 1 C.0C469 ) ( 1279 . _LL283_. . E F 1 5 16SE1964 16SE1964 0.0C785 ) 0.01226 ) ( 1280 ( 1285 E F 2 1 16SE1964 15SE1964 0.01362 1 C. 01165 ) ( 1282 ( 1286 E F 4 2 16SE1964 15SE1964 C. 01108 ) C.C2189 ) ( 1288 ( 1292 B D D F 3 1 5 150C1964 150C1964 140C1964 12GC1964 0.00218 ) 0.00373 1 ( 1445 ( 1293 B D 6 2 14CC1964 15QC1964 0.00652 ) 0.00472 ) ( 1289 ( 1294 C 0 7 3 140C1964 15CC1964 0.CC44C ) C. 00330 ) ( 1296 ( 1299 0.C0787 I 0.01571 ) ( 1297 ( 1300 0 E 6 3 14CC1964 130C1964 0.00381 ) 0.02864 ) ( 1298 ( 1301 E E 1 4 12CC1964 13CC1964 C.CC808 ) C. 01325 » ( 1305 ( 1310 F 2 JL. 110C1964 1CNG1964 0.00173 ) C.0C227 ) ( 1307 ( 1311 B C 6 1 N01964 8N01964 0.00361 ) 0.00516 1 ( 1309 ( 1312 C- D 1 2 10N01964 8N01964 C. 00161 ) C.CC621 ) ( 1313 1 1318 D F 3 2 9N01964 7N01964 0.00193 ) C. 00380 1 ( 1315 ( 1319 D F 5 9N01964 7N01964 • 0.00455 ) C. 00524 ) ( 1317 ( 1320 E F 1 4 6NC1964 7N01964 0.00383 ) C.C1034 I ( 1321 1 1324 E F 5 2 7N01964 6N01964 0.00319 ) C.0C699 ) ( 1322 I 1336 E C 6 3 7N01964 27JA1967 C. 00667 ) C. 00770 1 ( 1323 1 1337 F C 1 3 6N01964 2MR1967 C.0C418 ) C. 41153 ) 28MR1967 _19A£196JL 25AP1967 23AP1967 1.38837 ) 0.35364 ) 0.09761 ) 1.13812 ) ( 1339 _< >3A2„ ( 1345 ( 1348 C 5 _i_4._ 28MR1967 _J9AP_1967_ 1.52772 ) 1.26324 ) ( 1340 ( 1343 C 7 A 6 28MR1967 19AP1967 C 5 E 5 25AP1967 23AP1967 4.63910 ) 3.93420 ) 4MY1567 5MY1967 ( 1346 ( 1368 0.15282 ) 0.22698 ) ( 1370 ( 1373 A 6 C 7 3MY1967 5HY1967 C 7 21AP1967 4MY1967 0.06215 ) C. 01141 ) ( 1371 ( 1374 C 3 E 2 4MY1967 7MY1967 1.27255 ) C. 63221 ) C. 31245 ) C.C5655 ) C. 03232 I 2.71966 ) ( 1375 .J_L4Q9_ E 3 7MY1967 23HY1967 0.24543 ) 0.00298 ) ( 1376 ( 1410 E 5 A 6 6MY1967 24MY1567 C. 25298 ) C. 02255 I ( 1408 ( 1411 A 3 C 3 23MY1967 31MY1967 C. 01789 ) C.C0410 ) ( 1412 .1.141 5_ C 5 „.E._.3L. ( 1432 ( 1435 A 4 C 7 ( 1438 I i449_ E 5 _C_J_ ( 1452 ( 1508 ( 1532 ( 1535 E 2 _C_.3_ 31KY1967 _28.iLY_196.7_ 13JN1 .67 13.IN1967 0.01684 ) 0.01799 ) 0.01788 ) 0.00631 ) ( 1413 _(_1416__ ( 143 3 ( 1436 C 7 E 5 25MY1967 28MY1967 0.00632 ) C. 15303 I ( 1414 ( 1431 E 2 A 3 28MY1967 12JN1967 C 3 E 2 17JN1967 15JN1967 0.24545 I 0,01447 ) < 1434 ( 1437 C 5 E 3 14JN1967 _____L___67_ 14JL1967 2SE1567 0.03268 ) 1.33746 ) ( 1446 ( 1450 A 3 C 5 11JL1967 16JL1967 0.07827 ) 0.33324 ) ( 1447 ( 1451 17JN1967 15JN1967 A 4 C 7 0.69400 ) 0.0C799 1 ( 1453 I 1511 E 3 E 2 15JL1967 1SE1967 0.97313 1 C. 42975 ) ( 1454 I 1512 11JL1967 16JU967 E 5 E 3 15JL1967 1SE1967 c.oiooe > C. 01030 ) C.C1794 ) C.C0538 ) C. 03509 ) C. 01772 ) C.C1600 ) C. 36909 ) A 3 f. 7 18SE1967 20SE1967 0.01314 ) 0.00322 ) ( 1533 ( 1536 A 4 E 2 19SE1967 24SE1967 0.0O464 I 0.12543 ) ( 1534 ( 1537 A 6 E 3 19SE1967 24SE1967 C.0C931 ) C. 02588 ) ( ( 1538 1541 E 5 E 7 23SE1967 110C1967 0.09391 1 0.39381 ) ( 1539 ( 1542 C 3 E 3 40C1567 110C1967 C. 03019 ) 0.10679 ) ( 1540 ( 1543 C 5 E 5 40C1967 100C1967 0.0C993 ) C. 06465 ) ( ( 1379 Jl_U_2 1385 GS 3 GS 6 9MY1967 10MY1967 0.01857 ) 0.01943 1 ( 1380 ( 1383 GS 4 GS 7 9MY1967 10MY1967 0.04708 ) C. 15772 ) ( 1381 ( 1384 GS 5 GS 8 10MY1967 10MY1967 C. 04055 ) C. 36972 ) ( SS 9 10MY1967 0.00471 1 ( 1386 GS10 12MY1967 0.04309 ) ( 1387 CS11 12HY1967 C. 34854 ) 1 139(1 K .14 1. MY19A7 0.01174 1 ( 139? GS16 12MY1967 0.00616 1 ( 1393 CS17 ( 1394 ( 1397 GS18 GS21 13MY1967 13MY1967 0.04988 I 0.07064 ) ( 1395 I 1398 GS19 GS22 13MY1967 14MY1967 0.01527 ) 0. 01214 ) ( 1396 ( 1554 GS20 CS 1 ( 1555 ( 1558 GS 2 GS 5 30C1967 40C1967 0.0 2472 ) 0.01189 ) ( 1556 ( 1559 GS 3 GS 7 30C1967 40C1967 0.03650 1 0.00350 ) ( 1557 ( 1560 GS 4 CS 8 ( 1561 ( 1568 ( 1571 ____!______ ( 1547 _L_i___2__ [ 1527 ( 1530 GS 9 GS16 GS19 _GJL22_ MS 1 BH 1 TR 1 ER 1 40C1967 50C1967 0.01761 ) 0.00144 ) ( 1562 t 1569 GS10 GS17 50C1967 50C1967 0.00740 ) C. 00446 1 60C1967 60C196 7 20C1967 18SE1967 0.00351 1 0.01151 ) ( 1572 < 1575 GS20 CS28 ( 1563 ( 1570 60C1967 6CC1967 0.00798 ) 0.OC729 ) 20SE1967 24SE1967 ( 1546 [ 1523 LU 1 RA 1 20C1967 19SE1967 0.00631 ) 0.00387 ) ( 1573 ( 1544 0.15723 ) 0.02000 ) ( 1528 ( 1531 se i GH 1 20SE1967 25SE1967 C. 42015 ) 0.04613 ) ( 1521 ( 1526 0.01444 ) 0.01691 ) ( 15 29 ( 1545 GS11 GS18 CS21 . U 1 SH 1 MO 1 KW 1 WL 1 13MV1967 0.00822 I 13MY1967 3GC1967 30C1967 40C1967 50C1967 50C1967 6GC1967 20C1967 18SE1967 20SE1967 20SE1967 20C1967 C. 02886 ) C. 08895 ) C. 01495 ) C.C1889 ) C. 00234 ) 0.00992 ) C. 10527 ) 0.17633 1 C. 11539 ) C. 19912 ) 0.26382 ) 1.08115 ) C. 03301 ) C. 03013 ) ( 1548 ( 1550 I 1426 < 1417 ( 1399 ( 1400 ( 1354 ( 1404 ( 1349 _.___L4____ CA 1 MR 1 MS 2 HO 2 PW 2 SB 2 GH 2 MO 2 CI 2 _______ 30C1967 50X1967 0.01272 ) 0.73101 ) ( 1551 < 1553 29MY1967 22MY1967 0.07349 ) 2.27307 ) ES 1 SG 1 50C1967 60C1967 0.12781 ) 0.41863 ) ( 1351 ( 1350 5MY1967 6MY1967 MI 2 BH 2 21AP1967 19AP1967 ( 1552 ( 1428 SM 1 MU 2 2.53220 ) 1.33918 ) 0.25843 ) 0.55397 1 ( 1401 ( 1352 MO 2 KW 2 25AP1967 10MY1967 1.27C39 I 0.06352 ) ( 1429 ( 1405 19AP1967 23MY1967 0.57475 ) 0.09063 ) UL 2 ES 2 6MY1967 21AP1967 29MY1967 12MY1967 1 14 27 ( 1425 LU 2 FA 2 0.54680 ) 2.19893 I ( 1402 ( 1353 ( 14C6 ( 1421 GB 2 CH 2 C. 16987 ) C. 04515 ) TR 2 FR 2 ( 1403 ( 1407 CA 2 SM 2 13MY1967 23MY1967 0.04313 ) 0.10409 ) ( 1419 (1422 eu 2 GA 2 60C1967 29MY1967 29MY1967 25MY196 7 6MY1967 23AP1967 10MY1967 14MY1967 23MY1967 23MY1967 C.3C266 ) C. 18566 ) 0.95300 ) C. 44304 ) 2.09232 ) C. 09554 ) C.1C985 ) 0.05620 ) Stephanodisous niagavae Ehr. Stephanodisous niagavae Ehrenberg, Ber. Akad. Wiss. Berlin 1845:80. 1845. Cells circular in valve view and rectangular in girdle view. Vegeta- tive cells always occur singly. Valves of specimens from Lake Michigan 42- 94u in diameter with slightly concave centers. Radial striae in biseriate 173 fascicles near the valve margins, becoming uniseriate near the centers. Puncta in the radial striae coarse, 12-16 in lOy. Fascicles closely packed with only small hyaline spaces between them. The coarse spines of this species are sub-marginal and irregularly arranged, usually between each 2-4 fascicles. Fascicles 5-8 in lOu at the valve margin. In this taxon a promi- nent marginal area of fine, irregularly arranged puncta is present. The spines arise from the inner margin of this zone and it is separated from the fascicles by an unornamented space. This species much resembles S. astvaea (Ehr.) Grun. and a good deal of speculation has been put forth in the literature regarding the relationship between the two taxa and about their distributions. Our concept of S. niagarae is based upon specimens attributed to Bailey in the Academy of Natural Sciences of Philadelphia (ANSP 42768) which are believed to be de- rived from the original material from Niagara Falls from which this taxon was described. 642 STNIAGVM TOT NO OF STATIONS 222 (60973 (46910 CH CH 1876 0C1945 0.18895 ) 0.00437 ) ( 354C 146921 CH 11MY1875 23N01945 0.01864 1 C. 00776 I ( 3541 CH CH CH CH 1FE1881 12JA1946 22NC1946 MR1947 1.29121 ) 0.00166 ) 0.C3497 ) 0.01366 ) (46914 (46920 CH CH CH CH 19AP1946 20DE1946 0.03630 I 0.00585 I (46924 (465C5 CH CH 10MY1946 JA1947 0. 06067 ) 0.00613 ) (46923 (469C9 (46912 (46919 AP1947 5JN1947 0.04599 ) 0.00607 ) (46516 (465C7 CH CH 4MY1947 JL1947 C. 02443 ) 0.03205 ) (469C6 (46922 (46743 (46764 CH CH EV EV EV EV MY1947 21AU1547 20JN1937 17JL1537 23AU1937 15SE1937 0.C3982 ) (46758 (46745 EV EV 5JN1937 3JL1937 0.05706 1 0.08359 1 (46771 (46770 EV EV 11JN1937 9JL1937 0.03804 ) 0.11331 ) C. 11989 I (46757 (46165 EV EV 25JL1937 30AU1937 0.06259 1 0.03904 1 (46747 (46765 EV EV 1AU1937 7SE1937 0.06436 ) 0.04342 ) (46763 (46752 C. 06088 I (46760 (46748 EV FV 22SE1537 130C1937 0.07386 I 0.10675 1 (46750 (46767 EV EV 24SE1937 270C1937 0.01885 ) 0.00387 ) (46744 (46749 EV EV EV EV 60C1937 12HR1938 30MR1938 19HV1938 C.0C488 ) (46768 (4677? EV EV EV C 6 16MR1938 18AP1938 0.02940 1 0.06388 1 (46762 (46756 EV EV 18HR1938 27AP1938 0.11028 ) 0.05541 ) (46751 (46759 C. 03350 ) C. 31735 ) (46761 ( 1225 27HY1938 15MY1964 0.10902 1 0.00392 I (46766 ( 1226 EV C 7 140E1938 16HY1964 0.01584 I C. 01903 1 ( 1224 ( 1227 B C" 4 2 18HY1964 13HY1964 C. 00784 ) ( 1228 ■ 1731 D F 2 3 14MY1964 l*MY1564 0.01752 ) n.ni.i-iH i ( 1229 1 l?W 0 F 5 5 14MY1964 16MY1964 0.00634 ) 0.01217 1 ( 1230 ( 1234 E B 2 3 16HY1564 18JN1964 C. 02074 1 C.C2817 ) ( 1236 ( 1241 c F 1 2 8JN1964 13JN1964 0.01225 ) 0.00739 ) ( 1237 ( 1242 c E 2 3 8JN1964 13JN1964 0.01547 1 0.C0599 ) ( 1238 ( 1243 0 E 3 6 11JN1964 13JN1964 O.CC600 ) C. 01044 1 ( 1244 ( 1247 F B 1 3 11JN1964 14JL1964 0.00110 1 0.00427 ) ( 1245 ( 1255 F 0 2 5 1UN1964 15JL1964 C. 00692 ) 0.00770 ) ( 1246 ( 1256 F E 3 2 1UN1964 14JL1964 C.0C598 ) C.0C366 ) 1 1257 ( 1260 E F 3 3 14JL1964 6JL1964 0.00718 ) 0.00382 ) ( 1258 ( 1262 F B 1 3 6JL1964 17AU1964 0.00472 ) 0.00210 ) I 1259 ( 1264 F C 2 1 6JL1564 10AU1964 C.CC310 ) C.CC386 ) ( 1266 ( 1285 D F 3 1 18AU1964 15SE1964 0.00351 ) 0.01165 ) ( 1278 ( 1288 D B 6 3 18SE1964 150C1964 0.00384 ) 0.00218 ) ( 1284 ( 1301 E E 6 4 17SE1964 130C1964 C.CC318 ) C. 00883 ) ( 1302 ( 1318 E E 5 ? 13CC1964 7 NO 1964 0.01620 ) 0.00190 ) ( 1304 < 132C F E 1 4 110C1964 7N01564 0.00494 I 0.00207 ) ( 1305 ( 1321 F E 2 5 110C1964 7N01964 C.0C345 ) C.0C638 ) ( 1323 I 1317 F r. 1 3 6N01964 2MR1567 0. 00557 ) 0.00294 1 ( 1324 ( 1338 F C 2 3 6NC1964 28MR1967 0.00699 1 0.02248 ) ( 1336 < 1339 C C 3 5 27JA1567 28MR1967 0.00385 ) C. 17148 ) ( 1340 ( 1343 c _A_ 7 6 28MR1967 19AP1967 0.01018 ) 0.00347 ) ( 1341 ( 1344 A C 3 19AP1967 25AP1967 0.01953 I 0.01324 ) ( 1342 ( 1345 A C 4 5 19AP1967 25AP1967 C. 03248 ) C. 15009 ) ( 1346 ( 136 8 c A 7 3 21AP1967 4MY1967 0.0186S 1 0.15708 ) ( 1347 ( 1369 E A 2 4 23AP1967 4MY1967 C. 04065 ) 0.32800 ) ( 1348 ( 1370 E A 5 6 23AP1967 3MY1967 C.C1919 ) C. 00691 ) ( 1371 ( 1374 C E 3 ? 4MY1967 7MY1967 O.08O80 ) 0.18828 ) ( 1372 ( 1375 C E 5 3 5MY1967 7MY1967 0.64548 ) 0.12512 ) ( 1373 ( 1376 C E 7 5 5KY1567 6MY1967 C. 15118 ) C.C1968 1 ( 1408 LJAJ_L A C 3 3 23MY1967 31MY1967 0.16992 ) 0.08206 ) ( 1409 ( 1412 A C 4 5 23HY1967 31MY1967 0.05356 ) 0.51772 ) ( 1410 ( 1413 A C 6 7 24MY1967 25MY1967 28MY1967 17JN1967 C. 01691 ) C.C5370 ) ( 1414 ( 1431 E A' 2 _3_ 28MY1967 12JN1567 0.06045 ) 0.01287 > ( 1415 ( M32_ E A 2 4 28KY1567 13JN1967 0.07870 ) C. 16093 ) ( 1416 1 1433 E C 5 3 0. 06123 ) C. 02584 ) ( 1434 1 1437 C F 5 3 17JN1967 15.IN1967 0.57722 1 0.13458 1 ( 1435 < 1438 C E 7 5 13JN1967 14JN1967 0.01579 1 0.07262 1 ( 1436 ( 1449 E c 2 3 15JN1967 16JL1967 C. 16092 ) C. 24456 ) ( 1450 1 1504 c . A 5 3 16JL1967 28AU1967 C. 08569 ) 0.00247 I ( 1452 ( 1509 E C 2 5 14JL1967 2SE1967 0.00639 ) C. 01009 ) ( 1453 ( 1510 E C 3 7 15JL1967 29AU1967 C.C8847 ) 0.0C316 I ( 1511 1 1537 E F 2 3 1SE1967 24SF1967 0.00921 1 0.06469 1 ( 1512 ( 1538 E E 3 3 1SE1967 23SE1967 0.01963 ) 0.01105 ) ( 1532 ( 1542 A E 3 3 18SE1967 110C1967 C. 00329 ) C. 02034 ) ( 1377 1 13S0 GS 1 4 5HY1967 9MY1967 0.05541 1 0. 04540 1 t 1378 ( 1381 GS GS 2 5 9HY1967 10KY1967 0.03364 1 0.02385 ) ( 1379 ( 1382 GS GS 3 6 9MY1967 10MY1967 C. 13308 ) C. 03886 ) 1 1383 1 13R6 GS 7 GS10 10MY1967 12MY1967 0.07485 ) 0.16087 I ( 1384 ( 1387 GS 8 GS11 10MY1967 12KY1967 0.25880 ) 0.25349 I ( 1385 ( 1388 GS 9 GS12 10MY1967 12HY1967 C.C2119 ) 0.84465 ) ( 1389 L 1392 GS13 GS1A 12MY1967 12HY1967 0.18049 ) _0_»Ja65S_JL._ ( 1390 . _L 1392 GS14 . -£SJL7_ 12MY1967 13KY1967 0.32883 I 0.46844 ) ( 1391 ( 1394 GS15 GS18 12HY1967 13MY1967 C. 83800 ) C. 96325 1 ( 1355 GS19 13MY1S67 14MY1967 0.69873 ) 0.04251 1 1 1356 I 1554 GS20 GS 1 13MY1967 3GC1967 0.49203 1 0.01423 ) ( 1397 ( 1555 GS21 GS 2 13HY1967 30C1967 C. 77832 I C.0C353 1 ( 1556 GS 3 BSH GS14 GSJLL - GS20 GS28 30C1967 snr.1967 50C1967 50C1967 60C1967 MIT.! 967 0.01043 ) _fl.D163_T J ( 1559 ( 1564 GS 7 GS12 40C1967 50C1967 C. 01049 ) 0.01152 ) ( 1560 ( 1565 GS 8 GS13 40C1967 50C1967 C.CC945 ) C. 01014 ) ( 1566 L 1569 ( 1572 1 1575 0.01835 ) 1.76891 1 0.31545 ) 2.70940 1 ( 1567 ! 157C ( 1573 1 1544 GS15 GS18 GS21 MU 1 50C1967 50C1967 60C1967 20C1967 C. 55570 ) 0.87267 1 0.36509 1 C. 24067 1 ( 1568 ( 1571 ( 1574 ( 1547 GS16 GS19 GS22 *S 1 50C1967 60C1967 60C1567 20C196 7 C. 11255 1 C. 28684 I C. 22436 ) C.CC798 I ( 1546 LU RH 1 2CC1567 18SF1967 0.02501 ) _0j0J)365_J I 1520 1_152_6 HO HO 1 1 18SE1567 20SE1967 0. 09901 ) 0.01138 ) ( 1521 ( 1527 SH TR 1 1 18SE1967 20SE1967 C.CC577 ) C. 01887 1 ( 1528 SB Ma MR IK 1 1 1 7 20SE1S67 AOC.1S6.Z. 5CC1967 ?q*Y1967 0.02388 ) __SU02J41_JL_ 1.32573 ) 0.07349 1 ( 1531 I 1551 GH ES 1 1 25SE1967 50C1967 0.0O845 1 0.11183 ) ( 1545 ( 1552 SM 1 20C1967 60C1967 C. 04054 ) 1.16210 ) ( 1550 ( 1553 I 1351 SG MI 1 2 60C1967 21AP1567 2.70270 1 0.01241 1 ( 1428 ( 1427 LU 2 2 29MY1967 29MY1967 C. 67492 ) 0.25424 ) ( 1417 ( 1425 HO 2 7. 22MY1967 _Z5_MY196_7 0.10468 I 0.02652 ) ( 1418 ( 1399 SH Pt> 2 2 22MY1967 5HY1967 0.01555 ) 0.04761 1 ( 1350 ( 14C1 8H 2 2 19AP1967 6KY1967 C. 02643 ) C. 02352 ) 174 ( 1402 i 1353. TR 2 FR 2 6KY1967 23AP1967 0.U3f90 1 0.01055 ) 1400 1354 SB 2 GH 2 6MY1967 25AP1967 0.02978 ) C. 10874 ) 1352 1429 KW 2 hi. 2 21AP1967 29HY1967 C. 02577 ) C. 44591 ) ( 1403 ( 1407 CA 2 SM 7 10MY1967 14MY1967 0.15692 ) 1.52863 ) 1404 1349 MC 2 CI 2 10MY1967 19AP1967 C. 19055 ) 0. 00718 ) 1405 14C6 ES 2 CB 2 12MY1967 I3MY1967 C. 59985 ) C. 86265 ) < 1419 I 1422 BU 2 GA 2 23MY1967 23MY1967 0.01831 ) 0.01022 ) 1420 1423 IH 2 HA 2 23MY1967 25HY1967 0.01511 ) 0.01285 ) 1421 1424 CH 2 KN 2 23MY1967 25KY1967 C. 01735 1 C.C6661 ) Stephanodiseus niagarae var. magnified Fricke Stephanodiseus niagavae var. magnifioa Fricke, A. Schmidt's Atlas Mat., pi. 227, figs. 10-13. 1901. Differs from the nominate variety in its more robust structure. The puncta in the fascicles are closely packed and appear hexagonal in surface focus and circular in deep focus. Valves of Lake Michigan specimens are from 42-106y in diameter. Puncta in the radial striae 10-12 in lOy. Fascicles 4-5 in lOu, becoming indistinct near the marginal zone due to irregular place- ment. The submarginal spines are very long and coarse and tend to be somewhat more regular in their placement than in the nominate variety. In the larger specimens a second circlet of smaller spines is found on the valve surface, surrounding the sunken central portion of the valve. This entity reaches its greatest abundance in eutrophic, hardwater lakes in western North America. Its occurrence in Lake Michigan is limited to eutrophied inshore areas and estuaries. 641 STN1AGAR ICT NO OF STATIONS 27 160973 (4676C CH FV 1876 22SE1937 0.23618 ) 0.00492 ) 46916 1223 CH B 3 4MY1947 18MY1964 C. 00068 ) 0.00156 ) 46763 1224 EV B 4 23AU1937 18MY1964 C. 02029 ) C.CC196 ) ( 1238 0 3 A 4 1 UN 1964 4MY1967 O.CC600 ) 0.00745 ) 1268 1370 E 2 A 6 15AU1964 3MY1967 0.00274 ) 0.00230 ) 1322 1372 E 6 C 5 7N01964 5MY1967 0.00333 ) C. 00709 ) ( 1408 A 3 GS 6 23MY1967 10MY1967 0.0C894 ) 0.00278 1 1416 1391 E 5 GS15 28MY1967 12MY1967 0.00875 ) 0.02394 ) 1377 1392 GS 1 GS16 9HY1967 12HY1967 C.0C396 ) C. 02157 ) ( 1396 1 1529 GS20 KM 1 13MY1967 20SE1967 0.00518 ) 0.01199 ) 1544 1531 MU 1 GH 1 2CC1967 25SE1967 0.01191 ) 0.00845 ) 1520 1428 HO 1 ► U 2 18SE>1967 29HY1967 C.C3300 ) C.0C301 ) ( 1417 HO 2 22HY1967 0.00374 ) 1350 BH 2 19AP1967 0.00441 ) 14C6 GB 2 13HY1967 0.22645 ) Stephanodiseus subtilis (Van Goor) A. Cleve Melosiva subtilis Van Goor, Recueil Trav. Bot. Neerlandis, 21:359, fig. 8. 1924. Stephanodiseus subtilis (Van Goor) A. Cleve-Euler, K. Svenska Vet.-Akad. Handl., Fjarde Serien, 2(1) :54, fig. 72. 1951., Cells circular in valve view and rectangular,, elongate in the pervalvar axis, in girdle view. Vegetative cells always occur in filamentous colonies, joined at the valve surfaces. Cell walls are very lightly silicified, and the frustules are often deformed in prepared collections. Valves of speci- mens from Lake Michigan 6-22u in diameter, only slightly concave at the cen- ter. The radial striae are contained in biseriate fascicles near the mar- gins of the valve. The fascicles gradually taper and become uniseriate as they approach the center of the valve but retain their identity. The center of the valve is usually marked by a rosette of puncta. Puncta in the radial striae very fine, barely resolvable with the light microscope, about 40 in lOu. The fascicles are separated by narrow, but appreciably thickened radial ribs. A very small marginal spine occurs at the termination of each rib. Fascicles 14-16 in lOu at the valve margin. 175 This species resembles S. tenuis in size and general morphologic struc- ture but differs from that taxon in occurring in colonies, having biseriate rather than multiseriate fascicles of striae on the valve surface, and by its finer structure and ornamentation. Its structure also much resembles that of S. damasi Hust. (1949) but S. subtilis does not approach the maximum size of that taxon and has much finer ornamentation. This species is apparently a recent introduction into the flora of Lake Michigan and has only been found in quantity in< eutrophied areas that also have considerable chloride contamination. Previous reports of its occurrence indicate that it flourishes only in such situations . 716 THNANA TCT._NC.CF STATIONS 135 (46917 CH 12JA1946 0.00028 ) (46?15 Ch 20FE1946 C.C1707 ) (46924 CH 10PY1946 0.C4585 ) (46923 146916 (46758 (46757 (46752 (46749 CH CH . EV EV EV EV 22N01946 4MY1947 5JN1937 25JL1937 15SE1937 12MR1938 0.01311 ) 0.CC17C ) 0.73461 ) C. 16850 ) 0.04354 ) 0.19420 ) (46920 (46919 (46771 (46747 (46750 (46762 CH CF EV EV EV EV 20061946 5JN1947 UJN1937 1AU1937 24SE1937 18MR1938 0.00031 1 C. 00455 I 0. 00238 ) 0.02475 ) C. 01885 ) C. 04411 ) (46909 (46922 (46764 (46763 (46748 (46751 Ch CH EV EV "" EV EV MR1947 21AU1947 17 JL 1937 23AU1937 130C1937 30MB1938 C. 01821 ) C.0C097 1 C. 41096 ) C.C405S ) C.02135 ) C.C3350 ) (46756 ( 1236 EV ... £.____ __ E 2 C.V.I..... D 5 C 1 27AP1938 8JN1964 13JN1964 16JL1964 15JL1964 10AU1964 0.0C168 1 0.CC350 ) 0.00148 ) C. 00279 ) 0.0077C ) 0.CC965 ) (46761 ( 1237 ( 1243 ( 1253 ( 1256 ( 1444 EV C 2 E 6 C 2 E 2 8 6 27WY1938 8JN1964 C. 00545 ) C. 00258 ) (46766 1 1240 EV 0 B C E C 6 6 2 3 7 14DE1S36 10JM964 1UL1964 15JL1964 14JL1964 22SE1964 C. 01584 1 C.CC460 ) < 1241 ( 1252 ( 1255 ( 1264 13JN1964 16JL1964 14JU964 19SE1964 C. 00209 ) 0.00228 I 0.00183 I C. 00303 ) ( 1440 ( 1254 ( 1257 ( 1271 C.C1474 ) C.CC383 ) 0.00239 1 C.CC653 1 ( 1272 ( 1279.. C 1 ... E...1 B 3 ....£. 1 . F 3 D 1 10SE1964 16SE1964 15001964 120C1964 110C1964 8N01964 0.01642 ) 0.07068 ) CYCC218 ) 0.00539 ) ( 1277 ( 1284 ( 1295 ( 1300 0 4 E 6 D 4 E 3 B 6 0 3 18SE1964 17SE1964 0.00620 1 0.C0635 I ( 1278 ( 1287 0 F D F C D 6 3 6 2 1 4 18SE1964 15SE1964 140C1964 110C1964 10N01964 9N01964 0.00384 ) C. 01001 ) ( 1288 ( 1298 15GC1964 130C1964 NC1964 9N01964 0.01784 ) 0.C0358 1 C. 00361 ) C. 00193 ) ( 1297 ( 1305 ( 13C9 ( 1314 C.CC190 1 C.0C173 I ( 1306 ( 131 1 0.00277 ) 0.00516 ) ( 1307 ( 1313 C.CC161 ) C.CC287 ) ( 1316 ( 1319 .. ( 1323 ( 1341 _ ( 1431 I 1435 0 6 - . .£. 3 F 1 - -A.. 3 . A 3 r. 7 9NC1S64 7 NO 196.4.. 6N01964 19AP1967 12JN1967 13.IN1967 0.00378 ) 0.00262 ) 0.00139 ) 0.00434 1 0.00257 ) 0.00316 1 ( 1317 ( 1320 ( 1324 ( 1370 ( 1432 1 1438 E 1 E 4 F 2 A 6 A 4 E 5 6N01964 7N01964 6N01964 3MY1967 13JN1967 14JN1967 C. 00574 I 0.00207 ) 0.00466 ) 0.00230 I 0.00255 ) C. 00726 ) ( 1318 ( 1321 ( 1339 ( 1416 ( 1433 ( 1446 E E C E C A 2 5 5 5 3 3 7N01964 7N01964 28MR1967 28MY1967 17JN1967 11JL1967 C.C0380 ) C.CC958 ) C.C0312 ) C. 00437 1 C.C1292 ) C.0C245 1 ( 1447 I 1454 A 4 E 5 A 6 E 3 11JL1967 15JL1967 19SE1967 24SE1967 0.00234 ) O.CC200 1 0.00620 ) 0.01294 1 ( 1451 ( 1532 ( 1535 ( 1541 C 7 A 3 16JL1967 18SE1967 0.00197 ) 0.00657 I ( 1452 ( 1533 £ A 2 4 14JL1967 19SE1967 C. 01277 ) C.C2785 ) ( 1534 _.t. .1537 C 7 E 2 20SE1967 110C1967 0.01288 ) C. 07983 ) ( 1536 ( 1542 E E 2 3 24SE1967 U0C1967 C. 01091 ) C.C2034 ) ( 1543 ( 1556 E 5 GS 3 100C1967 3CC1967 0.01437 1 0.03650 ) ( 1554 ( 1557 GS 1 GS 4 30C1967 30C1967 0.08539 1 0.02990 ) ( 1555 ( 1558 CS CS 2 5 30C1967 4CC1967 C. 01059 ) 0.0C793 ) ( 1559 . t .156 3 ._. GS 7 GS11 GS14 GS21 MS 1 8H 1 40C1967 5CC1967 5CC1967 60C1967 2CC1967 18SE1967 0.01049 1 0.00468 ) 0.00183 ) 0.00112 ) 0.00798 ) 2.56742 ) ( 1560 ( 1564 ( 1569 ( 1575 ( 1546 ( 1523 GS 8 GS12 40C1967 50C1967 0.03306 1 C. 00165 ) ( 1561 < 1565 CS 9 CS13 40C1967 50C1967 C. 00587 ) C. 00507 ) ( 1566 ( 1573 GS17 GS28 LU 1 RA 1 50C1967 6CC1967 20C1967 19SE1967 0.00149 ) 0.00129 ) C. 13005 i 0.08303 ) ( 1571 ( 1544 ( 1521 "" ( 1526 GS19 CU 1 60C1967 20C1967 C.CC059 ) C. 16203 ) ( 1547 ( 1522 SH KO 1 1 18SE1967 2CSE1967 C. 04616 ) 1.18336 ) ( 1527 ( 1530 ( 1548 ( 1550 TR 1 FR 1 CA 1 MR 1 NS 2 HO 2 2CSE1967 24SE1967 3CC1967 5CC1967 29MY1967 22MY1967 1.00629 1 0.10001 ) 0.01272 ) 0.61950 ) 0.010 50 ) 0.04860 ) ( 1528 ( 1531 ( 1549 [ 1553 ( 13 51 ( 1350 SB 1 Gh 1 MC 1 SG 1 MI 2 BH 2 20SE1967 25SE1967 40C1967 60C1967 0.50534 1 C. 48183 ) 0.10963 ) 0.02203 ) ( 1529 ( 1545 ( 1551 ( 1428 ( 1427 ( 1401 es IU KO 1 1 1 2 2 2 20SE1967 20C1967 50C196 7 29MY1967 29MY1967 6MY1967 C. 09593 ) C. 29056 ) C.C3994 ) C. 53030 ) ( 1426 ( 1417 21AP1967 19AP1967 C. 00621 ) 3.24222 ) C. 02421 ) C.C294C ) ( 1402 ( 1354 TR 2 GH 2 GB 2 WA 2_ 6CY1967 25AP1967 13MY1967 25MY1967 0.08664 1 C. 01036 ) 0.00270 ) 0.04710 ) ( 1400 ( 1429 ( 1419 ( SB 2 WL 2 6MY1967 29fY1967 23NY1967 1.33429 ) 0.07432 1 C. 01831 ) ( 1352 ( 1349 ( 1422 KW CI CA 2 2 2 21AP1967 19AP1967 23MY1967 0.01718 I C.0C359 ) ( 1406 1.1423 BU 2 C.C1533 ) Stephanodisous tenuis Hust. Stephanodisous tenuis Hustedt ex Huber-Pestalozzi, Binnengew., Vol. 16, Teil 2, Halfte 2, p. 411, pi. 122, fig. 506. 1942. Cells circular in valve view and rectangular in girdle view. Vegeta- tive cells occur singly or in colonies. Valves of specimens from Lake Michi- gan 12-25u in diameter without marked depression in the central portion. Radial striae in multiseriate (usually 4-5) fascicles near the margin. The fascicles gradually taper but retain their identity to near the center of the valve. Some of the fascicles become uniseriate and end about one-quarter the valve diameter from the center, others become sinuous and extend to near the center of the valve. The center of the valve is often marked by a small rosette of puncta. The fascicles are separated by narrow, but noticeably 176 thickened ribs. The spines are small and very regular in their placement, one spine occurring at the end of each interfascicular rib. The spines have apparently thickened bases. Structure of the entire valve fine and difficult to resolve. Puncta in the radial striae fine, about 24-30 in lOu. Fascicles and spines 6-7 in lOy at the margins of the valves. Because of its small size and fine structure this species is difficult to distinguish from other small species of the genus, especially S. hantzsohii 3 unless considerable care is exercised. In structure it most resembles S. transilvanicus but it is easily distinguished from that species by its smaller size range and much finer structure. ___4_i STTrmilS TCT Htl OF STAT1CNS 190 X.35CL7 _ ._ CH_ 19FE1881 0.01132 1 46915 CH 20FE1946 0.01707 ) 46914 CH 19AP1946 1.14465 ) (46924 _146_90_9._ CH ______ CH EV 10PY1946 MR1947 MY1947 18AP1938 0.27513 ) 0.03643 1 46923 46912 CH CH 22N01946 AP1947 0.00656 ) 0.0115O ) 46905 46916 CH CH JA1947 4MY1947 0.00123 ) C. 00645 ] (46906 (46772 0.14336 ) 0.02839 ) 46519 (46756 CH EV 5JN1947 27AP1938 C. 00152 1 0.23507 ) 146922 46761 CH EV 21AU1947 27MY1938 C. 00048 ) C.CC818 I ( 1225 I. .122.. __ C 0 6 2 15MY1964 14MY1964 0.C1568 ) 0.00584 1 1226 1229 C D 7 5 16HY1964 14MY1964 C. 04947 ) 0.00846 ) 1227 1 1230 C E 2 2 13MY1964 16MY1964 16JN1964 10JN1964 C.CC219 ) C. 05927 1 ( 1231 1 1439 E . Ji_ 3 _£ _ 16MY1964 5.IN1964 0.00245 ) _ Q___Q.3_5.96 .). .. ( 1234 1237 B C 3 2 18JN1964 8JN1964 0.00562 I 0.01805 1 1235 ( 1240 C D 7 6 C.C5649 ) C.CC460 ) ( 1241 ( 1440 E B 2 6 13JN1964 11.JL1964 0.00296 1 0.01843 1 1243 1441 E B t 6 13JN1964 24JL1964 0. 01253 ) C. 00661 1 ( 1244 ( 1249 F C 1 3 UJM964 8JL1964 0.CC219 ) C.CC543 1 I 1250 ( 1253 C _.£!_ E B 6 2_ 10JL1964 16JL1964 0.16033 ) 0.00228 ) 1251 ( 1254 C 0 7 2 16JL1964 15JL1964 C. 00290 ) 0.00575 ) ( 1252 ( 1255 0 F C 1 5 1 7 16JL1964 15JL1964 6JL1964 22SE1964 17SE1964 17SE1964 C.C0558 ) C. 02310 ) [ 1256 ..____1__Z__ 2 6 14JL1964 2AU1964 0.00733 I CL.0_Q341_ ) ( 1257 1264 E C 3 1 14JL1964 10AU1964 0.00239 ) C. 00193 ) ( 1258 ( 1271 C.CC472 1 C. 01306 ) ( 1272 1 1277 1 4 10SE1S64 18SE1964 0.02463 ) C.C0620 ) ( 1273 1278 0 2 6 10SE1964 18SE1964 C.C1075 ) 0.00769 ) I 1274 ( 1284 0 E 1 6 C.CC469 1 C.CC318 ) ( 1269 ( 1255 C 0 7 4 140C1964 15CC1964 0.00440 ) 0.OC595 ) 1290 ( 1297 C" c 1 6 160C1964 140C1S64 C. 00379 ) C. 00952 ) 1293 1301 0 E 2 4 150C1964 130C1964 C. 00472 1 C.CC442 ) ( 1302 ( 1306 .._ E £_ D f. 5 3 1 3 13CC1964 U0C1964 8N01964 27JA1967 0.00405 I 0.00277 1 0.00774 1 C. 00193 ) 13C4 1307 1316 1337 F B D C 1 6 6 3 110C1964 N01964 9N01964 2MR1967 0.00247 ) C. 00361 1 ( 1305 1309 F C 2 1 110C1964 10N01964 C.0C173 ) C.CC161 ) ( 1311 1 1336 0.00378 ) C. 89067 ) 1320 1338 E C 4 3 7N01964 28MR1967 C.0C207 1 C. 86476 ) ( 1339 [_ 13A2 C A_ C ______ A F 5 4 5 5 6 ? 28HR1967 __19_A.FU.96Z.. 25AP1967 23AP1S67 3MY1967 7KY1967 0.05300 ) ...Q.,J64_2-2-)-_ 1340 1343 c A 7 6 28MR1967 19AP1967 1.27255 ) 2.91790 1 1341 1344 A C 3 3 19AP1967 25AP1967 C. 49358 ) C. 00993 ) ( 1345 L.134ja_. 0.00780 1 L.24743 1 0.07366 ) 0.02391 ) 1346 ( 1368 1371 1376 c A 7 3 21AP1567 4MY1967 C. 93467 ) C. 05655 ) 1347 1369 E A 2 4 5 3 23AP1967 4MY1967 5MY1967 23MY1967 0.08129 ) C.CU18 ) ( 1370 ( 1374 c E 3 5 4KY1S67 6MY1967 0.00231 ) C. 00281 1 1372 1 1408 C A C.CC355 ) C.0C447 I 1 1416 .L.1A32 E £__ 5 3 28MY1967 17JN1967 0.27772 ) 0.03875 ) 1431 1434 1448 1511 1534 1537 A C 3 5 12JN1567 17JN1567 C. 01.287 ) C. 00897 ) 1432 1435 A C 4 7 13JN1967 13JN1967 C. 02044 1 C.C5683 ) ( 1438 ( .1452 __ E F 5 2 14JN1967 _-_.4JL19.67 19SE1967 24SE1967 0.00363 ) Oj-01064 J 0.14855 ) 0.03545 ) A E A E 6 2 10JL1967 1SE1967 G. 01061 ) 0. 00307 ) 1451 1532 C A 7 3 16JL1967 18SE1967 C. 21259 ) C. 00986 ) ( 1533 ( 1536 A E 4 ? 6 3 19SE1967 24SE1S67 0.02172 ) 0.01294 I 1535 1538 C E 7 5 20SE1967 23SE1967 C. 00322 ) 0.02210 ) ( 1539 ( 15.4.2. C _£__ 3 3 40C1967 ._U0C_L___6__7 C. 01006 ) 0.00509 ) 154C 1543 C E 5 5 40C1967 100C1967 0.00496 1 0.01437 ) 1541 1380 E GS 2 4 110C1567 9MY1967 C.C2661 ) C. 00336 ) I 1384 ( 13_L9 GS 8 GS13 1CMY1967 12MY1967 0.00185 ) 0.00516 I 1385 1390 GS 9 GS14 10MY1967 12MY1967 C. 01177 ) 0.01174 ) 1386 1391 C-S1C C-S15 12HY1967 12MY1967 C.CC862 ) C. 02873 ) ( 1392 ( 1 395 I 1398 ( 1557 GS16 GS1Q GS22 GS 4 GS10 1.S14 12MY1967 1 3MY1 967 14MY1967 30C1967 0.11095 ) 0.45212 1 0.00607 ) 0.00747 ) 1393 1396 1555 1559 GS17 GS20 GS 2 GS 7 13MY1967 13PY1967 30C1967 40CI567 C. 02465 ) 0.17683 > 0.00.53 1 0.00350 ) 1394 1397 1556 1560 Gsia GS21 GS 3 GS 8 13CY1967 13MY1967 30C1967 40C1967 C. 05505 ) 1.55664 ) 0.01043 ) C. 00945 ) ( 1562 (1566. 50C1967 50C1967 0.00493 ) 0.00734 ) 1564 1567 GS12 GS15 50C1967 50C1967 0.00329 1 0.00476 ) 1565 1568 GS13 GS16 50C1967 50C1967 C. 01014 ) C.CC433 ) ( 1569 ( 1573 GS17 KS21 50C1967 6fir.l967 0.00149 ) 0.03136 1 1571 1574 GS19 _£S22 60C1967 60C1967 C. 00176 ) 0.00575 ) 1572 1575 C-S20 CS28 CI 1 SH 1 6CC1967 60C1S67 20SE1967 18SE1967 C.0C451 ) C. 00645 ) C. 08757 ) C. 32887 ) ( 1544 I 1546 MU LU 1 1 20C196 7 20C1967 0.24067 ) 1.20042 I 1547 1520 MS HO 1 1 20C1967 18SE1967 0.00798 ) 0. 01886 ) 1524 1521 ( 1522 1 1526 BH HO 1 1 18SE1967 20SE1967 13.88742 ) 0.21619 ) 1523 1527 RA TR 1 1 15SE1967 20SE1967 0.26753 1 C. 06918 ) 1525 1528 PM SB 1 1 1 1 1 2 20SE1967 20SE1967 25SE1967 40C1967 50C1967 29MY1967 C. 01393 ) 1 1529 1 1545 KW HI. 1 1 2CSE1967 20C1967 0.01199 ) 0.13514 1 1530 1548 FR CA 1 1 24SE1967 30C1967 C. 11001 ) 0.02544 ) 1531 1549 CH KO MR MS C. 03381 1 I 1551 ( 1553 ES SG 1 1 50C1967 60C1967 0.00799 ) 0.02203 ) 1552 1428 SK MU 1 2 60C1967 29MY1967 0.C1981 ) 1.10880 I 1550 1426 C. 11151 ) 5.37533 ) 1 1351 ( 1418 PI SH 2 2 21AP1967 22MY1967 8.68891 ) 0.07776 ) 1427 1350 LU BH 2 2 29HY1967 19AP1967 0.13317 1 5.14526 ) 1417 1425 h0 RA 2 2 22MY1967 25MY1967 6MY1967 23AP1967 5.02467 ) ( 1399 I 1400 PW SB 2 2 5MY1967 6MY1967 0.29924 1 0.60162 ) 1401 1352 M0 KM 2 2 6KY1967 21AP1967 1.31703 ) 0.51538 ) 1402 1353 TR FR 2 2 1.05047 ) 5.23207 ) ( 1354 ( 1405 GH ES 2 2 25AP1S67 12MY1967 12.42772 1 0.16125 ) 1429 1407 ML SM 2 2 29KY1967 14MY196 7 2.88778 1 0.50158 ) 1404 1349 f.Q CI 2 2 I0MY1967 19AP1967 C. 02541 ) 5.8C501 ) I 1406 ( 1421 GB CH 2 2 13HY1967 23MY1967 0.06739 ) 0.27758 ) 1419 1422 BU GA 2 2 23MY1967 23MY1967 0.18308 ) 0.43938 ) 1420 1423 IH WA 2 2 23MY1967 25MY1967 C. 24165 1 3.35717 1 ( 1424 KN 2 25MY1967 0.98588 1 Stephanodisaus transitvaniaus Pant. Stephanodisous transilvaniaus Pantocsek, Beitr,, Kenntn. Foss. Bacill. Ungarns, p. 96, Beitgr. Ill, pi. 8, fig. 125. 1905. Stephanod-isaus astraea var. intermedia "Fri eke in: A. Schmidt's Atlas Diat., pi. 225, figs. 37-39. 1901. 177 Stephanodisous astvaea var. tvansiVoanioa Fricke in: A. Schmidt's Atlas Diat., pi. 226, figs. 2-22. 1901. Stephanodisous astvaea var. multipunotata Fricke in: A. Schmidt's Atlas Diat., pi. 226, figs. 23-24. 1901. Cells circular in valve view and rectangular in girdle view. Vegetative cells always occur singly. Valves of specimens from Lake Michigan 14-60u in diameter, with markedly concave center. Radial striae in multiseriate (usually 4-6) at the margins, fascicles becoming uniseriate and, eventually, disorganized as they approach the sunken center portion of the valve. Puncta in the radial striae usually fine but irregular in size and placement, 14-20 in lOp. The fascicles are separated by quite wide and markedly thickened radial ribs. The spines are regularly placed in this species and one spine usually occurs at the end of each rib. A narrow marginal zone of fine, ir- regularly arranged, puncta is present in the larger individuals and the ribs and spines extend into this zone. In smaller specimens this feature is not apparent in valve view due to the accentuated contour of the valve. Fascicles and spines 3-5 in lOu at the margins of the valves. Although the only reports of this species from Lake Michigan are those of Skvortzow (1937), it is the most abundant large member of the genus in the offshore plankton at the present time and is abundant in collections dating back to 1876. 645 STTRAKSI TCT NO OF STATIONS 290 (60973 ( 3507 CH CH 1876 19FE1881 3.47189 ) 0.27168 ) 1 3540 (46910 CH CH 11HY1879 0C1945 0.47524 ) C. 00109 ) ( 3541 (46921 CH CH 1FE1881 23N01945 1.59444 ) C. 00841 ) (46917 146924 CH CH 12JA1946 10MY1946 0.09898 ) 0.55026 ) (46915 (46923 CH CH 20FE1946 22N01946 0.26177 ) 0.01748 ) (46914 (46920 CH CH 19AP1946 20DE1946 1.C7524 ) 0.01695 1 (46905 146916 CH CH JA1947 4MY1947 0.11398 1 0.03325 ) (469C9 (465C6 Ch CH MR1947 MY1947 0.59196 ) 0.12942 ) (46912 (46919 CH CH AP1947 5JN1947 C. 13798 ) 0. 08194 ) (46907 146758 CH FV JL1947 5JN1937 0.44873 ) 0.66329 ) (46513 (46771 CH EV 6AU1947 11JN1937 0.01046 ) 0.37326 ) (46922 (46743 CH EV 21AU1947 20JN1937 0.C5767 ) C. 21838 ) ( 1372 ( 1375 C 5 E 3 (46745 L4614L EV EV 3JL1937 1AU1937 0.08359 I 0.01485 1 (46764 (46763 EV EV 17JL1937 23AU1937 0.12893 ) C. 02029 ) (46757 (46769 EV EV 25JL1937 7SE1937 C.1C110 ] 0.04342 ) (46752 EV FV 15SE1937 270C1937 0.02177 ) 0.00774 ) (46744 (46749 EV EV 60C1937 12KR1938 0.00975 1 0.19420 ) (46748 (46768 EV EV 130C1937 16HR1938 C. 38429 ) C. 10290 I (46762 146756 EV EV 18HR1938 27AP1938 0.06617 1 0.14776 ) (46751 (46759 EV EV 30MR1938 19KY1938 0.05583 ) 0.29710 ) (46772 (46761 EV EV 18AP1.938 27MY1938 C. 12775 ) C. 11719 ) ( 1223 ( 1226 B C 3 7 18MY1964 16MY1964 0.02188 ) 0.05327 ) ( 1224 ( 1227 B C 4 2 18MY1964 13HY1964 0.10195 ) C. 04935 ) ( 1225 ( 1228 C 0 6 2 15MY1964 14MY1964 C. 05880 ) C. 23161 1 ( 1229 ( 1232 0 F 5 5 14MY1S64 16HY1964 0.26855 1 0.79133 1 ( 1230 ( 1233 E B 2 3 16HY1964 5JN2964 0.05038 ) 0.03096 ) ( 1231 ( 1234 E B 3 3 16MY1S64 18JN1964 C. 85608 ) 0.00281 ) ( 1235 ( 1717 C C 7 i 16JN1964 8JN1964 0.01130 ) 0.03351 1 ( 1439 ( 1238 B D 6 3 5JN1964 11JM964 0.02198 ) 0. 25400 ) ( 1236 ( 1239 D 1 4 8JN1964 11JN1964 C. 01750 ) C.C2785 1 ( 1240 ( 1243 D F 6 6 10JN1964 13JN1964 0.08130 ) 0.22551 ) 1 1241 ( 1244 E F 2 1 13JN1964 11JN1964 0.56924 ) 0.08114 ) ( 1242 ( 1245 E F 3 7 13JN1964 11JN1964 C. 41963 I C. 22128 ) ( 1246 ( 1440 F 3 6 11JN1964 11JL1964 0.20319 1 0.01106 ) 1 1247 (_1441 B B 3 6 14JL1S64 24JL1964 0.00427 ) 0.03745 1 ( 1248 ( 1249 B C 3 3 24JL1964 8JL1964 C. 00985 ) 0.00272 ) 1 1250 1 1253 C c* E F 6 2 2 ? 10JL1964 16JL1964 0.02878 I 0.04108 ) ( 1251 ( 12 54 C D 7 2 16JL1964 15JL1964 0.01738 1 0.18004 ) ( 1252 ( 1255 c 0 1 5 16JL1964 15JL1964 C.0C637 ) 0.18993 ) ( 1256 ( 1259 14JL1964 6JL1964 0.13556 ) 0.16423 ) ( 1257 ( 1260 E F 2 3 14JL1964 6JL1964 0.50245 ) 0.14134 ) ( 1258 < 1261 F B 1 3 6JL1964 2AU1964 C.3C441 1 0.00196 ) ( 1262 I 1243„ B r, 3 7 17AU1964 15AU1964 0.C2310 1 0.00400 ) ( 1442 ( 1264 B C 6 1 2AU1964 10AU1964 0.00682 ) 0.00579 ) ( 1443 ( 1265 B C 6 2 16AU1964 10AU1964 0.CC198 ) 0.00671 ) ( 1266 1 1770 D F 3 1 18AU1964 10AU1964 0.05963 ) 0.01361 ) ( 1268 ( 1444 E B 2 6 15AU1964 19SE1964 C. 20243 ) 0.04244 ) ( 1269 ( 1271 E C 3 7 15AU1964 22SE1964 C. 76742 ) C. 01959 ) ( 1273 ( 1276 c n 2 3 10SE1964 18SF1964 0.02688 1 0.02235 ) { 1274 ( 1278 0 0 1 6 17SE1964 1BSE1964 0.01408 I 0.01153 1 ( 1275 ( 1280 0 E 2 2 17SE1964 16SE1964 C.C1290 1 0.03404 ) ( 1281 ( 1284 E F 3 6 16SE1964 17SE1964 0.16482 t 0.00953 I ( 1282 ( 1285 E F 4 1 16SE1964 15SE1964 0.02216 ) 0.05241 ) ( 1283 ( 1286 E F 5 2 USE 1964 15SE1964 C. 12872 ) C. 01095 I ( 1287 F 3 15SE1964 0.01001 I n. 01137 1 ( 1445 ( 1791 B r.t 6 1 140C1964 1 Ann 964 0.00326 ) 0.OO734 1 ( 1289 1 1793 C n 7 7 140C1564 15nri964 C. 15391 ) 0.00943 ) ( 1294 I 1297 D n 3 6 150C1964 14001964 0.06593 1 0.02666 1 ( 1295 ( 1298 0 E 4 1 150C1964 120C1964 0.08324 I 0.01885 ) ( 1296 ( 1299 D E 5 2 14DC1964 120C1964 0.02754 1 0.01257 ) ( 1300 I 1301 E F 3 6 130C1964 13nr.l964 0.11455 1 0.02799 ] ( 1301 ( 1304 E F 4 1 130C1964 11CC1964 0.18546 ) 0.00247 ) ( 1302 ( 1305 E F 5 ? 130C1964 HOC 1964 0.04454 ) C.0C518 ) ( 1306 I 1309 F r.' 3 1 U0C1964 10N01964 0.00554 1 0.00322 1 ( 1307 ( 1310 B 6 N01964 10N01964 0.00361 ) C. 00454 1 ( 1308 ( 1311 C D 7 1 6N01964 8N01964 0.01521 ) C. 00258 ) ( 1312 ( 131 5 0 D 2 5 8N01964 9NG1964 0.00621 ) 0.03185 ) ( 1313 ( 1317 D E 3 1 9N01964 6NG1964 C. 09653 ) 0.00574 ) ( 1314 ( 1318 D E 4 2 9N01964 7NG1964 C. 04019 ) C.C8181 ) ( 1319 ( 1322 E E 3 6 7N01964 7N01964 0.18328 1 0.03666 ) ( 1320 ( 1323 E F 4 1 7N01964 6N01964 0.05584 ) 0.00279 1 ( 1321 ( 1324 E F 5 2 7NC1964 6N01964 0.02B73 > C.C1398 ) ( 1325 ( 1338 F r. 3 3 6ND1964 28MR1967 0.00756 ) 1.42011 I ( 1336 ( 1339 C C 3 5 27JA1967 28MR1967 0.01540 1 2.07333 ) ( 1337 ( 1340 C C 3 7 2MR1967 28MR1967 0.06671 ) C. 16580 ) ( 1341 ( 1344 A C 3 3 19AP1967 25AP1967 0.18225 ) 0.28952 ) ( 1342 ( 1345 A C 4 5 19AP1967 25AP1967 0.50530 ) 1.77378 ) I 1343 ( 1346 A C 6 7 19AP1967 21AP1967 C. 21120 I 0.23367 ) I 1347 ( 1369 E A 2 4 23AP1567 4MY1967 1.36574 ) 5.47915 ) ( 1348 ( 1370 E A 5 6 23AP1967 3HY1967 0.24400 1 C. 21637 1 ( 1368 ( 1371 A C 3 3 4MY1967 4MY1967 1.97926 ) 1.93915 ) 5HY1967 _7MY1967 6.45482 ) 0.84218 ) ( 1373 1 1376 C 7 E 5 5MY1967 6HY1967 2.59570 ) C. 78705 1 ( 1374 ( 1408 E 2 A 3 7MY1967 23HY1967 2.30126 ) 1.56508 1 178 ( 1409 A C 4 5 23MY1967 31MY1967 0.41659 1 2.35710 ) 1410 1413 A C 6 7 24MY1967 25MY1967 1.18403 ) 2.43232 ) ( 1411 ( 1414 C e 3 2 31MY1967 28MY1967 C. 96008 ) 1.41058 ) ( 1415 E 3 28MY1967 13JN1967 0.94437 ) 4.11260 ) I 1416 1433 E C 5 3 28MY1967 17JN1967 C. 20556 ) 1.13034 ) ( 1431 ( 1434 A c 3 5 12JN1967 17JN1967 C. 36048 1 3.76839 ) ( 1435 C F 7 5 13JN1967 14.IN1967 0.59988 » 1.52505 ) 1436 1446 E A 2 3 15JN1967 11JL1967 6.33232 ) 0.01468 ) ( 1437 ( 1447 E A 3 4 15JN1967 11JL1967 4.33343 ) C. 16373 ) ( 1448 A 6 7 10JL1967 16JL1567 0.02476 1 0.01181 ) 1449 1452 C E 3 2 16JL1967 14JL1967 1.73870 ) 0.27036 1 ( 1450 ( 1453 C E 5 3 16JL1967 15JL1967 1.73284 1 2.47706 ) ( 1454 E C 5 5 15JL1967 7SE1967 0.01600 ) 0.47441 ) 15C4 1510 A C 3 7 28AU1967 29AU1967 0.00988 ) 0.0031.6 ) ( 1508 ( 1511 C E 3 2 2SE1967 ISE1967 0.C1998 1 0.42975 1 ( 1512 E F 3 2 1SE1967 74SE1S67 1.46851 ) 0.03817 ) 1513 1537 E E 5 3 31AU1S67 24SE1967 0.06588 } 4.22669 ) ( 1533 ( 1538 A E 4 5 19SE1967 23SE1967 C.0C464 ) C. 45849 ) ( 1540 ( 1543 C E 5 5 40C1967 100C1967 0.00496 > 0.01437 ) 1541 1377 E GS 2 1 11-C1967 9MY1967 C. 02129 ) 1.01326 ) ( 1542 ( 1378 E GS 3 2 110C1967 9MY1967 1.77990 ) C. 24810 ) ( 1379 GS 3 9MY1967 10MY1967 0.36828 1 0.64948 ) 1380 L 13.83 GS GS 4 7 9MY1967 10MY1967 0.28754 1 0.15237 ) ( 1381 ( 1384 GS GS 5 8 10MY1967 10MY1967 C. 25998 ) C. 47324 ) ( 1385 GS GS 9 10MY1967 17MY1967 0.06357 ) 0.04223 ) 1386 1389 GS10 GS13 12MY1967 12MY1967 0.43953 ) 0.01289 ) ( 1387 ( 1390 GS11 GS14 12MY}967 12MY1567 C. 15447 ) 0.04698 ) ( 1391 GS15 GS1S 12MY1967 13MY1967 0.16760 ) 0.60206 ) 1392 L..L3S5 GS16 GS19 12MY1967 13MY1967 0.05548 ) 0.09864 ) ( 1393 ( 1396 GS17 GS20 13MY1967 13MY1967 C. 04931 ) C.0C592 1 ( 1397 GS21 GS 7 13MY1967 30C1967 0.00523 ) 0.00706 ) 1398 1557 GS22 GS 4 14MY1967 30C1967 0.19431 ) C. 01121 1 ( 1554 ( 1558 GS GS 1 5 30C1967 40C1967 C. 01423 ) C.0C396 ) ( 1559 GS 7 GS14 40C1967 5tlC1967 0.01399 ) 0.00183 ) 1562 1567 GS10 GS15 50C1967 50C1967 0.00493 I 0.07780 1 ( 1563 ( 1568 GS11 GS16 50C1967 50C1967 0.00701 ) C.C1154 ) ( 1569 ( 1577 GS17 r,s?o 50C1967 60C1967 0.58865 ) 0.00180 ) 1570 1573 GS18 GS21 50C1967 60C1967 0.33717 ) 0.03920 ) ( 1571 ( 1574 GS19 GS22 60C1967 60C1967 C. 00351 1 C. 01438 ) ( 1575 GS28 Hfl 1 60C1967 18SF1967 0.01677 ) 0.02357 ) 1544 L_.l_5.21 MU SH 1 1 20C1967 18SE1967 0.00477 1 0.01731 1 ( 1546 ( 1526 _U 1 1 20C1967 20SE1967 C.C7503 ) C. 04551 1 ( 1527 TR Ul 1 1 20SE1967 7nr.l967 0.00629 I 0.08784 ) 1528 1548 SB CA 1 1 20SE1967 30C1967 0.05775 ) 0.01272 ) ( 1529 ( 1551 KM ES 1 1 20SE1967 50C1967 C. 02398 ) C.0C799 ) ( 1552 SM 1 7 60C1967 79HY1967 0.00660 ) 0.04821 I 1550 1426 MR MS 1 2 50C1967 29MY1967 0.06195 ) 0.881139 ) I 1553 ( 1351 SG MI 1 2 60C1967 21AP1967 0.03672 ) C. 20171 ) ( 1427 LU 2 29MY1967 19AP1967 3.48668 ) 0.01542 » 1417 1425 HO RA 2 2 22MY1967 25MY1967 0.22432 ) 0.22102 1 ( 1418 ( 1399 SH PM 2 2 22MY1967 5MY1967 C.C4666 ) 0.42845 ) ( 1401 1 1 157 MO 2 7 6MY1967 71AP1967 0.28222 ) 0.C8590 1 1402 1353 TR FR 2 2 6MY1967 23AP1S67 0.34113 ) C. 21097 ) ( 1400 ( 1354 SB GH 2 2 6MY1967 25AP1967 0.75054 1 C. 04143 ) I 1429 UL FS 2 7 29MY1967 17HY1967 0.98737 ) 0.14190 ) 1 1403 1407 CA SM 2 2 10MY1967 14MY1967 1.42540 ) 0. 04777 ) ( 1404 { 1349 MC CI 2 2 10MY1967 1SAP1967 0.07622 ) C. 04670 ) ( 1406 GB r.H 2 7 13MY1967 23MY1967 0.00270 ) 0.26024 ) 1419 I 1422 BU GA 2 2 23MY1967 23MY1967 0.16477 ) 0.19414 ) ( 1420 ( 1423 IH MA 2 2 23MY1967 25MY1967 G. 09063 ) C. 35970 ) ( 1424 KN 2 25MY1967 0.26645 ) 1430 MC 2 12JN1967 0.02467 ) ( Species inoertae sedis Stephanodisous sp. #5. 646 STSPECOE TOT NG OF STATIONS 135 (46917 (46974 CH r.H 12JA1S46 10MY1946 0.00028 ) 0.00071 ) (46915 46 923 CH CH 20FE1946 22N01946 0.03414 1 0.00437 I (46914 (46909 CH CH 19AP1946 MR1947 C.CC961 ) 0.18669 1 C46916 (_46.922_ CH CH 4MY1947 21AU1947 C. 00102 ) 0.00048 ) (46906 46758 Ch EV MY1947 5JN1937 C. 02057 ) 0.00357 ) (46915 146756 CH EV 5JN1947 27AP1938 C.CC455 I C.0C672 I (46761 I 1775 EV C 6 27MY1938 15MY1964 0.00545 1 0.00392 1 1223 1226 8 C 3 7 18MY1964 16MY1964 0.00156 I 0.00331 ) ( 12 24 ( 1227 B 4 2 18MY1964 13MY1964 C.CC588 I C.CC439 ) ( 1228 ( 1231 0 2 E 3 14MY1964 16MY1964 0.00973 ) C. 01712 ) 1229 1232 0 E 5 5 14MY1964 16MY1964 0.03595 ) 0.02261 ) ( 1230 ( 1233 E B 2 3 16MY1964 5JN2964 C.C4149 ) C.C4287 ) ( 1234 ( 1236 B 3 C* 1 18JN1964 8JN1964 0.00843 ) 0.00350 ) 1235 1237 C C" 7 2 16JN1964 8JN1964 0.00847 ) C. 15210 I ( 14 39 I 1238 B C 6 3 5JN1964 11JN1964 C. 34965 ) C.C6400 I ( 1239 ...JL_12_l2_ D 4 E 3 1UN1964 13JN1964 0.00116 ) 0.C0300 ) 1240 1243 D E 6 6 10JN1964 13JN1964 0.01994 1 0.02297 ) ( 1241 ( 1244 E F 2 1 13JN1964 11JN1964 C. 10941 ) 0.CC439 ) ( 1245 ( 1440 ( 1250 _________ ._ F 2 B 6 C 6 C 2 11JN1964 11_1_.19.64 10JL1964 16JL1964 0.02420 ) 0.29849 1 0.69065 ) 0.02054 .1 1246 1 £41 1251 1254 F B C 0 3 6 7 2 UJN1964 24JL1964 16JL1964 15JL1964 0.05379 ) C. 20705 ) C. 00579 I C. 29496 I ( 1248 ( 1249 ( 1252 ( 1255 B C C 0 3 3 1 5 24JL1964 8JL1964 16JL1964 15JL1964 C.0C591 ) C. 00272 ) C.0C837 ) 1.25764 I ( 1256 I 1259 E 2 F 2 B 3 C 1 14JL1964 6JL1964 17AU1964 10AU1964 0.51293 ) 0,09606 1 1257 L 126.CL E F 3 3 14JL1964 6JL1964 0.17705 ) C. 03438 ) ( 1258 ( 1261 F B 1 3 6JL1964 2AU1964 C. 05899 ) C.CC392 1 ( 1262 ( 1264 O.C0630 1 0.00772 ) 1442 1265 B C 6 2 2AU1964 10AU1964 0.09894 ) 0.00894 ) ( 1443 ( 1266 B 0 6 16AU1964 18AU1964 C.0C395 ) 0.45250 ) ( 1268 _L_ 14-44. .. E 2 8.6 D 4 E 3 15AU1964 19SE1964 18SE1964 16SE1964 0.7C030 ) 0.00303 ) 1269 1273 E C" 3 2 15AU1964 10SE1964 0.34534 ) 0.00538 ) ( 1270 ( 1275 F D 1 2 10AU1964 17SE1964 C.0C817 ) 0.0C645 ) ( 1277 _L_l__ajL_ 0.01239 ) 0.00785 ) 1279 1283 E E 1 5 16SE1964 16SE1964 0.01178 ) 0.00613 ) ( 1280 ( 1285 E F D E 2 1 6 4 16SE1564 15SE1964 14CC1964 130C1964 C. 00681 } 0.01747 ) ( 1294 ( 1799 D 3 F 7 150C1964 120C1964 0.00330 ) 0.00628 1 1295 1300 D E 4 3 150C1964 13CC1964 0. 01784 ) 0.01432 1 ( 1297 ( 1301 C.CC190 ) C. 01325 ) ( 1302 ( 1318 E 5 E 2 130C1964 7N01964 0.00405 ) 0.0C951 ) 1305 1319 F E 2 3 110C1964 7N01964 C. 00345 I 0.01047 ) ( 1307 < 1320 B E 6 4 N01964 7N01964 26MR1967 19AP1967 0.00361 ) C.0C827 ) ( 1336 1 _1339. C 3 r. 5 27JA1967 28MR1967 0.00193 ) 0, 00.935- 1 1337 1340 C C 3 7 2MR1967 28MR1967 C. 00441 ) 0.00509 ) ( 1338 ( 1341 C A 3 3 C.C1851 ) C. 00976 ) ( 1342 ( 1346 A 4 C 7 19AP1967 21AP1967 0.0C361 ) 0.05608 ) 1343 1347 A E 6 2 19AP1967 23AP1967 0.00278 ) 0.00438 ) ( 1345 ( 1348 C E 5 5 25AP1967 23AP1967 0.00780 I C.0C548 ) ( 1369 ( 1408 A 4 A 3 4MY1967 23MY1967 0.00373 1 0.0C894 I 1373 1412 C C 7 5 5MY1967 31MY1967 0.00285 1 0.00842 ) I 1374 ( 1432 E A 2 4 7MY1967 13JN1967 C.0C897 ) C.0C511 ) I 1433 ( 1446 C 3 A 3 17JN1967 11JL1967 0.07105 I 0.00489 I 1434 1447 c A 4 17JN1567 11JL1967 0.00299 ) 0.00468 ) ( 1438 ( 1449 E C 5 3 14JN1967 16JL1967 0. 00363 ) C. 34774 ) I 1450 ( 1454 C 5 F 5 16JL1967 15.11 1967 0.02666 ) 0.00400 1 1452 1511 E E 2 2 14JL1967 ISE1967 0.03193 ) 0.01842 1 ( 1453 ( 1512 E E 3 3 15J11967 1SE1967 C. 04297 1 0.01178 ) ( 1513 1 1538 E 5 E 5 31AU1967 73SE1967 0.00507 ) 0.01105 1 1536 1542 E E 2 3 24SE1967 110C1967 0.00273 ) C. 04068 I ( 1537 ( 1378 E OS 3 2 24SE1967 9MY1967 0.01294 ) ( 1379 ( 1386 GS 3 tSlfl GS16 RH 1 SMY1967 12MY1<.6._7__ 12MY1967 18SE1967 0.00309 I 0.0C287 1 1383 1287 GS 7 GS11 10MY1967 12MY1967 0.00267 1 0.00396 1 ( 1384 ( 1389 GS 8 GS13 10MY1967 12MY1967 C. 00370 ) C.CC258 ) ( 1392 I 1522 0.00308 1 1.16701 I 1398 1549 GS22 MO 1 14MY1967 40C1967 C. 00304 ) 0.01370 1 ( 1524 ( 1400 MI SB 1 2 20SE1967 6MY1967 C. 02189 ) C.CC596 ) ( 1352 KM 2 21AP1967 0.09449 ) 1429 ML 2 29MY1967 C. 01062 ) ( 1423 MA 2 25HY1967 C. 02141 I 179 Stephanodisous sp. #10. 649 STSPECCJ TCT NO CF STATIONS 22 (46914 (46909 CH CH 19AP1946 0.01708 I MR1947 0.00911 ) (46924 (46906 CH CH 10MY1546 MY1947 0.C0494 ) 0.01327 ) (46923 (46919 Ch CH 22N01946 5JN1947 0.CC656 ) C. 01214 ) (46758 ... 1.46150 ( 1257 ( 1260 EV EV E 3 F 3 5JN1937 0.0C713 ) 24SE1937 0.00471 ) 14JL1964 0.00957 ) 6JL1964 0.00191 ) (46743 ( 1255 ( 1258 1 1284 EV 0 5 F 1 E t 20JN1S37 15JL1964 6JL1564 17SE1964 C. 01285 ) 0.00513 ) 0.00472 1 0.00318 ) (46757 ( 1256 ( 1259 ( 1337 EV E F C 2 2 3 25JL1937 14JL1964 6JL1964 2MR1967 C. 00963 ) 0.00733 ) C.CC310 ) C.0C294 ) ( 1347 ( 1541 E 2 E 2 23AP1S67 0.00325 1 11GC1967 0.02661 ) ( 1436 ( E 2 15JN1967 0.00362 ) ( 1453 E 3 15JL1967 C. 01264 1 65C STSPECOK ICT NO OF ST/1TKNS 2 (469C7 CH JL1947 0.0C197 ) ( 125C C 6 10JL1964 0.00411 ) ( Genus Suvivetla Turp. Turpin, Mem. Mus. Hist. Nat. (Paris), 16:361. 1828. Although the majority of freshwater members of the genus Suvirella find their primary habitat in benthic communities, many are successful facultative planktonts. Plankton collections from Lake Michigan, especially those from nearshore areas, often contain representatives of the genus, usually in low numbers. Sux>ivella angusta Kutz. Siwivella angusta Kutzing, Bacill. 651 SUANGUST ICT NO OF STATIONS 162 61, pi. 30, fig. 52. 1844. (60973 (46921 (46914 ... (46920 (46916 CH CH CH CH CH 1876 23N01545 19AP1946 20CE1946 4MY1547 0.11809 ) C.0C776 ) 0.04698 ) 0.01109 ) 0.01493 ) ( 3540 (46517 (46924 (465C5 (465C6 CH CH CH CH CH 11MY1879 12JA1946 10HY1946 JA1947 MY1947 0.02796 ) 0.00749 1 0.02540 ) 6.01716 1 C. 02920 ) I 3507 (46915 (46923 1469C9 (46919 CH CH Ch CH CH 19FE1881 20FE1546 22N01946 MR1547 5JN1947 C.C4528 ) C.C1138 ) 0.C1311 ) C. 06375 ) C. 03945 ) (46907 (46.771 CH _£V J11947 „1UN1937 0.01085 ) 0.01426 ) 0.01789 ) 0, 1.5348. 1. C. 01885 ) 0.01214 ) (46522 (46743 (46764 14676.3 (46 744 (46762 CH EV EV EV EV EV 21AU947 20JN1937 17JL1937 23AU1937 60C1937 18MR1938 0.02666 1 0.12846 ) 0.32232 1 C. 04058 ) C. 01463 ) 0.02206 1 (46758 (46745 (46757 (46765 (46748 (46772 EV EV EV EV EV EV 5JN1937 3JL1937 25JL1937 30AU1937 130C1537 18AP1938 C. 19970 ) C.0209O I (4677C (-46.747 . (46750 (46749 EV EV EV EV 9JL1937 1AU1937 24SE1937 12MR1S38 C. 03370 ) 0.0C558 ) C.C2135 ) C.CC710 ) (46756 ( 1223 EV __B._a_ C 7 .. J. _5„ E 5 fl 6 27AP1938 18MY19.64.. 16MY1564 14MY1564 16MY1964 5.JN1964 0.00672 ) 0.C1094 ) 0.01142 1 0.01692 ) 0.06609 1 C.CC999 1 (46761 ( 1224 ( 1227 ( 1230 ( 1233 ( 1236 EV e 4 C 2 E 2 B 3 C 1 27MY1538 18MY1964 O.C1908 ) C. 00980 1 146766 ( 1225 EV C 6 14DE1536 15HY1964 14MYIS64 16MY1964 18JN1964 8JN1964 C.C1584 ) C.0C392 ) ( 1226 ...1 .1229 ( 1232 1 1439 13MY1564 16MY1964 5JN2964 8JN1964 0. 00658 I 0.00889 ) 0.01191 ) 0.00175 I { 1228 ( 1231 ( 1234 ( 1237 D 2 E 3 B 3 C 2 C.0C779 ) C. 07582 1 C.0C281 ) C.0C516 1 ( 1238 1 1241 0 3 _E._2.... F 1 . . 0.2 F I F 3 E 2 -_..f.._l_ E 5 -E..2- E 1 r. 3 11JN1964 13Ji41.9A.4-. 11JN1964 15JI L964 . 6JL1964 15AU1964 16SE1564 -L20CJS64 130C1964 110X1964 . O.C1600 I . __Q..J) .1.18.3.. .)_ 0.04934 I 0,00958 1 0.0C472 ) 0.00548 I 0.00681 I 0.00269..).. 0.00405 i C.CC518 ) ( 1239 ( 1242 ( 1245 ( 1256 ( 1260 ( 1444 ( 1285 ( 1255 ( 1303 ( 1308 D 4 E 3 11JN1964 13JN1964 0.00116 ) 0.01049 I ( 1240 ( 1243 0 6 E 6 10JN1964 13JM564 11JN1964 14JL1564 C. 02301 1 C.C1253 ) ( 1244 F 2 E 2 F 3 8 6 F 1 E 2 E 6 C 7 E 6 C 3 11JM964 14JL1964 0. 02766 ) 0.00916 ) ( 1246 ( 1257 F 3 E 3 0.07769 ) C.C1196 ) ( 1258 ( 1269 ( 1280 6JL1964 19SE1564 15SE1964 120C1564 0.00573 ) C.C0303 1 0.01165 I C. 00314 ) ( 1267 ( 1271 1 1297 ( 1300 0 6 C 7 0 6 E 3 18AU1964 22SE1964 14UC1964 13GC1964 0.00216 ) 0.OC653 ) C.CC190 1 C.C1432 ) ( 1302 ( 1305 130C1964 6NC1564 7N01964 28MR1967 O.C0560 1 C.0O3O4 I C. 00333 1 C.C0926 ) ( 1304 ( 1311 ( 1336 ( 1339 F 1 D 1 C 3 C 5 110C1964 8N0196 4 27JA1967 28HR1967 C. 00988 ) 0.CC258 ) ( 1317 l 1337 6N01964 7MR1967 0.00191 ) 0.00294 ) ( 1322 ( 1338 C.0C193 1 C. 04677 ) ( 1340 C 7 C 7 28MR1967 19AP1967 21AP1967 4MY1967 0.00436 ) 0.01251 ) 0.01202 I 0.C1571 1 ( 1341 ( 1344 ( 1347 ( 1369 A 3 C 3 19AP1967 25AP1967 0.01627 ) 0.00496 ) ( 1342 ( 1345 A 4 C 5 19AP1967 25AP1967 C.0C180 ) C. 01754 1 ( 1346 E 2 A 4 23AP1967 4CY1967 0.00488 ) 0.01118 ) ( 1348 ( 1370 E 5 A 6 23AP1967 3PY1967 C.C1234 ) C.C4143 ) ( 1371 C 3 4MY1967 0.00923 ) ( 1372 C 5 5MY1967 C. 03901 1 n. 01687 1 ( 1374 1 1410 E 2 A 6 7KY1967 24KY1567 C. 01494 ) r.oii?fl i ( 1412 C 5 31MY1967 15JN1967 0.01263 ) 0.0036? ) ( 1415 ( 1532 E 3 A 3 28KY1967 18SE1967 0.00225 ) 0.C0329 ) I 1435 ( 1537 C 7 E 3 13JN1967 24SE1967 0.00316 ) _L.0C431 ) ( 1379 GS 3 GS 6 9MY1967 10KY1967 0.00619 1 0.00555 1 ( 1380 ( 1383 GS 4 GS 7 9HY1967 10MY1967 0.00336 ) 0.00802 ) ( 1381 ( 1384 GS 5 GS 8 10MY1967 10HY1967 C.0C477 I C.0C739 ) ( 1385 GS 9 10MY1967 I.7MY1567 0.00471 I 0. 01707 I ( 1386 ( 1390 GS10 GS14 12KY1967 12MY1967 0.00575 ) C. 02936 ) ( 1387 ( 1391 GS11 CS15 12MY1967 12MY1967 C. 01188 I C.0C479 ) ( 1393 GS17 GS?? 13MY1967 I4MY1967 0.00274 ) 0.00304 ) ( 1394 ( 1558 GS18 GS 5 13MY1967 4CC1967 0.00516 ) 0.00396 ) ( 1397 ( 1567 GS21 GS15 13HY1967 5GC1967 C. 00065 ) C.CC159 1 ( 1574 ( 1529 ( 1428 ( 1427 GS22 M0 1 KW 1 HU ? LU 2 60C1967 0.00288 I 0.07845 1 ( 1546 ( 1527 LU 1 TR 1 20C1967 20SE1967 0.00500 ) 0.05660 ) ( 1523 ( 1528 RA 1 SB 1 19SE1967 20SE1967 C.CC923 ) 0.C1444 ) 20SE1967 0.01199 ) 0.01705 ) ( 1545 ( 1426 ML 1 MS 2 20C1967 25MY1967 0.04730 1 0.01050 1 1 1550 ( 1351 HK 1 fl 2 50C1967 21AP1967 C.C2478 ) C. 03103 ) 2SMY1967 25MY1967 0.01211 ) 0.02652 ) ( 1417 ( 1399 HC 2 PW 2 22MY1967 5KY1967 0.04486 ) 0.02720 ) 1 1350 ( 1401 BH 2 tO 2 15AP1967 6CY1967 C. 00441 ) C. 11759 ) ( 1402 ( 1353 TR 2 FR 2 6MY1967 23AP1967 0.18952 1 0.02110 ) 1 1400 ( 1354 SB 2 GH 2 6KY1967 25AP1967 0.17870 1 0.03107 1 ( 1352 ( 14C3 KM 2 CA 2 21AP1967 10MY1967 0.02577 ) C-C5231 ) ( 1407 SM 2 14MY1967 23MY1567 0.01791 ) 0.05492 1 ( 1349 ( 1420 CI 2 IH 2 19AP1967 23MY1967 0.04670 1 C. 01511 1 ( 1406 I 1421 GB 2 CH 2 13MY1967 23HY1967 CO 1348 ) C.C6940 ) ( 1422 GA 2 23KY1S67 0.16349 ) ( 1423 WA 2 25VY1967 0.08992 ) ( 1424 KN 2 25MY1967 C.C2665 ) 180 Suvivella biseviata Bre__ and Godey Suvivella biseviata de Brgbisson and Godey, Mem. Soc. Acad. Falaise, 1:53, pi. 7. 1835. Coll: 1552a. Suvivella biseviata var. bifvons (Ehr.) Hust. Naviaula bifvons Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1832:259. 1832. Suvivella bifvons (Ehr.) Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:388, pi. 3(5), fig. 5. 1843. Suvivella biseviata var. bifvons Hustedt in: Pascher, Sussw.-Fl. Mittel- europas, Heft 10, Aufl. 2, p. 433, fig. 833. 1930. 652 SUBISEVB TCT NO OF STATIONS 16C973 CH 1876 0.02362 ) ( 3541 Ch 1FE1881 0.02935 ) ( 1565 GS13 50C1967 C. 00507 ) Suvivella elegans Ehr. Suvivella elegans Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:424. 1843. Coll: 1407a. Suvivella guatemalensis Ehr. Suvivella guatemalensis Ehrenberg, Mikrogeologie, pi. 33(6), fig. 7. 1854. Coll: 1552a. Suvivella lineavis Wm. Smith Suvivella lineavis Wm. Smith, Syn. British Diat., Vol. 1, p. 31, pi. 8, fig. 58z. 1853. 6 6 C SI S P _JCA____I_ NCL-CF _S.T A T I C N S 1 1-14C7 SM 2 14MY1<;*7 C.CC597 ) I Suvivella lineavis var. oonstviata (Ehr.) Grun. Naviaula ? oonstviata Ehrenberg, Infusionsthierchen, p. 188, pi. 21, fig. 17. 1838. Suvivella aonstviota (Ehr.) Ehrenberg, Mikrogeologie, pi. 14, fig. 37. 1854. Suvivella lineavis var. oonstviata (Ehr.) Grunow, Verh. Zool.-Bot. Ges. Wien, 12:455. 1862. 653 SULINEVC TOT NC CF STATIONS 16SE1964 0.0C393 ) I Suvivella lineavis var. helvetica (Brun) Meist. Suvivella helvetica Brun, Diat. Alpes et Jura, p. 100, pi. 2, fig. 4. 1880. Suvivella lineavis var. helvetica (Brun) Meister, Beitr. Kryptog -Fl Schweiz, 4(1):223, pi. 41, fig. 6. 1913. 654 SULINEVH TCT NC OF STATIONS 7 ' 35*1 CH 1FE1881 0.0C978 ) 146921 Ch 23NC1945 C. 00065 1 (46906 CH MY1947 r 0C133 ) t.4.692.2 XH 2J.AUU.41.__0 ..000.48..) I. IA46 t_7 2-LAJ_L%7__0JMli__L__(_L3_88 GS_U.____L2HYJJ96J___C^0C_603 ) I 1407 SM 2 14. Y1967 0.00597 ) I 181 Suvivella ovata Kutz. Suvivella ovata Kiitzing, Bacill., p. 62, pi. 7, figs. 1-4. 1844. 655 SUOVATA TOT NO Of STATIONS (46921 - (46SJ.4_ CH r.H 23NC1945 „ .1SAP.IS46. 0.00388 1 (46S17 .. (UMMJ. _146924_ CH r.H 12JA1946 10HY1946 0.00194 I 0.00282 ) (46915 (46923 CH CH 20FE1946 22N01946 C.0C569 1 0.00437 1 (46920 (4A01? CH r.H 20DE1946 AP1947 0.00154 ) 0.02300 1 469C5 46S06 CH CH JA1947 MY1947 0.00613 1 0.00398 ) (469C9 (46919 CH CH HR1947 5JN1947 C. 07741 ) ' C. 00455 1 146907 (46764_ CH EY. JL1947 17JL1937 O.C0690 ) 0.02417 ) 46S22 46744 CH EV 21AU1947 60C1937 0.00145 I 0.00488 ) (46758 ( 1226 EV C 7 5JN1937 16MY1964 C.0C357 ) 0.00381 1 ( 1228 I 123.8- 0 __D_ 2 3 14MY1964 UJN1964 0.0C195 ) O.0C2O0 ) 1231 1240 E 0 3 6 16MY1964 10JN1964 0.00245 ) 0.00307 ) ( 1232 ( 1242 E E 5 3 16HY1964 13JN1964 C.C1044 ) C.CC150 ) ( 1244 1 1?5? F r,1 1 1 UJN1964 16JL1964 0.00219 ) 0.0C279 ) 1245 1256 F E 2 2 11JN1964 14JL1964 0.00346 ) 0.00183 1 ( 1246 ( 1257 F E 3 3 11JM964 14JL1964 0.00598 ) C.0C239 ) ( 1258 1 127? F C« 1 I 6JL1964 10SE1964 0.00236 ) 0.C041O ) 1259 1285 f f 2 1 6JL1964 15SE1964 C. 00310 ) C. 00582 ) ( 1268 ( 1300 E E 2 3 15AU1964 130C1964 0.00547 ) 0.0C358 ) ( 1341 1 1171 A r. E OS 3 3 5 6 19AP1967 4MY1967 28MY1967 10MYI967 0.00108 ) 0.00462 ) 1343 1375 A E 6 3 19AP1967 7HY1967 C. 00069 ) 0.00241 ) ( 1346 ( 1413 C C 7 7 21AP1967 25HY1967 C.0C134 ) C.0C316 ) ( 1416 ( llfl? 0.00219 ) 0. 00278 1 1436 1384 E 2 8 15JN1967 I0MY1967 0.0O724 ) 0.00370 ) ( 1512 I 1391 E ESI 3 5 1SE1967 12WY1967 0.00393 ) C. 00479 ) ( 1522 ( 1427 SH LU 1 2 18SE1967 29PY1967 0.00182 ) 0.01211 ) 1529 1417 KM HO 1 2 20SE1967 22HY1967 0.01199 ) 0.00374 ) ( 1351 ( 1350 ft BH 2 2 21AP1S67 19AP1967 C.0C310 ) C. 00881 ) ( 1425 ( 1400 RA SB 2 2 25MY1967 6MY1967 0.01768 ) 0.01787 ) 1401 1354 MO GH 2 2 6HY1967 25AP1967 0. 01764 ) 0.00690 ) I 1402 ( 1403 TR CA 2 2 6HY1967 10HY1967 C. 02707 ) 0.03923 I ( 1404 1 1424 HO KN 2 2 10HY1967 25MY1967 0.01270 ) 0.02665 1 1422 GA 2 23MY1967 0.00511 ) ( 1423 KA 2 25HY1967 C.0C856 ) Suvivella ovata var. pinnata (Wm. Smith) Hust. Suvivella pinnata Wm. Smith, Syn. British Diat., Vol. 1, p. 34, pi. 9, fig. 72. 1853. Suvivella ovata var. pinnata (Wm. Smith) Hustedt in: Pascher, Sussw.-Fl. Mitteleuropas, Heft 10, Aufl. 2, p. 442, fig. 865. 1930. 656 SICIVATVP TCT NC CF STATIONS 21 ( 3507 CH 19FE1881 0.01132 ) (46»C6 CH HY1947 0. 00265 ) (46919 CH 5JN1947 C.CC455 ) (46907 (46747 CH EV JL1947 1AU1937 0. 00049 ) 0.0C248 ) (46922 (46759 CH EV 21AU1947 19MY1938 0.00048 ) 0.00338 ) (46758 ( 1232 EV E 5 5JN1937 16MY1964 C.0OT13 ) C.CC174 I ( 1236 L1S56 C< 1 GS 3 8JN1964 30C1967 0.00175 ) 0.00521 1 ( 1245 ( 1417 F 2 HO 2 11JN1964 22MY1967 0.00346 ) 0.00374 ) ( 1452 ( 1350 E 2 BH 2 14JL1967 19AP1967 C.0C213 ) C.OC220 ) ( 1402 t 1405 TR 2 fiS 2 6PY1967 12fYl?67 0.01083 ) 0.00645 ) ( 1400 I 14C6 SB 2 GB 2 6HY1967 13MY1967 0.00596 ) 0.00809 ) ( 13 54 ( 1423 GH 2 kA 2 25AP1967 25MY1967 C:00345 ) C. 00856 ) Suvivella vobusta var. splendida (Ehr.) V. H. Navioula ? splendida Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1832:81. 1832. Suvivella splendida (Ehr.) Ehrenberg, Mikrogeologie, pi. 3(2), fig. 17. 1854. Suvivella vobusta var. splendida (Ehr.) Van Heurck, Syn. Diat. Belgique, p. 187. 1885. _b5J SHRflRI.-VS TCT NT TF STATICNS 2. I 3541 1FF18S1 0.CC978 ) ( 14C7 Sf 2 14PY1967 0.00597 1 ( Suvivella teneva var. newosa A. S. Suvivella teneva var. newosa A. Schmidt, Atlas Diat., pi. 23, figs. 15-17, 1875. Coll: #844. Suvivella tenuissima Hust. Suvivella tenuissima Hustedt inx A. Schmidt, Atlas Diat., pi. 299, fig. 15. 1913. .65A. S.UI£tUlL ( 1550 fR 1 „si/rims i 50C1967 C. 01239 I ( 182 Surirella sp. #3. Species incertae sedis 661 SUS°ECOC ..IX.IL.AC OF. STAT I.QNS. __.U..-_ (469?? CM 21AUL947 0.00145 ) (46758 EV 5JN1937 0.00357 ) (46764 EV 17JL1S37 C.C8864 ) (46757 (4675Q ... EV -,-EV NO 2 25JL1937 24SE1937 10MY1967 0.00963 ) 0.00471 ) 0.C127C ) (46747 (46744 ( 1423 EV EV MA 2 1AU1937 60C1937 0.01485 ) C.C0488 ) (46752 ( 1527 EV IR 1 15SE1937 20SE1967 C. 02177 ) C.0C629 ) ( 1404 25MY1967 0.00428 ) ( Genus Synedra Ehr. Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1830:40. 1832. Synedra aous Kutz. Synedra aous Kutzing, Bacill., p. 68, pi. 15, fig. 7. 1844. Cells in girdle view elongate, rectangular with parallel mens from Lake Michigan 90-200y long, 4-6]i broad at the wides lanceolate, gradually tapering to rounded or subcapitate ends pendicular to the mid-line of the valve throughout, very fine about 12-14 in lOu. Axial area narrow, linear, very slightly central portion of the valve. A distinct, quadrate, central present in this species. It lacks any regular ornamentation contains what appearsto be incompletely developed striae, esp valve margins. sides. Speci- t point. Valves Striae per- ly cross-lineate, expanded in the area is always but occasionally ecially near the This species is occasional in our collections. Its primary habitat is apparently in the periphyton, but, like many other members of the genus, it is able to maintain its existence in the phytoplankton. 662 SYACUS TCT KC CF STATIONS 50 (46921 CH (46922 LH. (46743 EV 23N01945 JUMiX3iiJ- 0.0C065 I _S.«&0jE2IJL_ (46S24 (46758 CH EV 10MY1946 5JN1937 C.C0071 ) 0.66329 ) (46916 (46771 CH EV 4MY1947 I1JN1937 C.CC068 ) C.C1664 ) (46757, FU EV (46 744 (44.(56 . I 1237 _(. 1.2A4 . ( 1285 -L132Q ( 1395 (15.22 ( 1428 MU 2 (. 135.0 B±L.2_ ( 1354 GH 2 ( 1404 HO 2 25JU937 n. 0119*3 I C 2 E_l_ . F 1 _E__4_ 60C193 7 27AP193B 8JN1964 11JN1964 15SE1964 7N01964 0.00488 ) 0.0C168 ) 0.01031 ) JUflCUO )_ (46749 (46761 EV EV 1AU1937 0.O0248 I (46765 12HR1938 27MY1938 GS19 ~bh...1- ( .1406 GB 2 13MY1967 -l£ii.L96jL. 2SMY1967 --19AP1967 25AP1967 10MY1967 0.00582 ) Q.CC620 ) ( 1241 0.00117 ) 0.00904 ) 0.00220 ) _ ( 1297 ( 1367 E 2 C 1 ( 1396 ( 1550 D 6 GS11 13JN1964 16JL1964 0.01214 ) C.002T3 ) (46762 ( 1234 140C1964 12FY1967 0.00148 ) 0.00279 ) 0.00381 I 0.00396 ) ( 1243 < 1270 EV _B_1_ 30AU1S37 C.CUIS ) 16MR1938 18JN1964 E 6 JL.L 13MY1967 0.00863 ) 0.06352 1 ( 1426 -<-14QJ_ GS20 KR 1 MS 2 W0 2 13MY1967 50C1967 C. 00074 ) 0.04956 1 ( 1304 ( 1394 F 1 C-S18 13JN1964 10AU1964 ( 1429 ( 1405 ML 2 ES 2 29MY1967 6MY1967 ( 1575 ( 1553 GS28 SB 1 HOC 1964 13HV1967 C. 02206 ) C. 00562 l_ C.CC418 ) 0.CC494 1 C.0C172 ) C. 23097 ) 0.02352. _>_ 29MY1967 12HY1967 C. 01062 I 0.01290 ) 23MY1967 C. 0102:2 ) ( 1417 A J4C0 ( 1403 ( 1407 60C1967 60C1967 0. 00129 } C.C2203 ) HO 2 ._SB_2_ 22MY1967 6HY1967 CA 2 SH 2 ( 10MY1967 14MY1967 0.01122 I C, 14892 ) C. 05231 ) C. 01791 1 Synedra amphio&ghxiia Kutz. Synedra amphloeiphala Kutzing, Bacill., p. 64, pi. 3, fig. 12. 1844. Cells in girdle view elongate, sub-rectangular, narrowed toward the ends. Specimens from Lake Michigan 15-50y long, 2-4u broad. Valves linear to, especially in the smaller individuals, linear-lanceolate with distinctly pro- tracted sub-capitate to capitate apices. Striae finely structured, very finely cross-lineate, parallel throughout the length of the valve, 13-16 in lOy. Axial area narrow, slightly lanceolate. Specimens frpm Lake Michigan lack a central area. This species apparently finds its primary habitat in the periphyton but is able to exist in the plankton. Most of our specimens come from the northern portion of the lake. 183 664 SYAHPHVA TCT NO OF STATIONS 19AP1967 0.00069 ) Synedra amphicephala var. austrica (Grun.) Hust. Synedra austrica Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 39, figs, 16a-b. 1881. Synedra amphicephala var. austrica (Grun.) Hustedt in: Rabenhorst, Kryptog.-Fl. Deutschland, 7(2)2:206, figs. 696b-d. 1932. Valves lanceolate with capitate ends. Striae 12-15 in lOy. Morphology and ornamentation of the frustule otherwise essentially similar to the nomi- nate variety. More common than the nominate variety in our collections, this entity apparently is better adapted to planktonic existence. 252 FRGP.ACI0 TCT ND OF STATIONS 20 (46917 X.46916. CH r.H EV FV 12JA1946 4HY1947 5JM937 _ ..JL7Jil53.7. 0.00055 ) 0.00238 ) 0.12481 ) 0.05641 ) 0.04354 ) 0.01951 ) (46924 (46919 CF CH 10MY1946 5JN1947 0.00423 ) 0.21699 1 (46923 (46922 CH CH 22NC1946 21AU1947 C. 01748 ) C.0C921 ) (46758 ( 46764. _ (46743 (46763 EV EV 20JN1937 23AU1937 C. 01713 ) C. 16234 ) (46770 (46765 EV EV 9JL1937 30AU1937 C. 01193 1 C.C2231 ) (46752 (46744 EV EV 15SE1937 60C1937 (46760 ( 1258 EV F 1 22SE1937 6JL1964 0.00492 ) C. 01652 ) (46750 ( 1259 EV F 2 24SE1937 6JL1964 C.C2828 ) C.0C930 ) 1 1260 F 3 6JL1964 0.00382 I ( 1549 M0 1 40C1967 0.04111 ) ( Synedra capitata Ehr. Synedra capitata Ehrenberg, Poggendr. Ann. Phys., Ser. 2, 38:221, pi. 3, fig, 3(1). 1836. Cells in girdle view linear with slightly expanded apices. Specimens from Lake Michigan 150-420u long, 7-10u broad. Valves linear with much expanded cuneately narrowed apices. Striae coarse, distinctly punctate-line- ate, parallel throughout most of the length of the valve, becoming radiate in the expanded apices, 7-10 in 10y. Axial area narrow but distinct, linear throughout. Central area often entirely lacking, when present rather small, quadrate, not reaching the margins of the valve. A. distinct "jelly pore" is visible at the ends of the valve. This very distinctive species is restricted to the periphyton and only occasional accidental occurrences have been noted in our collections. 666 SVCAPITA TCT NO OF STATIONS (60973 < 1396 CH 1876 13MY1967 0.02362 ) -0.00074_JL ( 3540 _<__.1350_„ CH BH 2 11MY1879 19AP1967 0.00466 ) 0.00881 1 (46916 A Synedra cyctopum Brutschy Synedra cyctopum Brutschy, Internat. Rev. Hydrobiol., 10:284, fig. 11. 1922. Living cells attached at one end, usually to planktonic microcrustaceans. Usually several cells are attached at a common point, forming a bushy colony. Valves arcuate, narrowing to rostrate to sub-capitate ends. Specimens from Lake Michigan 30-65u long, 3-4u broad. Striae finely structured, parallel throughout the length of the valve, 14-18 in lOu. Axial area narrow, linear, often slightly displaced toward the concave margin of the valve. Central area may be either present or absent, when present it is quite small, elliptical in shape and does not extend to the margins of the valve. 184 The secondarily planktonic, epizoic growth habit of this species appears to be obligate. It is most common on copepods although it is occasionally observed on other zooplankters . . 668- SYCYCLOP TOT NO GF STATIONS _6J.US.64 Q_,0M9JL_L. „S_JL6_ 50C1967 0.00144 ) Synedra delioatissima Wm. Smith Synedra delioatissima Wm. Smith, Syn. British Diat. fig. 94. 1853. vol. 1, pi. 12, Cells in girdle view linear, narrowing slightly toward the ends. Valves elongate-lanceolate with rounded to subcapitate ends. Specimens from Lake Michigan 100-335u long, 3-4u broad. Striae parallel throughout, 14-16 in lOu . Axial area narrow, filiform, central area variable, usually elongate-ellipti- cal, not reaching the valve margins, in some specimens much reduced, only marked by a few irregular striae at the center of the valve. 705 SYSPECOH ' rci NO CF STATICNS 11 (46916 CH (46744 EV ( 1270 F I ( 1350 BH Z 4MY1947 60C1937 10AU1964 19AP1967 0.00034 ) 0.0C488 ) 0.00817 ) 0.00661 ) (46919 ( 1244 CH F 1 5JN1947 11JN1964 2.36719 I 0.00219 ) (46922 ( 1246 CH F 3 21AU1947 11JN1964 C.0C145 ) C.C1195 ) 1 1348 ( 14C3 E 5 CA 2 23AP1967 10MY1967 0.00137 ) 0.02615 ) ( 1426 ( CS 2 29HY1967 C. 01050 ) Synedra delioatissima var. angustissima Grun. Synedra deliaatissima var. angustissima Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 39, fig. 10. 1881. Synedra aaus var. angustissima (Grun.) Van Heurck, Syn. Diat. Belgique, p. 151. 1885. Cells in girdle view linear, narrowed toward the ends. Valves elongate- lanceolate with subcapitate ends. Specimens from Lake Michigan 200-380u long, 4-5u broad. Striae parallel throughout, 12-14 in lOu. Axial area narrow, filiform, central area elongate, rectangular, usually reaching the margins of the valves. In some specimens the central area is irregularly bordered and tends to become more or less elliptical. Both of these entities are euplanktonic in Lake Michigan. As is true of most members of the genus, certain morphologic characteristics, particu- larly the form of the central area, tends to be variable. Isolated speci- mens in the intermediate size range are difficult to distinguish, but large populations appear to fall into two discrete series. (46756 6V _(_46_764 E.V ( 1225 C 6 _1_12__ D_2 663 SYACUSVA TOT KC CF STATICNS 315 (60973 A _35QJ CH J£H_ 1876 19FE1881 0.51960 ) 0.14716 ) ( 3540 (46910 CH CH 11MY1875 0C1945 0.07921 1 1.13602 ) ( 3541 (46921 CH CH 1FE1881 23N01945 C. 39127 ) 0.27356 ) (46908 CH CH CH CH CE1945 19AP1946 200E1946 API 947 0. 09063 ) 0.10037 1 0.20027 1 1.03484 ) (46517 (46924 (469C5 (46916 CH CH CH CH 12JA1946 10MY1946 0.21625 1 0.89381 ) (46915 (46923 CH CH 20FE1946 22N01946 C.3C729 ) 0.780.26 ) (46920 14691? JA1947 4HY1947 C. 06 128 1 1.32323 ) (46909 (46906 CH CH HR1947 MY1947 C. 12750 ) 2.37270 » (46919 14.6758 CH FV 5JN1947 5JN1937 0.69043 ) 0.39940 ) (46513 (46771 CH EV 6AU1947 11JN1937 C. 16735 1 0.57534 ) (46922 (46743 CH EV 21AU1947 20JN1937 0.18901 ) C. 06851 ) (46745 146757 EV FV 3JL1937 25.11.1937 0.27168 ) 0.24553 I (46770 (46747 EV EV 9JL1937 1AU1937 0.02982 ) 0.55450 ) (46764 (46763 EV EV 17JL1937 23AU1937 0. 16116 ) C. 14205 ) (46765 146760 EV FV 30AU1937 22SE1937 0.22309 ) 0.27574 ) (46769 (46750 EV EV 7SE1937 24SE1937 0.54277 ) 0.19324 1 (46752 (46744 EV EV 15SE1937 60C1937 C. 06530 ) C. 46820 1 (46748 (4676? EV EV 130C1937 18MR1938 0.02135 1 0.72783 ) (46767 (46751 EV EV 270C1937 30MR1938 0.10444 ) 0.10049 1 (46768 (46772 EV EV 16MR1938 18AP1938 C. 23519 ) C. 12065 ) 27AP1938 140E1938 0.2C485 I _Q_«Z.C596-JL. 15MY1964 14MYL964_. 1.92081 ) -__3.62_2.JL_ (46759 ________ ( 1226 __J_Z___ EV B 3 19KY1938 18HY1964 0.37812 ) 0.28440 I (46761 EV ( 1224 B 4 C 7 .__. 5 16HY1964 14HY1964 2.92998 ) 2.96039 I ( 1227 ( 1230 C« 2 E 2 27MY1938 18KY1964 13HY1964 16KY1964 0.56143 ) C. 45878 ) 0.42220 } 1.86694 ) 185 ( 1231 1 1734 E R 3 3 16MY1964 1R.IN1964 2.62694 ) (1.17431 ) ( 1232 ( 1235 E r 5 7 16HY1964 16JN1964 1.70441 ) C. 16663 ) ( 1233 ( 1439 B B 3 6 5JN2964 5JN1964 C. 22386 ) 1.C3496 ) ( 1236 1 1239 c D 1 4_ 8JN1964 11JN1964 0.30631 I 0.17871 ) ( 1237 < 124C c c 2 6 8JN1964 10JN1964 C. 20624 ) 0.71482 ) ( 1238 ( 1241 0 E 3 2 11JN1964 13JN1964 1.96000 ) 1.24198 ) 1 1242 1 1745 E F 3 7 13J N1964 11.IN1964 1.39975 ) 0.59125 1 < 1243 1 1246 E F 6 3 13JM964 11JN1964 2.63092 ) C. 92 034 ) ( 1244 ( 1247 F 8 1 3 11JN196 . 14JL1964 0.16776 ) C.C2561 ) ( 1248 ( 1249 B _L 3 3 24JL1964 8JL1964 0.05517 1 0_05975 ) ( 1440 ( 1250 B r. 6 6 11JL1964 10JL1964 C. 28375 ) 0.25899 ) ( 1441 ( 1251 B C 6 7 24JL1964 16 JL 1964 C. 46257 ) 0.22307 ) ( 1252 1 1 ?•>•> C n F R 1 5_ 1 3 16JL1964 .L5_l____L64 6JL1964 2AU1964 0.04184 ) 0.23099 1 0.90851 ) 0.00785 1 ( 1253 ( 1256 C E 2 2 16JU964 14JL1964 0.37657 1 C. 85367 ) ( 12 54 ( 1257 D E 2 3 15JL1964 14JL1964 C. 98449 ) 1.11497 1 ( 1258 1 1761 ( 1259 ( 1262 F 8 2 3 6JL1964 17AU1964 1.C8453 ) 0.01470 ) ( 1260 ( 1442 F B 3 6 6JL1S64 2AU1964 1.51078 ) 0.28659 ) 1 1443 1 1765 B 6 7 16AU1964 10AU1964 0.01186 ) 0.07601 ) ( 1263 1 1266 C 0 7 3 15AU1964 18AU1964 0. 00400 ) 0.44549 ) ( 1264 ( 1267 C 0 1 6 10AU1964 18AU1964 0.02124 ) C. 01946 1 ( 1268 1 1444 E B_ 2 6 15AU1964 19SE1964 1.05318 ) 0.21219 ) ( 1269 ( 1271 E C 3 7 15AU1964 22SE1964 C. 29600 ) C. 01306 ) ( 1270 ( 1272 F C 1 1 10AU1964 10SE1964 O.C-441 ) C. 00821 ) ( 12T3 1 1. 76 c» r> 2 3 1CSE1964 18SE1964 C.C6990 ) 1.13992 ) ( 1274 ( 1277 0 0 1 4 17SE1964 18SE1964 C. 06100 ) 0.09295 ) ( 1275 ( 1278 0 0 2 6 17SE1964 18SE1964 C. 11612 I C. 53807 ) < 1279 1 1?fi? E _J_ 1 4 16SE1964 16SE1964 0.20811 1 0.22161 ) ( 1280 ( 1283 E E 2 5 16SE1964 16SE1964 0.37443 ) 0.77847 ) ( 1281 ( 1284 E E 3 6 16SE1964 17SE1964 C. 29039 I 1.22327 ) < 1285 1 1788 F R c« n 1 3 1 7 15SE1964 15nC1964 2.44598 1 0.02177 ) ( 1286 ( 1445 F B 2 6 15SE1964 140C1964 1.02890 ) 0. 20548 ) 1 1287 ( 1289 F C 3 7 15SE1964 140C1964 C. 70056 ) 0.27703 1 ( 1290 1 179. 160C1964 1 snr. 1 964 0.07580 ) (1.17735 1 ( 1291 ( 1294 C« a 2 160CX964 15fir.l964 0.01468 ) _. 53071 1 ( 1292 ( 1295 D D 1 4 15QC1964 I50C1964 C.C1491 ) C. 10703 ) ( 1296 i__Z____. ( 1302 ( ...li_____ ( 1308 ( 1311 D 5 E 2_ 140C1964 120C1964 0.05902 ) _________76____. ( 1297 ( 130C D 6 ______ 140C1964 13GC1964 0.23990 ) 2.00465 I ( 1298 I 1301 E 1 ______ E 5 F 7 C 7 n l 130C1964 ____.CC_.2____. 6N01964 ■ l._1964 1.41712 ) ____-__a9-e.__J. 0.02737 ) 0.23477 ) ( 1303 _____.3__6_ E 6 ______ ( 1309 ( 1312 C 1 0 2 130C1964 _n.0CjL_964_. 10NQ1964 8N01964 0.78361 ) 1.16414 ) ( 1304 i 13C7 0.20421 ) 0.13037 1 ( 1310 1 1313 F 1 B 6_ C 2 C 3 C. 19657 ) C. 74185 ) C. 43218 ) _C_.05051_ ) C. 29252 ) C. 16988 1 ( 1314 t l_il7.._ ( 1320 (. 1323_ I 1336 I 1339 9N01964 ____.C._____4 _ E 4 ._J___1__ C 3 C 5 7NG1964 ...__6__il564_ 27JA1 567 28PR1967 0.67178 ) -C_13 40_3__. 0.86867 ) C. 6494 8 J 0.67395 ) 2.18245 ) ( 1315 . L.13_18_. ( 1321 ( 1324 I 1337 < 1340 0 5 -£____ 5 _E__2_ C 3 C 7 9N01964 7N01964 7N01964 6N01964_ 2MR1 967 28HR1967 0.57780 ) C. 22639 I 1.65358 ) C. 97827 _)_ 2.81309 ) 1.59542 ) ( 1316 _t__J_3_19 ( 1322 _( 1325 I 1338 ( 1341 9NG1964 ___7NC1964_ 7NG196 4 _6NG1564 28MR1967 19AP1967 1.C5772 ) C. 79596 ) 1.51631 ) 1.41061 ) 2.2 8222 ) 1.21497 ) ( 1342 < 1345 ( 1348 1. 137.0. ( 1373 ' 137ft A 4 19AP1967 -2.5AP1967 23AP1967 ___3MY___6_7 5MY1967 6MY1967 3.28443 ) _3. 45789 I 2.36600 ) 0..0023(L.)_. 0.49917 ) 2.36114 ) I 1343 ( 1346 ( 1368 I 1371 ( 1374 I—14C8 A 6 ______ A 3 C 3 E 2 A 3 19AP1967 _21AP1967_ 0.24316 ) _ 4_._p_5_J_U __>. 4NY1967 4HY1967 7MY1967 23MY1967 3.95853 ) 0.07.849 J_ 3.76569 ) 2.92447 ) ( 1344 ( 1347 (1369 ( 1372 ( 13 75 ( 1409 25AP1967 23AP1967 4MY1967 _5MY1967^ 7. Y 1967 23MY1967 2.Ce454 ) 3.C3390 ) C.1C436 ) 1.24131 ) C. 78443 ) 2.63643 1 ( 1410 ( 1413 ... 1 1416 I 1431. ( 1436 ' 1446 A 6 ...C_7_. E 5 _C.iL. E 2 _____ 24NY1967 ________ .6_7. 28MY1967 _.1.7_JI_1..96_7.. 15JN1967 11JL1967 3.15742 ) _.l_.9_90P8_.)... 2.96967 ) _6..13848 I 6.41916 ) 1.94217 ) ( 1411 J 1414 _ ( 1431 ( 14 3_4_ ( 1437 < 1447 C 3 E_J_ i 3 C_5 E 3 A 4 31. Y1967 28HY1967 12JN1967 17JN1967 2.44123 ) 3.__4_4584_)_ 3.36277 ) _U__3 ________ ( 1412 ( 14.15 ( 1432 I 1435 15JN1967 UJ11967 4.77485 ) 2.39989 I ( 1438 ( 1448 C 5 E 3__ A 4 C 7 E 5 A 6 31MY1967 28MY1967 13JN1567 13JM967 14JN1967 1CJ-1.67 2.55072 ) 2.3C697 ) 3.93379 ) 6.18824 ) 1.69208 ) C. 49514 ) ( 1449 I .1452 ( 1504 ( 1509 I 1512 I 1533 C 3 _.E..2_ A 3 ________ E 3 A 4 16JL1967 14J-.1S67 2 8AU196 7 ._.2_SE.1967 1SE1967 19SE1967 12.12885 1 3.77656 ) 0.69127 I .. 2.35187 I 7.69593 I 0.01857 ) ( 1450 J 1453. ( 1505 ( 1510 ( 1513 ( 1534 C 5 E_3 C_7_ E 5 A 6 16JL1967 _15JL1?6_7 28AU1967 _29AU1967 3i"AUi967 19SE1967 4.79863 ) _4_^00880_ I 0.23189 ) C. 44262. I 3.31.08 ) C. 10858 ) ( 1451 ( 1454 ( 15C6 I 1511 1 1532 ( 1535 16J11967 15JL1967 29AU1967 1SE1S67 18SE1967 20SE1967 1.46845 ) C. 35007 ) C.0C523 I 1.86021 I C.C4599 ) C.C1288 1 i 1536 1 1539 ( 1542 I 1378 ( 1381 I 1384 E 2 _C_3_ E 3 GS...2... OS 5 GS 8 24SE1967 _4_GC1.96 7. 110C1967 9. Y1967 lo. Y1967 10WY1967 3.81742 ) 0_.O050 3 I 2.6 1391 ) _C. 95875 ) 2.11325 ) 1.12025 ) ( 1537 < 1540 ( 1543 I 1379 ( 1382 ( 1385 E 3 _ C 5_ E 5 GS 3 GS 6 GS 9 24SE1967 _40C196_7_ 100C1967 _ 9. Y1967 10HY1967 10. Y1967 4.42508 ) C.0A489. )_ 0.63209 i _0.4673_2_)_ ( 1538 _1 1541 ( 1377 ( 1380 E 5 _E_2 GS 1 OS 4 0.11380 ) 1.09722 1 I 1383 ( 1386 GS 7 GS1C 23SE1967 11CC1967 .'MYi.67 9. Y1967 16MY1967 12MY1967 2.32006 ) C.J8205 I C. 16228 j _2. 66685 ) i. 2 1632 I C. 25280 1 ( 1387 1 1390 ( 1393 1 1396 ( 1554 ' '557 GS11 . ______ GS17 GS20. GS 1 g_ 4 12MY1967 _12. Y19.67 13MY1967 J.3MY1967 3DC1967 3nf.l967 0.87136 1 0.19965 ) C. 70129 ) 0,065.11 ) 2.15612 ) 0.57922 1 ( 1388 I 1391_. ( 1394 ( 13_97 I 1555 I 1558 GS12 GS_15_ GS18 GSJ1_ GS 2 GS 5 12HY1967 12MY1967 13MY1967 1_3MY1J67__ 30C_967 4CC1967 0. 05430 ) 0.17463_J_ !. 68576 I C._L3081____ C. 38489 ) 0.27747 ) ( 13 89 L_1392 ( 1395 _(_ 1398_ ( 1556 ( 1559 GS13 _C-SJ6 GS 19 _gS22_ GS 3 GS 7 12MY1967 12HY1967^ 13~M.i".6 7 14HY1967 3CC1967 40C1967 C. 09282 ) C. 75816 ) C. 27480 ) 1.59395 ) C. 07822 ) C. 52808 1 < 1560 (1563. ( 1566 I 1569. ( 1572 I 1575 GS 8 GiLLL. GS14 GS17... GS20 GS28 40C1967 _._5aC_L9__7_ 50C1967 50C1967 60C1967 60C1967 0.45813 I 0._5 58_86 ) 0.10457 ) C.90081_| 0.0C090 ) 0.15353 ) ( 1561 ( 1564_ ( 1567 ( 1E7C ( 1573 I 1544 GS 9 __G.S12__ GS15 GS18 GS21 HU 1 4GC1567 ...50Ci967_ 1.09174 I 0.01152 ) 5CC1967 _50C1967_ 6CC1567 20C1967 C. 18894 ) C. 12892 ) ( 1562 ( 1565 ( 1568 ( 1571 GS10 GS13 GS16 _JiS19__ 0.03920 ) 0.01191 I ( 1574 < 1547 GS22 . S 1 50.1967 _50_C_1967 50C1967 6GC1967 6GC1.67 20C1967 C. 69078 ) C.C3042 ) C. 67243 ) CjCSliL) C. 44584 j C. 03194 ) ( 1546 ( 1522 ( 1528 ( 1531 ( 1551 ' '*5 . LU 1 ._BJ___L SB 1 ..GH .1 ES 1 .G 2GC1567 L8SE1_967_ 20SE1967 _____.6.L9_i7__ 50C1967 -CC1967 0. 03001 ) 1 .94380 >_ 0.08663 ) 1.06509 ) 0.44732 ) 0.13954 1 ( 1520 J_l_526 ( 152 9 _(_!5_8_ ( 1552 ( 1428 HC MIL KM 1 _______ 18SE1.67 20SE1967 C. 03772 I 0.05120 ) ( 1521 ( 1527 SH TR 18SE1967 20SE1967 2CSE1967 30C1967 0.14390 ) 0.05088 1 ( 1530 ( 1549 FR 1 .0 1 24SE1967 40C1567 C.C6347 ) _0._C5660 J C. 14001 ) 1.60340 ) SM 1 MU 2 60C1967 29HY1967 0.66689 ) 0.35253 ) ( 1550 ( 1426 . R 1 . S 2 5CC1967 29MY1967 C. 19824 ) 14.89764 ) ( 1351 C 1418. ( 1399 I 1400_ I 1354 I 14(14 .1 _____ 21AP1967 77HY1967 2.54771 ) __L_fi____)XJ_ ( 1427 I 1350 PW 2 SR 7 5NY1967 6MY1967 3.40724 ) 3.36550 ) ( 1401 ( 1352 LU 2 ____L_2__ 29PY1967 19AP1967 6.45278 ) 1.55063 ) ( 1417 ___________ HO _____ 22. Y1567 25HY1967 6HY1967 21AP1967 2.06961 ) 1.92407 ) ( 1402 ( 1353 IR 2 FR 2 6FY1967 23AP1567 2.23194 I 3.58058 ) C. 92593 1.46624 1 12MYI967 0.65144 I 14NY1967 C. 69863 1 ( 1349 1 1420 CI 2 ________ 19AP1967 73MY1967 0.88009 ) 3.70091 I I 1406 ( 1421 GB 2 ________ 13MY1967 23MY1967 0.07818 ) 4.25052 ) ( 1419 ( 1422 BU 2 _______ 23MY1967 23WY1967 5.07140 ) ________________ 25NY1967 5.82201 ! ( 1430 Synedra demerarae Grun. Synedra ? demerarae Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 41, fig. 29. 1881. Cells in girdle view linear, slightly narrowed toward the ends. Cells sometimes attached by the valve faces into short, band-shaped colonies. 186 Valves lanceolate with capitate ends. Specimens from Lake Michigan 20-90y long, 2.5- _u broad. Axial area highly variable, in the smaller individuals wide and more or less lanceolate, in the larger individuals narrow and fili- form. Central area entirely lacking in most specimens, in some of the larger individuals marked by a few partially developed striae near the center of the valve. Striae appearing very coarse and well defined 8-12, usually 8-10, in lOu. One of the most distinctive features of this taxon is the al- ternate placement of the striae on the two sides of the axial area rather than being opposite one another as is the case in most species of the genus. The identity of the specimens from Lake Michigan assigned to this taxon is somewhat questionable. The striae are not marginal as in Grunow's ori- ginal illustration except in the very small individuals. The size range of our specimens is also considerably greater than that reported by other authors (Patrick and Reimer 1966). There is also some question as to the correct generic classification in that our specimens sometimes occur in colonies similar to T?vag'i1ca?ia., As has been pointed out by numerous authorities, colony formation is an extremely tenuis taxonomic characteristic in diatoms and a number of the smaller taxa are more or less arbitrarily assigned to either Synedra or Fragilaria although they may adopt the growth habit "characteris- tic" of either genus . ( 1342 ___45_ ( 1348 J_1370 ( 1373 ( 1376 A 4 C 5 E 5 __A__6__ C 7 E 5 67(1 ..YnECERC TCT NC CF ST.TI GNS 153 r.H CH _1_____. 19FE1881 0F1945 0.04724 ) 0.20376 ) 0.02014 1 I 3540 XH 11MY1879 0.10716 ) ( 3541 CH 1FE1881 C.1C76C ) ( 3507 (46910 (46917 CH CH 0C1945 12JA1946 0.00983 1 0.00943 I (46921 (46915 CH CH 23N01945 20FE194* 0.02005 ) C.C6829 1 (46914 CH r.H 19AP1946 20DE1946 0.01281 ) 0.08011 ) (46924 (469C5 CH CH 10HY1946 JA1947 0.05573 ) C. 03922 ) (46923 (469C9 CH CH 22N01946 KR1947 0.22293 I C. 07286 ) (46912 CH AP1947 5JN1947 0.03449 ) 0.01214 ) (46916 (469C7 CH CH 4HY1947 JL1947 0.00305 ) C. 01874 ) (46906 (46922 CH CH MY1947 21AU1947 0.01261 ) C. 00436 1 (46758 EV 5JN1937 9JL1937 0.08915 ) 0.03578 ) (46743 (46764 EV EV 20JN1937 17JL1937 0.03426 ) 0.16116 ) (46745 (46757 EV EV 3JL1937 25JL1937 C. 02090 ) C. 01444 ) (46747 EV FV 1AU1937 15SE1937 0.19803 I 0.08707 ) (46763 (46760 EV EV 23AU1937 22SE1937 0.06088 I 0.33483 ) (46765 (46750 EV EV 30AU1937 24SE1937 0.00558 1 C.0C943 ) (46744 EV 60C1937 16MR1938 0.02439 1 0.C882C 1 (46767 (46762 EV EV 27QC1937 18..R1S38 0.065T6 ) 0.02206 ) (46749 (46751 EV EV 12MR1936 30HR1938 C. 03641 ) 0.03350 ) (46772 !4A7f>! EV FV 18AP1938 27WY1 93R 0.01419 ) o.ocais l (46756 146766 EV FV 27AP1938 I4nei938 0.04533 1 0.09506 ) (46759 1 1224 EV B 4 19MY1938 18HY1964 C.0C338 ) C. 01568 1 ( 1225 L 1223 C D 6 5 15MY1964 14MY1964 0.01568 1 0.01903 ) ( 1227 ( 1230 C E 2 2 13MY1964 16MY1964 0.00768 I 0.00889 1 ( 1228 ( 1231 0 E 2 3 14MY1964 16MY1964 C. 01557 ) C.C2201 ) ( 1232 I 1240 E D 5 6 16MY1964 10JN1964 0.24349 ) 0.00153 ) ( 1236 ( 1241 C E 1 2 8JN1964 13JN1964 C. 00700 1 0.C0444 I ( 1239 ( 1242 0 E 4 3 11JIU964 13JN1964 0.01625 ) C.CC300 ) ( 1243 ( 1257 E F. 6 3 13JN1964 14JL1964 0.01462 ) 0.00239 ) ( 1244 ( 1258 F F 1 1 11JN1964 6JU964 0.00329 ) 0.01888 I ( 1256 ( 1260 E F 2 3 14JL1964 6J11964 C.0C366 ) 0.00382 ) ( 1280 < 1297 E _0_ 2 6 16SE1964 140C1964 0.00681 ) 0.01523 1 ( 1285 ( 1304 F F 1 1 15SE1964 110C1964 0.02330 ) C. 00494 ) ( 1292 ( 1305 D F 1 2 150C1964 11GC1964 C.0C373 ) C.0C173 1 ( 1306 _L__L32_l _ F E 3 5 110C1964 7N01964 0.00277 ) 0.00638 I ( 1316 ( 1322 □ E 6 6 9N01964 71.01964 0.00378 ) 0.04666 ) ( 1320 ( 1323 E F 4 1 7NG1964 6N01964 C.CC414 ) C.CC139 ) ( 1336 ( 1339 C C 3 5 27JA1967 28MP.1967 0.00578 ) 0.02182 ) ( 1337 ( 1340 C c 3 7 2MR1967 28MR1967 0.04997 ) C. 06036 ) ( 1338 I 1341 C A 3 3 28HR1967 19AP1967 C. 09256 1 C. 16706 ) 19AP1967 25AP1967 0.01444 ) 0.02924 ) ( 1343 ( 1346 A 6 C 7 19AP1967 21AP1967 C. 01042 ) C. 05074 ) ( 1344 ( 1347 23AP1967 3MY1967 0.19191 I 0.17033 ) ( 1368 ( 1371 5MY1967 6HY1967 0.11695 ) 0.78705 1 ( 1374 ( 14C8 _C_3 E 2 A 3 4MY1967 4HY1967 C. 17279 ) 0.04155 1 ( 1369 (1372 7MY1967 23MY1967 0.C4184 ) 0.07602 ) ( 1375 ( 1409 25AP1967 23AP1967 C.0C993 ) 0.C2276 I 4MY1967 5MY1967 7MY1967 23HY1967 C. 15755 ) X.C4611 ) C. 19972 j C.C6546 ) ( 1410 _<___1413_ ( 1416 __!___ ( 1437 ( 1453 A 6 C 7 E 5 _-__3_ E 3 E 3 24MY1967 _25M_Y1967 28MY1967 _JZ_.N19.67_ 15JN1967 15JL1967 0.03383 I __0_.14_5_3L__ 0.07654 ) _0 ..01938 ) 0. 00538 j 0.00758 ) ( 1411 L 1414„ ( 1431 ( _14_34_ C 3 E 2 31MY1967 28HY1967 C. 28720 ) 0.01343 ) ( 1412 ( 1415 C 5 _E_3_ 31MY1967 28MY1967 A 3 C 5 12JN1967 17JN1967 0.00515 ) 0.00897 I ( 1432 ( 1436 A 4 E 2 13JN1967 15JN1967 ( 1438 ( 15C6 E 5 A 6 14JN1967 29AU1967 0.06173 ) 0.00523 ) ( 1450 (1511 C 5 E 2 16JL1967 1SE1967 C. 02105 ) C.0C899 I C.C3576 ) 0.01447 ) C.CC381 ) C.0C307 . ( 1535 ( J377 ( 1380 ( 1383__ ( 1386 < 1389 ( 1392 _I_._13.95_ ( 1560 ___>21__ ( 1351 1 1400 C 7 ____LJ_ GS 4 ___________ GS10 GS13 GS16 GS19 GS 8 _______!__ Ml 2 ■SB 7 20SE1967 SKY1967 9MY1967 10MY1967 0.00322 ) 0.02771 I ( 1536 ( 1378 E 2 GS 2 24SE1967 9MY1967 0.15806 ) _0_, 0.4812.. .)_ 12KY1S67 12MY1967 0.08905 ) 0.01031 1 ( 1381 « L384_ ( 1387 ( 1390 GS 5 GS 8 GS11 GS14 10MY1967 10MY1967 12MY1967 12I_ "'6.25 760 P C. 02033 ) 0.13862 ) C. 01762 ) ( 1538 < 1379 E 5 GS 3 ( 1382 J 1 3 85 ( 1388 ( 1391 GS 6 GS 9 GS12 C-S15 23SE1967 9MY1967^ " ioiii. 1967 10MY1967 12MY1967 J2HY1967 C. 00552 ) C.25687 ) C. 13600 j C. 04003 I C.C2413 ) C. 18675 ) 12MY1967 _1_1_____ 0.04315 1 0.00587 ) ( 1393 1 1398 GS17 GS22 13HY1967 14KY1967 0.04657 I 0.00911 1 ( 1394 ( 1559 GS18 GS 7 40C1967 _18.SE.19_6 7 21AP196 7 6KY1967 0.00472 I 0._005_77_J_ 0.00621 ) 0.04170 ) ( 1561 _( _1_2_6_ ( 1417 ( 1352 GS 9 _________ 40C1967 20SE1967 0.00587 ) 0.01138 ) ( 1574 ( 1529 22MY1967 21AP1967 0.00374 I C.0171B ) ( 1402 ( 1423 GS22 KU 1 TR 2 hA 2 13. Y1967 40C1967 60C1967 2C.SE1967 6HY1967 25KY1967 C.C4816 ) C.CC350 1 C. 00288 J C.CU99 ) C.C6498 I C.0C856 ) 187 Synedra fitiformis Grim. Synedra fitiformis Grunow in: Cleve and Grunow, Svenska Vet.-Akad. Ny Foljd, 17(2) :106, pi. 6, fig. 116. 1880. Handl. Cells in girdle view very narrow, linear, occurring singly or in bushy colonies. Valves elongate- lanceolate with very fine, rounded, ends. Speci- mens from Lake Michigan 45-195u long, only l-2u broad. The frustule is very lightly silicified and the striae are very fine in structure and difficult to resolve. Striae more or less marginal, parallel throughout the length of the valve, 26-30 in lOu. Axial area relatively wide, indistinctly bor- dered. In the specimens from Lake Michigan a central area is entirely lacking. At the present time the taxonomy of the members of the genus Synedra that display extreme adaptations to planktonic existence is extremely con- fused. Many authors have considered many of these forms to be varieties of S. aous. Our observations do not support this view. The species most closely resembling the taxon discussed here are S. ostenfeldii, which is distinguished by its somewhat coarser structure and S. tenera, which is distinguished by its still finer structure and somewhat smaller size range. Synedra nana has been reported from Lake Michigan (Williams and Scott 1962) but their identi- fication was apparently based on descriptions and illustrations published by Hustedt (1931) which in no way resemble the original description and illus- tration of Meister (1912). 703 SYSPECOF TCI NO OF STATIONS 277 (60973 (46921 CH CH CH S3 1876 23N01945 0-23618 ) 0.02846 1 < 3541 (46917 CH CH 1FE1881 12JA1946 C. 00978 1 0.00194 ! (46910 (46915 CH CH 0C1945 20FE1946 C. 00109 1 0.28453 ) (46914 (46909 19AP1946 MR1947 0.01175 ) 0.02277 ) (46924 (46912 CH CH 10HY1946 AP1947 0.57354 ) 0.02300 ) (46923 (46916 CH CH 22NC1946 4MY1947 0.00874 ) 0.00543 1 (46906 (46913 CH ch MY1947 6AU1947 2.67468 ) 0.01046 I (46919 (46922 CH CH 5JN1947 21AU1947 0.78906 ) 0.02859 1 (46907 (46758 CH EV JL1947 5JN1937 C. 16026 ) 0.79880 ) (46771 _ (A6IA7 (46752 (46744 EV EV EV FV 11JN1937 1AU1937 15SE1937 60C1937 1.59764 I 0.04703 ) 0.04354 ) _0_t54623 ) (46743 (46765 (46760 (46748 EV EV EV EV 20JN1937 30AU1937 22SE1937 130C1937 C. 04710 ) 0.01673 ) 0.01477 ) C. 02135 ) (46764 (46769 (46750 (46767 EV EV EV EV 17JL1937 7SE1937 24SE1937 27CC1937 C. 01612 J C. 02171 ) C. 12726 ) C. 37136 ) (46749 (46751 EV EV 12MR1938 30MP.1938 0.02427 ) 0.01117 1 (46768 (46772 EV EV 16MR1938 18AP1938 0.02940 I C. 00710 1 (46762 (46756 EV EV 18MR1938 27AP1538 0.26467 ) C. 02015 ) (46759 ( 1224 EV 4 19MY1938 18MY1964 0.08440 1 0.CC392 ) (46761 ( 1225 EV C 6 27HY1938 15MY1964 C. 01090 ) 0.01176 1 (46766 ( 1226 EV C 7 140E1938 16MY1964 0.09506 1 C.CC761 ) ( 1227 C F B B 2 2 3 A 13MY1964 16MY1964 5JN2964 5JN1964 0.00548 I 0.02963 _L ( 1228 ( 1231 D E 2 3 14HY1964 16HY1964 0.01168 ) 0.01712 1 ( 1229 ( 1232 D E 5 5 14MY1964 16MY1964 0.C1692 ) C.CC348 ) ( 1233 1 1439 0.C2620 I 3.07692 ) ( 1234 ( 1236 B C> 3 1 18JN1964 8JN1964 0.23898 ) C.C0350 ) ( 1235 ( 1237 C C" 7 2 16JN1964 8JN1964 C.C5649 1 C. 47693 1 ( 1238 ( 1741 D F 3 2 11JN1964 13.IN1964 0.21600 ) _C„,.l-5968--L 0.00658 ) C. 04695 I 1 1239 1 1242 ( 1245 ( 1248 D E F 8 4 3 2 3 11JN1964 13JN1964 11JN1964 24JL1964 C. 00580 ) C. 01499 ) ( 1240 ( 1243 0 E 6 6 10JN1964 13JN1964 C. 29452 ) C. 36541 I ( 1244 ( 1247 F B B r. 1 3 6 7 11JN1964 14JL1964 24JL1964 16JL1964 0.02766 1 0.06897 ) ( 1246 ( 1440 F B 3 6 11JN1964 11JL1964 0.20917 ) 9.28621 ) ( 1441 1 1751 4.16309 ) 0.28681 ) ( 1249 ( 1252 C C 3 1 8JL1964 16JL1964 0.01358 1 0.01395 ) ( 1250 ( 1253 C C* 6 2 10JL1964 16JL1564 3.59712 ) C. 31952 ) ( 1254 ( 1257 D F F B 2 3 3 6 15JL1964 14JL1964 6JL1964 ....16AU1964 . 10AU1964 15AU1964 7.50814 ) 10.88647 ) 3.34244 ) 0.0C988 ) 0.01788 ) 2.29784 ) ( 1255 ( 1258 0 F 5 1 15JL1964 6JL1964 16.52892 1 2.80813 I ( 1256 ( 12 59 E F 2 2 14JL1964 6JL1964 5.12933 ) 3.25359 ) 1 1260 ( 1262 ( 1263 ( 1266 ( 1269 B C 3 7 17AU1964 15AU1964 0. 01260 I 0.01201 1 ( 1442 ( 1264 B C 6 1 2AU1964 10AU1964 C. 59707 I C.0C193 1 ( 1265 C E 2 2 D E 3 3 18AU1964 15AU1964 4.17427 1 12.27868 ) ( 1267 ( 1270 0 F 6 1 18AU1964 10AU1964 C. 00216 ) C. 00272 I ( 1444 ( 1273 B C 6 ? 19S61964 10SE1964 0.0C909 ) 0.02688 ) ( 1271 ( 1275 C D 7 2 22SE1964 17SE1964 0. 01959 ) 0.05161 ) ( 1272 ( 1276 C 0 1 3 10SE1964 18SE1964 C.0C821 ) 0.06705 I ( 1277 D E 4 18SE1964 16SE1964 0.04338 ) 0.05540 ) ( 1279 ( 1283 E E 1 5 16SE1964 16SE1964 0.03141 1 1.07270 ) ( 1281 ( 1284 E E 2 6 16SE1964 17SE1964 4.94447 ) 0.01589 I ( 1285 ( 1788 F R 1 3 15SE1964 150C1964 0.01747 1 0.00653 1 ( 1286 ( 1445 F B 2 6 15SE1964 140C1964 0.05473 ) 0.11742 ) ( 1287 ( 1289 F C 3 7 15SE1964 140C1964 C.C2502 ) 0.01319 ) ( 1290 C J2 1 _2_ 160C1964 150C1964 0.01516 1 0.33016 ) ( 1291 ( 1294 C D 2 3 160C1964 150C1964 0.00245 ) 0.11867 ) ( 1292 ( 1295 0 0 1 4 150C1964 150C1964 0.03354 ) 0.08324 ) ( 1296 D 5 140C1964 130C1964 0.06688 ) 0.50116 ) ( 1297 ( 1301 D E 6 4 140C1964 130C1964 C. 01333 ) 0.67562 ) ( 1299 ( 1302 E E 2 5 120C1964 13CC1964 0.01571 ) C. 78144 ) ( 1303 E 6 130C1964 0.03358 ) ( 13C4 F 110C1964 NO 1964 0.01729 ) 0.01804 > ( 1305 ( 1308 F C 2 7 llnri 9*4 6N01964 C. 00518 ) 0.03954 ) ( 1309 ( 1312 D 1 2 10N01964 8N01964 0.00804 ) 0.08692 ) ( 1310 ( 1313 C 0 2 3 10N01964 9N01964 0.09524 ) 0.22973 ) ( 1311 ( 1314 0 0 1 4 8N01964 9N01964 C.1C835 ) 0.14067 I ( 1315 ( 1318 0 E 5 2 9N01964 7N01964 0.14559 ) 0.11986 ) ( 1316 ( 1319 D E 6 3 9N01964 7N01964 0.00756 I 0.36656 ) ( 1317 ( 1320 E E 1 4 6NC1964 7NG1964 0.20679 ) 0.72389 1 ( 1321 ( 1324 E F 5 2 7N01964 6N01964 C.4916C 1 0.01630 1 ( 1322 ( 1325 E F 6 3 7N01964 6N01964 0.31326 ) 0.00252 ) ( 1323 ( 1337 F C 1 3 6N01964 2HR1967 0.01951 I C. 06761 ) ( 1338 ( 1341 ( 1344 ( 1347 C A C E 3 3 3 2 28MR1967 19AP1967 25AP1967 23AP1967 0.20363 ) 0.30374 1 ( 1339 ( 1342 C A 5 4 28MR1967 19AP1967 0.04677 ) 0.71463 ) ( 1340 ( 1343 c A 7 6 2SHR1967 19AP1967 C.2C361 ) 0.00208 I 0.04632 1 0.91050 1 ( 1345 ( 1348 C E 5 5 25AP1967 23AP1967 1.77378 ) 0.31254 ) ( 1346 ( 1368 c A 7 3 21AP1967 4HY1967 C. 23367 ) C.0C628 ) ( 1369 ( 1374 A E 4 2 4MY1967 7MY1967 0.01864 ) 0.01195 ) ( 1370 ( 1375 A E 6 3 3HY1967 7HY1967 0.00230 ) 0.00722 ) ( 1372 ( 1376 C E 5 5 5HY1967 6HY1967 C. 00355 ) 0. 01124 1 188 I 1408 1 1411 A C 3 3 23MY1967 31MY1967 0.03577 ) 0.00410 1 1409 1412 A C 4 5 23PY1967 31MY1967 0.00595 ) 0.01263 ) ( 1410 < 1413 A C 6 7 24MY1S67 25HY1967 C. 05074 ) C. 00316 ) 1 1414 t 1431 E A 2 3 28MY1967 12JN1967 0.02015 ) 0.72096 ) 1415 1432 E A 3 4 28HY1967 13JN1967 0.01124 ) 2.14570 ) ( 1416 ( 1433 E C 5 3 28MY1967 17JN1967 C.C3936 ) 5.42566 ) I 1434 ( 1437 C E 5 3 17JN1967 15JN1967 0.83742 ) 0.27454 1 1435 1438 C E 7 5 13JN1967 14JN1967 2.65210 ) 0.14887 ) ( 1436 ( 1446 E A 2 3 15JN1967 11JL1967 C.5C659 ) 4.79429 ) 1 1447 I 1450 A C 4 5 11JL1967 16JL1967 11.46145 1 9.46396 ) 1448 1451 A C 6 7 10JL1967 16JL1967 0.02122 1 0.75784 1 ( 1449 ( 1452 C E 3 2 16JL1967 14JL1967 12.3C464 ) 3.27841 1 ( 1453 < 1505 E A 3 4 15J11967 28AU1967 4.42332 ) 0.17520 ) 1454 1508 E C 5 3 15JL1967 2SE1967 0.45609 ) 0.08792 ) ( 1504 ( 1509 A C 3 5 28AU1967 2SE1967 C.0C247 ) 2.11971 ) I 1510 I 1513 C E 7 5 29AU1967 31AU1967 0.07588 1 1.77359 1 1511 1532 E A 2 3 1SE1967 18SE1967 3.86776 ) 0.00657 ) ( 1512 ( 1535 E C 3 7 ISE1967 20SE1967 7.69593 ) 0.00966 ) ( 1536 < 1541 E E 2 2 24SE1967 U0C1967 2.29045 1 0. 01064 1 1537 1542 E E 3 3 24SE1967 110C1967 0.66419 ) 2.13588 ) ( 1538 ( 1379 E GS 5 3 23SE1967 9MY1967 C. 14915 ) C.0C309 ) 1 1380 ( 1383 GS C3. 4 7 9MY1967 10HY1967 0.01345 ) 0.01871 ) 1381 1384 GS GS 5 8 10MY1967 10HY1967 C. 00954 I C. 01294 ) ( 1382 ( 1385 GS GS 6 9 10HY1967 10MY1967 C. 00555 ) C.C0942 ) ( 1387 ( 1391 GS11 GS15 12MY1967 12MY1967 0.05941 ) 0.01437 ) 1388 1392 GS12 GS16 12MY1967 12HY1967 0. 00603 ) C. 04007 I I 1390 ( 1393 GS14 C-S17 12MY1S67 13HY1967 C. 00587 ) C.C1370 ) ( 1394 i 1398 GS18 GS22 13MY1967 14HY1967 0.24082 ) 0.04554 ) 1395 1554 GS19 GS 1 13MY1967 30C1967 0.01996 1 0.78275 ) ( 1397 ( 1555 ES21 GS 2 13MY1967 30C1967 C.0C131 ) C. 01412 ! I 1557 -1_1562_ GS 4 GSJO 30C1967 50C1967 0.04111 ) 0.00740 ) 1558 1563 GS 5 GS11 40C1967 50C1967 0.01189 » 0.01403 I ( 1560 ( 1564 GS 8 GS12 40C1967 50C196 7 C. 02834 ) 1 1565 .1 1571 GS13 GS19 50C1967 60C1967 0.01014 ) 0.00234 ) 1568 1572 GS16 GS20 50C196 7 60C1967 0.005T7 ! 0.00090 ) ( 1569 t 1573 GS17 GS21 50C1967 60C1967 C.0C297 ) 0.01008 ) ( 1575 L1546 _ GS28 LU 1 60C1S67 20C1967 0.0C258 ) 0.01501 ) 1544 1521 MU SH 1 1 20C1967 18SE1967 0.00715 1 C. 01154 > ( 1547 ( 1526 US fO 1 1 20C1967 20SE1967 C.CC798 ) C. 02845 ) ( 1527 -1 153JL.. TR FR ES sr. 1 1 20SE1967 24SE1967 0.03145 ) 0.01000 ) 1528 1545 SB WI- 1 1 20SE1967 20C1967 0.01444 ) 0.01351 ) I 1529 ( 1549 KU 1 1 20SE1967 40C1967 C. 05996 ) C.C1370 1 ( 1551 ( 1553 1 1 50C1967 60C1967 0.17573 1 0.05141 ) 1552 1428 SH HU 1 2 6UC1967 29HY1967 0. 03301 1 0.00301 ) ( 1550 ( 1426 KR KS I 2 50C1967 29HY1967 22MY1967 5MY1967 6MY1967 25AP1967 C. 18585 I C. 06299 ) C 1351 JL1350 _ MI 2 2 21AP1967 19AP1967 0.74476 ) 0.01101 ) 1427 1425 LU RA 2 2 29HY1967 25MY1967 1.01695 ) 0.17682 ) C 1417 ( 1399 HO PH 2 2 2 2 0.02617 ) C. 04081 ) 1 1401 I 1152_ HO KW 2 2 2 2 6MY1967 21AP1967 29MY1967 12MY1967 0.04116 ) 2.61123 ) 1402 1353 TR FR 2 2 6MY1967 23AP1967 0.04873 ) 0.01055 ) ( 1400 I 1354 SB GH 0.04765 ) 0.02071 ) ( 1429 ( 1405 0.02123 ) 0.59985 ) 1403 1407 CA SK 2 2 10MY1967 14PY1967 3.13648 ) 0.01791 ) ( 1404 ( 1349 HO CI 2 2 10KY1967 19AP1967 C.C5081 ) C.C8981 ) ( 1419 ( 1422 BU GA 2 2 23MY1967 23MY1967 0.40278 ) 0.4C873 ) 1420 1423 IH WA 2 2 23MY1967 25MY1967 0.33233 ) 0.18413 ) ( 1421 ( 1424 CH 2 2 23KY1967 25MY1967 C. 20819 ) 0. 26645 ) 1 1430 MC 2 12JN1967 0.02467 1 Synedra fasoioulata (Agardh) Kutz. Diatoma fasoioulata Agardh, Disp. Alg. Sveciae, p. 35. 1812. Synedra fasoioulata (Agardh) Kutzing, Bacill., p. 68. 1844. Cells in girdle view broadly rectangular, often occurring in colonies of 2 or more cells. Valves linear to linear-lanceolate with broadly rounded to subrostrate ends. Specimens from Lake Michigan 74-220y long, 4-6p broad. Striae marginal, appearing rather coarse, 12-15 in lOu. Axial area a broad lanceolate space without ornamentation,. No specially defined central area is present. A distinct slime pore is usually visible near one end of each valve. Most reports of this entity come from waters of high conductivity. In Lake Michigan it has been noted only in polluted harbors and appears to be associated with appreciable chloride contamination. Jill SYFASCIC TOT NO OF STATIONS 7 _ ( 1426 .i_i4_2a_ PS 2 20C1967 0.00238 ) ( 1521 29MY1967 „ZSMja96_7_ 0.05249 ) C.1C617 1 < 1417 I 0.00374 ) GH 2 Synedra minus aula Grun. Synedra minus aula Grunow in: Van Heurck, fig. 13. 1881. Syn. Diat. Belgique, pi. 39, Cells in girdle view elongate rectangular. Valves linear-lanceolate to lanceolate with more or less sharply attenuated, sometimes slightly protracted, ends. Specimens from Lake Michigan 15-30y long, 2-3u broad. Striae parallel throughout the length of the valve, finely structured but distinct, 18-20 in lOu. Axial area narrow, distinct. In the Lake Michigan specimens the cen- tral area is usually entirely lacking; when present it consists of a small structureless area surrounded by a few shortened striae. 189 This species is rare in our collections. The specimens observed are probably ultimately derived from periphyton communities. Previous reports indicate that this species reaches its greatest abundance in periphyton communities where it grows attached to filamentous algae. 425 SYHINUSC ICT NO OF STATIONS 61_ (60973 CH 1876 0.02362 1 (46910 (.46924 (46916 CH CH 10FY1946 4MY1947 0. 00071 ) 0.00136 1 (46923 (46506 CH CH 22N01946 MY1947 0.00219 1 C. 00199 ) (46909 (46919 CH CH (46913 (46771 CH EV 6AU1947 11JN1937 0.01046 ) 0.00951 ) (46922 (46743 CH EV 21AU1947 20JN1937 0.00145 ) 0.03426 ) (46758 (46770 EV EV ( 1427 L.L3A3_ LU 2 „ER_„2_ 29MY1967 _2A4PJLS6J_ 0.02421 ) ( 1417 22MY1967 0.00374 ) MR1947 5JN1947 5JN1937 9J11937 C. 00455 ) 2.26855 ) 1.39790 ) „C,_01789_]_ (46764 (46763 EV EV 17JL1937 23AU1937 0.07252 ) 0.18263 ) (46757 (46752 EV EV 25JL1937 15SE1937 0.04333 1 0.10884 ) (46747 (46760 EV EV 1AU1937 22SE1937 0.02971 ) C.CC492 ) (46750 14.6262- EV EV 24SE1937 18MR1938 0.O9426 ) 0.04411 ) (46749 (46756 EV EV 12MR1938 27AP1938 0.01214 ) 0.00168 ) (46768 ( 1439 EV B 6 16MR1938 5JN1964 C. 01470 ) C.0C599 ) ( 1441 ( 1279 B 6 E 1 24JL1964 16SE1964 0.00220 ) 0.00393 ) ( 1255 ( 1285 D F 5 1 15J11964 15SE1964 0.00513 I 0.01747 ) ( 1257 ( 1286 E F 3 2 14J11964 15SE1964 0.CC718 ) C. 01095 ) ( 1321 ( 1449 E 5 C 3 7N01964 16JL1967 0.0C319 ) 0.00382 1 ( 1370 ( 145C A C 6 5 3HY1967 16JL1967 0.C0230 ) 0.00190 ) ( 1431 ( 1452 A E 3 2 12JN1967 14JL1967 0.00257 ) C.CC213 ) ( 1536 ( 1556 E 2 GS 3 24SE1967 30C1967 0.00273 ) 0.00521 1 ( 1540 ( 1558 c GS 5 40C1S67 40C1967 0.00496 ) 0.00793 ) 1 1542 ( 1560 E GS 3 8 110C1967 4CC1967 C. 01017 ) C. 00472 ) ( 1567 J 1546 GS15 111 1 50C1967 20C1967 0.00159 ) 0.96034 ) ( 1544 ( 1526 MU MO 1 1 2CC1967 20SE1967 0.00715 ) 0.01707 ) < 1547 ( 1530 FS FR 1 1 20C1967 24SE1967 C. 07186 1 0.09001 ) ( 1545 1 15-h WL 1 FS 1 2CC1967 5(1C1967 0.73654 ) 0.00799 ) ( 1548 ( 1550 CA MR 1 1 3CC1967 50C1967 0.01272 ) 0.09912 1 t 1549 ( 1351 P. I 1 2 40C1967 21AP1967 C. 01370 ) C. 00310 ) Synechia montana Krasske Synedra montana Krasske ex Hustedt in: land, 7(2)2:204, fig. 694. 1932. Rabenhorst, Kryptog.-Fl. Deutsch- Cells in girdle view very narrowly linear for most of their length, abruptly expanded near the center. Valves very narrow except at the expanded central portion, often more or less constricted at the center, with subcapi- tate ends. Specimens from Lake Michigan 80-200u long, 3-4u broad at the widest part, only 1-1. 5u broad near the ends. Frustules are often curved. Striae distinct, 12-14 in lOu. Axial area variable, often relatively broad and lanceolate in outline, especially in the larger individuals. Central area completely lacking in our specimens. The specimens from Lake Michigan have somewhat coarser structure and a greater size range than those originally described from the Alps. The general morphology of the frustule is, however, essentially similar. It appears that this species is much more common in periphyton communities in Lake Michigan than it is in the plankton. 708 SYSPECOK TCT NO OF STATIONS 63 ( 3541 EV _..E_V_ B 6 F 2 1FE1881 1AU1937 _2AS.USJ7.. 11JL1964 6.IL1964 0.00978 ) 46517 CH 12JA1946 0. 00028 ) (46913 CH 6AU1547 C. 01046 ) (46747 (4675C 0.02971 1 0.01414 I 46763 46749 EV EV E B 3 6 23AU1937 12MR1938 14JL1964 2AU1964 C. 06088 ) 0.02427 ) 0.00239 ) 0.00682 ) (46760 (46762 ( 1258 ( 1270 EV EV F F 1 1 22SE1937 18MR1938 6J11964 10AU1964 C. 01477 ) C. 04411 1 ( 1440 ( 1?59 0.00369 1 0.01239 ) 1257 1442 C.0C944 ) 0.00272 ) I 1298 E 1 E .5. F 2 C« 2 0 3 E 1 12CC1<64 _J3QC_IS6A_ 110C1964 10N01964 9N01964 6N01964 0.00269 ) 0.C1620 ) 0.01553 I 0.01134 i 0.00579 ) 0.00574 ) 1299 1303 1308 1311 1314 1319 E 6 2 6 120C1964 13CC1964 0. 00314 } 0.00560 ) ( 1300 ( 1304 E F 3 1 130C1964 110C1964 C. 00716 ) C.C0988 ) ( 1305 C 0 7 1 6N01964 8N01964 C. 00304 I C. 02064 ) ( 1309 ( 1312 C 0 1 2 6 4 10N01964 8N01964 9N01964 7N01964 C. 02251 1 C.C1242 ) ( 1313 ( 1317 D E 4 3 9N01964 7N01964 0.00861 ) C. 00262 ) ( 1316 ( 1320 D E C. 00756 I C.C4137 ) ( 1321 ( 132.4 E 5 Fi 7N01964 6N01964 0.00319 1 0.00466 1 1322 1225 E F 6 3 7N01964 6N01964 0.00667 t 0.C0504 ) ( 1323 ( 1348 F E 1 5 6N01964 23AP1967 C. 01254 1 C.0C137 1 ( 1432 A 4 c _a_._ E 3 C 7 13JN1967 16JL1967 1SEW67 20SE1967 0.00511 ! 0.01146 1 0.01178 ) 0.00322 ) 1433 1450 1532 1540 C c 3 5 17JN1967 16JL1967 0.00646 ) 0.00571 I ( 1447 ( 1510 A C 4 7 11JL1967 29AU1567 0.00936 ) C.0C316 ) ( 1512 1 1535 A C 3 5 18SE1967 40C1967 0.00329 ) 0.00496 ) < 1533 ( 1379 A GS 4 3 19SE1967 9HY1967 0.00464 ) C.0C619 ) ( 1389 1 1554 GS13 GS 1 12MY1567 30C1967 0.00516 1 0.01779 1 1393 1557 GS17 GS 4 13MY1967 30C1967 0.00822 ) C. 00747 1 ( 1394 ( 1558 csie CS 5 13MY1967 40C1967 C.0C344 I C.C1189 ) ( 1562 ( 142 5. _ GS10 RA 2. 50C1967 25MY1967 0.00247 ) 0.03536 ) 1526 1403 MC CA 1 2 20SE1967 10MY1567 0.00569 ) 0.01308 ) ( 1548 ( 1404 CA ► 0 1 2 30C1967 10MY1967 C.C3816 ) C. 03811 ) 190 Synedra ostenfeldii (Krieger) A. Cleve Synedra aaus var. ostenfeldii Krieger, Pflanzenforsch. , 10:36, fig. 29- 2b. 1927. Synedra ostenfeldii (Krieger) A. Cleve-Euler ex Stalberg, Verh. Internat. Verein. Limnol., 9:194. 1940. Cells in girdle view linear-lanceolate, narrowing Slightly from the middle to the rectangular ends. In life several cells are united at one end to form bushy colonies. Specimens from Lake Michigan 80-170u long, 2-3u broad. Valves lanceolate with capitate ends, very lightly silicified. Striae with very delicate structure 16-24 (usually 20-24) in lOy. Axial area rela- tively broad, indistinctly bordered. Central area lacking in specimens from Lake Michigan. This species is quite common in the summer flora of Lake Michigan, es- pecially in areas that have undergone some degree of eutrophication. It is variable in morphology and the structures of the valve are so delicate that thev are difficult to resolve satisfactorily except under optimal conditions. 702 SYSPECOB TCT NO OF STATIONS 271 ( 3541 CH (46917 r.H (46924 -I469fl4_ CH CH (46906 146913 CH CH (46771 EV -IA676JJ EJ£__ (46749 EV (46756 FV (46766 EV ( 1??5 r. 6 ( 1245 ( 1248 F 2 B 3 ( 1249 ( 1252 C 3 C 1 ( 1255 ( 1258 ( 1261 J_1443_ 0 5 F 1 B 3 B 6 ( 1266 ( 1269 ( 1272 0 3 E 3 C 1 0 2 ( 1278 ( 1281 ( 1284 ( 1287 0 6 E 3 E 6 F 3 ( 1290 1 1295 C 1 D 4 ( 1298 _L_130J_ ( 1307 J_JJ10_ E 1 E 4 B 6 C 2 ( 1313 ( 1316 D 3 D 6 E 3 __E__6 C 3 C 7 A 6 C 7 ( 1319 ( 1322 ( 1337 ( 1340 ( 1343 ( 1346 ( 1368 ( 1371 ( 1374 E 2 ( 1408 _A_3_ ( 1411 C 3 I 1414 £_£_ A 3 _C 3 A 3 C ( 1431 ( .1434. ( 1437 E 3 ..I.. 14 47 A 4 ( 1450 C 5 ( 1453 F 3 ( 1505 -_1_150_9_ ( 1512 ( 1533 A 4 -£_5_ E 3 A 4 1FE1881 12JA1946 10*Y1946 MR1S4J_ 0.01956 ) 0.00111 ) (46921 (46915 MY1947 6AU1947 0.0C423 ) 0.02277 I (46923 (46912 CH CH 23NC1945 20FE1946 5.60821 ) 0.01046 1 CH CH 22N01946 AP1947 0.00194 ) 0.07967 ) (46919 (46922 11JN1937 30AU1937 C. 99853 ) 0.01673 ) CH CH 12MR1938 27AP1938 0.08496 ) 0.89326 ) (46743 (46750 (46751 (46759 EV EV 5JN1947 21AU1947 0.00874 ) 0.06899 I (469C8 (46914 CH CH (46920 (46916 14DE1938 15MY1964 0.03169 ) 0.24696 1 EV EV 20JN1937 24SE1937 1.18359 ) 0.10468 I (46907 (46758 CH CH 0E1945 19AP1946 ( 1223 ( 1226 14MY1964 16WY1964 0.21020 ) 0.34243 ) 18JN1964 8JN1964 0.12652 ) 0.09627 ) ( 1229 ( 1232 B 3 C 7 D 5 E 5 30MR1938 19HY1938 0.18412 ) C. 00471 ) (46747 (46744 CH EV 200E1946 4MY1947 C. 02014 ) 0.01281 ) 18MY1964 16MY1964 0.01117 ) 0.07090 ) ( 1235 ( 1237 C 7 C 2 14MY1964 16HY1964 0.06563 ) 0.45282 ) (46772 (46761 EV EV JL1947 5JN1937 C.0C062 ) 3.08754 ) 16JN1964 8JN1964 0.14802 ) 0.08696 ) ( 1224 ( 1227 EV EV 1AU1937 60C193 7 C. 705 15 ) C. 64903 ) 0.28808 I 0.36092 I ( 1230 ( 1233 B 4 C 2 18AP1938 27HY1938 C. 00743 ) C.C1463 1 I 1439 ( 1238 E 2 E 3 18MY1964 13HV1964 C.C4258 ) 0.10356 ) 16MY1964 5JN2964 0.02549 ) C. 05264 I B 6 0 3 5JN1964 11JN1964 0. 24004 ) C. 36675 ) 1.11888 ) C. 26000 ) 13JN1964 0.19033 I ( 1243 11JN1964 24 JL 1964 8JL1964 16JL1964 0.09681 ) 0.13794 ) ( 1246 ( 1440 E 6 F 3 B 6 13JN1964 C. 19001 I ( 1244 0.01358 ) 0.01674 ) ( 1250 ( 1253 11JN1964 11JL1964 15JL1964 6J11964 5.92885 ) 0.22182 I ( 1256 ( 1259 C 6 C 2 2AU1964 16AU1964 0.02944 ) 0.01186 ) E 2 F 2 10JL1964 16JL1964 14JL1964 6JL1964 0.26893 ) 3.09540 ) ( 1247 ( 1441 F 1 B 3 B 6 13JN1964 C. 15968 ) 11JN1964 0.04934 ) 1.43885 ) 0.44048 ) ( 1251 ( 1254 14JL1964 24JL1S64 ( 1262 ( 1263 18AU1964 15AU1964 B 3 C 7 2.17997 ) 1.19298 I ( 1257 ( 1260 C 7 0 2 16JL1964 15.111964 0.02134 ) 2.62120 ) 17AU1964 15AU1964 0.22099 ) 4.98821 ) ( 1267 ( 1444 10SE1964 17SE1964 0.00821 ) 0.01935 ) D 6 B 6 C. 02730 ) C. 02002 ) E 3 F 3 C. 15354 ) 2.41333 ) 18AU1964 19SE1964 ( 1273 ( 1276 C 2 0 3 18SE1964 16SE1964 17SE1964 15SE1964 0.01922 ) 4.39509 ) ( 1279 ( 1282 10SE1964 18SE1964 0.00216 ) 0.02122 ) ( 1442 ( 1265 B 6 C 2 14JL1964 6JL1S64 7.03433 ) 0.93588 1 ( 1268 ( 1271 C. 09678 ) 1.13992 ) E 1 E 4 160C1964 150C1964 0.05719 ) 0.19015 I ( 1285 1 1445 16SE1964 16SE1964 ( 1274 ( 1277 E 2 C 7 2AU1964 10AU1964 D 1 a 4 15AU1964 22SE1964 1.07472 ) C.C4695 ) F 1 B 6 0.01137 ) 0.05351 ) 15SE1964 140C1964 0.02356 1 C. 91967 ) 120C1964 130C1964 ( 1293 ( 1296 D 2 0 5 N01964 10N01964 9N01964 9N01964 0.00539 ) 0.09273 ) I 1299 ( 1302 150C1964 140C1964 0.08153 ) 0.03588 ) ( 1280 ( 1283 17SE1964 18SE1964 0.42127 ) C. 02611 ) ( 1286 ( 1289 E 2 E 5 C. 01877 ) C. 09295 ) E 2 E 5 0.01443 ) O.O06B0 ) O.C5405 ) 0.20777 ) ( 1308 J_UAL. 120C1564 130C1964 0.01415 ) 0.04328 ) ( 12 94 ( 1297 F 2 C 7 16SE1964 16SE1564 0.52420 I 1.43435 ) 15SE1964 14CC1964 ( 1314 ( 1317 C 7 0 1 0.01257 ) 0.12957 ) < 13C0 ( 1303 0 3 0 6 0.76620 ) 0.0C879 ) 6N01964 8N01964 7N01964 7N01964 2MR1967 28HR1967 0.85356 ) .0.35325 ) 0.08084 ) 0.66173 ) ( 1320 J 1324 C 4 E 1 0.00304 I 0. 00774 ) E 3 E 6 150C1964 140C1964 9N01964 6N01964 E 4 F 2 0.04306 ) 0.01532 ) ( 1309 (1312 C> 1 D 2 130C1964 130C1964 19AP1967 21AP1967 ( 1338 _L 1341 C 3 A 3 7N01964 6NC1964 C. 28956 ) 0.00466 ) ( 1315 ( 1318 10N01964 8N01964 C. 12526 ) C.C3808 ) C. 22552 ) C.C1119 ) D 5 E 2 0.12644 ) 1.02813 ) ( 1344 ( 1347 28MR1967 19AP1967 C 3 E 2 4MY1967 4MY1967 7MY1967 „2 3jm?_67 0.65975 ) 0.00462 ) ( 1369 ( 1372 25AP1967 23AP1567 0.15735 ) 0.45562 ) ( 1321 ( 1336 9NG1964 7N01964 C.CC161 ) 0.00931 I E 5 C 3 ( 1339 ( 1342 7NC1964 27JA1967 C.C5005 ) C. 02854 ) C 5 A 4 31MY1967 28MY1967 12JN1967 __!7JN_1967_ 0.00598 ) 0.31302 ) 0.14360 ) C.47C19 ) A 4 C 5 1.15808 ) 2.27624 ) 28MR1967 19AP1967 ( 1345 ( 1348 4HY1967 5MY1967 ( 1375 ( 1409 E 3 _A_ 4 0.01491 ) C. 12058 I C 5 E 5 C.C4469 ) C.00385 _) C. 4 3 649 ) 1.38957 ) ( 1412 ( 1415 7MY1967 23MY1967 15JN1967 11JL1967 2.7C361 I 0.57722 ) C 5 E 3 0.09865 ) 0.19044 ) ( 13 70 ( 1373 25AP1967 23AP1967 A 6 C 7 31MY1967 28MY1967 1.31887 ) 1.39175 I 16JL1967 15JL1967 ( 1432 _(_ 1435 ( 1438 ( 1448 A 4 C 7 13JN1967 13JN1967 0.88391 ) 0.52615 ) ( 1376 ( 1410 3MY1967 5MY1967 2.59244 ) C. 32077 ) E 5 A 6 ( 1413 ( 1416 6MY1967 24HY1567 E 5 A 6 1.78809 ) C. 73880 ) ( 1433 ( 1436 C 7 E 5 28AU1967 2SE1967 3.99886 I 7.25425 ) 1SE1967 19SE1967 0.01031 ) 0.84789 ) ( 1451 ( 1454 14JN1967 10JL1967 C 7 E 5 ( 1506 ( 1510 16JL1967 15JL1967 0.64633 ) C. 01061 ) C 3 E 2 25HY1967 28HY1967 C. 03222 ) C.C2567 1 C. 36541 f C. 51308 ) ( 1446 (1449 17JN1967 15JN1967 0.10108 ) C.2C556 ) 0.15944 ) C. 28006 ) A 3 C 3 12.36846 ) 0.02321 I ( 1513 ( 1534 A 6 C 7 E 5 A 6 29AU1967 29AU1967 ( 1452 ( 1504 31AU1967 19SE1967 0.00523 ) 0.04742 ) 0.78038 ) 0. 00620 ) 1 1508 ( 1511 E 2 A 3 11JL1967 16J11967 2.71283 ) 3.54610 ) C 3 E 2 14JL1967 28AU1967 0.68490 ) 5.62971 ) 1 1532 ( 1535 2SE1967 ISE1967 1.78822 ) C. 01726 } A 3 C 7 18SE1967 20SE1967 C. 19583 ) 0.71830 1 0.01643 ) C. 00322 ) 191 ( 1536 ( 1540 E C 2 5 24SE1967 40C1967 0.95435 ) 0.00496 ) 1537 1541 E E 3 2 24SE1967 11CC1967 9.05719 ) C. 18626 ) ( 1538 ( 1542 E E 5 3 23SE1967 11GC1967 1.9333S ) 2.13588 1 ( 1543 ( 1379 E GS 5 3 100C1967 9MY1967 0.02873 1 0.02476 ) 1377 1380 GS GS 1 4 9NY1967 9MY1967 C. 01187 1 0.39348 ) ( 1378 ( 1381 GS GS 2 5 9MY1967 10MY1967 C. 04626 ) C. 12641 ) ( 1382 t lifiS. GS GS 6 9 10HY1967 10MY1967 0.00833 ) 0.01648 ) 1383 1386 GS 7 GS10 10MY1967 12MY1967 C. 10960 I 0.01149 ) ( 1384 ( 1387 GS 8 GS11 10MY1967 12MY1967 0.12940 ) C. 17823 ) ( 1388 GS12 GS16 12MY1S67 12MY1967 0.01207 ) 0.04623 ) 1389 1393 GS13 GS17 12MY1967 13MY1967 0.00516 I 0.04931 ) ( 1391 ( 1394 GS15 GS18 12MY1967 13MY1967 C. 03831 ) C. 34747 1 ( 1395 GS19 GS 1 13MY1967 30C1967 0.01996 ) 0.78275 ) 1397 1555 GS21 GS 2 13MY1967 30C1967 0.00262 I 0.05297 ) ( 1398 ( 1556 GS22 GS 3 14MY1967 30C1967 C.G4554 ) C.02086 ) 1 1557 ( 1560 GS GS 4 8 30C1967 40C1967 0.02616 ) 0.01889 ) 1558 1561 GS GS 5 9 40C1967 40C1967 0.03567 1 0.00587 ) ( 1559 ( 1562 GS 7 GS10 40C1967 50C1967 C. 10142 I C. 04194 1 ( 1574 ( 15J1 ( 1529 ( 1548 GS22 «H 1 KM 1 CA 1 60C1967 0.00288 ) 1547 1526 MS Mfl 1 1 20C1967 20SF1967 0.01597 ) (1.(15120 1 ( 1520 ( 1527 HO TR 1 18SE1967 2CSF1967 C. 01414 ) C.C125E ) 20SE1967 30C1967 0.02398 ) 0.02544 1 1530 1549 FR MO 1 1 24SE1967 40C1567 0.03000 ) C. 01370 ) ( 1545 ( 1551 ML ES 1 1 20C1967 50C1967 C. 01351 ) C. 01598 ) ( 1552 SM MS 1 2 60C1967 29MY1967 0.01321 ) 3.86352 ) 1553 1351 SG Ml 1 2 60C1967 21AP1967 0.00734 ) 0.49651 ) ( 1428 ( 1427 MU LU 2 2 29MY1967 29MY1967 C. 02109 1 3.29298 ) ( 1417 HO RA 2 2 22MY1967 25MY1967 0.10842 ) 0. 20334 ) 1418 1399 SH PM 2 2 22MY1967 5MY1967 0.03110 ) 1.19695 ) ( 1350 1 1401 BH MO 2 2 19AP1967 6MY1967 0.00220 ) C. 25282 ) ( 1402 ( 1353 TR FR 2 2 6MY1967 23AP1S67 0.40065 ) 0.36920 I 1400 1354 SB GH 2 2 6MY1967 25AP1967 0. 80415 ) 0.12773 ) ( 1352 « 1429 KM ML 2 2 21AP1967 29MY1967 C.93627 ) C. 19110 ) ( 1403 ( 1407 CA J5M 2 2 10HY1967 14MY1967 1.32078 ) 0.08957 1 1404 1349 MQ CI 2 2 10MY1967 19AP1967 0.07622 ) 0.36281 ) ( 1405 ( 1406 ES GB 2 2 12MY1967 13MY1967 C.05B05 ) C.0C270 ) ( 1419 ( 1422 ( 1430 BU GA MC 2 2 2 23MY1967 23MY1967 12JN1567 0.45771 ) 0.37807 ) 1420 1423 IH MA 2 ? 23MY1967 25MY1967 0.52870 I 0.25693 ) ( 1421 ( 1424 CH 2 2 23MY1967 25MY1967 C. 27758 1 C. 50626 ) 0.02467 1 Synedra parasitica (Wm. Smith) Hust. Odontidium ? parasiticum Wm. Smith, Syn. British Diat., vol. 2, p. 19, supp. pi. 60, fig. 375. 1856. Fragilaria ? parasitica (Wm. Smith) Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 45, fig. 30. 1881. Synedra parasitica (Wm. Smith) Hustedt in: Pascher, Sussw.-Fl. Mittel- europas, Heft 10, Aufl. 2, p. 161, fig. 195. 1930. Cells in girdle view rectangular, on focusing obviously expanded in the central portion. Valves rhombic-lanceolate with much expanded centers and narrow, sharply attenuated to subcapitate ends. Specimens from Lake Michigan 10-25u long, 4-6y broad. Axial area broad, lanceolate, without visible orna- mentation. Striae finely structured, short 16-19 in lOu. This species often grows attached to some of the larger tychoplanktonic algae, especially members of the genera Nitzschia, Surirella, and Cymatopleura. (46971 (46924 (46905 (46758 (46767 ( 1245 _(..138a ( 1393 L 1397 ( 1352 r,H CH r.H ev FV F 2 GS17 GS17 GS21 KM 2 0.00129 ) (46915 CH 20FE1946 0.0C569 ) (46914 CH 19AP1546 C.CC320 ) 10MY1946 JA1947 5JN1937 270C1937 UJN1964 12MY1967 13MY1S67 13MY1967 21AP1967 0.00141 I 0.00123 ) (46923 (46909 CH CH 22NQ1946 MR1947 0.00656 ) 0.00911 ) (46920 (46907 CH CH 20DE1946 JL1947 C.0C062 ) C.CCC49 ) 0.00357 .1 0.0C387 1 (46747 (46749 EV EV 1AU1937 12MR1938 0.00495 ) 0.01214 1 (46765 ( 1242 EV E 3 30AU1937 13JN1564 C.0C558 ) C.CC150 ) 0.00346 ) 0.00603 1 0.00274 ) 0.00065 ) 0.00859 ) ( 1304 ( 1389 F 1 GS13 110C1964 12MY1967 0.00247 ) 0.00774 1 ( 1453 ( 1392 E 3 GS16 15JL1967 12MY1967 C.0C253 ) C.0C308 ) ( 1394 ( 1565 GS18 GS13 13MY1967 50C1967 0.00516 ) 0.03549 ) ( 1395 1 1350 GS19 BH 2 13MY1967 19AP1967 C.0C235 ) C. 01542 I ( 1404 MQ 2 10MY1967 0.02541 I ( 1405 ES 2 12MY1967 C.CC645 ) Synedra parasitica var. svhconstricta (Grun.) Hust. Fragilaria parasitica var. subconstricta Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 45, fig. 29. 1881. _ m Synedra parasitica var. subconstricta (Grun.) Hustedt in: Pascher, Sussw.- Fl. Mitteleuropas, Heft 10, Aufl. 2, p. 161, fig. 196. 1930. Valves more or less constricted in the middle, other morphologic features of the frustule and ornamentation of the valve essentially similar to the nominate variety. 677 SYPARAVS TGT NO OF STATIONS 19AP1967 0.00108 ) ~ ( 1350 BH 2 19AP1967 0. 04405 I ( 192 Synedra pulahella Ralfs Synedva pulehella Ralfs ex Kutzing, Bacill., p. 68, pi. 29, fig. 87. 1844. Cells in girdle view rectangular- lanceolate, slightly narrowed toward the ends. Valves lanceolate to linear- lanceolate with attenuated, rostrate or subcapitate ends. Specimens from Lake Michigan 46-100u long, 5-7p broad. Valves strongly silicified, all structures distinct and robust in appearance. Axial area narrow, slightly lanceolate, broader toward the mid-portion of the valve. Central area quadrate extending entirely across the mid-portion of the valve, distinctly thickened at the margins with an ovoid, less thickened re- gion occupying the center. This area sometimes contains ornamentation appear- ing as partially developed striae. Striae well defined, distinctly punctate, parallel through most of the length of the valve, becoming slightly radiate near the apices, 12-16 in lOu. This species is most often reported from mineralized inland waters or from brackish waters. It is very rare in Lake Michigan at the present time but can be expected to become more abundant in areas receiving heavy pollution from wastes high in chlorides. 678 SYPULCHE TOT NO OF STATIONS ( 1504 I 1350 A 3 BH 2 28AU1967 I9AP1967 0.00247 I 0.00220 » { 1428 ( 1406 MU GB 29MY1967 13HY1967 0.01205 ) 0.00539 I I 1426 J Synedra rumpens Kutz. n Synedra rumpens Kutzing, Bacill., p., 1844. 69, pi. 16, fig, 6(6), figs. 4-5. Cells in girdle view linear, very slightly narrowed toward the ends. Valves linear-lanceolate with somewhat protracted, rostrate to subcapitate ends. Specimens from Lake Michigan 30-7 Ou long, 2-4u broad. Axial area narrow, linear through most of the length of the valve, in some specimens widened near the midportian of the valve. Central area a structureless transverse fascia extending to the margins of the valve, not visibly thickened. 67'S SVRUMPEN TCT NO OF STATIONS 46 (60973 CH 1876 0.07085 ) 46917 CH 12JA1946 0.00083 ) (46914 CH 19AP1946 0.00214 ) (46920 (46922 CH CH 200E1946 21AU1947 0.00123 ) 0.00097 ) 46916 46764 CH EV 4MY1947 17JL1937 0.00034 ) 0.00806 ) (46919 (46747 CH EV 5JN1947 1AU1937 C. 00455 ) C.0C743 1 (46765 (46749 EV EV 30AU1937 12MR1938 0.00558 1 0.01214 ) 46752 46768 EV EV 15SE1937 16MR1938 0.02177 ) 0.01470 ) (46750 (46756 EV EV 24SE1937 27AP1938 C. 00471 ) C.0C168 ) ( 1284 ( 1313 6 6 D 3 17SE1964 9N01964 0.00635 ) 0.00579 ) 1302 1314 E 5 D 4 130C1964 9N01964 C. 02429 ) 0.00574 1 ( 1311 ( 1317 D 1 E 1 8N01964 6N01964 0.00516 1 0.CC383 ) ( 1318 ( 1321 E 2 E 5 7N01964 7N01964 0.00380 ) 0.00638 ) 1319 1322 E 3 E 6 7N01964 7N01964 0.01571 ) C. 00667 1 ( 1320 ( 1324 E 4 F 2 7N01964 6N01964 C. 01861 ) C. 00466 ) ( 1342 ( 1396 A 4 GS20 19AP1967 13MY1967 0.00180 ) 0.00148 1 1371 1574 C 3 GS22 4MY1967 60C1967 C. 00231 ) 0.00288 ) ( 1395 ( 1544 GS19 fU 1 13MY1967 20C1967 C.0C117 ) C. 00715 1 ( 1547 ( 1531 MS 1 GH 1 20C1967 25SE1967 0.00798 I 0.00845 ) 1522 1545 BH 1 ML 1 18SE1967 20C1967 C. 00365 ) 0.01351 ) ( 1527 ( 1549 TR 1 MO 1 20SE1967 40C1967 0.00629 ) C. 01370 ) ( 1550 ( 1417 MB 1 HO 2 50C1967 22MY1967 0.18585 ) 0.01122 ) 1428 1350 MU 2 BH 2 29MY1967 19AP1967 0.01205 ) C. 03084 1 ( 1427 ( 1351" LU 2 FR 2 29MY1967 23AP1967 0.02421 ) C. 01055 ) < 1354 GH 2 25AP1967 0.00863 ) Synedra rumpens var. familiaris (Kutz.) Hust. Synedra familiaris Kutzing, Bacillft, p. 68, pi. 15, fig. 12. 1844. Synedra rumpens var. familiaris (Kutz.) Hustedt in: Pascher, Sussw.-Fl. Mitteleuropas, Heft 10, Aufl. 2, p. 156, fig. 176. 1930. Valves linear-lanceolate, somewhat constricted in the middle and slightly swollen on either side of the central area. Striae parallel throughout, about 18-20 in lOy, appearing more delicate than in the nominate variety. 193 680 SYRUMPVF TGT NO CF STAT1 XNS 9 (46757 EV 1 1236 C" 1 25JL1937 8JN1964 C. 00481 ) 0.00175 1 (46763 ( 1522 EV BH 1 23AU1937 18SE1967 C. 12175 ) 0.00182 ) <46761 < 1526 EV HO 1 27HY1938 20SE1967 C.CC273 ) { 1527 TR 1 20SE1967 0.00629 ) < 1428 HU 2 29**1967 0.C0301 ) ( 1350 BH 2 19AP1967 C. 00220 ) Synedva vumpens var. fvagilavioides Grun. Synedra vumpens var. fvagilavioides Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 40, fig. 12. 1881. Frustules more strongly silicified than in the nominate variety. Striae 10-12 in lOy, visibly cross-lineate. Central area appears thickened and often contains irregular markings appearing as partially developed striae. In some specimens the central area is somewhat expanded. Shape, size range and general morphology of the frustule essentially similar to the nominate variety. 662 SYRUMPVR TOT NO OF STATIONS 8 ( 1235 C 7 1 m« r. 3 16JN1964 0.00565 ) 28MR1967 0.00132 ) ( 1240 ( 1341 0 6 A 3 10JM964 19AP1967 0.00767 ) 0.00108 ) ( 1243 ( 1343 E 6 A 6 13JMS64 19AC1967 0.C02O9 ) C. 00069 ) 1 134* C 7 21AP1967 0.00134 ) 1 1408 A 3 23KY1S67 C. 00447 ) 1 Synedra vumpens var. meneghiniana Grun. Synedva vumpens var. ? meneghiniana Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 40, fig. 13. 1881. Valves linear with rostrate ends. Striae 13-15 in lOy, without visible substructure. Other morphologic features of the frustule essentially similar to the nominate variety. These entities are all found in periphyton communities in a variety of habitats. Occasional specimens are noted in offshore plankton collections from Lake Michigan. 681 SYRUMPVM TOT NO CF STATIONS 19API967 0.00217 ) Synedva ulna (Nitz.) Ehr. Baoillavia ulna Nitzsch, Neue Schrift. Naturf. Ges. Halle, 3(1) :99, pi. 5. 1817. Synedva ulna (Nitz.) Ehrenberg, Ber. Akad. Wiss. Berlin 1836:53. 1836. Cells in girdle view very elongate-rectangular, usually slightly ex- panded at the ends. Valves linear to linear-lanceolate with rostrate ends. Specimens from Lake Michigan 75-220u long, 5-8u broad. Axial area narrow, linear. Central area usually a hyaline fascia reaching both margins of the valve, in some specimens reduced or entirely lacking. Striae parallel throughout, finely but distinctly lineate-punctate, 8-12 in lOy. A distinct "jelly pore" is present at one end of each valve. This species finds its primary habitat in the periphyton but is often found in plankton collections, often in considerable abundance. Numerous varieties have been described. The majority of these are also usually found in periphyton communities but some are adapted to planktonic existence. 194 683 SYUINA TOT NO CF STATIONS 127 ( 3540 1 469? 1 CH CH 11MY1879 23N01545 0.01398 ) 0.00388 ) 3541 46917 CH CH 1FE1881 12JA1946 C. 12716 ) 0.00083 ) (46910 (46915 CH CH 0C1945 20FE1946 C.CC109 ) 0.00569 ) (46914 (46920 CH OH 19AP1946 20DE1946 0.00107 ) 0.01048 ) 46924 469C5 CH CH 10MY1946 JA1947 0.00282 ) 0.00613 ) (46923 (46912 CH CH 22N01946 AP1947 C.C1530 ) C.C1150 ) (46916 CH 4MY1947 0.00645 ) r.nnn49 ) 469C6 4*913 f.H MY1947 6AIT947 0.00199 ) (1.03138 1 (46919 I469J? CH CH 5JN1947 21AU1947 C. 05766 ) C.CC679 1 (46758 (46745 EV EV 5JN1937 3JL1937 0.64903 ) 0.C418C 1 46771 46770 EV EV 11JN1937 9JL1937 0.03566 ) 0.23855 ) (46743 (46764 EV EV 20JN1937 17JH937 0.43676 ) C.C9670 ) (46757 (46752 EV EV 25JL1937 15SE1937 0.06740 ) 0.04354 ) 46747 46760 EV EV 1AU1937 22SE1937 0.13862 ) 0.01477 ) (46763 (46750 EV EV 23AU1937 24SE1937 0.04058 ) C. 01414 ) (46748 (46768 EV EV 130C1937 16MR1938 0.02135 ) 0.01470 1 46767 46762 EV EV 270C1937 18MR1938 0.01160 ) C. 066 17 ) (46749 (46772 EV EV 12HR1938 18AP1938 C. 01214 ) C.CC710 ) (46756 ( 1225 EV C 6 27AP1938 15MY1964 0.00336 ) 0.00392 ) 46761 1226 EV C 7 27MY1938 16MY1964 0.01090 ) 0.0038 1 ) (46766 ( 1230 EV E 2 140E1938 16MV1964 C. 03169 ) 0.00889 ) I 1231 ( 1240 E D 3 6 16MY1964 10JN1964 0.00734 ) 0.0C153 ) 1232 1243 E E 5 6 16MY1964 13JN1964 0.00174 ) 0.00209 ) ( 1236 ( 1244 C F 1 1 8JN1964 11JN1964 C.0C175 ) C.CC329 ) ( 1245 ( 1258 f F 2 1 11JN1964 6JL1964 0.00346 ) 0.00472 I 1246 1259 F F 3 2 11JN1964 6JL1964 0.00598 ) O.C0310 1 ( 1254 ( 1260 0 F 2 3 15JL1964 6JL1964 0.C0192 ) 0.00764 ) ( 1267 ( 1284 D E 6 6 18AU1964 17SE1964 0.00432 ) 0.00318 ) 1270 1285 F F 1 1 10AU1964 15SE1964 0.00272 ) 0.00582 ) ( 1272 ( 1298 C< E 1 1 10SE1964 120C1964 C.0C821 ) 0.00269 ) ( 1304 _L 134JL F A 1 3 110C1964 19AP1967 0.00494 1 0.00868 ) 1337 1342 C A 3 4 2MR1967 19AP1967 0.00147 ) 0.00361 ) ( 1338 ( 1347 C E 3 2 28MR1967 23AP1967 C.CC132 ) C.0C325 ) ( 1371 ( 1416 C E 3 5 4MY1967 28MY1967 0.00231 1 0.00656 ) 1373 1431 C A 7 3 5MY1967 12JN1967 0.00285 ) 0.00257 ) ( 1413 ( 1449 C C 7 3 25MY1967 16JU967 C. 00316 1 C.C0764 ) { 1452 ( 1378 E GS 2 2 14JL1967 SMY1967 0.00639 ) 0.00421 ) 1453 1386 E 3 GS10 15JL1967 12MY1967 0.00253 ) 0.00287 ) ( 1537 ( 1387 E 3 GS11 24SE1967 12MY1967 C.0C431 ) 0.02772 ) I 1388 1_UL9_Z _ GS12 _ CSi-4 . GS21 GS 9 12MY1967 12MY1967 13MY1967 40C1967 0.03017 1 0.0^157 1 0.00065 ) 0.00587 ) 1389 1394 GS13 GS18 12MY1967 13MY1967 0. 00774 ) O.C0860 ) ( 1390 ( 1396 GS14 GS20 12MY1967 13MY1967 C.CU74 ) C.0C222 ) ( 1397 ( 1561 1555 1567 GS 2 GS15 30C1967 50C1967 C. 00353 ) 0.00318 I ( 1559 ( 1569 GS 7 CS17 40C1967 50C1967 C.CC350 ) C.0C446 ) ( 1570 L 1573- GS - _ GS< MS RH L8 1 50C1967 60C1967 0.00992 ) 0.OC112 ) 1571 1575 GS19 GS28 60C1967 60C1967 COO 2 34 ) 0.01032 ) ( 1572 ( 1544 C-S >0 1 1 1 60C1967 20C1967 18SE1967 20SE1967 C.0C270 ) C.0C477 ) ( 1547 1 1522_ 1 1 20C1967 18SE1967 0.OC798 ) 0.04559 ) 1520 1526 HO MO 1 1 18SE1967 20SE1967 0.01414 ) 0.00569 ) ( 1521 ( 1527 SH TR C.CC577 ) 0.00629 ) ( 1529 ( 1549 KM MO 1 1 2CSE1967 40C1967 0.01199 1 0.06852 ) 1531 1550 GH MR 1 1 25SE1967 5CC1967 0.20287 ) C. 56994 ) ( 1545 ( 1428 1 2 20C1967 29MY1967 C.CC676 ) C. 09039 ) ( 1426 _ I .1417. MS HO RA . .IB_ GH MO 2 2 2 ? 2 2 29MY1967 2_2MY1967 25MY1967 __6.MX196J1 25AP1967 10MY1967 0.45144 ) 0.16824 ) 1351 1418 MI SH 2 2 21AP1967 22MY1967 0.05586 I 0.01555 ) < 1427 ( 1350 LU BH 2 2 29MY1967 19AP1967 C.C9685 ) C. 39867 ) ( 1425 _J -1-402 0.01768 ) . Q.._1.57.q.3 i_ - 0.19677 ) 0.29217 ) 1399 L_140.0.„ 1429 1405 PW SB 2 2 5KY1967 6MY1967 C.C1360 ) 1.90612 1 ( 1401 ( 1353 CO FR 2 2 6MY1967 23AP1967 C. 01764 I C. 01055 ) ( 1354 ( 1404 wl- ES 2 2 29MY1967 12MY1967 C. 07432 ) 0.03870 ) ( 1403 ( 14C6 CA C-B 2 2 10MY1967 13MY1967 0.C1308 ) C. 00539 ) ( 1423 WA 2 25MY1967 0.0C428 ) Synedra ulna var. aequalis (Kutz.) Hust. Frustulia aequalis KUtzing, Syn. Dial:., p. 18, fig. 30. 1834. Synedra ulna var. aequalis (Kiltz.) Hustedt in: Rabenhorst, Kryptog.-Fl. Deutschland, 7(2)2:199, fig. 691A, d. 1932. Valves linear without special morphological demarcation of the ends . Other characteristics essentially similar to the nominate variety. 684 SYUINAVA TCT NO CF STATIONS ( 3540 CH (-15.22 BH._1_ 11MY1879 ae.SE1967-- 0.00466 ) _Jk8fllS2_J_ (46743 ..I JL52.L. EV GH 1 20JN1937 25SE1967 0.01285 ) 0.00845 I (46747 ( 1350 EV 8H 2 1AU1937 19AP1967 C.CC743 ) C.C1982 ) Synedra ulna var. amphirhynchus (Ehr.) Grun. Synedra amphirhynchus Ehrenberg, Phys. Abh. Akad. Wiss. Berlin, 1841:425, pi. 3(1), fig. 25. 1843. Synedra ulna var. amphirhynchus (Ehr.) Grunow, Verh. Zool.-Bot. Ges. Wien, 12:397. 1862. Valves lanceolate with very narrow and much produced rostrate to capitate ends. Other morphologic features of the frustule and ornamentation of the valve essentially similar to the nominate variety. Specimens so far observed from Lake Michigan are in the lower size range (75-190p long). This entity is rare in our collections and the specimens observed are probably derived from periphyton communities. 688 SYULNAVM TOT NO OF STATIONS ( 3540 i_lA7_S_ CH GS 2„. 11MY1879 9MY1967 0.00932 ) 0.00421 ) ( 3541 1 1380 CH GS 4 1FE1881 9MY1967 C. 02935 ) 0.00168 ) ( 3507 ( 1393 CH CS17 19FE1881 13HV196? C. 01132 ) 0.00274 ) 195 Synedra ulna var. chaseana Thomas Synedra ulna var. ohaseana Thomas in toms, Ser. 1, p. 4, pi. 2, fig. 3. Walker and Chase, New and rare dia- 1886. Valves very elongate, narrowly linear-lanceolate, with slightly expanded, subcapitate ends which are cuneately rounded at the tip. Central area usually completely lacking, sometimes marked by a few less-developed striae in the mid-portion of the valve. Specimens from Lake Michigan 380-600+u long, only 3-5u broad. Striae coarse, 8-11 in lOu. This entity is euplanktonic and is abundant in many collections from Lake Michigan. It may be viewed as the extreme adaptation to planktonic existence in this group. In some respects its morphology is distinct from the S. ulna and some authors (Boyer 1927) consider it to be a separate species. 685 SYIIIMUC Tl-T HP. HF STATIONS 317 (60973 f.H JJ76 _ 0.25980 ) ( 3540 CH 11MY1879 2.02208 ) 3541 CH 1FE1881 8.92106 ) ( 3507 ( 4690.8- CH _CH_ 19FE1881 DE1945 2.51302 ) 0.93656 ) 146910 (46517 CH CH OC1945 12JA1946 C. 78101 ) 0.99114 ) 46921 46915 CH CH 23NQ1945 20FE1946 1.72348 ) 1.47954 1 C 46914 146970 CH CH 19AP1946 200E1946 0.34703 ) 0.32042 I (46924 (46SC5 CH CH 10MY1946 JA1947 0.41269 ) 0.51845 ) 46923 46909 CH CH 22N01946 MR1947 1.27858 ) 1.77588 ) (46912 146919 CH r,H CH FV EV FV AP1947 _ 50M1S4.7. 21AU1947 20JN1937 17JL1937 73AU1937 1.06933 ) 0.69043 ) (46S16 (46SC7 CH CH 4MY1947 JL1947 1.14680 ) 1.60262 ) 469C6 46913 CH CH MY1947 6AU1947 C. 73338 ) 1.63163 ) (46922 (46743 0.34652 ) 2.63766 1 (46758 (46745 EV EV 5JN1937 3JL1937 2.19670 ) 4.30512 ) 46771 46770 EV EV 11JN1937 9J11937 3.06215 ) 1.44322 ) (46764 146763 1.65995 ) 0.68994 1 (46757 (46765 EV FV 25JL1937 30AU1937 2.02205 ) 0.59119 1 46747 46769 EV FV 1AU1937 7SE1937 2.C7936 ) 1.43291 ) (46752 (46744 EV EV 15SE1937 60C1937 1.21898 ) 0.22435 I (46760 (46748 EV EV 22SE1937 130C1937 0.60564 ) 0.72588 1 46750 146767 EV FV 24SE1937 270C1937 C. 72583 1 C. 43325 ) (46749 (46751 EV EV 12MR1938 30KR1938 0.87389 1 2.30013 ) (46768 (46772 EV EV 16PR1938 18AP1938 1.17595 1 0.15614 ) 46762 46756 EV EV 18MR1938 27AP1538 3.46273 ) C. 51715 ) (46759 ( 1773 EV B i 19HY1938 18MY1964 0.24983 ) 1.42199 ) (46761 ( 1224 EV e 4 27HY1938 18MY1964 C. 86667 ) 2.19586 ) 46766 1225 EV C 6 14DE1938 15CY1964 0.47529 1 3.56723 ) ( 1226 ( 1779 C D 7 5 16MY1564 14MY1964 0.89041 ) 4.73663 ) ( 1227 ( 1230 c E 2 7 13MY1964 16MY1964 1.84231 ) 1.45207 ) 1228 1231 0 E 2 3 14MY1964 16KY1964 2.58861 ) 2.16711 ) ( 1232 ( 1235 E 0 5 7 16MY1964 16JN1964 2.75836 ) 1.84709 1 ( 1233 ( 1439 B e 3 6 5JN2964 5JN1964 2.33383 ) 1.77023 ) 1234 1236 B 3 1 18JN1964 8JN1964 0.78722 ) 1.51229 ) ( 1237 ( 1240 C P 2 6 8JN1964 10JN1964 3.06780 ) 2.00334 I ( 1238 ( 1241 D E 3 2 11JN1964 13JN1964 2.70800 ) 1.51699 1 1239 1242 D E 4 3 11JN1964 13JN1964 1.19060 ) 2.00632 1 ( 1243 ( 1246 E F 6 3 13JN1964 11JN1964 3.89627 ) 1.00400 1 < 1244 ( 1247 F 8 1 3 1UN1964 14JL1964 1.33110 1 1.39156 ) 1245 1248 F B 2 3 11JN1964 24JL1964 1.03727 ) 3.C3460 ) ( 1440 ( 1250 B C 6 6 1UL1964 10JL1964 3.61131 ) 5.36896 ) ( 1441 , ( 1251 e c 6 7 24JL1964 16JL1964 6.26886 ) 1.52095 1 1249 1252 C c 3 1 8JL1964 16JL1964 1.90114 ) 1.29986 ) ( 1253 ( 1256 c E 2 2 16JL1964 14JL1964 5.32682 ) 3.C776C 1 1 1254 ( 1257 0 E 2 3 15JL1964 I4JL1964 4.11032 ) 4.01962 ) 1255 1258 c F 5 1 15JL1964 6JL1964 6.46784 ) 2.2C403 ) ( 1259 ( 1262 F B 2 3 6JL1964 17AU1964 1.73525 ) 0.29399 ) ( 1260 1 1442 F 8 3 6 6JL1964 2AU1964 1.87176 ) 6.68714 ) 1261 1443 B e 3 6 2AU1964 16AU1964 C. 37287 ) 2.76756 ) ( 1263 ( 1266 C D 7 3 15AU1964 18AU1964 0.56045 ) 7.69608 1 ( 1264 ( 1267 C« 0 1 6 10AU1964 18AU1964 C.45181 ) 0.10808 ) 1265 1268 c E 2 2 10AU1964 15AU1964 4.69452 1 4.55569 ) ( 1269 ( 1271 E C 3 7 15AU1964 22SE1964 5.37192 ) 0.52882 i ( 1270 ( 1272 F C 1 1 10AU1564 10SE1964 1.04833 I 2.29857 ) 1444 1273 B C 6 2 19SE1964 10SE1964 7.63891 ) 3.76364 ) ( 1274 ( 1277 0 0 1 4 17SE1564 18SE1964 1.09792 ) 3.03631 1 ( 1275 ( 1278 0 0 2 6 17SE1964 18SE1964 1.06445 ) 2.86714 1 1276 1279 D E 3 1 18SE1964 16SE1964 13.C3C84 ) 2.19892 ) ( 1280 ( 17R3 E E 2 5 16SE1964 16SE1964 10.17088 1 10.87409 ) ( 1281 ( 1284 E E 3 6 16SE1964 17SE1964 11.16823 ) 0.66724 I 1282 1285 E F 4 1 16SE1964 15SE1964 8.26593 1 6.25473 ) ( 1286 I 1445 F R 2 6 15SE1964 14tlf.l964 6.12960 ) 0.68493 ) ( 1287 ( 1289 F c 3 7 15SE1964 140C1964 3.97318 ) 3.69377 ) 1288 1290 B C 3 1 15CC1964 16CC1964 C.C6313 ) 0.13644 ) ( 1291 ( 1794 C" 0 0 F 2 3 6 3 160C1964 150C1964 1.60951 ) 2.76890 ) ( 1292 ( 1295 0 0 1 4 150C1964 150C1964 0.14162 I 1.39137 1 1293 1296 0 0 2 5 15CC1964 140C1964 1.65079 ) 0.68852 ) ( 1297 ( 1300 140C1964 130C1964 3.01969 ) 9.37176 ) ( 1298 ( 1301 E E 1 4 12CC1964 13CC1964 0.65974 1 5.97898 ) 1299 1302 E E 2 5 120C1964 130C1964 4.53032 ) 4.72103 ) ( 1303 ( 1306 E F 6 3 130C1964 110C1964 2.89936 ) 2.84384 1 ( 1304 ( 1307 F B I 6 110C1964 NG1964 1.84234 ) 0.50512 ) 1305 1308 F C 2 7 U0C1964 6N01964 1.20760 ) 0.38626 ) ( 1309 ( 1317 C n 1 2 10NO1964 8NC1964 0.02733 ) 0.43458 ) I 1310 ( 1313 C« 0 2 3 10N01964 9N01964 0.34240 ) 1.35135 ) 1311 1314 0 0 1 4 8N01964 9NG1964 C. 24251 ) 1.48709 ) ( 1315 ( 1318 0 E 5 7 9ND1964 7N01964 1.16469 ) 1.77691 ) ( 1316 ( 1319 c E 6 3 9N01964 7N01964 3.34693 ) 2.68636 I 1317 1320 E E 1 4 6N01964 7N01964 C. 24891 ) 3.28025 ) ( 1321 1 1374 E F 5 7 7N01964 6NH1964 2.10049 ) 1.08541 1 ( 1322 ( 1325 E F 6 3 7N01964 6N01964 2.79935 1 1.49878 ) 1323 1336 F C 1 3 6N01964 27JA1967 C. 73171 ) C. 37163 ) ( 1337 1 1 340 C 3 7 2MR1967 7HMR1967 2.5367E 1 1.01804 1 ( 1338 ( 1341 C A 3 3 28KR1967 19AP1967 2.28222 } 1.56862 I 1339 1342 C A 5 4 28MR1967 19AP1967 2.91202 ) 2.6C950 1 1 1343 A r. 6 7 19AP1967 71AP1967 0.17785 1 2.11769 ) ( 1344 LJL347 C E 3 2 25AP1967 23AP1967 2.62387 ) 1.97382 1 1345 1348 C E 5 5 25AP1967 23AP1967 1.45411 I 0.89650 ) ( 1368 ( 1371 A r. 3 3 4MY1967 4MY1967 2.63902 1 2.15615 1 ( 1369 ( 1372 A C 4 5 4MY1967 5HY1967 2.60912 I 4.46872 ) 1370 1373 A C 6 7 3MY1967 5MY1967 C.40281 ) 2.66416 ) ( 1374 ( 1408 E A 2 3 7MY1967 23MY1967 4.04662 I 1.56508 1 ( 1375 ( 14C9 E A 3 4 7MY1967 23MY1967 4.04245 1 6.24888 1 1376 1410 6 5 6 6MY1S67 24MY1S67 1.96762 ) 1.44339 ) ( 1411 ( 1414 C F A r. 3 ? 3 5 31MY1967 78HY1967 6.12973 ) 5.32662 ) ( 1412 ( 1415 C E 5 3 31MY1967 28H.196 7 4.71420 ) 4.19571 ) 1413 1416 C E 7 5 25HY1967 28MY1967 2.50813 ) 2.96967 ) ( 1431 1 1434 12JN1967 17.IN1967 1.80240 ) 1.95598 1 ( 1432 ( 1435 A C 4 7 13JN1967 13JN1967 4.64902 ) 2.35532 ) 1433 1436 C E 3 2 17JN1967 15JN1967 3.91422 ) 6.41916 ) ( 1437 1 1447 E A 3 4 15JN1967 11.11 1967 5.27548 ) 3.7C977 1 ( 1438 ( 1448 E A 5 6 14JN1967 10JL1967 2.03341 I 1.81786 ) 1446 1449 A C 3 3 11JU967 16JL1967 1.36980 ) 6.C6061 ) ( 1450 1 1453 C F 5 3 16JL1967 15.11 1967 5.59840 I 4.60C26 ) ( 1451 ( 1454 C E 7 5 16JL1967 15JL1967 1.37790 1 1.12022 ) 1452 1504 E A 2 3 14JL1967 28AU1967 3.87448 ) 0.69127 ) ( 1505 A 4 28AU1967 0.07730 ) ( 1506 A 6 29AU1967 C. 01046 ) 1508 C 3 2SE1967 C. 69938 ) 196 1 1509 r. 5 2SF1967 1.76501 1 1510 r 7 29AII1967 n. 12967 1 1511 E 2 1SE1967 3.57921 1 1 1512 ( 1533 E A 3 4 1SE1967 19SE1967 8.61473 ) 0.03249 ) 1513 1534 E 5 A 6 31AU1967 19SE1967 5.90858 ) 0.00931 ) 1532 1535 A 3 C 7 18SE1967 20SE1967 C.C2628 I 0.04506 ) 1 1536 ( 1539 E r. 2 3 24SE1967 40C1967 3.43568 1 0.00503 ) 1537 1540 E 3 C 5 24SE1967 40C1967 11.27404 ) 0.01985 ) 1538 1541 E 5 E 2 23SE1967 110C1967 3.61266 ) C.5C024 ) ( 1542 1 1378 E GS 3 2 110C1967 9MY1967 4.50570 I 2.64917 ) 1543 1379 E 5 GS 3 100C1967 9MY196/ 0.25858 ) 0.33424 ) 1377 1380 GS 1 GS 4 9MY1967 9MY196? 5.35919 ) 1.25441 ) ( 1381 ( 1384 GS GS 5 8 10MY1967 10MY1967 1.11148 1 0.51761 I 1382 1385 GS 6 GS 9 10MY1967 10MY1967 0.64948 ) 1.21024 ) 1383 1386 GS 7 GS10 10MY1967 12MY1967 C. 58811 ) 0.60327 I ( 1387 ( 1390 GS11 GS14 12MY1967 12MY1967 2.21800 ) 0.19965 ) 1388 1391 GS12 GS15 12MY1967 12MY1967 2.74510 1 0.37351 ) 1389 1392 GS13 GS16 12MY1967 12MY1967 C. 33262 ) 0.08938 ) ( 1393 ( 1396 GS17 GS20 13MY1967 13MY1567 0.24107 ) 0.0C592 ) 1394 1397 GS18 GS21 13MY1967 13MY1967 0.05333 1 0.00523 ) 1395 1398 GS19 GS22 13MY1967 14MY1967 C. 00470 ) 1.56055 ) ( 1554 ( 1557 GS GS 1 4 30C1967 30C1967 3.32313 ) 0.57922 ) 1555 1558 GS 2 GS 5 30C1967 4CC1967 1.23588 1 0.67782 ) 1556 1559 GS 3 GS 7 30C1967 40C1967 0.07822 ) 0.53508 ) ( 1560 1 1563 GS 8 GSU 4QC1967 50C1967 0.33061 ) 1.30945 ) 1561 1564 GS 9 GS12 40C1967 50C1967 C. 37565 ) 0.02963 ) 1562 1565 GS10 GS13 50C1967 50C1967 0.86347 ) 0.03549 ) ( 1566 { 1569 GS14 GS17 50C1967 50C1967 0.36691 ) 0.06243 I 1567 1570 GS15 GS18 5CC1967 50C1967 0.81608 ) 0.06942 ) 1568 1571 GS16 GS19 50C1967 60C1967 C. 12698 ) C. 00820 ) I 1573 1 1544 GS21 mu i 60C1967 20C1967 0.0C672 ) 0.00715 ) 1574 1547 GS22 MS 1 6CC1967 20C1967 1.61077 1 0.11178 ) 1575 1546 GS28 tu 1 60C1967 20C196 7 C.C0903 ) C. 06002 ) ( 1520 1 1575 HO PW 1 1 18SE1967 20SE1967 0.00943 ) 0.05570 1 1521 1526 SH 1 MO 1 18SE1967 20SE19C7 0.005T7 ) 0.24464 ) 1523 1527 RA 1 TR 1 19SE1967 20SE1967 C. 00923 ) C. 07547 ) C 1528 1 154S se r.4 1 1 20SE1967 30C1967 0.23101 ) 0.01272 1 1529 1549 KM 1 MO 1 20SE1967 40C1967 C. 33577 I 0.32890 ) 1530 1551 FR 1 ES 1 24SE1967 50C1967 C. 35003 1 0.03994 ) { 1552 1 1428 SM MU I 7 6CC1S67 29MY1967 0.09904 ) 0.07533 ) 1550 1426 MR 1 MS 2 50C1967 29MY1567 0.04956 ) 1.79527 ) 1553 1351 SG 1 CI 2 60C1S67 21AP1967 C. 02938 ) C. 33204 ) ( 1427 1 1350 LU BH 2 2 29NY1967 19AP1967 4.39467 ) 0.35242 ) 1417 1425 HO 2 RA 2 22MY1967 25MY1967 0.02243 ) 0.50393 ) 1418 1399 SH 2 PW 2 22MY1967 5MY1967 C. 54432 ) 1.66621 ) ( 1401 ( 135? MO KW 2 2 6MY1967 21AP1967 0.75259 1 0.30064 ) 1402 1353 TR 2 FR 2 6MY1967 23AP1S67 0.57938 ) 3.25949 ) 1400 13 54 SB 2 GH 2 6MY1967 25AP1967 1.64999 ) C.C5696 ) ( 1429 i 1.4Q5 _ WL ES 2 7 29MY1967 12MY1967 0.45652 ) 0.07740 ) 1403 1407 CA 2 SM 2 10MY1967 14MY1967 0.62770 1 0.37619 ) 1404 1349 MQ 2 CI 2 10MY1967 19AP1967 C. 31758 ) C. 38437 ) ( 1406 _L .1.421. GB CH 2 ? 13HY1967 23MY1967 0.01348 ) 0.36433 ) 1419 1422 BU 2 GA 2 23MY1967 23MY1967 0.09154 1 0.12262 1 1420 1423 IH 2 WA 2 23MY1967 25MY1967 C.3C211 ) C.5C101 I 1 1424 KN 2 25MY1967 0.50626 ) 1430 MC 2 12JN1967 0.71552 1 Synedra ulna var. olavioeps Hust. Synedra ulna var. alaviaeps Hustedt, Arch. Hydrobiol., Suppl. 15:157, pi. 10, fig. 36. 1938. Valves linear with slightly expanded terminal portions and bluntly rounded ends. Striae coarse, usually 8-9 in lOu. Specimens from Lake Michi- gan 109-520y long. Some authorities have speculated that specimens having this morphology are auxospore stages of S. ulna. The size range of specimens noted in this study seems to preclude this possibility. 687 SYIJLNAVL TCT NC OF STATIONS 1 3540 _CJL 11MY1879 0.00932 ) 3541 CH 1FE1881 0.03913 1 (46909 CH 6 MR1947 30MR1938 10JN1964 0.00455 ) C46771 146756 EV EV 11JN1937 27AP1938 0.00475 I 0.CC840 I 46760 (46761 EV EV 22SE1937 27MY1938 0.00492 ) C. 01090 ) (46751 ( 1240 EV 0 0.01117 1 0.00307 1 ( 1250 ( 1260 C F 6 3 10JL1964 6JL1964 0.00411 I 0.02865 ) 1254 1266 0 0 2 3 15JL1964 18AU1964 0.00192 I 0.00351 ) ( 12 59 ( 1277 F 0 2 4 6JL1964 18SE1964 0.02169 ) O.C062C ) I 1279 ( 1286 E F E F 1 2 16SE1964 15SE1964 0.0C393 1 0.01095 I 1280 1287 E F 2 3 16SE1964 15SE1964 0.00681 ) 0.01001 1 ( 1285 ( 1298 F E 1 1 15SE1964 120C1964 0.02330 1 0. 00269 ) ( 1299 1 1306 2 3 120C1964 llOf.1964 0.00628 I 0.00277 1 13C0 1316 E 0 3 6 130C1964 9N01964 0.00716 ) 0.01133 ) I 1304 ( 1340 F C 1 7 110C1964 28MR1967 C. 00247 ) 0.00073 1 I 1342 1 1375 A F 4 3 19AP1967 7MY1967 0.00361 ) 0.00241 ) 1343 1408 A A 6 3 19AP1967 23MY1967 0.00139 ) 0.00894 ) ( 1374 ( 1431 E A 2 3 7MY1967 12JN1967 C.CC598 ) C. 00772 ) 1 1432 I 1446 A A 4 3 13JN1967 11JL1967 0.00255 1 0.00245 ) 1433 1448 c A 3 6 17JN1967 10JL1967 0. 01292 ) 0.00354 ) ( 1434 ( 1449 C C 5 3 17JM967 16JL1967 0.00299 I C. 00382 ) ( 1450 ( 1504 C A 5 3 16JL1967 28AU1967 0.00381 1 0.00247 ) 1451 1536 C E 7 2 16JL1967 24SE1967 0.00394 ) 0.00273 ) ( 1452 I 1537 E E 2 3 1 5 8 14JL1967 24SE1967 9MY1967 10MY1967 10MY1967 C.0C426 ) ( 1542 1 1379 E GS 3 3 110C1967 9MY1967 0.01526 I 0.00619 ) 1543 1380 E GS 5 4 100C1967 9MY1967 0.00718 ) 0.02186 1 ( 1377 ( 1381 GS GS C. 01187 } ( 1382 ( 1385 GS GS 6 9 10MY1967 10MY1967 0.02776 1 0.00942 ) 1383 1386 GS 7 GS10 10MY1967 12MY1967 0. 00535 ) 0. 01436 ) ( 1384 ( 1387 GS GS C.0C370 I ( 1388 1 1391 GS12 GS15 12MY1967 17MY1967 0.47C59 ) 0.15323 1 1389 1392 GS13 GS16 12MY1967 12MY1967 0.10572 ) 0.05239 I < 1390 ( 1393 GS14 GS17 12MY1967 13MY1967 0.09982 1 C. 16163 ) ( 1394 _L 1398 GS18 GS22 GS 7 GS15 13MY1967 14MY1967 0.02408 ) 0.01518 ) 1395 1554 GS19 GS 1 13MY1967 30C1967 0.00352 ) 0.00712 1 ( 1397 ( 1558 GS21 GS 5 13MY1967 40C1967 C. 00065 ) C. 00396 ) < 1559 I 1567 40C1967 50C1967 0.00699 I 0.02223 ) 1563 1569 GS11 GS17 50C1967 50C1967 0.00468 ) 0.00743 ) C. 00863 ) 0.01321 ) ( 1564 ( 1571 ( 1575 ( 1550 GS12 GS19 GS28 MR 1 50C1967 60C1967 60C1967 50C1967 C. 00165 ) ( 1573 1 1526 GS21 Mfl 1 60C1967 20SE1967 0.00112 I 0.00569 ) 1574 1552 GS22 SM 1 60C1967 60C1967 0.00645 ) C. 02478 ) ( 1428 1 1350 MU BH 2 ? 29MY1967 19AP1967 0.00603 ) 0.01762 ) 1426 1399 MS PW 2 2 29MY1967 5HY1967 0.05249 ) C.02O4O 1 ( 1427 ( 1401 ( 1419 IU MO BU 2 2 2 29MY1967 6MY1967 23MY1967 C. 02421 ) C. 01176 I C. 01831 ) C 1402 TR 2 6MY1967 0.00541 ) 1400 SB 2 6MY1967 0.01787 1 Synedra ulna var. oonstvvota Venkt. Synedra ulna var. aonstriota Venkataraman, Proc, (B6):308, fig. 36. 1939. Indian Acad. Sci., 10 197 Valves relatively broadly lanceolate, constricted in the center, with narrowly produced, rostrate ends. Specimens from Lake Michigan 75-180u long, 6— 8y broad. Central area more or less elliptical, either reaching to the margins of the valve or bordered by shortened striae. Striae somewhat finer than in the nominate variety, 10-13 in lOu. This entity is abundant and widely distributed in periphyton collections. Occasional specimens are noted in plankton collections from Lake Michigan. Its distinctive morphology may warrant its treatment as a separate species. 691 SYUtNAVC TCT NC OF STATIONS ~ 7 (46923 (. 1522 CH BH 1 22N01946 18SE1967 0.00437 ) 0.0C182 I (46758 ( 1531 ev GH 5JN1937 25SE1967 0.00357 I 0.00845 ) ( 1388 ( 1550 GS12 KR 1 12HY1967 50C1967 C. 00603 ) C. 04956 1 29MY1967 0.00301 1 Synedva ulna var. danioa (Kutz.) V. H. Synedva danioa Kutzing, Bacill., p. 66, pi. 14, fig. 13. 1844. Synedra ulna var. danioa (Kutz.) Van Heurck, Syn. Diat. Belgique, p. 151. 1885. Valves elongate, linear-lanceolate with protracted, subcapitate ends. Specimens from Lake Michigan 180-350y long, 5-6y broad. Striae coarse, 9-11 in lOu. Central area usually present, rather small and rectangular in out- line, sometimes containing faint ornamentation with the appearance of par- tially developed striae. This entity is common in our collections from Lake Michigan, especially those taken from areas that have undergone enrichment. In some respects, it resembles S. ulna var. ohaseana but may be distinguished from that taxon by its slightly broader valves, the presence of a central area and the shape of the ends of the valves which are smoothly rounded rather than more or less lanceolate as in S. ulna var. ohaseana. In several of our collections from Lake Michigan populations of S. ulna var. danioa occur together with unusual specimens with elongate expanded ends similar to the specimens Gemeinhardt (1926) cites as "regeneration forms." 686 SYULNAVD 70T KC CF STATICNS 306 160973 ( 3507 CH r.H 1876 19FE1881 0.04724 ) 0.01132 ) ( 3540 (46910 CH CH 11HY1879 0C1945 C. 07455 > 0.07100 ) I 3541 (46921 CH CH 1FE1881 23N01945 C. 36193 1 0.10477 1 (46908 (46914 CH CH DE1945 19AP1946 0.05035 ) 0.45167 ) (46S17 (46924 CH CH 12JA1946 10KY1946 0.09898 ) 0.15097 1 (46915 (46923 CH CH 20FE1946 22N01946 C. 33574 ) 0.03497 ) (46920 (4691? CH r.H 20DE1946 AP1947 0.06655 ) 0.13798 ) (46505 (46916 CH CH JA1947 4HY1947 0.03922 1 0.17643 ) (469C9 (46906 CH CH HR1947 MY 1947 C. 11839 ) 0. 10354 I (46919 (4697? CH CH 5JN1947 21AU1947 0.02883 I 0.03829 1 (46507 (46758 CH EV JL1947 5JN1937 0.54489 ) 0.08559 ) (46913 (46771 CH EV 6AU1947 11JN1937 C. 03138 ) 0.14740 ) (46743 (46764 EV EV 20JN1937 17JL1937 0.26548 ) 0.10475 1 (46745 (46757 EV EV 3JL1937 25JL1937 0.35528 1 0.13480 ) (46770 (46747 EV EV 9J11937 1AU1937 0.01193 1 C. 33171 ) (46763 (46752 EV EV 23AU1937 15SE1937 0.06088 ) 0.04354 ) (46765 (46760 EV EV 30AU1937 22SE1937 0.02789 I 0.03447 ) (46769 (46750 EV EV 7SE1937 24SE1937 0.08684 1 0.22623 ) (46744 (46749 EV EV 60C1937 12MR1938 0.54623 1 0.48550 ) (46748 (46768 EV EV 130C1937 16HR1938 0.44833 ) 0.16169 ) (46767 (46762 EV EV 270C1937 18MR1938 0.01547 ) C.C6617 ) (46751 (46759 EV EV 30MR1938 19MY1938 0.22331 1 0.06752 1 (46772 146761 EV EV 18AP1938 27MY1938 0.06388 ) 0.50692 1 (46756 (46766 EV EV 27AP1938 140E1938 0.03694 ) C.C4753 ) ( 1223 ( 1??A B r. 3 7 18MY1964 16MY1964 0.C3750 ) 0.33486 ) ( 1224 ( 1227 B C 4 2 18MY1964 13HY1964 0.05294 ) 0.02632 I ( 1225 ( 1228 C 0 6 2 15MY1964 14XY1964 C. 42336 1 0.10315 1 ( 1229 D 5 14MY1964 0.36159 ) ( 1230 E 2 16MY1964 5JN2964 0.21633 ) 0.05239 ) I 1231 ( 1234 E B 3 3 16MV1964 18JN1964 0.33265 ) 0.11527 ) ( 1235 ( 1237 ( 1240 c c< D 7 2 6 16JN1964 8JN1964 0.04236 I 0.16495 ) ( 1439 ( 1238 B D 6 3 5JN1964 11JN1964 0.04995 ) 0.16600 ) ( 1236 ( 1239 C« 0 1 4 8JK1964 11JN1964 C. 11027 1 0.C615C I 10JN1964 0.13499 ) 0.73081 ) ( 1241 ( 1244 E F 2 1 13JN1964 11JN1964 C. 12568 ) 0.06908 ) ( 1242 ( 1245 E r 3 2 13JN1964 11JN1964 0.19033 ) C. 30427 ) ( 1246 F 3 11JN1964 0.37053 ) 0.09950 ) ( 1247 ( 1441 B B 3 6 14JL1964 24JL1964 C. 07257 ) C. 11674 ) ( 1248 ( 1249 B C 3 3 24JL1964 8JL1964 C. 16355 ) 0.04617 ) ( 1250 c 6 10 JL 1964 0.C7400 ) C. 13465 ) ( 1251 ( 1254 C D 7 2 16JU964 15JL1964 0.03766 1 0.18004 ) ( 1252 ( 1255 C C 1 5 16JL1964 15JL1964 C.C2232 > 0.11550 1 ( 12 56 ( 1259 ( 1262 ( 1264 E F B <■■• 2 2 3 1 14JL1964 6JU964 17AU1964 10AU1964 0.25647 1 0.25719 ) 0.00630 I J.03282 1 ( 1257 ( 1260 ( 1442 ( 1265 E F 3 3 14JL1964 6JL1964 0.22491 ) 0.26739 ) 1 1258 ( 1261 F B 1 3 6JL19 64 2AU1964 C. 25486 ) 0. 00981 ) 8 C 6 2 2AU1964 10AU1964 0.05800 ) 0.07824 1 ( 1263 ( 1266 C 0 7 3 15AU1964 18AU1964 0.C1201 ) C. 22450 ! 198 I 1267 ( 1270 0 F 6 I 18AU1S64 10AU1964 0.01513 I ( 0.09258 1 ( 1268 1444 E B 2 6 15AU1964 19SE1964 C. 70030 ) C. 16066 I ( 1269 ( 1272 E C D D B 1 2 6 15AU1964 10SE1964 17SE1964 18SE1964 C.35356 I C. 01231 ) ( 1273 ( 1276 C 0 2 3 10SE1564 18SE1964 0.01613 ) 0.45820 ) 1274 1277 D 0 1 4 17SE1964 18SE1964 0.04223 ) C. 03718 1 t 1275 < 1278 C.C2580 1 0.29594 ) ( 1279 ( 1282 E E 1 4 16SE1964 16SE1964 0.02356 1 0.14404 ) 1 1280 1283 E E 2 5 16SE1964 16SE1964 C. 32678 ) 0.66201 ) ( 1281 ( 1284 E E 3 6 16SE1964 17SE1964 C. 31786 ) C. 05719 1 ( 1285 F B 1 6 15SE1964 140C1S64 0.43096 1 ( 0.02283 ) 1286 1289 F C 2 7 15SE1964 140C1964 0.14229 ) 0.06 596 I ( 1287 ( 1290 F C 3 1 15SE1964 160C1964 C. 10508 1 C.CC758 ! ( 1291 1 1295 C D E E 2 4 1 4 160C1564 150C1964 0.0C978 1 0.06541 ) 1293 1296 0 0 2 5 150C1964 140C1964 120C1964 130C1964 C. 01887 ) 0.05115 ) 0.04398 ) 0.15386 1 ( 1294 I 1297 { 1300 ( 1303 D 0 E E 3 6 3 6 150C1964 140C1964 130C1964 130C1964 C.C4615 ) C. 14089 ) ( 1298 ( 1301 120C1S64 130C1964 C. 01077 I 0.61821 ) 1299 13C2 E E 2 C. 45463 ) C. 17911 ) 1 1304 L X307 F B D 1 6 2 5 110C1964 N01964 8N01964 9N01964 0.20498 ) 0.00722 1 1305 1308 F C 2 7 110C1964 6N01964 0.12766 ) 0.02129 ) I 1306 I 1310 F C< 3 2 110C1964 10N01964 C. 10810 ) C.CC227 ) ( 1312 1 1115 0.C0310 I 0.022.75 ) 1313 1316 0 c 3 6 9N01964 9N01964 C. 02510 ) 0. 18888 ) ( 1314 ( 1317 0 E 4 1 9N01964 6N01964 0.04306 ) 0.0C191 ) ( 1318 r 1371 E E 2 5 7N01964 7N01964 0.02093 1 0.04469 1 1319 1322 E E -3 6 7N01964 7N01964 0.02880 ) C. 12664 ) ( 1320 ( 1323 E F 4 1 7N01964 6 NO 1964 0.C8687 ) 0.02509 ) ( 1324 J_i331 F C 2 3 6N01964 2MR1967 0.03028 ) 0.51441 ) 1325 1338 F C 3 3 6N01964 28MR1967 0.12595 ) 0.33850 ) ( 1336 ( 1339 C C 3 5 27JA1967 28MR1967 C. 02118 I C. 72956 ) ( 1340 L 1343 c 7 6„ 28MR1967 19AP1967 0.50902 ) 0.48632 ) 1341 1344 A C 3 3 19AP1967 25AP1967 0.60749 ) 0.63694 ) ( 1342 ( 1345 A C 4 c 19AP1967 25AP1967 C. 25265 ) C. 45611 ) ( 1346 ( 1368 C A 7 3 21AP1967 4MY1967 0.93467 1 1.42947 ) 1347 1369 E A 2 4 23AP1967 4MY1967 0.34144 ) 1.82638 ) ( 1348 ( 1370 E A 5 6 23AP1967 3MY1967 C. 31254 ) 1.39487 ) ( 1371 1 1374 C F 3 ? 4MY1567 7MY1967 2.26234 ) 1.39271 1 1372 1375 C E 5 3 5MY1967 7MY1567 0.99305 ) 0.92639 ) < 1373 ( 1408 C A 7 3 5MY1967 23MY1967 C. 59901 ) 2.67406 ) ( 1409 J J.4JL2_ A _C_ 4 5 23MY1967 31MY1967 1.14563 ) 0.96493 ) 1410 1413 A C 6 7 24MY1967 25HY1967 3.15742 1 1.21616 ) ( 1411 ( 1414 C E 3 2 31MY1967 28MY1967 2.15402 ) C.94039 ) I 1415 E A 3 4 28MY1967 13JN1967 1.3625S 1 2.1457C I 1416 1433 E C 5 3 28MY1967 17JN1967 C. 19900 ) 3.31998 ) ( 1431 ( 1434 A C 3 5 12JN1967 17JN1967 1.56037 ) 1.67484 1 1 1435 { 1438 C E 7 5 13JN1967 14JN1967 1.02927 ) 0.43210 ) 1436 1446 E A 2 3 15JN1967 11JL1967 2.36648 1 0.57238 1 1 1437 ( 1447 E A 3 4 15JN1967 11JL1967 C. 47103 ) 5.99270 1 ( 1448 I 1451_ A C 6 7 10JL1967 16J1.1967 0.36074 ) 1.28735 ) 1449 1452 C E 3 2 16JL1967 14JL1967 1.60495 ) 0.49815 ) ( 1450 < 1453 C E 5 3 16JL1967 15JL1967 1.42055 1 C. 64707 ) ( 1454 ( 1506 E A C E 5 6 7 5 15JL1967 29AU1967 1.0282C ) 0.05754 ) 1504 1508 A C 3 3 28AU1967 2SE1967 0.31354 ) 0.21181 ) 1 1505 ( 1509 A C 4 5 28AU1967 2SE1967 0.C1031 ) C. 54507 ) ( 1510 ( 1513 29AU1967 31AU1967 0.04742 I 0.24323 1 1511 1532 E A 2 3 ISE1967 18SE1967 0.53719 ) 0.02957 ) ( 1512 ( 1533 E A 3 4 1SE1967 19SE1967 1.00518 ) C. 01393 ) < 1534 ( 153J A £ 6 3 19SE1967 24SE1967 0.00931 ) 1.40602 ) 1535 1538 C E 7 5 20SE1967 23SE1967 0.00322 ) 0.35353 ) ( 1536 ( 1540 E C 2 5 24SE1967 40C1967 C. 38174 ) 0.00496 ) ( 1542 ( 1378 E GS 3 2 110C1967 9MY1967 0.24410 ) 1.07649 ) 1543 1379 E GS 5 3 100C1967 9MY1967 0.03591 ) C. 5 1993 ( I 1377 ( 1380 GS GS 1 4 9MY1967 9MY1967 2.9527C ) C. 94165 ) I 1381 GS 5 GS 8 GS11 GS14 10MY1967 10MY1967 0.46033 ) 0.36972 ) 1382 1385 GS GS 6 9 10MY1967 10MY1967 0.53568 ) 1.31855 ) ( 1383 ( 1386 GS 7 GS1C 10MY1967 12MY1967 C. 41435 ) C. 25302 ) ( 1387 t 13 9£ 12MY1S67 12MY1S67 1.01394 I 2.05520 ) 1388 1391 GS12 GS15 12MY1967 12KY1967 2.81146 ) 2.46133 ) ( 1389 ( 1392 GS13 GS16 12MY1967 12MY1S67 C. 99270 1 1.07868 ) ( 1393 1 1396 GS17 cspn 13MY1967 13MY1967 1.40806 ) n. 01332 l 1394 1 1397 GS18 __Ci21 13MY1967 0.52293 1 0.00523 I ( 1395 ( 1398 CS19 C-S22 13MY1967 14MY1967 C. 20081 1 1.41482 ) ( 1554 ( 1557 GS GS 1 4 30C1967 30C1967 0.26329 ) 0.17937 1 ( 1555 ( 1558 GS GS 2 5 30C1967 40C1967 0.12712 ) 0.06739 ) ( 1556 ( 1559 GS GS 3 7 30C1967 40C1967 C. 09386 ) C. 54207 ) { 1560 I 1563 GS 8 GS11 40C1967 50C1967 0.19364 ) 0.51443 ) ( 1561 1 1564 GS 9 GS12 40C1967 50C1967 C. 14087 ) 0.00988 ) ( 1562 1 1565 GS10 GS13 50C1967 50C1967 C. 63157 ) C. 02028 1 ( 1566 ( 1569 GS14 GS17 50C1967 50C1967 0.19263 ) 0.29730 ) ( 1567 ( 1570 GS15 GS18 50C1967 50C1967 0.81608 ) 0.21817 ) ( 1568 ( 1571 GS16 GS19 50C1967 60C1967 C. 28860 ) C. 01815 I ( 1573 ( 1544 GS21 MU I 60C196 7 20C1967 0.01680 ) 0.00238 I ( 1574 ( 1547 GS22 MS 1 60C1967 20C1967 0.37105 ) 0.02395 I ( 1575 ( 1546 GS26 LU 1 60C1967 20C1967 C. 07354 ) C. 01000 I ( 1520 J_JL5_26. HO MO 1 I 18SE1967 20SE1967 0.05186 ) 0.29584 1 1521 ( 1527 SH TR 1 1 18SE1967 20SE1967 0.02308 ) 0.23899 ) I 1525 I 1528 PM SB 1 1 20SE1967 20SE1967 C. 02785 ) 0.11551 ) 1 1530 I 1549 FR MO 1 1 24SE1967 40C1967 0. 25002 ) 0.19186 ) ( 1531 ( 1551 GH ES 1 1 25SE1967 50C1967 0.04227 ) 0.03994 t ( 1545 ( 1552 WL SM 1 1 20C1967 60C1967 C. 02027 I 0.07923 ) ( 1550 ( 1426 MR MS 1 2 50C1967 29MY1967 0.16107 I 0.83990 ) 1553 ( 1351 SG MI 1 2 60C1967 21AP1967 C. 02938 > C. 2 2964 ) ( 1428 < 1427 MU LU 2 2 29MY1967 29MY1967 0.12655 I 1.41646 ) I 1417 ( 1425 HO RA 2 2 22MY1967 25MY1967 0.59818 I 0.50393 1 ( 1418 I 1401 SH MO 2 2 22MY1967 6MY1967 1.83515 ) 0.47037 ) ( 1350 I 1402 BH TR 2 ? 19AP1967 6MY1967 C. 23568 ) C. 24908 ) ( 1400 1 1354 SB GH 2 2 6MY1967 25AP1967 1.14367 1 0. 05006 ) ( 1352 ( 1429 KM WL 2 2 21AP1967 29MY1967 0.32640 ) 0.19110 1 I 1353 ( 1403 FR CA 2 2 23AP1S67 10MY196 7 0.36920 ) C. 68001 ) C 1404 ( 1349 MO CI 2 2 10MY1967 19AP1967 2.17226 ) 0.49932 1 1405 14C6 ES GB 2 2 12MY1967 13MY1967 0.16125 ) 0.00270 I ( 1407 1 1419 SH eu 2 2 14MY1967 23MY1967 0.25676 ) 3.51520 ) ( 1420 ( 1423 IH WA" 2 2 23MY1967 25KY1967 2.73414 ) 0.82216 ) 1421 1424 CH 2 2 23MY1967 25MY1967 2.58501 ) 0.75939 1 ( 1422 ( 1430 GA MC 2 2 23MY1967 12JM967 1.96189 ) 0.93758 I Synedra ulna var. longissima (Wm. Smith) Brun Synedva longissima Wm. Smith, Syn. British Diat., vol. 1, p. 72, pi. 12, fig. 95. 1853. Synedra ulna var. longissima (Wm. Smith) Brun, Diat. Alpes Jura, p. 126, pi. 4, fig. 21. 1880. Valves linear to linear-lanceolate with expanded, bluntly rounded ends. Frustules are often extremely elongate and many are more or less curved. Other features as in the nominate variety. 689 SYULNAVB TOT NO CF STATIONS 3 ( 1568 GS16 50C1967 0.00144 ) ( 1403 CA 2 10MY1967 0.09154 ) I 1404 MQ 2 10MY1967 C. 22866 ) 690 SYULNAVN TCT NO OF STATIONS 3 ( 1522 BH 1 18SE1967 0.48686 ) ( 1531 GH 1 25SE1967 8.25021 I ( 1350 BH 2 19AP1967 C.C2423 > 199 Synedra ulna var. oxyrhynohus (Kutz.) V. H. Synedra oxyrhynohus Kutzing, Bacill., p. 66, pi. 14, fig. 8. 1844. Synedra ulna var. oxyrhynohus (Ktltz.) Van Heurck, Syn. Dlat. Belgique, p. 151. 1885. Valves linear with narrowly rostrate apices. The maximum length of this entity is less than 150u and the striae tend to be finer than in the nominate variety, usually about 14-15 in lOu. 693 SYUINAVX roT NO OF STATIONS 11 (46916 CH (46907 CH 4MY1947 JL1947 0.00034 ) 0.00049 I (465C6 (46922 CH CH HY1947 21AU1947 0.00066 ) 0.00048 ) (46919 (46743 CH EV 5JN1947 20JN1937 C.0C303 ) C. 01285 ) ( 1257 E 3 ( 1426 MS 2 14JL1964 29KY1967 0.00239 1 0.02100 I ( 1394 ( 1427 Gsie LU 2 13HY1967 29HY1967 0.00344 ) 0.01211 ) ( 1395 ( OS 19 13MY1967 C. 00235 ) Synedra ulna var. spathulifera (Grun.) V. H. Synedra spathulifera Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 38, fig. 4. 1881. Synedra ulna var. spathulifera (Grun.) Van Heurck, Syn. Diat. Belgique, p. 151. 1885. Valves linear through most of their length, at the ends broadly expanded to a width greater than the center of the valve, then abruptly narrowed to produced, subcapitate ends. Other features of the morphology and ornamenta- tion of the frustule are essentially similar to the nominate variety. This entity is common in some periphyton collections from Lake Michigan. It is rarely taken in plankton collections and the specimens observed in our collections are undoubtedly derived from benthic habitats. As pointed out by other authors (Boyer 1927; Hustedt 1932) this entity is not related to the "regeneration forms" discussed above. 695 SYULNAVS TCT KC OF STATIONS 8 (46767 EV 27CC1937 0.00387 ) ( 1258 F 1 6JL1964 0.00236 ) ( 1567 GS15 50C1967 C. 00159 1 ( 1522 BH 1 1 1417 HO 2 18SE1967 0.00912 ) 22MY1967 0.00374 ) ( 1531 1 1350 GH 1 BH 2 25SE1967 19AP1967 0.10144 ) 0.02203 ) ( 1553 ( SG 1 60C1967 C.C1469 ) Species inoertae sedis Synedra sp. (aff . S. hyperborea var. rostellata) *74 SVHVPFUB Tf,T Kfl TF STATICKS 46908 CE1945 0.01007 ) 20FE1946 0.00569 ) 4HY1947 C. 00034 ) 0.00048 ) 24JL1964 0.CC22C ) 46749 1257 EV E 3 12MR1936 14JU964 0.01214 ) 0.00239 ) 46761 1258 EV F_ 27MY1938 6JL1964 00818 I OC706 I 1259 1291 F 2 C 2 6JL1964 160C1964 0.00310 ) 0-0C245 ) 1260 1299 F 3 E 2 6JL1964 120C1964 0.00382 ) C. 00943 I 1264 1300 C 1 E 3 10AU1964 130C1964 0C193 ) 0C358 1 130C1964 8N01964 0.00560 ) 0.00516 I 13C5 1315 F 2 0 5 110C1964 9N01964 0.00345 I C.C1365 I 1307 1319 B 6 E 3 N01964 7N01964 CC361 ) 0C524 ) 1320 _13A8_. E 4 E 5 7N01964 23AP1967 0.00620 ) 0.00137 1 1321 1370 E 5 A 6 7N01964 3MY1967 0.00638 ) 0.00460 > 1347 1376 E 2 E 5 23AP1967 6MY196 7 CC650 ) CC281 ) 1432 1361 GS 5 13JN1967 10MY1967 0.00255 ) 0.00954 ) 1448 1382 A 6 GS 6 10JL1967 10MY1967 C. 00354 ) 0.00278 ) Synedra sp. #7. 704 SYSPEC0G TCT NO OF STATIONS 7 (46915 CH 5JN1947 C.001S2 ) 17SE1964 0.00318 I ( 1236 ( 1285 C 1 F 1 8JN1964 15SE1964 C. 01050 ) 0.03494 ) ( 1243 ( 1287 E 6 F 3 13JN1964 15SE1964 C.CC209 ) 0.00500 ) ( 1382 GS 6 10KY1967 0.00278 ) ( 200 Synedra sp. #12. 70.9 --lY.S£iinL_ICX_.NC . CF_STJTJONS __._1 ( 1315 D__5_ 9JJ0.1964 Q. 00 45 5 J L Synedra sp. #13. 710 SYSPECOM TCT NO OF STATIONS 1 ( 1258 E_i 6JL1964 0.CC472 ) <_ Synedra "capitata var. fossilis" (not validly described), _6_fc7 SYCAPIVF TCT NC OF STATIONS J_1.40__ SB 2 6MY1967 0.0C596 ) Genus Tabellar-ia Ehr. Ehrenberg, Ber. Akad. Wiss. Berlin, 1840:217. 1840. All members of the genus Tabetlaria reported below occur in plankton collections from Lake Michigan in abundance. The populations observed are highly variable and specific determinations are often obtained with difficulty. It: appears probable that some of these variable populations may contain more than one genetic entity, however we have found no way that they can be con- sistently separated on the basis of morphologic characteristics visible with the light microscope. Knudson (1952) has revised the genus, largely on the basis of the type of colony formation. In our experience this is the least stable of all morphologic characteristics. Any of the entities reported be- low will, in some instances, adopt any or all of the colony forms reported by Knudson. Tabetlaria fenestrata (Lyngb.) Kutz. Diatoma fenestration Lynghye, Tent. Hydropht. Danicae, p. 180, pi. 61, fig. E(3). 1819. Tabetlaria fenestrata (Lyngb.) Kutzing, Bacill., p. 127, pi. 18, fig. 2. 1844. Cells in girdle view elongate-rectangular with rounded ends, united by gelatinous pads at the corners into zig-zag or, more rarely, linear or stel- late colonies. Usually four conspicuous septae, lying in the valvar plane, are evident. Valves elongate, linear, slightly expanded at the middle and at the ends. Expanded areas subequal, middle only slightly broader than the ends. Valves of specimens from Lake Michigan 24-134y long, 4-8u broad at the middle. Striae fine, 18-22 in lQy, perpendicular to the midline through- out. Axial area narrow, linear, without any specially demarcated central area. At the ends of the valves there are pore fields composed of very fine and irregularly arranged puncta. A conspicuous slime pore is present just to one side of the axial area near the center of the valve. In some populations very fine marginal spines are present at the margins of the valve. 711 TAFENEST TCT NC fiF STATIONS.. .3.20 _16.09.73 CH 1876.___.?_i8488__.>_ <__3540 CH _ J1MY1879 52.13623 ) < 3541 CH 1FE1881 53 07639 I < 35°7 CH 19FE1881 69.66266 I (46910 CH __" 0C1945 UZTTiiTV "(46921 CH "23N0 194« 4 46599 """) « 46908 CH CE1945 37.96576 ) (46<_7 CH 12JA1946 34.79790 I (46915 CK 20FE1946 '0 14283 C46914 CH 19AP1946 15.09508 ! (46924 CH "" 10MYT946 8.505713") (46923 CH 22NC1946 21* 87785 T i46920_ CH AQM1946 _10_.JB.5435__> (46SC5 CH JA1947 29.91420 ) (46909 CH HR1947 42 02904 146912 CH AP1947 11.95815) (46516 CH " " '4NY1947 -6704276")" T46906 CH MY1947 2 9^662 (46919 CH 5JN1947 3.79660) (46907 Ch JL1947 23.87903 ) (46913 CH 6AU1947^_ll"J3237 ) 201 (46922 CH 21AU1S47 33.39197 1 146758 EV 5JN1937 11.08337 I (46771 EV 11JN1937 3.46156 ) ' (46743 EV 20JN1937 18.22385 I 146745 EV 3JL1937 28.67293 ) (46770 EV 9JU937 39.40839 1 (46764 EV 17JL1937 18.72682 1 (46757 EV 25JL1937 32.62241 1 (46747 EV 1AU1937 16.91214 ) (46763 EV 23AU1937 26.13635 1 (46765 EV 30AU1937 44.66257 1 (46769 EV 7SE1937 21.88449 1 (46752 EV 15SE1937 19.50369 1 (46760 EV 22SE1937 18.47456 1 (46750 EV 24SE1937 le. 73969 ) (46744 EV 60C1937 12.01717 1 (46748 EV 13CC1937 1.19556 ) (46767 EV 270C1937 6.06553 ) (46749 EV 12HR1938 7.13679 ) (46768 EV 16KR1938 6.58533 1 (46762 EV 18MB1938 8.02823 ) (46751 EV 30MR1938 4.06431 ) (46772 EV 18AP1938 3.57700 ) (46756 EV 27AP1938 2.16263 ) (46759 EV 19MY1938 4.15935 ) (46761 EV 27MY1938 15.26218 ) (46766 EV 14DE1938 11.53359 ) < 1223 B 3 18MY1964 6.54270 ) ( 1224 B 4 18MY1964 7.68552 1 ( 1225 C 6 15MY1964 22.77538 ) l 1226 C 7 16KY1964 31.96346 ) 1 1227 C 2 13PY1964 40.76105 ) ( 1228 D 2 14MY1964 27.79344 ) ( 1229 0 5 14MY1964 26.C5147 1 ( 1230 E 2 16MY1964 24.23766 1 ( 1231 E 3 16MY1964 8.C8874 ) ( 1232 E 5 16MY1964 21.12769 ) ( 1233 6 3 5JN2964 25.67216 I ( 1234 8 3 18JN1964 32.66982 ! ( 1235 C 7 16.IN1964 41.51721 1 ( 1439 B 6 5JN1964 14.68531 ) ( 1236 C 1 8JN1964 26.71007 ) ( 1237 C 2 8JN1964 34.46764 ) ( 1238 0 3 11JN1964 8.96000 ) ( 1239 D 4 11JN1964 22.82564 ) ( 1240 0 6 10JN1964 16.42863 ) 1 1241 E 2 13JN1964 12.21279 1 ( 1242 E 3 13JN1964 2.51776 ) ( 1243 E 6 13JN1964 17.97794 1 ( 1244 F 1 UJN1964 39.52721 ) ( 1245 F 2 11JN1964 45.56575 ) ( 1246 F 3 11JN1964 44.34351 ) ( 1247 B 3 14JL1964 34.95966 1 ( 1248 B 3 24JL1964 35.58760 1 ( 1440 B 6 11JL1964 19.60422 ) ( 1441 B 6 24JL1964 12.79764 ) ( 1249 C 3 8JL1964 32.12927 ) 1 1250 C 6 10JL1964 14.10072 ) I 1251 C 7 16JH964 40.55855 ) ( 1252 C 1 16J11964 38.85634 ) ( 1253 C 2 16JL1964 21.24794 I ( 1254 D 2 15JL1964 8.84888 1 ( 1255 0 5 15JL1964 6.46784 ) l 1256 E 2 14JL1964 13.59273 ) ( 1257 E 3 14JL1964 3.01471 ) ( 1258 F 1 6JL1964 15.32651 ) ( 1259 F 2 6JL1964 19.73846 i ( 1260 F 3 6JL1964 25.40251 1 1 1261 B 3 2AU1964 38.46455 ) ( 1262 B 3 17AU1964 14.8467C ) ( 1442 B 6 2AU1964 20.30023 ) ( 1443 B 6 16AU1964 9.96323 ) ( 1263 C 7 15AU1964 28.58286 ) ( 1264 C 1 10AU1964 36.62727 ) ( 1265 C« 2 10AU1964 30. 20142 ) ( 1266 0 3 18AU1964 11.54062 ) ( 1267 0 6 18AU1964 43.57976 1 ( 1268 E 2 15AU1964 15.12747 ) ( 1269 E 3 15AU1964 5.56378 ) ( 1270 F 1 10AU1964 17.91695 ) ( 1444 B 6 19SE1964 11.45836 1 ( 1271 C 7 72SE1964 68.55127 I ( 1272 C 1 10SE1964 28.73209 1 ( 1273 C 2 10SE1964 21.45276 ) ( 1274 0 1 17SE1964 28.90254 1 ( 1275 0 2 17SE1964 23.93393 ) ( 1276 0 3 18SE1964 23.46892 1 ( 1277 D 4 18SE1964 49.44850 1 ( 1278 0 6 18SE1964 52.99973 ) ( 1279 E 1 16SE1964 28.86087 ) ( 1280 E 2 16SE1964 11.91368 ) ( 1281 E 3 16SE1964 8.79017 ) ( 1282 E 4 16SE1964 27.14680 ) ( 1283 E 5 16SE1964 18.45041 ) ( 1284 E 6 17SE1964 17.57060 ) ( 1285 F 1 15SE1964 11.41459 1 ( 1286 F 2 15SE1964 19.15498 1 ( 1287 F 3 15SE1964 19.61569 1 ( 1288 B 3 150C1964 11.73320 ) ( 1445 R 6 140C1964 46.57533 1 ( 1289 C 7 140C1964 56.94560 I 1 1290 C 1 160C1964 27.85674 ) ( 1291 C> 2 160C1964 39.72408 ) ( 1292 0 1 150C1964 37.04532 1 ( 1293 D 2 150C1964 47.87283 ) ( 1294 D 3 150C1964 41.07195 ) ( 1295 0 4 15CC1964 40.78963 1 ( 1296 D 5 14QC1964 56.73367 I ( 1297 D 6 140C1964 51.31183 ) ( 1298 E 1 120C1964 32.42136 ) ( 1299 E 2 120C1964 31.C0847 ) ( 1300 F 3 130C1964 23.80525 ) ( 1301 E 4 130C1964 17.92810 ) ( 1302 E 5 130C1964 11.62037 1 ( 1303 E 6 13CC1964 25.85916 ) ( 1304 F 1 11CC1964 9.50805 ) ( 1305 F 2 U0C1564 8.C9095 ) ( 1306 F 3 110C1964 9.89523 ) ( 1307 B 6 N01964 30.30740 1 ( 1308 C 7 6N01964 50.67064 I ( 1309 C 1 10N01964 15.64510 ) ( 1310 C 2 10N01964 2C.C00O0 1 ( 1311 0 1 8N01964 24.74C72 ) I 131? n 2 8N01964 25.42293 1 ( 1313 0 3 9N01964 38.24324 ) ( 1314 0 4 9N01964 32.15341 1 { 1315 D 5 9N01964 48.40764 1 ( 1316 D 6 9N01964 24.06316 > ( 1317 E 1 6NC1964 24.66109 1 ( 131R F 7 7Nni564 26. 50151 1 ( 1119 E 3 7Ntll9<>4 21.76044 I ( 1320 E 4 7N0 1964 17.95242 1 ( 1321 E 5 7N01964 16.75923 ) ( 1322 E 6 7N01964 11.43067 1 ( 1323 F 1 6N01964 9.17073 ) ( 1324 F 2 6N01964 12.55445 ) ( 1325 F 3 6N01964 27.15433 ) ( 1336 C 3 27JA1567 76.56202 ) ( 1337 C 3 2MR1967 8.43634 1 ( 1338 C 3 28MR1967 8.97816 ) ( 1339 C 5 28MR1967 21.82452 ) ( 1340 C 7 28MR1967 4.47938 ) ( 1341 A 3 19AP1967 19.51552 ) ( 1342 A 4 19AP1967 2C. 21185 ) ( 1343 A 6 19AP1967 1.8480C I ( 1344 C 3 25AP1967 14.93920 ) ( 1345 C 5 25AP1967 12.55287 ) ( 1346 C 7 21AP1967 8.1316C 1 ( 1347 6 2 23AP1967 8.99114 ) ( 1348 E 5 23AP1967 14.77724 1 ( 1368 A 3 4MY1967 17.81337 ) ( 1269 A 4 4MY1967 9.91464 1 ( 1370 A 6 3HY1967 14.82334 ) i 1371 C 3 4MY1967 14.8668C ) ( 1372 C 5 5PY1967 12.41311 ) ( 1373 C 7 5HY1967 9.16476 ) ( 1374 E 2 7MY1967 10.04184 1 ( 1375 E 3 7MY1967 14.99074 1 ( 1376 E 5 6MY1967 34.63008 ) ( 1408 A 3 23MY1967 35.95695 ) I 1409 A 4 23MY1967 25.20383 ) { 1410 A 6 24KY1967 29.99548 1 ( 1411 C 3 31HY1567 19.24260 ) ( 1412 C 5 31MY1567 10.31231 ) ( 1413 C 7 25MY1967 7.29696 ) ( 1414 E 2 28MY1967 14.10579 1 ( 1415 E 3 28fY1967 11.01767 1 ( 1416 E 5 28CY1967 21.12444 ) 1 1431 A 3 12JN1967 34.42593 1 ( 1432 A 4 13JN1967 10.01328 ) ( 1433 C 3 17JM967 23.56330 ) ( 1434 C 5 17JN1967 7.74614 ) ( 1435 C 7 13JM967 11.49244 ) 1 1436 E 2 15JN1967 7.C522C ) ( 1437 E 3 15JN1967 4.33343 ) ( 1438 E 5 14JN1567 7.87945 I ( 1446 A 3 11JL1567 27.22469 ) [ 1447 A 4 11JL1967 10.64278 ) ( 1448 A 6 10JL1967 62.63483 ) ( 1449 C 3 16JL1967 6.15232 ) ( 1450 C 5 16JL1967 8.93078 ) ( 1451 C 7 16JL1567 26.59343 1 ( 1452 E 2 14JL1567 16.24303 ) 1 1453 E 3 15JL1567 1.50393 1 ( 1454 E 5 15JL1967 36.82736 ) ( 1504 A 3 28AU1967 46.48808 ) ( 1505 A 4 28AU1567 31.28203 ) ( 1506 A 6 29AU1967 61.51591 I 1 1508 C 3 2SE1967 42.24281 ) 1 1509 C 5 2SE1967 10.24528 1 ( 1510 C 7 29AU1967 48.46664 1 ( 1511 E 2 1SE1967 12.67766 ) ( 1512 i 3 1SE1567 4.35768 1 ( 1513 E 5 31AU1967 13.47927 1 ( 1532 A 3 18SE1967 36.1C262 ) ( 1533 A 4 19SE1967 32.49466 ) ( 1534 A 6 19SE1967 31.92380 I ( 1535 C 7 20SE1967 63.95072 1 (.1536 E 2 24SE1567 25.57669 ) 1 1537 E 3 24SE1567 11.77435 ) ( 1538 E 5 23SE1967 37.85426 ) 1 1539 C 3 40C1967 28.52972 ) ( 1540 C 5 40C1967 39.95631 ) ( 1541 E 2 110C1967 28.68393 ) I 1543 E 5 10CC1567 48.77171 ) ( 1377 GS 1 5MY1967 12.46784 1 1 1378 GS 2 9PY1967 25.14090 1 ( 1379 GS 3 9MY1967 37.91161 ) ( 1380 GS 4 5MY1967 39.31393 ) ( 1381 GS 5 10MY1967 36.39746 1 1 1382 GS 6 10NY1567 20.98309 ) ( 1383 GS 7 l6"HY1967 26.57185 I ( 1384 GS 8 10MY1967 16.24567 ) 1 1385 GS 9 10MY1967 34.94148 I ( 1386 GS1C 12MY1967 22.52226 ) ( 1387 GS11 12MY1967 26.C6146 I ( 1388 GS12 12KY1967 24.91704 1 ( 1389 GS13 12MY1967 12.81489 ) ( 1350 GS14 12HY1967 2C. 14091 ) ( 1391 GS15 12MY1967 26.48087 1 ( 1392 GS16 12PY1967 15.10155 ) ( 1393 GS17 13MY1967 21.47710 ) ( 1394 GS18 13PY1967 13.72691 ) I 1395 GS19 13HY1967 2.87714 ) { 1396 GS20 13FY1967 C.C6289 ) ( 1397 GS?1 13MY1967 C. 64097 ) ( 1398 GS22 14MY1967 37.82979 ) ( 1554 GS 1 3GC1967 15.52456 ) ( 1555 GS 2 30C1567 24.71751 ) ( 1556 GS 3 3CC1967 4C. 15225 ) ( 1557 GS 4 30C1967 14.91031 ) ( 1558 GS 5 4CC1967 11.93119 ) ( 1559 GS 7 40C1967 14.93320 1 ( 1560 GS 8 40C1967 16.18353 ) ( 1561 GS 5 40G1567 29.17180 ) ( 1562 GS10 5GC1967 23.31375 1 ( 1563 GS11 50C1967 2C. 62386 ) 1 1564 GS12 5CC1567 8.87155 ) ( 1565 GS13 50C1967 3.90427 ) ( 1566 GS 14 50C1967 16.56577 ) 1 1567 GS15 50C1967 22.67242 ) ( 1568 GS16 50C1967 2.82824 ) ( 1569 GS 17 50C1967 6.03511 ) ( 1570 GS18 5CC1967 8.23003 1 l 1571 GS19 60C1967 1.59811 ) l 1572 GS20 60C1567 C.C5047 1 ( 1573 GS21 6GC1967 0.26206 ) ( 1574 GS22 60C1967 24.96692 ) ( 1575 GS28 60C1967 1.08376 ) r 1544 Ml 1 7CC19A7 0.15012 1 ( 1547 MS 1 20C1967 5.23752 1 ( 1524 p I 1 20SE1967 36.87915 ) ( 1546 LU 1 2CC1967 1.6CC56 ) I 1520 HO 1 18SE1967 15.61601 ) l 1521 SH 1 18SE1967 5.9C815 ) 1 15?? RH 1 18S61967 0.00912 1 ( 1523 RA 1 19SE1967 17.12177 ) ( 1525 FN 1 20SE1967 47.68138 ) ( 1526 HO 1 20SE1967 5.27963 ) I 1527 TR 1 20SE1967 1.91195 1 ( 1528 SB 1 20SE1967 3C. 03175 1 f 1579 KW 1 70SE1967 6.52356 ) ( 1530 FR 1 24SE1967 11.52115 1 ( 1531 GH 1 25SE1967 1.75824 1 ( 1545 WL 1 20G1967 2.91912 ) ( 1548 CA 1 30C1967 7.32731 1 ( 1549 PC 1 40C1967 21.7C755 ) | 1551 F5 1 5DC1967 3.45075 ) ( 1552 SP 1 6CC1967 0.66689 ) ( 1550 FR 1 5CC1967 2.77537 1 ( 1553 SG 1 60C1967 0.41863 ) ( 1428 MU 2 25MY1967 1.01238 ) l 1426 PS 2 29MY1567 10.75066 ) ( 1351 MI ? 21AP1967 1.390?? 1 ( 1427 LU 2 29PY1967 17.62711 ) l 1417 HO 2 22MY1967 3.40960 ) ( 1418 SH 2 22MY1567 35.83203 I I 1350 BH 2 19AP1967 0.35242 I ( 1425 SA 2 25KY1967 17.11607 ) | noq pw 7 5MY1967 8.70511 1 ( 1401 MO 2 6MY1967 5.26811 ) 1 1402 IR 2 6PY1967 4.85163 ) ( 1400 SB 2 6MY1967 6.67143 ) I 1352 KW 2 21AP1967 6.32194 ) ( 1353 FR 2 23AP1567 46.24472 1 1 1354 GH ? 25AP1967 0.66281 1 ( 1429 WL 2 29PY1967 5.26595 1 ( 1403 CA 2 10MY 1967 22.17662 ) ( 1404 PO 2 10PY1967 21.13820 1 ( 1405 ES 2 12MY1967 7.32714 1 ( 1407 SP 2 14PY1967 6.68776 ) i 1349 ri 7 19AP1967 2.64387 ) ( 1419 BU 2 23PY1967 33.98022 ) ( 1420 IH 2 23MY1967 39.39577 ) ( 1421 CH 2 23PY1967 36.64122 ) ( 1422 GA 2 23PY1967 35.72267 ) ( 1423 UA 2 25PY1967 16.77274 ) 1 14?4 KN 2 25MY1967 17.05301 ) ( 1430 MC 2 12JN1967 72.63754 ) ( 202 TabefLaria fenestvata var. genioutata A. Cleve TdbeVtavia fenestvata var. genioutata A. Cleve, Ofv. K. Svenska Vet.-Akad, Forhandl., 8:831, fig. 1-5. 1899. Distinguished from the nominate variety by valves which are rather strongly bent in the apical axis. In most specimens the midportion of the valve is more strongly expanded on the side opposite the arc of the ends. This entity is highly variable in both frustule structure and colony forma- tion. The valves are often somewhat constricted near the central and terminal expansions. Perhaps best treated as a separate species of subspecies (Skabitschewsky 1960). _L12 TAFENEVG TCT MC CF STATICNS 2Z8 , (6C973 CH 1876 0.02362 ) 3540 CH 11MY1879 C. 40069 1 3541 CH 1FE1881 C. 44016 ) I 3507 (46917 CH CH 19FE1881 12JA1946 0.29432 I 0.01636 ) 46510 46915 CH CH 0C1945 20FE1946 0.002 18 ) 0.05121 ) 46921 46914 CH CH 23N01945 19AP1946 C. 00259 ) C. 00214 1 (46924 (46905 CH CH 10MY1946 JA1947 0.00141 ) 0.00123 ) 46923 46909 CH CH 22N01946 MR1947 0.00219 ) 0.01821 I 46920 46912 CH CH 200E1946 AP1947 C. 00062 ) C. 01150 ) (46916 (46922 CH CH 4MY1947 21AU1947 0.00068 ) 0.01551 1 46919 46758 CH EV 5JN1947 5JN1937 0.00303 1 0.00357 1 46907 46771 CH EV JL1947 11JN1937 0.04586 1 C.0C238 1 (46743 (46764 EV EV 20JN1937 17JL1937 0.01713 ) 0.0C806 I 46745 46757 EV EV 3JL1937 25JL1937 0.04130 1 0.05296 ) 46770 46747 EV EV 9JL1937 1AU1937 C. 03578 ) C.0C743 ) (46765 ( 1223 EV B 3 30AU1937 18MV1964 0.02231 ) 0.CC156 ) 46767 1224 EV B 4 27QC1937 18HY1964 0.00387 ) 0.00196 ) 46761 1225 EV C 6 27HY1938 15MY1964 C.0C545 ) C.CC392 ) ( 1226 ( 1229 C 0 7 5 16MY1964 14MY1964 0.01142 ) 0.03806 ) 1227 1230 C E 2 2 13MY1964 16MY1964 0.00548 ) 0.00839 1 1228 1231 0 E 2 3 14MY1964 16MY1564 C.CC973 ) C.C2201 ) ( 1232 L 1235 E C 5 7 16MY1964 16JN1964 0.C6261 ) 0.01130 ) 1233 1439 B B 3 6 5JN2964 5JN1964 0.01667 1 0.00799 1 1234 1236 B C« 3 1 18JN1964 8JN1964 C.C2530 ) 0.00525 ) ( 1237 ( 1241 c E 2 2 8JN1964 13JN1964 0.00258 ) 0.00444 ) 1239 1242 0 E 4 3 11JN1964 13JN1964 0.02321 ) C.0O15O ) 1240 1243 0 E 6 6 10JM564 13JN1964 C.CC153 ) 0.01879 ) ( 1244 ( 1247 F B 1 3 11JN1964 14JL1964 0.02193 ) 0.02134 ) 1245 1248 F B 2 3 11JN1964 24JL1964 C. 01037 1 0. 01379 ) 1246 1440 F B 3 6 11JM964 11JL1964 C.C2988 1 C.C1843 ) ( 1441 ( 1251 B C 6 7 24JL1964 16JL1964 0.01762 ) 0.00579 ) 1249 1252 C C 3 1 8JL1964 16JL1S64 O.C0815 1 0.08647 ) 1250 1253 C C" 6 2 10JL1964 16JL1964 0.01644 ) C. 03880 ) ( 1254 ( 1257 D E 2 3 15JL1964 14JL1564 0.01341 1 0.00718 ) 1255 1258 0 F 5 1 15JU964 6JL1964 0.01797 ) 0.02360 I 1256 1259 E F 2 2 14JL1S64 6JL1964 C.CC550 ) C. 02789 ) ( 1260 ( 1442 F B 3 6 6JL1964 2AU1964 0.05348 ) 0.02388 ) 1261 1443 B B 3 6 2AU1964 16AU1964 0.00589 ) 0.00593 1 1262 1264 B C 3 1 17AU1S64 10AU1964 C.C8190 ) C. 13516 ) ( 1265 ( 1268 C E 2 2 10AU1964 15AU1964 0.10730 ) 0.04650 1 1266 1269 D E 3 3 18AU1964 15AU1964 C. 04911 ) 0.02193 ) 1267 1270 0 F 6 1 18AU1964 10AU1964 0.08214 ) C. 07352 ) ( 1444 ( 1273 B C« 6 ? 19SE1964 10SE1964 0.00909 I 0.09678 ) 1271 1274 C 0 7 1 22SE1964 17SE1964 0. 01306 ) 0.36128 I 1272 1275 C" 0 1 2 10SE1964 17SE1564 C. 25859 ) C. 24515 ) ( 1276 ( 1279 D E 3 1 18SE1964 16SE1964 0.06705 ) 0.54973 1 1277 1280 0 E 4 2 18SE1964 16SE1964 0.05577 ) C. 10212 ) 1278 1281 0 E 6 3 18SE1964 16SE1564 0.22676 ) C. 05494 1 ( 1282 C1285 E F 4 1 16SE1964 15SE1964 0.06648 1 0.48337 1 1283 1286 E F 5 2 16SE1964 15SE1964 0.06743 ) 0.52539 1 1284 1287 E F 6 3 17SE1964 15SE1964 0.06355 ) C. 45536 ) ( 1288 ( 1290 8 C« 3 1 150C1964 160C1564 0.01306 ) 0.06822 ) 1445 1291 B C 6 2 140C1964 160C1964 0.03588 ) 0.01712 ) 1289 1292 C D 7 1 140C1964 150C1964 C. 03078 ) C.C2609 ) ( 1293 1 _L296.. 0 D E E 2 5 2 5 150C1964 140C1964 120C1964 130C1964 0.03302 1 0.C1967 ) 0.04084 ) 0.02429 ) 1294 1297 D C 3 6 150C1964 14CC1964 0.01319 ) 0.01333 ) 1295 1298 0 E 4 1 150C1964 120C1964 C. 02378 ) 0.02154 I ( 1299 ( 1302 1300 1303 E E 3 6 130C1964 130C1964 0.02148 ) C. 00560 ) 1301 1304 E F 4 1 130C1964 U0C1964 C.C5741 ) 0.03704 1 ( 1305 ( 1308 F C 2 7 110C1964 6N01964 0.03105 ) C. 04562 ) 1306 1309 F C* 3 1 110C1964 10N01964 C. 03603 ) 0.14150 1 1307 1310 B C 6 2 N01964 10NC1964 C. 21287 1 C. 11338 ) ( 1311 [ 1314 D 1 4 8N01964 9N01964 0.05160 ) 0.04306 ) 1312 1315 D 0 2 5 8N01964 9NC1964 C. 09002 ) 0.03185 ) 1313 1316 0 c 3 6 9NC1964 9N01964 0.02896 ) C.C1133 ) ( 1317 . .L-LJ21L. E E F C 1 4 6N01964 7N01964 0.08042 ) 0.03102 ) 1318 1321 E E 2 5 7NLU964 7N01964 0.05327 1 0.02554 ) 1319 1322 E E 3 6 7N01964 7N01964 0.01047 ) C. 01333 ) ( 1323 ( 1337 1 3 6N01964 2MR1967 0.05854 ) 0.00147 ) 1324 1338 F C 2 3 6N01964 28MR1967 0.04891 ) 0.00264 1 1325 1340 F C 3 7 6N01S64 28MR1967 C.C3778 1 C.CC218 ) ( 1342 JL _U46 A C 4 7 19AP1967 21AP1967 0.00180 ) 0.00534 ) 1343 1347 A E 6 2 19AP1967 23AP1967 C. 00069 ) 0.00163 ) 1345 1348 C E 5 5 25AP1967 23AP1967 C.CC195 ) C.CC548 ) ( 1368 i.lita A . _ E. 3 5 4MY1967 6MY1967 0.00628 I 0.01687 ) 1371 1409 C A 3 4 4MY1967 23HY1967 0.00462 ) 0.00298 ) 1375 1410 E A 3 6 7MY1967 24MY1567 0.00241 ) C.C1128 ) ( 1411 1 1416 C E 3 5 31MY1967 28MY1967 0.00410 I 0.00219 ) 1414 1438 E E 2 5 28MY1967 14JN1967 0.00336 ) C.C0363 ) 1415 1446 E A 3 3 28MY1967 11JL1967 C.0C225 ) C. 00734 ) ( 1448 A C 6 7 10JL1967 16JL1967 0.00354 ) 0.00394 ) 1449 1452 C E 3 2 16JL1967 14JL1967 0.14903 I 0.00213 t 1450 1453 C E C E 5 3 5 3 16JL1967 15JL1967 2SE1967 1SE1967 C.CC190 ) C. 00253 1 ( 1454 ( 1510 E r. 5 7 15JL1967 29AU1967 0.03601 ) 0.00632 ) 1504 1511 A E 3 2 28AU1967 1SE1967 0.00741 I 0.04298 I 1509 1512 C. 01514 ) C.C6675 ) ( 1513 ( 1536 E F 5 ? 31AU1967 24SF1967 0.29898 ) 0.7263? 1 1534 1537 A E 6 3 19SE1967 74SF1967 0.00931 1 0.31916 1 1535 1538 C E 7 5 20SE1967 23SE1967 C.0C322 ) C.C3867 ) ( 1540 ( 1543 C E 5 5 40C1967 100C1967 0.00496 ) 0.00718 I 1541 1377 E GS 2 1 110C1967 9MY1967 C. 22883 ) 0.00396 ) 1542 1378 E GS 3 2 U0C1967 9MY1967 C. 18308 ) C. 01262 ) ( 1379 _. ( .. 13S2_ GS GS 3 6 9MY1967 10M"1967 0.04023 ) 0.06661 ) 1380 1383 GS GS 4 7 0 3 9MY1967 10HY1967 0.06558 I 0.07218 I 1381 1384 GS C-S 5 8 10MY1967 10MY1967 C.C7632 ) C. 01294 ) ( 1385 ( 1388 GS 9 GS12 10MY1S67 12MY1S67 C. 03296 ) 0.03017 ) 1386 1389 GS GS 12MY1967 12MY1967 0.02585 1 0.01289 I 1387 1390 GS11 GS14 12HY1967 12HY1567 C.C4357 ) C. 00587 I ( 1391 ..( .1554 GS15 GS L . GS 4 GS_.8... GS11 GS16 12MY1567 3QC1967 3GC1967 4001967 5CC196 7 5GC1967 0.00958 ) 0.26329 ) 0.02990 ) 0.11335 ) 0.01637 I 0.00144 I 1393 1555 GS17 GS 2 13MY1967 30C1967 C. 00274 1 C. 61794 ) 1398 1556 CS22 GS 3 14HY1967 30C1567 C.C1214 ) C. 01043 ) 1 1557 (.. 1560 1558 1561 1564 1569 GS GS 5 9 40C1967 40C1967 50C1967 50C1967 C. 03567 ) C. 10565 1 0.00165 ) 0.00297 1 1559 1562 1567 1570 GS 7 GS10 GS15 GS18 4GC1967 50C1967 50C1967 50C1967 C. 16087 1 0.01727 I 1 1563 I 1568 GS12 GS17 C. 02382 1 C. 01983 ) ( 1571 ( 1546 GS19 LU 1 FR 1 LU 2 ES 2 6CC1967 2GC1967 24SE1967 29WY1967 12MY1S67~ 0.00059 ) 0.01000 ) C. 24002 ) 0.01211 ) 0.0064 5 > 1574 1526 GS22 M0 1 60C1967 20SE1967 0.03164 ) 0. 00569 ) 1547 1528 1549 1404 1422 fS SB fC CO GA 1 1 1 2 2 20C1967 20SE1967 4CC1967 10KY1967 23MY1967 C. 03992 ) C.C1444 1 ( 1530 ( 1427 .. ( 1405 1545 1352 1421 hi KW CH 1 2 2 20C1967 21AP1967 23KY1967 C. 00676 I 0.00859 1 C. 01735 I C. 04111 ) C. 12703 ) C.0C511 ) 203 Tabellaria fenestrata var. intermedia Grun. Tabellaria fenestrata var. intermedia Grunow in: Van Heurck, Syn. Diat. Belgique, pi. 52, fig. 6-8. 1881. Distinguished from the nominate variety by its shorter valves which are usually much wider in girdle view and which usually contain more than 4 septae. Maximum length of observed specimens less than lOOp. Perhaps best treated as a separate species. 713 TAFENEVI TCT NO CF STATIONS ( 3540 CH 11MY1879 0.07455 ) ( 3541 CH 1FE1881 0.03913 1 46912 CH AP1947 C.C1150 ) (46919 CH 5JN1947 0.00303 ) ( 1449 C 3 16JL1967 0.03439 ) 1454 E 5 ( 1511 E 2 1SE1967 0.0C614 1 ( 1513 E 5 31AU1967 C. 02027 ) 1537 E 3 24SE1967 C.0C863 1 (1541 E 2 110C1967 C.0C532 ) ( 1542 E 3 11CC1967 C. 01017 ) 1380 C-S 4 9KY196? C.CC336 ) ( 1381 GS 5 10. Y1967 0.C0239 1 ( 1382 GS 6 10HY1967 0.00278 ) 1386 GS10 12MY1967 C.0C575 ) ( 1386. __. G.Si_2 _ ..J.2MY.L567 0.01207 ) ( 1389 GS13 12KY1967 C. 00516 ) 1393 GS17 13. Y1967 C.CC274 ) ( 1554 GS 1 30C1967 0.00356 ) ( 1555 GS 2 30C1967 0.01412 ) 1556 GS 3 30C1967 C.0C521 ) ( 1557 GS 4 3GC196 7 0.00374 ) ( 1558 GS 5 40C1967 C. 00793 ) 1559 GS 7 ( 1560 gs a 40C196 7 0.00945 1 1 1574 GS22 60C1967 0.00288 1 1547 . S 1 20C1967 C.0C798 1 ( 1548 ... CA J,.. 30C1967 C. 01272 ) ( 1349 CI 2 19AP1967 0.00359 I Tabellaria floooulosa (Roth) Kutz. Conferva floooulosa Roth, Catalecta Bot., Fasc. 1, p. 192, pi. 4, fig. 4; pi. 5, fig. 6. 1797. Tabellaria floooulosa (Roth) Kutzing, Bacill. , p. 127, pi. 17, fig. 21. 1844. Cells in girdle view short, rectangular with rounded ends, united by gelatinous pads at the corners into zig-zag colonies. Usually more than 8 conspicuous septae, lying in the valvar plane, are evident in each cell. Valves linear, strongly expanded at the middle and less expanded at the ends. Valves often slightly asymmetric to the transverse axis, being wider at one side of the central expansion than at the other. Valves of specimens from Lake Michigan 15-65u long, 7-12y broad at the widest extremity. Striae fine, perpendicular to the midline throughout, 18-20 in lOu. Axial area narrow, linear, in some instances lanceolately widened at the middle of the valve. At the ends of the valves there are pore fields composed of very fine, irre- gularly arranged puncta. A conspicuous slime pore is present, usually lying to one side of the axial area at about the level of the beginning of the central expansion. In asymmetric valves the slime pore is usually toward the broader end of the valve. In some populations fine marginal spines are present at the ends of the valves. ( 1226 ( 1229 ( 1232 ( 1235 ( 1237 C 7 D 5 E 5 . C. 7 C" 2 714 TAFLCCCU TCT NC OF STATIONS 318 160973 ... ...CH CH . CH CH CH 1876 19FE1881 _C.E1945 19AP1946 20DE1946 1.62966 ) 7.99185 ) 5.23666 I 3.50443 ) 2.12282 I ( 3540 (46910 (46917 ( 46924 (46905 CH CH CF CH CH 11MY1879 OC1945 12JA1946 10MY1946 JA1947 17.06192 I ( 3541 CH 1FE1881 23N01945 20FE1946 22N01946 MR1947 14.47716 1 ( 3507 (46908. (46914 (46920 C. 78101 1 3.15362 1 2.24688 ) 8.16644 ) (46921 (46915 (46923 (469C9 CH Ch CH CH 1.87C28 1 4.62642 ) 4.83018 ) 8.87938 1 (46912 (46919. CH ...CH. . _ AP1947 5.J.N1.94 7 21AU19 47 20JN1937 17JL1937 23AU1937 2.98954 1 0.78906 ) 3.43370 ) 5.27533 I 11.0556C ) 4.54545 ) (46916 (469C7 (46758 (46745 (46757 (46765 CH CH EV EV EV EV 4MY1947 JL1947 1.10269 I 4.87196 ) (469C6 (46913 CH CH . Y1S47 6AU1947 C. 56082 ) C.C5230 ) (46922 (46743 CH _ EV EV FV 5JN1937 3JL1937 25JL1937 30AU1937 3.19521 1 12.87356 ) 7.00977 ) 12.18070 1 (46771 (46770 (46747 (46769 EV EV 11JM937 9JL1937 2.26332 1 18.53529 1 (46764 (46 763 EV EV 1AU1937 7SE1937 2.77248 ) 1C. 94225 ) (46752 (46744 EV . E.V EV ...EV _.. EV B 3 15SE1937 6CC1937 12MR1938 30CR1938 19MY1938 18MY1964 4.48411 ) 2.73117 ) 4 .4 180 1 ) 2.07682 1 1.98514 ) 13.01664 1 (46760 (46748 (46768 (46772 (46761 ( 1224 EV EV EV EV 22SE1937 130C1937 4.27397 ) 0.44833 ) (46750 (46767 (46762 (46756 EV EV EV EV 24SE1937 270C1937 18HP1938 27AP1938 9.23787 ) 2.92445 ) (46749 (46751 16HR1938 18AP1938 1.96972 ) 3.37828 I 2.24967 ) C. 89326 ) (46759 ( 1223 EV e 4 27. Y1S38 18MY1964 3.96817 ) 4.39173 ) (46766 ( 1225 EV C 6 14DE1938 15. Y1964 6.65399 ) 3.56723 1 16MY1964 14MY1964 16MY1964 16JN1964 8JN19 64 6.12633 ) 6.66089 ) 6.4524C 1 23.72412 ) 11.36891 1 ( 1227 C 2 ( 12_3C E 2 ( 1233 B 3 J 1.439 B 6 ( 1238 0 3 13. Y1964 16HY1964 7.82981 ) 7.05290 ) ( 1228 ( 1231 0 2 E 3 5JN2964 _ 5 JNJ164 1 UN 1964 21.17119 1 13.84615 ) 2.66000 ) ( 1234 ( 1236 14MY1964 16KY1964 18JN1964 8JN1964 4.08727 ) __5.-8.2J 3 5 ) 15.94129 I 23.89203 1 11JM964 13.32173 1 204 ( 12*0 D 6 10JN1964 12. 34833 1 ( 1241 E 2 13JM964 11.07431 ) ( 1242 E 3 13JN1964 1.78341 ) ( 1243 E 6 13JN1964 13.30076 ) 1 1244 F 1 UJN1964 17.49942 ) ( 1245 F 2 11JN1964 22.26678 ! ( 1246 F 3 11JN1964 19.24341 ) ( 1247 B 3 144L1964 13.44602 ) ( 1248 B 3 24JL1964 12.0C047 ) ( 1440 B 6 11JL1964 14.44522 ) ( 1441 B 6 24JL1964 9.55968 1 ( 1249 C 3 8JL1964 14.25855 ) 1 1250 C 6 10JL1964 14.10072 » ( 1251 C 7 16JL1964 36.29990 ) ( 1252 C" 1 16JL1964 23.43095 ) ( 1253 C 2 16JL1964 14.05879 1 < 1254 D 2 15JL1964 4.82666 I ( 1255 0 5 15JL1964 2.87460 ) 1 1256 E 2 14JL1964 4.2317C ) ( 1257 E 3 14JL1964 2.17729 ) ( 1258 F 1 6JL1964 12.22361 I ( 1259 F 2 6JL1964 13.23128 ) I 1260 F 3 6JL1964 12.83496 ) ( 1261 B 3 2AU1964 11.67674 ) 1 1762 B 3 17AU1964 5.73288 ) ( 1442 8 6 2AU1964 19.10609 1 ( 1443 B 6 16AU1964 5.25837 ) ( 1263 C 7 15AU1964 8.68695 ) ( 1264 C» 1 10AU1964 2C. 94917 1 ( 1265 C 2 10AU1964 10.7974C ) ( 1266 D 3 18AU1964 3.19209 1 ( 1267 0 6 18AU1964 16.49373 1 ( 1268 E 2 15AU1964 4.59569 ) ( 1269 E 3 15AU1964 0.64134 1 < 1270 F I 10AU1964 11.24574 I ( 1444 8 6 19SE1964 2.54630 ) { 1271 C 7 22SE1964 20.56538 I ( 1272 C 1 10SE1964 11.49284 I ( 1273 C 2 10SE1964 8.28001 ) < 1274 D 1 17SE1964 10.51002 ) ( 1275 D 2 17SE1964 9.48326 1 ( 1276 D 3 18SE1964 5.38757 ) ( 1277 Q 4 18SE1964 15.61532 ) ( 1278 D 6 18SE1964 25.28920 ) 1 1279 E 1 16SE1964 14.84274 1 ( 1280 E 2 16SE1964 8.57785 ) ( 1281 E 3 16SE1964 3.57101 1 < 1282 E 4 16SE1964 10.C8310 ) ( 1283 E 5 16SE1964 7.72343 ) ( 1284 E 6 17SE1964 9.11893 1 ( 1285 F 1 15SE1964 7.74562 ) ( 1286 F 2 15SE1964 8.42820 ) ( 1287 F 3 15SE1964 8.75700 ) ( 1288 B 3 150C1964 7.46659 ) ( 1445 B 6 140C.1964 18.94977 ) ( 1289 C 7 140C1964 20.00790 ) { 1290 C" 1 160C1964 6.63256 ) ( 1291 C" 2 160C1964 11.98571 ) ( 1292 D 1 150C1964 13.56589 ) ( 1293 0 2 150C1964 15.84756 ) ( 1294 D 3 150C1964 15.22893 ) ( 1295 D 4 150C1964 18.72992 ) ( 1296 D 5 140C1964 19.0C302 ) I 1297 0 6 140C1964 21.59094 ) { 1298 E 1 12CC1964 17.34166 ) ( 1299 E 2 120C1964 12.75526 ) ( 1300 E 3 13DC1964 9.27152 ) 1 13C1 E 4 130C1964 6.80032 1 ( 1302 E 5 130X1964 6.51875 ) ( 1303 E 6 130C1964 21.94112 ) ( 1304 F 1 U0C1964 4.49471 ) ( 1305 F 2 11DC1964 4.46814 ! ( 1306 F 3 110C1564 2.71634 ) ( 13C7 B 6 N01964 18.43700 ) ( 1308 C 7 6N01964 22.14178 I ( 1309 C 1 10N01964 6.07795 ) ( 1310 C* 2 10N01964 6.98413 ) 1 1311 0 1 8N01964 6.68180 ) ( 1312 0 2 8N01964 8.47431 ) ( 1313 D 3 9N01964 1C. 54054 ) ( 1314 0 4 9N01964 14.C6712 1 ( 1315 D 5 9N01964 13.05732 ) ( 1316 D 6 9NC1964 2C.C9669 ) ( 1317 E 1 6N01964 8.C4166 ) ( 1318 E 2 7N01964 9.45532 ) ( 1319 E 3 7N01964 5.86495 ) ( 1320 E 4 7N01964 7.52844 ) ( 1321 E 5 7N01964 6.48024 ) ( 1322 E 6 7N01964 6.53181 ) ( 1323 F 1 6KC1964 7.9C244 ) ( 1324 F 2 6N01964 8.96746 ) ( 1325 F 3 6N01964 17.28003 ) I 1336 C 3 27JA1967 7.27861 ) < 1337 C 3 2MR1967 4.42393 ) ( 1338 C 3 28MR1967 4.16512 ) { 1339 C 5 28HR1967 8.29332 ) ( 1340 C 7 28MR1967 1.98518 ) ( 1341 A 3 19AP1967 6.15081 ) ( 1342 A 4 19AP1967 5.81091 ) ( 1343 A 6 19AP1967 1.26442 ) ( 1344 C 3 25AP1967 3.24262 ) 1 1345 C 5 25AP1967 2.18311 1 ( 1346 C 7 21AP1967 1.68240 ) { 1348 E 5 23AP1967 4.22207 ) ( 1368 A 3 4MY1S67 6.37763 1 1 1369 A 4 4MY1967 1.30456 ) ( 1370 A 6 3MY1967 5.96156 ) ( 1371 C 3 4MY1967 3.39351 ) ( 1372 C 5 5MY1967 3.22741 ) ( 1373 C 7 5MY1967 C. 49917 ) ( 1374 E 2 7MY1967 4.81172 ) ( 1375 E 3 7MY1967 5.05306 I ( 1376 E 5 6MY1967 10.23162 ) ( 1408 A 3 23MY1967 13.77275 ) 1 1409 A 4 23MY1967 5.4157C ) i 1410 A 6 24MY1967 5.92016 ) ( 1411 C 3 31MY1967 7.75448 ) { 1412 C 5 31MY1967 2.94638 1 ( 1413 C 7 25MY1967 5.C8576 ) ( 1414 E 2 28MY1967 4.93703 ) 1 1415 E 3 28MY1967 3.93488 ) ( 1416 E 5 28MY1967 4.13304 ) ( 1431 A 3 12JN1967 11.53539 ) ( 1432 A 4 13JN1967 3.39736 1 ( 1433 C 3 17JN1967 17.63338 ) ( 1434 C 5 17JN1967 3.97775 ) ( 1435 C 7 13JN1967 5.74622 ) ( 1436 E 2 15JN1967 3.03951 ) ( 1446 A 3 11JL1967 13.52674 ) ( 1447 A 4 11JL1967 3.60217 ) ( 1448 A 6 10JL1967 11.88329 1 1 1449 C 3 16JL1967 1.33746 ) 1 1450 C 5 16JL1967 2.39931 ) ( 1451 C 7 16JL1967 9.09413 ) ( 1452 E 2 14JL1967 5.81173 ) ( 1453 E 3 15JL1967 0.25782 ) I 1454 E 5 15JL1967 11.76235 ) I 1504 A 3 28AU1967 10.54191 ) I 1505 A 4 28AU1967 4.32856 ) 1 1506 A 6 29AU1967 9.52032 ) ( 1508 C 3 2SE1967 1C. 35089 ) ( 1509 C 5 2SE1S67 3.05844 ) ( 1510 C 7 29AU1967 8.18843 1 ( 1511 E 2 1SE1967 4.08263 1 1 1512 E 3 1SE1967 0.46725 < ( 1513 E 5 31AU1967 7.C9435 ) ( 1532 A 3 18SE1967 6.20873 ) ( 1533 A 4 19SE1967 7.14882 ) ( 1534 A 6 19SE1967 8.90392 ) ( 1535 C 7 20SE1967 12.84321 ) ( 1536 E 2 24SE1967 6.48961 ) ( 1537 E 3 24SE1967 C. 60381 1 ( 1538 E 5 23SE1967 6.96017 ) ( 1539 C 3 4CC1967 6.69216 ) ( 1540 C 5 40C1967 9.72849 I ( 1541 E 2 110C1967 6.7C534 ) 1 1542 E 3 110C1967 0.37632 ) ( 1543 E 5 100C1967 5.55322 ) ( 1377 GS 1 9MY1967 6.09539 ) ( 1378 GS 2 9MY1967 12.95152 ) 1 1379 GS 3 9HY1967 19.93066 ) ( 1380 GS 4 9MY1967 15.77266 ) I 13R1 GS 5 10MY1967 15.52736 ) ( 1382 GS 6 10KY1967 6.99436 I ( 1383 GS 7 10MY1967 11.22754 ) < 1384 GS 8 10MY1967 6.98771 ) ( 1385 GS 9 10MY1967 10.71319 ) < 1386 GS10 12MY1967 5.22838 ) ( 1387 GS11 12MY1967 4.99049 1 ( 1388 GS12 12MY1967 6.75716 ) ( 1389 GS13 12MY1967 3.60983 1 ( 1390 GS14 12MY1967 4.52143 ) ( 1391 GS15 12HY1967 6.03362 ) [ 1392 GS16 12MY1967 3.23605 ) ( 1393 GS17 13MY1967 4.21872 ) ( 1394 GS18 13MY1967 1.68576 ) 1 1395 GS19 13MY1967 C. 45212 1 ( 1396 GS20 13MY1967 0.00666 ) ( 1397 GS21 13NY1967 0.02224 ) I 1398 C-S22 14MY1S67 7.65097 ) 1 1554 GS 1 3nr.l967 8.71700 1 ( 1555 GS 7 3f]G1967 8.65113 1 1 1556 GS 3 30C1967 14.45481 ) 1 1557 GS 4 30C1967 3.40060 ) ( 1558 GS 5 40C1967 6.65927 ) ( 1559 GS 7 40C1967 6.60978 1 ( 1560 GS 8 40C1967 12.56317 ) ( 1561 GS 9 40C1967 16.48917 1 ( 1562 GS10 5GC1967 8.63473 1 ( 1563 GS11 5CC1967 9.16616 ) < 1564 GS12 50C1967 2.30430 ) ( 1565 GS13 50C1967 0.70987 ) 1 1566 GS14 5CC1967 5.13667 ) ( 1567 GS15 5GC1967 7.11292 ) ( 1568 C-S 16 5CC1967 C. 17171 1 ( 1569 GS17 50C1967 1.24864 ) ( 1570 GS18 5CC1967 1.24950 ) ( 1571 GS19 6QC1967 0.00761 ) 1 1572 GS20 60C1567 0.01172 ) ( 1573 GS21 60C1967 0.C1568 ) ( 1574 GS22 6CC1967 7.65115 1 ( 1575 GS28 60C1567 0.16385 ! ( 1544 MU 1 2CC1967 0.00953 ) ( 1547 MS 1 20C1967 2.29940 I (..1.52.4. Mil 20SE1967 10.85814 ) { 1546 LO 1 20C1967 C. 21508 1 ( 1520 FG 1 1SSE1967 4.67726 ) ( 1521 SH 1 18SE1967 1.75398 ) ( 1522 6H 1 18SE1967 0.00182 ) ( 1523 RA 1 19SE1967 6.49446 I 1 1525 PW 1 20SE1967 14.92828 ) ( 1526 MO 1 20SE1967 3.18598 ) 1 1527 TR 1 20SE1967 C. 58491 ) ( 1528 SB 1 20SE1967 9.70257 ) ( 1529 KW 1 20SE1967 2.87804 ) ( 1530 FR 1 24SE1967 4.16042 ) ( 1531 GH 1 25SE1967 C. 18597 ) ( 1545 Wl 1 2CC1967 C. 32435 ) I 1548 CA 1 30C1967 2.25658 ) ( 1549 MO 1 40C1967 10.52487 1 ( 1551 ES 1 50C1967 0.87068 ) I 1552 SM 1 60C1567 C. 37636 I I 1550 PR 1 5CC1967 0.39648 ) I 1553 SG 1 60C1967 C. 23502 ) 1 1428 HI 2 29MY1967 0.62671 ) ( 1426 MS 2 29MY1967 3.19160 I ( 1351 MI 2 21AP1967 0.79441 ) ( 1427 LU 2 29MY1S67 8.71671 ) ( 1417 HO 2 22MY1967 2.3927C ) ( 1418 SH 2 22MY1967 17.16551 ) ( 1350 EH 2 19AP1967 C.C7929 ) ( 1425 RA 2 25MY1967 9.76041 ) ( 1399 PW 2 5MY1967 4.67900 ) ( 1401 KO 2 6MY1967 2.06961 ) ( 1402 TR 2 6MY1S67 1.99264 ) ( 1400 SB 2 6MY1967 3.52633 ) I 1352 KW 2 21AP1567 2.C6150 ) ( 1353 FR 2 23AP1967 11.64557 ! 1 1354 GH 2 25AP1967 C. 06041 ) ( 1429 Ul 2 29MY1967 2.71791 ) ( 1403 CA 2 1CMY1967 11.92624 1 ( 1404 MC 2 10MY1967 11.58537 ) ( 14C5 ES 2 12MY1967 3.92157 ) ( 1407 SM 2 14MYIS67 3.34388 ) ( 1349 CI 2 19AP1967 1.26446 ) ( 1419 BU 2 23MY1967 12.88905 ) (.1420 IH 2 23MY1967 18.85196 ) 1 1421 CH 2 23MY1967 13.60167 ) I 1422 CA 2 23MY1967 13.89669 I ( 1423 HA 2 25MY1967 8.9C678 ) 1 1424 KN 2 25MY1967 6.39488 ) ( 1430 CC 2 12JM967 16.18553 ) Genus Thalassiosira Cleve Cleve, Bih. K. Svenska Vet.-Akad. Handl. , 1(13):6. 1873. Members of the genus Thalassiosira find their primary habitat in marine and brackish-water plankton communities. The species occurring in Lake Michigan are usually associated with areas receiving considerable chloride contamination. 205 Thalassiosira fluviatilis Hust. Thalassiosira fluviatilis Hustedt, Ber. Deutsch. Bot. Ges., 43:565, figs. 1-4. 1926. Cells short cylindrlc with either concave or convex valve faces. Speci- mens from Lake Michigan 12-27u in diameter. Ornamentation of the valve sur- face composed of fine areolae which are arranged in single, more or less sinuous, rows of varying lengths. A corona of short submarginal spines, about 14 in lOu, is present and in addition a single (very rarely 2 or 3) much larger spine arises just interior to the level of the smaller spines. Usually 2-5 more or less conspicuous slime pores occur around the center of the valve about one-fourth the distance from the center to the edge of the valve . Previous records indicate that this species is a halophilous freshwater form of wide distribution. It is occasionally in samples from regions of Lake Michigan subjected to chloride contamination. In rare instances it occurs in considerable abundance. 715 THFLUVIA TCT NO OF STATIONS 4 ( 1544 ' MU~i "2CC1967 0.00238 "")'" ' ( T522 " ""~ bFT" 18SE1967 CTil'123") ("1531 GH1 25SE1<367 0.02536 1 I 1350 3H 2 15AP1967 0.00220 I 1 Thalassiosira levanderi Van Goor Thalassiosira levanderi Van Goor, Rec. Trav. Bot. Neerlandis, 21:322, fig. 11. 1924. Cells cylindrical with slightly convex valve surfaces, specimens from Lake Michigan 8-l-9y in diameter. Ornamentation of the valve surface com- posed of irregularly -arranged areolae, about 20-22 in lOy near the center of the valve, becoming finer near the margins. At the margins of the valve there is a corona of spines, about 10 in lOu. These spines appear to be of two varieties, larger, tubular spines rather evenly spaced with 3-4 smaller, apparently solid spines between. Two to three conspicuous slime pores occur near the center of the valve. Only occasional specimens of this entity have been noted in collections from Lake Michigan. Coll: 1197. Thalassiosira visurgis Hust. Thalassiosira visurgis Hustedt, Abh. Naturw. Ver. Bremen, 34(3) :207, pi. 1, figs. 1-4. 1957. Cells cylindric with slightly convex valve faces. Specimens from Lake Michigan 14-23u in diameter. Ornamentation of the valve surface composed of more or less radially-arranged areolae, about 16 in lOu near the center of the valve, becoming slightly finer near the margins. A submarginal corona of small spines, 14-15 in lOy, is present and in addition 2 (rarely 1-4) much larger spines arise just interior to the circlet of smaller spines. These spines are usually about 120° from one another. Usually a single slime pore is present near the geometric center of the valve. 206 The limited number of previous reports available indicates that this entity occurs in inland waters of relatively high dissolved solids content as well as in brackish water. 717 THSPECOA TCJLMLOF STATICNS ( 1317 ..._ -6—1 _._ 6N01964 40C1967 20C1967 0.0C191 ) 0.00472 I 0.0C23S ) ( 1557 ( 1563 1 1531 GS 4 GS11 GH 1 30C1967 5001967 25SE1967 C. 00747 ) 0.00234 ) C. 20287 ) ( 1559 CS 7 GS28 UL 1 40C1967 60C1967 20C1967 ( 1560 ( 1544 gs a Ml) 1 ( 1575 ( 1545 C. 00129 ) C.0C676 ) ( 1548 CA 1 30C1567 0.01272 1 ( 14C1 HC 2 6HY1967 C. 00586 ) ( 1422 CA 2 23KY1967 C. 00511 ) Genus Tropidoneis Cleve Cleve, Diatomist, 1:22. 1890. Although most members of the genus Tropidoneis are restricted to marine or brackish-water habitats, the single representative that occurs in our collections is widely reported from strictly freshwater situations. It reaches its maximum abundance in benthic communities but apparently adopts planktonic existence with facility and is often taken in plankton collections. Tropidoneis lepidoptera var. probosoidea Cleve Tropidoneis lepidoptera var. probosoidea Cleve, K. Svenska Vet.-Akad. Handl., Ny Foljd, 26(2): 25. 1894. 718 TRIEFIVP TCT HC CF STATICOS 146750 EV 24SE1«7 0.0C471 ) (46762 EV 18KR1938 C.02206~~ j ( 1571 ( 1553 SG 1. 60C.1967 .0.00734 I. { 1421_ CH_ 2 23MY.1967 0.01735 ) ( Species inoertae sedis Tropidoneis sp. #1. JUS TasPFr.nA tct nt tf STATirKS (1240 _Q_6__-_ 1C1NA564 0.CC153 ) 73.202 SEC. CPU TIME 207 CONCLUSIONS It is apparent from the areal and temporal distribution of dominant plankton diatoms in Lake Michigan that certain entities are associated with certain broadly defined conditions of water quality. Certain taxa, notably Cyolotella oomta, C. operoulata, C. ooellata and Melosira distorts, are apparently relatively important constituents of only extremely oligo- trophic floras and are rapidly replaced in disturbed portions of the lake. These entities, with the exception of M. distans , are still found in the offshore flora of Lake Michigan although they appear to be relatively less abundant than they previously were, particularly in the southern basin of the lake. Reduction in the relative abundance of these entities is among the first indications of disturbance of the ecosystem that ap- pears in phytoplankton assemblages. Several entities which are relatively more abundant in the plankton flora appear to be somewhat more tolerant of changing conditions but are rapidly reduced in abundance with extensive chemically measurable change. Notable examples of this tendency are found among some of the modern off- shore plankton dominants such as Tdbellaria fenestrata, Melosira islandica, Rhizosolenia eriensis , Stephanodisous transilvanious , Synedra ulna var. ohaseana, C. miohiganiana and C. kuetzingiana . Decline in relative abun- dance of these taxa is the first indication of serious disturbance of areas within the Lake Michigan ecosystem. Other entities which are relatively abundant in undisturbed portions of the lake appear to be favored by slight increases in trophic level and flourish in moderately disturbed portions of the lake. They initially show an increase in relative abundance only to decline if pollution in- creases. Some notable examples of this tendency are Asterionella formosa, Fragilaria erotonensis, Stephanodisous alpinus, S. minutus , S. niagarae, S. hantzsohii , Synedva delioatissima, S. ulna var. danioa, S. ostenfeldii and S, filiformis. Decline in the relative abundance of these species in the plankton flora is usually accompanied by obvious decline in water quality and disturbance in higher trophic levels of the ecosystem such as the fish and benthic invertebrate faunas. A number of species which were formerly apparently able to thrive only in naturally eutrophic estuaries and inshore areas of the lake are favored by increasing pollution and are able to flourish in highly dis- turbed portions of the open lake. Some of the more abundant entities showing this pattern of distribution are Melosira granulata and its varie- ties, Fragilaria oapucina and its varieties, F. oonstruens, F. intermedia and Stephanodisous tenuis. Within this group Melosira granulata appears to be less successful in the offshore flora than might be expected from its usual dominance in smaller eutrophic lakes, probably due to its tem- perature tolerance. Its varieties appear to favor even higher trophic levels and become most abundant in extremely disturbed environments. On the other hand, the varieties of Fragilaria oapucina appear to be better 208 adapted to existence in the offshore flora than the nominate variety. The species in this group presently are dominant in highly disturbed areas such as the nearshore waters of the southern basin of Lake Michigan and Green Bay. Most of them are best adapted to the ecosystem of smaller lakes, and with further disturbance of the system they will likely be re- placed by entities in the following category. The single exception to this is Stephanodisaus tenuis which is well adapted to existence in the Great Lakes and which has become dominant in the plankton floras of Lake Ontario and Lake Erie. • . The final general group of dominant plankton species includes those taxa which were apparently not able to live in Lake Michigan in its ori- ginal condition and which have been introduced following pollution. In- cluded in this group are such species as Asterionella bleakleyi, Diatoma tenue var. elongation, Stephanodisaus binderanus , S. subtilis , Nitzsohia dissipata and finally the species of Thalassiosira and Coscinodiscus now present. Within this group Diatoma tenue var. elongatum, Nitzsohia dis- sipata, Stephanodisaus binderanus and S. subtilis first appear in our samples from the late 1930' s. Ahlstrom (1936) reported Diatoma tenue var. elongatum from samples taken in the early 1930' s and it is possible that some of the populations he reported as Stephanodisaus hantzsohii may belong to either S. binderanus or S. subtilis. Nitzsahia dissipata is a very widely distributed organism and seems to become moderately abundant in eutrophic lakes in many localities. Perhaps the most interest- ing taxon in this group from the standpoint of direct effects on water quality is S. binderanus. From the time of its introduction, probably sometime in the early 1930's, it increased in abundance to the point that it caused serious problems with short filter runs at the Chicago filtra- tion plant in the mid and late 1950's (Vaughn 1961). At the present time it is dominant in the spring flora at some stations in the extreme southern basin and in Green Bay. It also seems to be increasing at the offshore stations as a considerable increase was noted between comparable stations in 1964 and 1967. It should be pointed out that estimates of the increase in abundance in this particular nuisance organism are probably highly con- servative because its peak abundance is associated with the development of the thermal bar (Stoermer 1968). The final series of taxa, members of the genera Thalassiosira and Coscinodiscus , which appear to have been intro- duced into Lake Michigan sometime after 1945, apparently represent the end members of the pollution sequence in the Great Lakes, so far as the plankton diatom flora is concerned. At the present time the distribution of these entities in Lake Michigan is quite restricted. Coscinodiscus subsalsus has become one of the dominant species in Lake Erie and can be expected to increase dramatically as pollution of the lake continues. Consideration of distribution and relative abundance of the major components of the plankton flora leads one to the conclusion that Lake Michigan is probably at the present time about at the "break point" be- tween rather moderate and transient algal nuisances, largely confined to the inshore waters, and drastic and most likely irreversible changes in the entire ecosystem. As pointed out above, all of the plankton diatoms associated with extreme water quality degradation in the Great Lakes 209 system are now present in Lake Michigan. While the end members of the sequence are now present in only negligible numbers, the apparently ac- celerating increase in S. binderanus is disturbing both from the stand- point of its direct effect on water quality and because of the effects on the total system its presence indicates. Based on our qualitative evaluation of floristic changes in Lake Michigan it appears that rever- sal of the present trends will depend largely upon actions taken within the next, at most, ten years. It should be emphasized here that the samples available to us tend to introduce a conservative bias to these considerations. The early samples are all from the area which was ear- liest and most severely affected. Many of our recent samples come from the areas of the lake furthest removed from, and least affected by man's activities. This, unfortunately, shows only the worst conditions in Lake Michigan at the early dates and a spectrum including the best conditions in the recent samples. While local pollution problems affecting the qualitative aspects of the plankton diatom flora have been present for a long time, it should be pointed out that the floras of these inshore areas have now been very drastically altered and, more importantly, that the effects of pollution now are becoming increasingly evident through- out the system. The areal distribution of the major plankton dominant taxa follows the trends one would expect from consideration of the location of major effluent sources with one striking exception. The plankton floras of southern Green Bay and local areas surrounding harbors and major stream mouths most strongly differ from the flora of the open lake. The ex- treme southern crescent of the lake, from Chicago to Benton Harbor, Michigan, is also obviously and strongly affected. Somewhat surprisingly, it also appears that the Ludington-Manis tee-Frankfort area of the northern Michigan coast is apparently quite substantially disturbed. From the qualitative aspects of the flora it is suggested that this disturbance is largely the result of shifts in the conservative element balance rather than particularly high nutrient levels. From considerations of effluent sources and the morphometry of Lake Michigan, it is tempting to assume that the southern basin of the lake might be much more strongly affected by pollution than the northern basin. Our results tend to indicate that this is only partially true. It appears that the nearshore floras of the southern basin are more strongly affected than similar areas in the northern basin. On the other hand, more recent blooms of introduced or- ganisms appear at stations in the northern basin also. One of the striking observations from the present study is the large number of rare species that were recorded from our collections. We en- tered this study with the apparently rather naive assumption that the offshore plankton of Lake Michigan would not be available to other than euplanktonic forms and thus the plankton assemblages would resemble true oceanic plankton more than limnoplankton. This assumption proved to be, at best, only partially correct. On a quantitative basis it is true that ten or less entities usually comprise more than ninty percent of the total assemblage. It is also true, however, that these major dominants rarely exceed twenty percent of the species noted at a given station. In a given 210 assemblage a certain fraction of these minor species are euplanktonic forms present in low abundance. In almost all collections there are also sizable fractions of entities that are obviously derived from habitats other than the plankton. As would be expected, these entities are most abundant in collections taken from shallow water areas but they are also represented in the majority of collections taken even from midlake sta- tions. The significance of this component of the flora is very difficult to determine. Included in it are a large number of apparent new records for the United States and a number of entities which are apparently un- described. I have previously speculated (1967) that one of the effects of nutrient pollution in Lake Michigan is to render the plankton environ- ment more accessible to entities which find their primary habitat in ben- thic assemblages. The results of this study would tend to support this contention. Any assessment of the impact this component of the flora has on practical problems in water quality control, or even of their value as indicators of environmental conditions, is extremely difficult at the present time. A good deal of further work will be necessary be- fore this information can be reduced to a useful context. It is, how- ever, obvious that any realistic attempt to treat the factors operational in the Great Lakes ecosystem must account for this component of the biota which has never, as yet, been investigated in a systematic manner. Prior to 1966 slightly less than 350 taxa of diatoms had been reported from Lake Michigan. Removal of the obvious synonyms from this list re- duces this number to something less than 300. In the present study more than 700 morphologically distinguishable entities were noted. Considering the fact that only plankton collections, which are depauperate in species compared to periphyton collections, were examined, it is obvious that our knowledge of the biological operators at this level of the Lake Michigan ecosystem is still quite primitive. There is still need for critical taxonomic revision of some of the genera present. This is particularly true of some of the highly variable planktonic genera such as Synedva and Fragilaria. Even for the entities well enough known so that it is pos- sible to make firm statements about their taxonomic relationships, there is still a critical lack of knowledge regarding life cycles and quantita- tive environmental requirements. Of the entities treated here, the com- plete life cycles of less than twenty are fully known. For even fewer is there any trustworthy experimental information regarding nutrient and other environmental requirements. If we are ever to be able to gain the neces- sary insight to understand and manage large aquatic ecosystems, such as Lake Michigan, such information must be forthcoming. It is hoped that this study will furnish part of the necessary background to implement such studies. When working with large, complex and variable assemblages as was necessary in this study, it is tempting to seek some measure of the dis- tribution of populations within the various assemblages which will furnish insight into the factors affecting them. One of the obvious statistical devices to employ in this context is diversity analysis. One approach to this has been used by a group at the Academy of Natural Sciences of Phila- delphia with apparent success in determining the effects of pollution on 211 stream diatom populations (Patrick, Hohn and Wallace 1954; Patrick 1963, 1964). In the present study, preliminary analysis of the method utilized by these workers indicated serious difficulty in applying it to plankton diatom populations in Lake Michigan. Their diversity calculations are based on the log normal population model advanced by Preston (1948). Hutchinson (1967) has pointed out that in plankton assemblages tolerable fit to a log normal curve may be achieved but that the mode remains at the origin even if very large assemblages are considered. In our analy- sis we adopted an information theory based diversity estimate which has been used, with apparent success, in determining shifts in subfossil dia- tom populations (Stockner and Benson 1967; Stoermer and Yang 1968). The results of this analysis are presented in appendix "A." Although this manipulation brought to light some points of interest, it is emphasized that diversity alone furnishes very little information regarding the trophic status of Lake Michigan plankton diatom populations. If all the assemblages are considered, the modal diversity values fall at 1.80 and the modal redundancy values fall at 0.60. If localities are considered it is apparent that the extremes, both high and low, of diversity and re- dundancy are found in harbor collections. If the offshore stations are considered it is apparent that the range of diversity values recorded at a given sampling station on successive sampling dates is, in most in- stances, fully as great as the difference between any two offshore sampl- ing stations at a given date. On the basis of our observations there is a slight tendency for the average diversity, as measured by the index employed, to increase with eutrophication in Lake Michigan and for re- dundancy values to be reduced. This picture is complicated by the fact that most areas of the lake that are appreciably affected are also in nearshore localities which are more easily invaded by entities arising from benthic communities. The following picture emerges from our consideration of diversity plankton diatom assemblages in Lake Michigan. Before the influence of man's activities, nutrients were at such low levels that many potential occupants of the habitat were effectively excluded. This is reflected in assemblages of rather low diversity. In addition plankton populations are strongly affected by seasonal succession. The dominant populations wax and wane during the seasonal cycle and these shifts are strongly re- flected in diversity estimates derived from samples taken at successive points in time. It will be noted that the spring bloom tends to depress diversity and the progression of this bloom can be traced from south to north during 1964 and 1967 by reference to the diversity values given in appendix "A." During this stage in succession average diversity values will be low and extremes, both high and low, will be minimized. With addition of nutrients to such an environment it will be rendered avail- able to more taxa, but the added nutrients will also allow increased popu- lation densities of the dominant taxa during blooms. This produces the effect that we presently- see in Lake Michigan. There is a slight average increase in diversity but the extreme high and low values found in speci- fic spot samples both exceed those found in the unaltered environment. As further nutrients are added, the favored species will occur in in- creasing densities but fewer taxa will be added to the total assemblage. 212 This would produce further spread in the possible values from spot samples, but average diversity values from many samples taken during a given sea- son would closely approximate the values derived from samples from the un- altered environment. With gross pollution the plankton habitat would be denied to many species and those tolerant of such conditions would occur in very high density, hence diversity would be strongly depressed. In previous studies related to water quality, diversity information has largely been used to detect exactly these conditions. This would cer- tainly not be a viable context for the Great Lakes. Because of the ex- tremely long residency time of water in the lakes and because their main utility lies in their aesthetic appeal and as a source for very high-quality potable water, adequate indicative criteria of water quality should be based on more subtle assessments. If the problem of time course considerations could be escaped, diversity measurements would be of much greater value in plankton studies. It should be pointed out that this is exactly the case in studies of fossil assemblages where an integration of the yearly flor- istic succession is obtained. It would appear that this is the reason why diversity measurements are a much more satisfactory tool in these studies. 213 SUMMARY 1. The present study shows a considerably more diverse diatom flora in Lake Michigan than had been reported previously. Contrary to expecta- tions, a substantial number of the entities taken in plankton collections are obviously derived from benthic communities. 2. There has been an increase in the relative numbers of entities associated with degradation of water quality during the period of study. Certain entities associated with moderate to high levels of pollution which were not noted in earlier collections were apparently introduced prior to 1937 and now cause nuisances in certain inshore areas and are becoming increasingly abundant at offshore stations throughout the lake. Certain entities associated with extreme degradation of water quality in the Great Lakes system were introduced into Lake Michigan between 1947 and 1964. Although now present in only low numbers, they indicate the pollution of Lake Michigan is reaching critical levels. 3. Extreme differences exist, particularly at certain times of the year, between the coastal areas and open waters of the lake in terms of both abundance and species composition of the phytoplankton flora. 4. On the basis of the plankton diatom assemblages present, it appears that the most strongly affected areas of Lake Michigan arei the extreme southern crescent of the lake, from Chicago, Illinois, to Benton Harbor, Michigan; the southern portion of Green Bay; the northern Michigan coast in the Ludington-Manis tee-Frankfort area. In addition, local pro- blems exist around most of the major harbors. 5. Our study suggests that diversity estimates, based on single plankton collections, offer relatively little information regarding the condition of the waters sampled. 214 ACKNOWLEDGMENTS We wish to acknowledge the helpful cooperation of the Limnology De- partment of the Academy of Natural Sciences of Philadelphia for loan of much of the material used in this project as well as access to their uni- que reference collections of specimens and literature. Particular appre- ciation is extended to Dr. C. W. Reimer of that institution for pointing out sources of material and for many helpful discussions regarding the taxonomic problems met with during the study. At various phases of the project several individuals gave us material help in machine processing of data. In this regard we wish to acknow- ledge the contributions of Dr. V. E. Noble, now of the Naval Oceanographic Office, Washington, Dr. J. C. K. Huang, now of the Scripps Institution of Oceanography, La Jolla, and Mr. R. Rossmann and Dr. J. A. Robbins of the Great Lakes Research Division staff. 215 LITERATURE CITED (Exclusive of that only cited in synonmy) Ahlstrom, E. H. 1936. The deep water plankton of Lake Michigan, exclu- sive of the Crustacea. Trans. American Micr. Soc, 55(3): 286-299. Andrews, G. W. 1966. Late pleistocene diatoms from the Trempealeau Valley, Wisconsin. U. S. Geol. Surv. Prof. Paper 523A: 324-333. Baylis, J. R. and H. H. Gerstein. 1929. Micro-organisms in the Lake Michigan water at Chicago. 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(1881), 1: 19-20. 1882b. On the food of young whitefish (Coregonus) . Bull. United States Fish. Comm. (1881), 1: 269-270. 1882c. An inquiry into the first food of young lake white- fish (Coregonus clupeiformis). Bull. United States Fish. Comm. (1881), 1: 402-403. 1883. The food of the smaller fresh-water fishes. Bull. Illinois State Lab. Nat. Hist., 1: 65-94. Fott, B. 1935. Phytoplanktonproduktion des Ohrid-Sees. Verh. Internat. Verein. Limnol., 7: 229-237. Gemeinhardt, K. 1926. Die Gattung Synedra in systcnnatischer, zytologis- cher und okologischer Bezeihung. Pf lanzenforsch. , 6: 1-88. Griffith, R. 1955. Analysis of phytoplankton yields in relation to cer- tain physical and chemical factors of Lake Michigan. Ecology, 36: 543-552. Hendey, N. I. 1964. An introductory account of the smaller algae of British coastal waters. Part V: Bacillariophyceae (Diatoms). Ministry of Agriculture, Fisheries and Food, Fisheries Investiga- tions Ser. IV. 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Teil 1: 217 Lieferung 1, seite 1-272, 1927; Lieferung 2, seite 273-464, 1928; Lieferung 3, seite 465-608, 1929; Lieferung 4, seite 609-784, 1930; Lieferung 5, seite 785-920, 1930: Teil 2: Lieferung 1, seite 1-176, 1931; Lieferung 2, seite 177-320, 1932; Lieferung 3, seite 321-432, 1933; Lieferung 4, seite 433-576, 1933; Lieferung 5, seite 577-736, 1937; Lieferung 6, seite 737-845, 1959: Teil 3: Lieferung 1, seite 1-160, 1961; Lieferung 2, seite 161-348, 1962; Lieferung 3, seite 349-556, 1964; Lieferung 4, seite 557-816, 1966. Leipzig, Akademische Verlagsgesellschaf t Geest und Portig K.-G. 1942. Susswasser-Diatomeen des indomalayischen Archipels und der Hawaii-Inseln. Internat. Rev. Hydrobiol., 42: 1-252. ______ 1949. Susswasser-Diatomeen aus dem Albert-Nationalpark in Belgisch-Kongo. Institut des Pares Nationaux du Congo Beige, Ex- ploration du Pare Albert, Mission H. Damas (1935-1936), Fasc. 8. Bruxelles, Marcel Hayez. Hutchinson, G. E. 1967. A treatise on limnology. Vol. II. An intro- duction to lake biology and the limnoplankton. New York, John Wiley and Sons. 1115 p. Jurilj, A. 1954. Flora i Vegetacija Dijatomeja Ohridskog Jezera (Flora and Vegetation of Diatoms from Ochrida Lake in Yugoslavia) . Jugo- slavenska Akad. Znanosti i umjetnosti (Zagreb), 1954: 99-190. Knudson, B. M. 1952. The diatom genus Tabellaria. I. Taxonomy and mor- phology. Ann. Bot. (London), N. S., 16(63): 421-440. Krieger, W. 1927. Zur Biologie des Flussplanktons. Untersuchungen uber das Potomoplankton des Havelgebietes. Pflanzenforsch. , 10: 1-66. Kutzing, F. T. 1844. Die kieselschaligen Bacillarien oder Diatomeen. Nordhausen, Kohne. . 1849. Species Algarum. Leipzig, Brockhaus. Lackey, J. B. 1944. Quality and quantity of plankton in the south end of Lake Michigan in 1942. J. American Water Works Assoc, 36: 669-674. Leighton, M. 0. 1907. Pollution of Illinois and Mississippi rivers by Chicago sewage. U. S. Geol. Surv. Water Supply Paper, 194: 1-369. Meister, F. 1912. Die Kieselalgen der Schweiz. In: Beitrage zur Krypto- gamenflora der Schweiz, Band 4, Heft 1, p. 9-254. Bern, Wyss. National Water Quality Network. 1960. Annual compilation of data, Octo- ber 1, 1959 — September 30, 1960. U. S. Dept. of Health, Education and Welfare, Washington, D. C. . 1961. Annual compilation of data, October 1, 1960 — September 218 30, 1961. U. S. Dept. of Health, Education and Welfare, Washington, D„ C. ' . 1962. Annual compilation of data, October 1, 1961 — September 30, 1962. U. S. Dept. of Health, Education and Welfare, Washington, D„ C. Nipkow, F. 1927. Uber das Verhalten der Skelette planktischer Kieselalgen im geschichten Tiefenschlamm des Zurich und Baldenggersees. Sch- weizerische Zeitschr. Hydrobiol., 4: 71-120. Patrick, R. 1963. The structure of diatom communities under varying ecological conditions. Annals New York Acad. Sci., 108(2): 359-365. . 1964. A discussion of natural and abnormal diatom communi- ties, p. 185-204. In: Algae and Man (D. F. Jackson ed.). New York, Plenum Press. , and C. ,W. Reimer. 1966. The diatoms of the United States exclusive of Alaska and Hawaii. Vol. I. Fragilariaceae, Eunotiaceae, Achnanthaceae, Naviculaceae. Acad. Nat. Sci. Philadelphia, Monogr. 13: 1-688. , M. H. Hohn and J. H. Wallace. 1954. A new method for deter- mining the pattern of the diatom flora. Not. Nat. Acad. Nat. Sci. Philadelphia, 259: 1-12. Petersen, J. B. 1938. Fragilaria intermedia - Synedra vauoheviae ? Bot. Not., 1938: 164-170. Preston, F. W. 1948. The commonness, and rarity, of species. Ecology, 29: 254-283. Reimann, B. E. F. 1960. Bildung, Bau und Zusammenhang der Bacillariophy- ceenschalen. Nova Hedwigia, 2(1/2): 349-373. Skabitschewsky, A. P. 1960. Planktonnge Diatomovye Vodoroski Presnykh Vod SSSR. Sistematika Ekologiya i Rasprostranenie, Mater. K. Poznan. Fauny Flory SSSR 0 del Bot., N. S., Vyp. 11(19): 291-296. Skvortzow, B. V. 1937. Diatoms from Lake Michigan. I. American Midland Nat., 18(4): 652-658. Stockner, J. G. and W. W. Benson. 1967. The succession of diatom assem- blages in the recent sediments of Lake Washington. Limnol. Oceanog., 12: 513-532. Stoermer, E. F. 1967. An historical comparison of offshore phytoplankton populations in Lake Michigan. Univ. Michigan, Great Lakes Res. Div. Spec. Rep. 30: 47-77. 219 1968. Nearshore phytoplanktoti populations in the Grand Haven, Michigan, vicinity during thermal bar conditions. Proc. 11th. Conf. Great Lakes Res., 1968: 137-150. Internat. Assoc. Great Lakes Res. and E. Kopczynska. 1967. Phytoplankton populations in the extreme southern basin of Lake Michigan, 1962-1963. Proc. 10th Conf. Great Lakes Res., 1967: 88-106. Internat. Assoc. Great Lakes Res. , and J. J. Yang. 1968. A preliminary report of the fossil dia- tom flora from Lake Huron sediments. Proc. 11th Conf. Great Lakes Res., 1968: 253-267. Internat. Assoc. Great Lakes Res. Thomas, B. W. and H. H. Chase. 1887. Diatomaceae of Lake Michigan as collected during the last 16 years from the water supply of the city of Chicago. No.tarisia, 2(6): 328-330. Thompson, H. D. 1896. Report on the plants. Bull. Michigan Fish. Comm., 6: 72-75. Van Heurck, H. F. 1880-1885. Synopsis des Diatomees de Belgique. Atlas, pis. 1-30 & bis 22 (1880); Atlas, pis. 31-77 & bis 53 (1881); Atlas, pis. 78-103 & bis 82, bis 83, ter 83, bis 95 (1882); Atlas, pis. 104-132 (1883). Anvers, J. Ducaju & Cie. Table Alphabetique des Noms Generiques et Specif iques et des Synonymes contenus dans l1 Atlas. 120 p. Anvers, J. F. Dieltjens (1884). Texte. 235 p. Suppl. pi. A, B, C. Anvers, Mtin Brouwers & Co. (1885). Vaughn, J. C. 1961. Coagulation difficulties of the south district fil- tration plant. Pure Water, 13(3): 45-49. . 1962. Operation of the south district filtration plant, 1961. Pure Water, 14(2): 34-49. Ward, H. B. 1896. A biological examination of Lake Michigan in the Tra- verse Bay region. Bull. Michigan Fish. Comm., 6i 1-71. Williams, L. G. 1962. Plankton population dynamics. U. S. Public Health Serv., National Water Qual. Network, Suppl. 2: 1-90. . 1964. Possible relationship between plankton diatom species and water quality estimates. Ecology, 45(4): 809-823. , and C. Scott. 1962. Principal diatoms of major waterways of the United States. Limnol. Oceanog., 7(3): 365-379. 220 Appendix A List of Collections Collections listed without alphabetical prefix are housed in the collection of the Great Lakes Research Division. Those with the prefix ANSP are the property of and are housed at the Academy of Natural Sciences, Philadelphia. In the case of collections in which the diatom assemblage has been analyzed in detail the following characteristics are listed: the total number of species present, the total number of c,specimens in the as- semblage, an estimate of diversity computed as _V . . . where pi th i=1 represents an estimate of the proportion of the i species, and an esti- mate of redundancy computed as R= 1-H/lnS. Other collections have been examined in greater or lesser detail but have not been counted. 221 804 Shore plankton from beach near entrance to Wilderness St. Park, Michigan. Coll: E. F. Stoermer. 28 Sept. 1965. 810 Surface plankton from north side of Mackinaw City Public Dock, Mackinaw City, Michigan. Coll: E. F. Stoermer. 28 Sept. 1965. 826 Surface plankton from river side of breakwater, Elk River. Coll: E. F. Stoermer. 29 Sept. 1965. 827 Surface plankton from Lake Michigan side of breakwater, Elk River, Michigan. Coll: E. F. Stoermer. 29 Sept. 1965. 841 Surface plankton, Muskegon Lake, Michigan, near harbor entrance. Coll: E. F. Stoermer. 4 Oct. 1965. 842 Surface plankton, Lake Michigan, 7 mi at 210° from White Lake, Michigan, inlet, 9 mi 300° from Muskegon, Michigan, inlet. Coll: E. F. Stoermer. 5 Oct. 1965. 844 Plankton, surface, Station A-3. 42°05'30"N; 86°43,00"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 845 Plankton, 5 meters, Station A-3. 42°05'30"N; 86o43'00"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 846 Plankton, 15 meters, Station A-3. 42o05'30"N; 86°43'00MW. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 847 Plankton, surface, Station A-4. 42°03»30"N; 87°06'30"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 848 Plankton, 5 meters, Station A-4. 42°03'30tIN; 87o06'30"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 849 Plankton, 15 meters, Station A-4. 42°03'30"N; 87°06'30"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 850 Plankton, surface, Station A-6. 41°52,00"N; 87°27'00"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 851 Plankton, 5 meters, Station A-6. 41°52'00"N; 87°27'00"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 852 Plankton, 15 meters, Station A-6. 41o52'00"N; 87°27*00"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 853 Plankton, surface, Station C-3. 42°49,10"N; 86028'25"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 854 Plankton, 5 meters, Station C-3. 42°49,10"N; Se^^'V. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 855 Plankton, 15 meters, Station C-3. 42o49'10"N; 86°28'25"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500ml). 222 856 Plankton, surface, Station C-5. 42°49?00"N:; 86°50'00MW. E. F. Stoermer. 12 Nov. 1965 (500 ml). Coll: 857 Plankton, 5 meters, Station C-5 E. F. Stoermer. 12 Nov. 1965 858 Plankton, 15 meters, Station C- E. F. Stoermer. 12 Nov. 1965 859 Plankton, surface, Station C-7. E. F. Stoermer. 12 Nov. 1965 860 Plankton, 5 meters, Station C-7 E. F. Stoermer. 12 Nov. 1965 861 Plankton, 15 meters, Station C- E. F. Stoermer. 12 Nov. 1965 862 Plankton, surface, Station D-2. E. F. Stoermer. 12 Nov. 1965 863 Plankton, 5 meters, Station D-2 E. F. Stoermer. 12 Nov. 1965 864 Plankton, 15 meters, Station D- E. F. Stoermer. 12 Nov. 1965 865 Plankton, surface, Station D-4. E. F. Stoermer. 12 Nov. 1965 866 Plankton, 5 meters, Station D-4 E. F. Stoermer. 12 Nov. 1965 867 Plankton, 15 meters, Station D- E. F. Stoermer. 12 Nov. 1965 868 Plankton, surface, Station D-5. E. F. Stoermer. 12 Nov. 1965 869 Plankton, 5 meters, Station D-5 E. F. Stoermer. 12 Nov. 1965 870 Plankton, 15 meters, Station D- E. F. Stoermer. 12 Nov. 1965 871 Plankton, surface, Station E-2. E. F. Stoermer. 12 Nov. 1965 872 Plankton, 5 meters, Station E-2 E. F. Stoermer. 12 Nov. 1965 873 Plankton, 15 meters, Station E-; E. F. Stoermer. 12 Nov. 1965 874 Plankton, surface, Station E-3. E. F. Stoermer. 12 Nov. 1965 42°49*00"N; 86°50'00"W. Coll: 500 ml). . 42°49'00"N; 86o50'00"W. Coll: 500 ml). 42°47,30,,N;; 87°34f30"W. Coll: 500 ml). 42°47'30"N; 87°34'30"W. Coll: 500 ml). . 42°47'30"N; 87°34'30"W. Coll: 500 ml). 43°56'00"N; 86°39'30"W. Coll: 500 ml). 43°56,00"N; 86°39t30"W. Coll: 500 ml). . 43°56,00"N; 86°39'30"W. Coll: 500 ml). 43°48f00"N; 87°03,00"W. Coll: 500 ml). 43o48«00"; 87°03'00"W. Coll: 500 ml) . . 43°48,00,'N; 87°03,00"W. Coll: 500 ml). 43°38'40"N; 87°31'00"W. Coll: 500 ml). 43°38,40MN; 87°31'00"W. Coll: 500 ml). . 43°38'40"N; 87°31'00"W. Coll: 500 ml). 44°37'00"N; 86°21'42"W. Coll: 500 ml). 44o37,00"N; 86021'42"W. Coll: 500 ml). . 44°37'00"N; 86°21'42"W. Coll: 500 ml). 44°34'00"N; 86°40'00"W. Coll: 500 ml) . 223 875 Plankton, 5 meters, Station E-3. 44o34*00"N; 86°40'00"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 876 Plankton, 15 meters, Station E-3. 44°34'00"N; 86°40'00"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 877 Plankton, surface, Station E-5. 44°25'30"N; 87°10'18"W. Coll; E. F. Stoermer. 12 Nov. 1965 (500 ml). 878 Plankton, 5 meters, Station E-5. 44°25'30"N; 87°10'18"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 879 Plankton, 15 meters, Station E-5. 44°25'30"N; 87°10f18"W. Coll: E. F. Stoermer. 12 Nov. 1965 (500 ml). 883 #25 net surface plankton, 8 mi. at 269° off Grand Haven, Michigan. Coll: E. F. Stoermer. 12 Jan. 1966. 896 Plankton from Grand River in town of Spring Lake, Ottawa County, Michigan. Coll: E. F. Stoermer. 13 April 1966. 898 Plankton, surface, Station A-3. 42°05I30"N; 86°43,00"W. Coll: E. F. Stoermer. 28 March 1966 (500 ml). 899 Plankton, 5 meters, Station A-3. 42°05'30"N; 86°43'00"W. Coll: E. F. Stoermer. 28 March 1966 (500 ml). 900 Plankton, 15 meters, Station A-3. 42°05f30"N; 86°43'00"W. Coll: E. F. Stoermer. 28 March 1966 (500 ml). 901 Plankton, surface, Station A-4. 42°03,30"N; 87°06'30"W. Coll: E. F. Stoermer. 28 March 1966 (500 ml). 902 Plankton, 5 meters, Station A-4. 42°03f30"N: 87°06'30"W. Coll: E. F. Stoermer. 28 March 1966 (500 ml). 903 Plankton, 15 meters, Station A-4. 42°03'30"N: 87o06'30"W. Coll: E. F. Stoermer. 28 March 1966 (500 ml). 904 Plankton, surface, Station A-6. 41o52'00"N; 87o27'00"W. Coll: E. F. Stoermer. 28 March 1966 (500 ml). 905 Plankton, 5 meters, Station A-6. 41°52'00"N; 87°27'00"W. Coll: E. F. Stoermer. 28 March 1966 (500 ml). 906 Plankton, 15 meters, Station A-6. 41o52'00"N; 87°27,00"W. Coll: E. F. Stoermer. 28 March 1966 (500 ml). 907 Plankton, surface, Station C-3. 42°49'10"N; 86°28'25"W. Coll: E. F. Stoermer. 20 March 1966 (500 ml). 908 Plankton, 5 meters, Station C-3. 42°49,10"N; 86°28'25"W. Coll: E. F. Stoermer. 20 March 1966 (500 ml). 909 Plankton, 15 meters, Station C-3. 42°49'10"N; 86°28'25"W. Coll: E. F. Stoermer. 20 March 1966 (500 ml). 224 910 Plankton, surface, Station C-5. 42°49,00"N; 86°50?00"W. Coll: E. F. Stoermer. 20 March 1966 (500 ml). 911 Plankton, 5 meters, Station C-5. 42°49,00"N; 86o50'00"W. Coll: E. F. Stoermer. 20 March 1966 (500 ml). 912 Plankton, 15 meters, Station C-5. 42°49'00"N; 86°50,00"W. Coll: E. F. Stoermer. 20 March 1966 (500 ml). 913 Plankton, surface, Station C-7. 42o47'30"N; 87°34'30,,W. Coll: E. F. Stoermer. 20 March 1966 (500 ml). 914 Plankton, 5 meters, Station C-7. 42°47,30"N;; 87°34'30,IW. Coll: E. F. Stoermer. 20 March 1966 (500 ml). 915 Plankton, 15 meters, Station C-7. 42°47'30"N; 87°34*30"W. Coll: E. F. Stoermer. 20 March 1966 (500 ml). 916 Plankton, surface, Station D-2. 43°56*00"N; 86°39,30"W. Coll: E. F. Stoermer. 3 April 1966 (500 ml). 917 Plankton, 5 meters, Station D-2. 43°56,00"N; 86°39*30"W. Coll: E. F. Stoermer. 3 April 1966 (500 ml). 918 Plankton, 15 meters, Station D-2. 43°56'00"N; 86°39'30"W. Coll: E. F. Stoermer. 3 April 1966 (500 ml). 919 Plankton, surface, Station D-4. 43°48*00"N; 87°03,00"W. Coll: E. F. Stoermer. 3 April 1966 (500 ml). 920 Plankton, 5 meters, Station D-4. 43°48,00"N; 87o03'00"W. Coll: E. F. Stoermer. 3 April 1966 (500 ml). 921 Plankton, 15 meters, Station D-4. 43°48'00"N; 87°03'00"W. Coll: E. F. Stoermer. 3 April 1966 (500 ml). 922 Plankton, surface, Station D-5. 43°38'40"N; 87o31»00"W. Coll: E. F. Stoermer. 3 April 1966 (500 ml). 923 Plankton, 5 meters, Station D-5. 43°38I40MN; 87°31'00"W. Coll: E. F. Stoermer. 3 April 1966 (500 ml). 924 Plankton, 15 meters, Station D-5. 43°38'40"N; 87°31'00"W. Coll: E. F. Stoermer. 3 April 1966 (500 ml). 925 Plankton, surface, Station E-2. 44°37,00"N; 86°21,42','W. Coll: E. F. Stoermer. 6 April 1966 (500 ml). 926 Plankton, 5 meters. Station E-2. 44°37*00"N; 86°21I42"W. Coll: E. F. Stoermer. 6 April 1966 (500 ml). 927 Plankton, 15 meters, Station E-2. 44°37'00"N; 86°21'42"W. Coll: E. F. Stoermer. 6 April 1966 (500 ml). 928 Plankton, surface, Station E-3. 44o34'00"N; 86°40,00"W. Coll: E. F. Stoermer. 6 April 1966 (500 ml). 225 929 Plankton, 5 meters, Station E-3. 44o34*00"N; 86°40'00"W. Coll: E. F. Stoermer. 6 April 1966 (500 ml). 930 Plankton, 15 meters, Station E-3. 44°34,00"N; 86°40'00"W. Coll: E. F. Stoermer. 6 April 1966 (500 ml). 931 Plankton, surface, Station E-5. 44°25'30"N; 87°10,18"W. Coll: E. F. Stoermer. 6 April 1966 (500 ml). 932 Plankton, 5 meters, Station E-5. 44°25,30"N; 87°10'18"W. Coll: E. F. Stoermer. 6 April 1966 (500 ml). 933 Plankton, 15 meters, Station E-5. 44o25'30"N; 87°10'18"W. Coll: E. F. Stoermer. 6 April 1966 (500 ml). 938 Plankton, surface, Station A-3. 42°05,30"N; 86°43'00"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 939 Plankton, 5 meters, Station A-3. 43°05'30"N; 86°43f00"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 940 Plankton, 15 meters, Station A-3. 42°05'30"N; 86°43'00"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 941 Plankton, surface, Station A-4. 42°03,3Q"N; 87°06*30"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 942 Plankton, 5 meters, Station A-4. 42o03»30"N; 87o06'30"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 943 Plankton, 15 meters, Station A-4. 42o03'30"N; 87o06'30"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 944 Plankton, surface, Station A-6. 41°52,00"N; 87°27,00"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 945 Plankton, 5 meters, Station A-6. 41°52'00"N; 87°27,00"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 946 Plankton, 15 meters, Station A-6. 41°52'00"N; 87°27'00"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 947 Plankton, surface, Station B-3. 42°24,00"N; 86o35'20"W. Coll: C. F. Powers. 25 April 1966 (500 ml). 948 Plankton, 5 meters, Station B-3. 42°24'00"N; 86o35'20"W. Coll: C. F. Powers. 25 April 1966 (500 ml). 949 Plankton, 15 meters, Station B-3. 42°24'00"N; 86°35f20"W. Coll: C. F. Powers. 25 April 1966 (500 ml). 950 Plankton, surface, Station B-4. 42°23,30"N; 87°01,30"W. Coll: C. F. Powers. 25 April 1966 (500 ml). 951 Plankton, 5 meters, Station B-4. 42°23'30"N; 87°01'30"W. Coll: C. F. Powers. 25 April 1966 (500 ml). 226 952 Plankton, 15 meters, Station B-4. 42°23'30"N; 87°01,30"W. Coll: C. F. Powers. 25 April 1966 (500 ml). 953 Plankton, surface, Station B-6. 42°22,30"N; 87o30'00"W. Coll: C. F. Powers. 25 April 1966 (500 ml). 954 Plankton, 5 meters, Station B-6. 42o22'30"N; 87o30'00"W. Coll: C. F. Powers. 25 April 1966 (500 ml). 955 Plankton, 15 meters, Station B-6. 42°22,30"N; 87"30»00"W. Coll: C. F. Powers. 25 April 1966 (500 ml). 956 Plankton, surface, Station C-3. 42°49'10"N; 86°28'25"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 957 Plankton, 5 meters, Station C-3. 42°49'10"N; 86°28'25"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 958 Plankton, 15 meters, Station C-3. 42°49'10"N; 86°28,25"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 959 Plankton, surface, Station C-5. 42°49I00"N; 86o50'00"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 960 Plankton, 5 meters, Station C-5. 42o49'00"N; 86°50,00"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 961 Plankton, 15 meters, Station C-5. 42°49'00"N; 86°50'00"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 962 Plankton, surface, Station C-7. 42°47'30"N; 87°34*30"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 963 Plankton, 5 meters, Station C-7. 42o47'30"N; 87o34,30'*W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 964 Plankton, 15 meters, Station C-7. 42°47'30"M; 87o34'30"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 965 Plankton, surface, Station D-2. 43°56'00"N; 86°39'30"W. Coll. E. F. Stoermer. 28 April 1966 (500 ml). 966 Plankton, 5 meters, Station D-2. 43°56'00"N; 86°39,30"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 967 Plankton, 15 meters, Station D-2. 43°56'00"N; 86°39'30"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 968 Plankton, surface, Station D-4. 43°48'00"N; 87°03'00"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 969 Plankton, 5 meters, Station D-4. 43°48'00"N; 87°03'00"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 970 Plankton, 15 meters, Station D-4. 43°48I00"N; 87°03'00"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 227 971 Plankton, surface, Station D-5. 43°38'40"N; 87°31'00"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 972 Plankton, 5 meters, Station D-5. 43o38'40*'N; 87°31'00"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 973 Plankton, 15 meters, Station D-5. 43°38'40"N; 87°31'00"W. Coll: E. F. Stoermer. 28 April 1966 (500 ml). 974 Plankton, surface, Station E-2. 44°37f00"N; 86°21'42"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 975 Plankton, 5 meters, Station E-2. 44o37'00"N; 86°21»42"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 976 Plankton, 15 meters, Station E-2. 44°37'00"N; 86°21'42"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 977 Plankton, surface, Station E-3. 44°34'00,,N; 86o40'00"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 978 Plankton, 5 meters, Station E-3. 44°34'00"N; 86°40*00"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 979 Plankton, 15 meters, Station E-3. 44°34,00"N; 86°40»00"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 980 Plankton, surface, Station E-5. 44°25,30,,N; 87°10'18"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 981 Plankton, 5 meters, Station E-5. 44°25'30"N; 87°10'18"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 982 Plankton, 15 meters, Station E-5. 44°25'30"N; 87°10'18"W. Coll: E. F. Stoermer. 26 April 1966 (500 ml). 983 Plankton, surface, Station A-3. 42°05'30"N; 86°43'00"W. Coll: E. F. Stoermer. 15 May 1966 (500 ml). 984 Plankton, 5 meters, Station A-3. 42o05'30MN; 86°43'00"W. Coll: E. F. Stoermer. 15 May 1966 (500 ml). 985 Plankton, 15 meters, Station A-3. 42°05'30"N; 86o43'00"W. Coll: E. F. Stoermer. 15 May 1966 (500 ml). 986 Plankton, surface, Station A-4. 42o03'30"N; 87°06t30"W. Coll: E. F. Stoermer. 15 May 1966 (500 ml). 987 Plankton, 5 meters, Station A-4. 42°03'30"N; 87°06'30"W. Coll: E. F. Stoermer. 15 May 1966 (500 ml). 988 Plankton, 15 meters, Station A-4. 42°03,30"N; 87°06'30"W. Coll: E. F. Stoermer. 15 May 1966 (500 ml). 989 Plankton, surface, Station A-6. 41°52*00"N; 87°27'00,IW. Coll: E. F. Stoermer. 15 May 1966 (500 ml). 228 990 Plankton, 5 meters, Station A-6. 41°52'00"N; 87°27'00"W. Coll: E. F. Stoermer. 15 May 1966 (500 ml). 991 Plankton, 15 meters, Station A-6. 41°52'00"N; 87°27'00"W. Coll: E. F. Stoermer. 15 May 1966 (500 ml). 992 Plankton, surface, Station B-3. 42°24'00"N; 86o35'20"W. Coll: C. F. Powers. 16 May 1966 (500 ml). 993 Plankton, 5 meters, Station B-3. 42°24f00"N; 86°35'20"W. Coll: C. F. Powers. 16 May 1966 (500 ml). 994 Plankton, 15 meters, Station B-3. 42°24I00"N; 86o35'20"W. Coll: C. F. Powers. 16 May 1966 (500 ml). 995 Plankton, surface, Station B-4. 42°23'30"N; 87°01'30"W. Coll: C. F. Powers. 16 May 1966 (500 ml). 996 Plankton, 5 meters, Station B-4. 42°23'30"N; 87°01'30"W. Coll: C. F. Powers. 16 May 1966 (500 ml). 997 Plankton, 15 meters, Station B-4. 42°23'30"N; 87°01'30"W. Coll: C. F. Powers. 16 May 1966 (500 ml). 998 Plankton, surface, Station B-6. 42°22'30"N; 87°30'00"W. Coll: C. F. Powers. 16 May 1966 (500ml). 999 Plankton, 5 meters, Station B-6. 42°22'30"N; 87°30'00"W. Coll: C. F. Powers. 16 May 1966 (500 ml). 1000 Plankton, 15 meters, Station B-6. 42°22,30"N; 87°30'00"W. Coll: C. F. Powers. 16 May 1966 (500 ml). 1001 Plankton, surface, Station C-3. 42°49'10I1N; 86°28*25"W. Coll: E. F. Stoermer. 16 May 1966 (500 ml). 1002 Plankton, 5 meters, Station C-3. 42°49'10"N; 86°28'25"W. Coll: E. F. Stoermer. 16 May 1966 (500 ml). 1003 Plankton, 15 meters, Station C-3. 42°49'10"N; 86°28'25"W. Coll: E. F. Stoermer. 16 May 1966 (500 ml). 1004 Plankton, surface, Station C-5. 42°49'00"N; 86°50'00"W. Coll: E. F. Stoermer. 16 May 1966 (500 ml). 1005 Plankton, 5 meter, Station C-5. 42°49'00"N; 86°50,00"W. Coll: E. F. Stoermer. 16 May 1966 (500 ml). 1006 Plankton, 15 meters, Station C-5. 42°49'00"N; 86o50'00"W. Coll: E. F. Stoermer. 16 May 1966 (500 ml). 1007 Plankton, surface, Station C-7. 42°47'30"N; 87°34'30"W. Coll: E. F. Stoermer. 16 May 1966 (500 ml). 1008 Plankton, 5 meters, Station C-7. 42°47'30"N; 87°34'30MW. Coll: E. F. Stoermer. 16 May 1966 (500 ml). 229 1009 Plankton, 15 meters, Station C-7. 42o47'30"N; 87°34'30"W. Coll: E. F. Stoermer. 16 May 1966 (500 ml). 1010 Plankton, surface, Station D-2. 43°56'00"N; 86°39I30"W. Coll: E. F. Stoermer. 17 May 1966 (500 ml). 1011 Plankton, 5 meters, Station D-2. 43°56'00"N; 86°39'30"W. Coll: E. F. Stoermer. 17 May 1966 (500 ml). 1012 Plankton, 15 meters, Station D-2. 43°56'00"N; 86°39'30"W. Coll: E. F. Stoermer. 17 May 1966 (500 ml). 1013 Plankton, surface, Station D-4. 43°48'00"N; 87°03,00"W. Coll: E. F. Stoermer. 17 May 1966 (500 ml). 1014 Plankton, 5 meters, Station D-4. 43°48'00"N; 87°03!00"W. Coll: E. F. Stoermer. 17 May 1966 (500 ml). 1015 Plankton, 15 meters, Station D-4. 43°48'00"N; 87°03'00"W. Coll: E. F. Stoermer. 17 May 1966 (500 ml). 1016 Plankton, surface, Station D-5. 43°38'40"N; 87°31'00"W. Coll: E. F. Stoermer. 17 May 1966 (500 ml). 1017 Plankton, 5 meters, Station D-5. 43o38'40"N; 87°31*00"W. Coll: E. F. Stoermer. 17 May 1966 (500 ml). 1018 Plankton, 15 meters, Station D-5. 43°38»40"N; 87°31'00"W. Coll: E. F. Stoermer. 17 May 1966 (500 ml). 1019 Plankton, surface, Station E-2. 44°37?00"N; 86°21'42"W. Coll: E. F. Stoermer. 20 May 1966 (500 ml). 1020 Plankton, 5 meters, Station E-2. 44o37'00"N; 86°21'42"W. Coll: E. F. Stoermer. 20 May 1966 (500 ml). 1021 Plankton, 15 meters, Station E-2. 44°37,00"N; 86°21'42"W. Coll: E. F. Stoermer. 20 May 1966 (500 ml). 1022 Plankton, surface, Station E-3. 44°34,00"N; 86°40'00"W. Coll: E. F. Stoermer. 20 May 1966 (500 ml). 1023 Plankton, 5 meters, Station E-3. 44°34'00"N; 86°40'00"W. Coll: E. F. Stoermer. 20 May 1966 (500 ml). 1024 Plankton, 15 meters, Station E-3. 44°34'00"N; 86°40'00"W. Coll: E. F. Stoermer. 20 May 1966 (500 ml). 1025 Plankton, surface, Station E-5. 44°25*30"N; 87°10'18"W. Coll: E. F. Stoermer. 20 May 1966 (500 ml). 1026 Plankton, 5 meters, Station E-5. 44°25'30"N; 87°10,18"W. Coll: E. F. Stoermer. 20 May 1966 (500 ml). 1027 Plankton, 15 meters, Station E-5. 44°25'30"N; 87°10'18"W. Coll: E. F. Stoermer. 20 May 1966 (500 ml). 230 1033 Plankton (#25 net), Garden Creek, near outlet in town of Garden, Delta County, Michigan. Sec. 17, R18W, Twp 39N. Coll: E. F. Stoermer. 20 June 1966. 1035 Plankton near shore (#25 net) , fishing access site near town of Garden, Delta County, Michigan. Sec. 18, R18W, T39N. Coll: E. F. Stoermer. 20 June 1966. 1042 Shore plankton (#25 net), Sack Bay, Delta County, Michigan. Sec. 30, R19W, T38N. Coll: E. F. Stoermer. 20 June 1966. 1044 Shore plankton (#25 net), Sand Bay, near Fayette State Park, Delta County, Michigan. Sec. 9, R19W, T38N. Coll: E. F. Stoermer. 20 June 1966. 1046 Shore plankton (#25 net), Fayette Harbor, Fayette State Park, Delta County, Michigan. Sec. 4, R19W, T38N. Coll: E. F. Stoermer. 20 June 1966. 1056 Plankton, Harbor of Manistique, Schoolcraft County, Michigan. Sec. 12, R16W, T41. Considerable wood detritus, depauperate algal flora. Coll: E. F. Stoermer. 21 June 1966. 1060 Plankton - from ferry dock, St. Ignace, Mackinac County, Michigan. Sec. 18, R3W, T40N. Coll: E. F. Stoermer. 21 June 1966. 1092 Shore plankton from harbor, Cross Village. Sec. 33, R6W, T38N. Emmet County, Michigan. Coll: E*. F. Stoermer. 23 June 1966. 1094 Shore plankton, City Park, Harbor Springs. Sec. 13, R6W, T35N. Emmet County, Michigan. Coll: E. F. Stoermer. 23 June 1966. 1095 1096 Shore plankton, tile outlet just east of "Irish Marina." Sec. 18, R5W, T35N. Harbor Springs, Emmet County, Michigan. Coll: E. F. Stoermer. 23 June 1966. Plankton, Petoskey HarborD Sec. 31, R5W, T35N. Emmet County, Michigan. Coll: E. F. Stoermer. 23 June 1966. 1100 Plankton ship channel, Charlevoix. Sec. 27, R8W, T34N. Charlevoix County, Michigan. Coll: E. F. Stoermer. 23 June 1966. 1102 Plankton, Lake Charlevoix, Charlevoix City Dock. Sec. 26, R8W, T34S. Charlevoix County, Michigan. Coll: E. F. Stoermer. 23 June 1966. 1105 Plankton, river side of breakwater, Elk Rapids. Sec. 20, R9W, T29N. Antrim County, Michigan. Coll: E. F. Stoermer. 23 June 1966. 1108 Shore plankton, harbor of Traverse City. Sec. 6, R10W, T27N. Grand Traverse County, Michigan. Coll: E. F. Stoermer. 23 June 1966. 1114 Plankton, Lake Michigan, 100 yds from confluence of Platte River. Sec. 20, R15W, T27N. Benzie State Park, Benzie County, Michigan. Coll: E. F. Stoermer. 23 June 1966. 231 1116 Plankton, Platte River, at confluence with Lake Michigan. Sec. 20, R15W, T27N. Benzie State Park, Benzie County, Michigan. Coll: E. F. Stoermer. 23 June 1966. 1121 Plankton, Lake Michigan just outside Frankfort breakwater. Sec. 28, R16W, T26N. Benzie County, Michigan. Coll: E. F. Stoermer. 24 June 1966. 1122 Plankton, Frankfort Harbor, just inside breakwater. Sec. 28, R16W, T26N. Benzie County, Michigan. Coll: E. F. Stoermer. 24 June 1966. 1125 Plankton just outside breakwater, Manistee. Sec. 3, R17W, T21N. Manis- tee County, Michigan. Coll: E. F. Stoermer. 24 June 1966. 1126 Plankton just inside breakwater, Manistee. Sec. 3, R17W, T21N. Manistee County, Michigan. Melosira dominant. Coll: E. F. Stoermer. 24 June 1966. 1128 Plankton inside harbor, Ludington. Sec. 16, R18W, T18N. Mason County, Michigan. Coll: E. F. Stoermer. 24 June 1966. 1130 Plankton just outside harbor, Ludington. Sec. 16, R18W, T18N. Mason County, Michigan. Coll: E. F. Stoermer. 24 June 1966. 1132 Shore plankton shallow water in Muskegon Lake, pier across from State Park office. Sec. 22, R17W, T10N. Muskegon State Park, Muskegon County, Michigan. Coll: E. F. Stoermer. 25 June 1966. 1135 Plankton, Muskegon Lake, just inside ship channel, Sec. 28, R17W, T10N. Muskegon County, Michigan. Coll: E. F. Stoermer. 25 June 1966. 1139 Plankton, inside Muskegon north piers. Sec. 29, R17W, T10N, Muskegon County, Michigan. Coll: E. F. Stoermer. 25 June 1966. 1141 Plankton, outside Muskegon north pier. Sec. 29, R17W, T10N. Muskegon County, Michigan. Coll: E. F. Stoermer. 25 June 1966. 1142 Plankton, 10 yds off campground beach, Muskegon State Park. Sec. 17, R17W, T10N. Muskegon County, Michigan. Coll: E. F. Stoermer. 25 June 1966. 1143 Plankton 100 yds off campground beach, Muskegon State Park. Sec. 17, R17W, T10N. Muskegon County, Michigan. Coll: E. F. Stoermer. 25 June 1966. 1144 Surface #20 net tow, Lake Michigan. Station GA-la. 41°38.4'N; 87°19.0'W. Coll: A. Strong. 19 May 1966. 1145 Surface #20 net tow, Lake Michigan. Station GA-lb. 41038.4'N; 87°19.0*W. Coll: A. Strong. 19 May 1966. 1164 Vertical #20 net tow, 55ft depth. Sleeping Bear Bay, Lake Michigan. Coll: Robert Anderson. 21 June 1966. 1192 Surface #20 net tow. Station PM-1. 45°46'30"N; 85°08'45"W. Lake Michigan. Coll: E. F. Stoermer. 21 Sept. 1966. 232 1193 1194 1195 1196 1197 1198 1199 1200 120.1 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 Surface #20 net tow. Station PM-2. 45°24.0'N; 85°15.0*W. Lake Michi- gan. Mostly zooplankton. Coll: E. F. Stoermer. 21 August 1966. Surface #20 net tow. Station PM-3. 45° 17. 2 'N; 85°55.0'W. Lake Michi- gan. Coll: E. F. Stoermer. 21 August 1966. Surface #20 net tow. Station PM-4. 45o01'18"N; 85o55'00"w. Lake Michigan. Coll: E. F. Stoermer. 22 August 1966. Vertical #20 net tow. Station MP-2. 44°57'48"N Michigan. Coll: E. F. Stoermer. 22 August 1966 Vertical #20 net tow. Station AEC-1. 42°36.0*N gan. Coll: E. F. Stoermer. 19 Sept. 1966. Vertical #20 net tow. Station AEC-2. 42°46.5*N gan. Coll: E. F. Stoermer. 19 Sept. 1966. Vertical #20 net tow. Station AEC-3. 43° 18. 5' N gan. Coll: E. F. Stoermer. 20 Sept. 1966. Vertical #20 net tow. Station AEC-4. 43°54.4'N gan. Coll: E. F. Stoermer. 20 Sept. 1966. Vertical #20 net tow. Station AEC-5. 44°08.7'N gan. Coll: E. F. Stoermer. 21 Sept. 1966. Vertical #20 net tow. Station AEC-6. 44°20.0'N gan. Coll: E. F. Stoermer. 21 Sept. 1966. Vertical #20 net tow. Station AEC-7. 44°28.7'N gan. Coll: E. F. Stoermer. 21 Sept. 1966. Vertical #20 net haul. Station A-l. 42°06'30"N Michigan. Coll: J. Ayers. 26 Sept. 1966. Vertical #20 net haul. Station A-2. 42°06'00"N Michigan. Coll: J. Ayers. 26 Sept. 1966. Vertical #20 net haul. Station A-3. 42°05"30"N Michigan. Coll: J. Ayers. 27 Sept. 1966. Vertical #20 net haul. Station A-4. 42°03"30"N Michigan. Coll: J. Ayers. 27 Sept. 1966. Vertical #20 net haul. Station A-5. 41°57"00"N Michigan. Coll: J. Ayers. 27 Sept. 1966. Vertical #20 net haul, Station A-6. 41°52"00"N Michigan. Coll: J. Ayers. 27 Sept. 1966. Vertical #20 net haul. Station C-l. 42°49V40"N Michigan. Coll: J. Ayers. 26 Sept. 1966. Vertical #20 net haul. Station C-2. 42°49"40"N Michigan. Coll: J. Ayers. 26 Sept. 1966. 86°03'06"W. Lake 86°59.0'W. Lake Michi- 87°02.5'W. Lake Michi- 86° 42. 5 'W. Lake Michi- 86°49.0»W. Lake Michi- 86° 42. 6' W. Lake Michi- 86°43.1'W. Lake Michi- 86°43.1'W. Lake Michi- 86°32'00"w. Lake 86o37'00"W. Lake 86°43'00"W. Lake 87°06,30"W. Lake 87°18*30"w. Lake 87o27'00"W. Lake 86°14'50"W. Lake 86°18,25"W. Lake 233 1212 Vertical #20 net haul. Station C-3. 42°49f10"N; 86°28,25"W. Lake Michigan. Coll: J. Ayers. 26 Sept. 1966 (Extremely sparse phyto- plankton) . 1213 Vertical #20 net haul. Station C-4. 42°48'50"N; 86o41'30"W. Lake Michigan. Coll: J. Ayers. 28 Sept. 1966. 1214 Vertical #20 net haul. Station C-5. 42°49»00"N; 86°50,00"W. Lake Michigan. Coll: J. Ayers. 28 Sept. 1966. 1215 Vertical #20 net haul. Station C-6. 42°47'40"N; 87°26'50"W. Lake Michigan. Coll: J. Ayers. 28 Sept. 1966. 1216 Vertical #20 net haul. Station C-7. 42°47'30"N; 87°34,30"W. Lake Michigan. Coll: J. Ayers. 28 Sept. 1966. 1217 Vertical #20 net haul. Station E-l. 44°37,30"N; 86°18'12"W. Lake Michigan. Coll: J. Ayers. 2 Oct. 1966. 1218 Vertical #20 net haul. Station E-2. 44°37f00"N; 86°21*42"W. Lake Michigan. Coll: J. Ayers. 2 Oct. 1966. 1219 Vertical #20 net haul. Station E-3. 44o34'00"N; 86o40'00"W. Lake Michigan. Coll: J. Ayers. 2 Oct. 1966. 1220 Vertical #20 net haul. Station E-4. 44°30'18"N; 86°55*18"W. Lake Michigan. Coll: J. Ayers. 2 Oct. 1966. 1221 Vertical #20 net haul. Station #-5. 44°25'30"N; 87o10'18"W. Lake Michigan. Coll: J. Ayers. 1 Oct. 1966. 1222 Vertical #20 net haul. Station E-6. 44°27I48"N; 87026'25"W. Lake Michigan. Coll: J. Ayers. 1 Oct. 1966. 1223 #20 net sample, vertical haul, 83 m., Station B-3. 42°24'00"N; 86°35'30"W. Coll: C. F. Powers. 18 May 1964. 26 spp. 63995 spec. H=0.848 R=0.740 1224 #20 net sample, vertical haul, 141 m. , Station B-4. 42°23'30"N; 87°01'30"W. Coll: C. F. Powers. 18 May 1964. 33 spp. 51005 spec. H=0.721 R=0.794 1225 #20 net sample, vertical haul, Station C-6. 42°47'40"N; 87°26'50"W. Coll: C. F. Powers. 15 May 1964. 40 spp. 25510 spec. H=1.368 R=0.629 1226 #20 net sample, vertical haul, Station C-7. 42°47'30"N; 87°34'30"W. Coll: C. F. Powers. 16 May 1964. 42 spp. 26280 spec. H=1.520 R=0.593 1227 #20 net sample, vertical haul, Station C^r-2. 43o12'00"N; 86°31'00"W. Coll: C. F. Powers. 13 May 1964. 40 spp. 91190 spec. H=1.264 R=0.657 234 1228 #20 net sample, vertical haul, Station D-2. 43°56*00MN; 86o39'30"W. Coll: C. F. Powers. 14 May 1964. 46 spp. 51379 spec. H=1.243 R=0.675 1229 #20 net sample, vertical haul, Station D-5. 43°38'40"N; 87°31,00"W. Coll: C. F. Powers. 14 May 1964. 52 spp. 47291 spec. H=1.638 R=0.585 1230a #20 net sample, vertical haul, Station E-2. 44°37,00"N; 86°21'42"W. Coll: C. F. Powers. 16 May 1964. 50 spp. 33745 spec. H=1.416 R=0.638 1231 #20 net sample, vertical haul, Station E-3. 44°34'00"N; 86°40'00"W. Coll: C. F. Powers. 16 May 1964. 51 spp. 40884 spec. H-1.225 R=0.688 1232 #20 net sample, vertical haul, Station E-5. 44°25l30,tN; 87°10'18"W. Coll: C. F. Powers. 16 May 1964. 59 spp. 57498 spec. H=1.659 R=0.593 1233 #20 net sample, vertical haul, Station B-3. 42°24'00"N; 86o35*30"W. Coll: C. F. Powers. 5 June 1964. 37 spp. 41991 spec. H=1.673 R=0.537 1234a #20 net sample, vertical haul, Station B-3. 42°24'00"N; 86°35'30"W. Coll: C. F. Powers. 18 June 1964 „ 38 spp. 35568 spec. H=1.574 R=0.567 1235a #20 net sample, vertical haul, Station C-7. 42°47'30"N; 87o34*30"W. Coll: C. F. Powers. 16 June 1964. 35 spp. 35407 spec. H=1.446 R=0.593 1236 #20 net sample, vertical haul, Station, C'-l. 43°08'00"N; 86°23»00"W. Coll: C. F. Powers. 8 June 1964. 64 spp. 57132 spec. H=1.668 R=0.599 1237a #20 net sample, vertical haul, Station C-2. 43°12'00"N; 86°31'00"W. Coll: C. F. Powers. 8 June 1964. 49 spp. 38790 spec. H=1.674 R=0.570 1238 #20 net sample, vertical haul, Station D-3. 43°54'00"N; 86°51'30"W. Coll: C. F. Powers. 11 June 1964. 44 spp. 50000 spec. H=0.972 R=0.743 1239 #20 net sample, vertical haul, Station D-4. 43o48'00"N; 87°03'00"W. Coll: C. F. Powers. 11 June 1964. 39 spp. 86175 spec. H=1.240 R=0.661 1240 #20 net sample, vertical haul, Station D-6. 43°44,00"N; 87°38,00"W. Coll: C. F. Powers. 10 June 1964. 83 spp. 65191 spec. H=1.398 R=0.684 1241 #20 net sample, vertical haul, Station E-2. 44°37'00"N; 86°21'42"W. Coll: C. F. Powers. 13 June 1964. 56 spp. 67634 spec. H=1.418 R=0.648 235 1242 #20 net sample, vertical haul, Station E-3. 44°34'00"N; 86°40,00"W. Coll: C. F. Powers. 13 June 1964. 44 spp. 66726 spec. H=0.629 R=0.834 1243 #20 net sample, vertical haul, Station E-6. 44°27'48"N; 87°26'25"W. Coll: C. F. Powers. 13 June 1964. 78 spp. 47892 spec. H=1.655 R=0.620 1244 #20 net sample, vertical haul, Station F-l. 45°21,45"N; 85019f45"W. Coll: C. F. Powers. 11 June 1964. 89 spp. 91203 spec. H=1.500 R=0.666 1245a #20 net sample, vertical haul, Station F-2. 45o28'30"N; 85°26'00"W. Coll: C. F. Powers. 11 June 1964 68 spp. 28922 spec. H=1.490 R=0.647 1246a #20 net sample, vertical haul, Station F-3. 45°33f40,,N; SS^O^'W. Coll: C. F. Powers. 11 June 1964. 54 spp. 16733 spec. H=1.554 R=0.610 1247a #20 net sample, vertical haul, Station B-3. 42°24'00"N; Se^'SCW. Coll: C. F. Powers. 14 July 1964. 28 spp. 23427 spec. H=1.572 R=0.528 1248 #20 net sample, vertical haul, Station B-3. 42°24f00"N; 86°35,30"W. Coll: C. F. Powers. 24 July 1964. 34 spp. 50748 spec. H=1.626 R=0.539 1249 #20 net sample, vertical haul, Station C-3. 42o49'10nN; 86028'25"W. Coll: C. F. Powers. 8 July 1964. 27 spp. 36820 spec. H=1.520 R=0.539 1250a #20 net sample, vertical haul, Station C-6. 42°47'40"N; 87°26'50"W. Coll: C. F. Powers. 10 July 1964. 42 spp. 24325 spec. H=1.838 R=0.508 1251 #20 net sample, vertical haul, Station C-7. 42°47,30"N; 87o34'30"W. Coll: C. F. Powers. 16 July 1964. 37 spp. 34518 spec. H=1.422 R=0.606 1252 #20 net sample, vertical haul, Station C'-l. 43°08,00"N; 86°23*00"W. Coll: C. F. Powers. 16 July 1964. 55 spp. 35850 spec. H=1.682 R=0.580 1253 #20 net sample, vertical haul, Station C-2. 43°12'00"N; 86°31'00MW. Coll: C. F. Powers. 16 July 1964. 43 spp. 43816 spec. H=1.647 R=0.562 1254 #20 net sample, vertical haul, Station D-2. 43°56'00"N; 86°39'30"W. Coll: C. F. Powers. 15 July 1964. 56 spp. 52210 spec. H=1.722 R=0.572 1255 #20 net sample, vertical haul, Station D-5. 43°38'40"N; 87°31'00"W. Coll: C. F. Powers. 15 July 1964. 55 spp. 38962 spec. H=2.048 R=0.489 236 1256 #20 net sample, vertical haul, Station E-2. 44°37,00"N; 86°21'42"W. Coll: C. F. Powers. 14 July 1964. 73 spp. 54588 spec. H-1.533 R=0.638 1257 #20 net sample, vertical haul, Station E-3. 44°34'00"N; 86°40'00"W. Coll: C. F. Powers. 14 July 1964. 63 spp. 41795 spec. H=1.464 R=0.647 1258 #20 net sample, vertical haul, Station F-l. 45°21'45"N; 85°19'45"W. Coll: C. F. Powers. 6 July 1964. 117 spp. 42377 spec. H-1.984 R=0.583 1259 #20 net sample, vertical haul, Station F-2. 45°28'30"N; 85o26'00"W. Coll: C. F. Powers. 6 July 1964. 78 spp. 32272 spec. H=1.988 R=0.544 1260 #20 net sample, vertical haul, Station F-3. 45°33'40"N; 85°30'45"W. Coll: C. F. Powers. 6 July 1964. 89 spp. 52357 spec. H=2.012 R=0.552 1261 #20 net sample, vertical haul, Station B-3. 42°24,00"N; 86°35'30"W. Coll: C. F. Powers. 2 August 1964. 31 spp. 50956 spec. H=1.278 R=0.628 1262 #20 net sample, vertical haul, Station B-3. 42°24T00"N; 86°35'30"W. Coll: C. F. Powers. 17 August 1964. 31 spp. 47620 spec. H=1.254 R=0.635 1263 #20 net sample, vertical haul, Station C-7. 42°47T30"N; 87°34*30"W. Coll: C. F. Powers. 15 August 1964. 20 spp. 24980 spec. H=1.214 R=0.595 1264 #20 net sample, vertical haul, Station C'-l. 43o08'00"N; 86°23*00"W. Coll: C. F. Powers. 10 August 1964. 74 spp. 51792 spec. H=1.705 R=0.604 1265 #20 net sample, vertical haul, Station C-2. 43o12'00"N; 86°31'00"W. Coll: C. F. Powers. 10 August 1964. 52 spp. 44733 spec. H=1.571 R=0.602 1266 #20 net sample, vertical haul, Station D-3. 43°54'00"N; 86°51,30"W. Coll: C. F. Powers. 18 August 1964. 44 spp. 28508 spec. H-2.259 R=0.403 1267 #20 net sample, vertical haul, Station D-6. 43°44'00"N; 87°38'00"W. Coll: C. F. Powers. 18 August 1964. 38 spp. 46260 spec. H=1.289 R=0.646 1268 #20 net sample, vertical haul, Station E-2. 44°37'00"N; 86°21*42"W. Coll: C. F. Powers. 15 August 1964. 82 spp. 36556 spec. H=2.081 R=0.528 1269 #20 net sample, vertical haul, Station E-3. 44°34'00"N; 86o40'00"W. Coll: C. F. Powers. 15 August 1964. 50 spp. 36486 spec. H=2.007 R=0.487 237 1270 #20 net sample, vertical haul, Station F-l. 45°21'45"N; 85°19,45"W. Coll: C. F. Powers. 10 August 1964. 84 spp. 36725 spec. H=1.817 R=0.590 1271a #20 net sample, vertical haul, Station C-7. 42°47'30"N; 87°34,30"W. Coll: C. F. Powers. 22 Sept. 1964. 39 spp. 15317 spec. H=0.984 R=0.731 1272 #20 net sample, vertical haul, Station C'-l. 43°08*00"N; 86°23,00"W. Coll: C. F. Powers. 10 Sept. 1964. 57 spp. 24363 spec. H=1.732 R=0.572 1273a #20 net sample, vertical haul, Station C'-2. 43°12'00"N; 86°31'00"W. Coll: C. F. Powers. 10 Sept. 1964. 39 spp. 18599 spec. HKL.703 R=0.535 1274a #20 net sample, vertical haul, Station D-l. 43o57*00"N; 86°33'00"W. Coll: C. F. Powers. 17 Sept. 1964. 49 spp. 21313 spec. H=1.700 R=0.563 1275 #20 net sample, vertical haul, Station D-2. 43°56'00"N; 86°39,30"W. Coll: C. F. Powers. 17 Sept. 1964. 52 spp. 15501 spec. H=1.770 R=0.552 1276a #20 net sample, vertical haul, Station D-3. 43°54'00"N; 86°51'30"W. Coll: C. F. Powers. 18 Sept. 1964. 28 spp. 8948 spec. H=1.860 R=0.442 1277 #20 net sample, vertical haul, Station D-4. 43°48»00"N; 87°03'00"W. Coll: C. F. Powers. 18 Sept. 1964. 29 spp. 16138 spec. H=1.446 R=0.571 1278a #20 net sample, vertical haul, Station D-6. 43°44'00"N; 87o38'00"W. Coll: C. F. Powers. 18 Sept. 1964. 44 spp. 26019 spec. H=1.388 R=0.633 1279a #20 net sample, vertical haul, Station E-l. 44o37'30"N; 86°18'12"W. Coll: C. F. Powers. 16 Sept. 1964. 109 spp. 25467 spec. H=1.832 R=0.610 1280a #20 net sample, vertical haul, Station E-2. 44°37,00"N; 86°21'42"W. Coll: C. F. Powers. 16 Sept. 1964. 42 spp. 14689 spec. H=1.558 R=0.583 1281a #20 net sample, vertical haul, Station E-3. 44°34'00"N; 86°40,00"W. Coll: C. F. Powers. 16 Sept. 1964. 40 spp. 25483 spec. H=1.951 R=0.471 1282 #20 net sample, vertical haul, Station E-4. 44o30'18,,N; 86°55'18"W. Coll: C. F. Powers. 16 Sept. 1964. 34 spp. 9025 spec. H=1.772 R=0.497 1283a #20 net sample, vertical haul, Station E-5. 44°25'30"N; 87°10'18"W. Coll: C. F. Powers. 16 Sept. 1964. 38 spp. 16314 spec. H=2',064 R=0.432 238 1284a 1285a 1286a 1287a 1288a 1289 1290a 1291a 1292a 1293a 1294a 1295 1296 1297a #20 net Coll: C. 77 #20 net Coll: C. 151 #20 net Coll: C. 44 #20 net Coll: C. 48 #20 net Coll: C. 35 #20 net Coll: C. 40 #20 net Coll: C. 32 #20 net Coll: C. 29 #20 net Coll: C. 30 #20 net Coll: C. 34 #20 net Coll: C. 37 #20 net Coll: C, 33 #20 net Coll: C. 31 #20 net Coll: C. 60 sample, vertical haul, Station E-6. 44°27'48"N; 87°26'25"W. , F. Powers. 17 Sept. 1964. spp. 31473 spec. H-1.900 R=0.563 sample, vertical haul, Station F-l. 45°21,45"N; 85°19'45"W. , F. Powers. "15 Sept. 1964. spp* 17171 spec. H=2.374 R=0.527 sample, vertical haul, Station F-2. 45°28,30"N; 85°26,00"W. . F. Powers. 15 Sept. 1964. spp. 9136 spec. H=1.864 R=0.507 sample, vertical haul, Station F-3. 45°33,40"N; 85°30'45"W. , F. Powers. 15 Sept. 1964. spp. 19984 spec. H=1.821 R=0.530 sample, vertical haul, Station B-3. 42°24'00"N; 86°35'30"W. , F. Powers. 15 Oct. 1964. spp. 45938 spec. H=1.406 R=0.605 sample, vertical haul. Station C-7. 42o47'30"N; 87°34'30"W. , F. Powers. 14 Oct. 1964. spp. 22741 spec. H-1,343 R=0.636 sample, vertical haul, Station C'-l. 43o08'00"N; 86°23'00"W. , F. Powers. 16 Oct. 1964. spp. 26385 spec. H-1.331 R=0.616 sample, vertical haul, Station C-2. 43°12'00"N; 86°31,00"W. F. Powers. 16 Oct. 1964. spp. 40878 spec. H=1.340 R=0.602 sample, vertical haul, Station D-l. 43°57'00"N; 86°33,00"W. F. Powers. 15 Oct. 1964. spp. 26832 spec. H=1.381 R=0.594 sample, vertical haul, Station D-2. 43o56'00"N; 86°39'30"W. F. Powers. 15 Oct. 1964. spp. 21202 spec. H=1.408 R=0.601 sample, vertical haul, Station D-3. 43°54'00"N; 86°51'30"W. F. Powers. 15 Oct. 1964. spp. 30337 spec. H=1.564 R=0.567 sample, vertical haul, Station D-4. 43°48'00"N; 87°03'00"W. F. Powers. 15 Oct. 1964. spp. 16818 spec. H=1.605 R=0.541 sample, vertical haul, Station D-5. 43°38,40"N; 87°31'00"W. F. Powers. 14 Oct. 1964. spp. 25417 spec. H=1.306 R=0.620 sample, vertical haul, Station D-6. 43°44'00"N; 87°38'00"W. F. Powers. 14 Oct. 1964. spp. 52522 spec. H=1.512 R=0.631 239 1298 #20 net sample, vertical haul, Station E-l. 44°37,30"N; 86°18'12"W. Coll: C. F. Powers. 12 Oct. 1964. 48 spp. 37136 spec. H=1.461 R=0.622 1299a #20 net sample, vertical haul, Station E-2. 44°37f00"N; 86°21,42"W. Coll: C. F. Powers. 12 Oct. 1964. 50 spp. 31830 spec. H=1.677 R=0.571 1300 #20 net sample, vertical haul, Station E-3. 44°34'00"N; 86°40'00"W. Coll: C. F. Powers. 13 Oct. 1964. 61 spp. 27935 spec. H=2.000 R=0.513 1301a #20 net sample, vertical haul, Station E-4. 44°30,18"N; 86°55'18"W. Coll: C. F. Powers. 13 Oct. 1964. 46 spp. 22646 spec. H=1.953 R=0.490 1302a #20 net sample, vertical haul, Station E-5. 44°25'30"N; 87°10'18,,W. Coll: C. F. Powers. 13 Oct. 1964. 61 spp. 24698 spec. H=2.049 R=0.502 1303 #20 net sample, vertical haul, Station E-6. 44°27,48"N; 87°26'25"W. Coll: C. F. Powers. 13 Oct. 1964. 54 spp. 17866 spec. H=2.097 R=0.474 1304a #20 net sample, vertical haul, Station F-l. 45°21*45"N; 85°19'45"W. Coll: C. F. Powers. 11 Oct. 1964. 83 spp. 40492 spec. H=1.038 R=0.765 1305a #20 net sample, vertical haul, Station F-2. 45°28'30"N; 85°26'00"w. Coll: C. F. Powers. 11 Oct. 1964. 74 spp. 57966 spec. H=0.870 R=0.798 1306a #20 net sample, vertical haul, Station F-3. 45°33'40"N; 85°30'45"W. Coll: C. F. Powers. 11 Oct. 1964. 56 spp. 36078 spec. H=0.998 R=0.752 1307 #20 net sample, vertical haul, Station B-6. 42°22»30"N; 87°30,00"W. Coll: C. F. Powers. Probably Nov. 1964. 39 spp. 27716 spec. H=1.493 R=0.593 1308a #20 net sample, vertical haul, Station C-7. 42°47'30"N; 87°34'30"W. Coll: C. F. Powers. 6 Nov. 1964. 42 spp. 32879 spec. H=1.366 R=0.635 1309a #20 net sample, vertical haul, Station C'-l. 43°08,00"N; 86°23'00"W. Coll: C. F. Powers. 10 Nov. 1964. 35 spp. 62192 spec. H=1.202 R=0.662 1310 #20 net sample, vertical haul, Station C-2. 43°12'00"N; 86°31'00"W. Coll: C. F. Powers. 10 Nov. 1964. 32 spp. 44100 spec. H=1.371 R=0.604 1311 #20 net sample, vertical haul, Station D-l. 43°57'00"N; 86°33'00"W. Coll: C. F. Powers. 8 Nov. 1964. 41 spp. 38762 spec. H=l„362 R=0.633 240 1312 #20 net sample, vertical haul, Station D-2. 43°56,00"N; 86o39'30"W. Coll: C. F. Powers. 8 Nov. 1964. 33 spp. 32215 spec. H=1.410 R=0.597 1313 #20 net sample, vertical haul, Station D-3. 43°54,00"N; 86°51'30"W. Coll: C. F. Powers. 9 Nov. 1964. 38 spp. 51800 spec. H=1.493 R=0.590 1314a #20 net sample, vertical haul, Station D-4. 43°48'00"N; 87o03*00"W. Coll: C. F. Powers. 9 Nov. 1964. 31 spp. 34833 spec. H=1.482 R=0.568 1315 #20 net sample, vertical haul, Station D-5. 43°38,40"N; 87°31,00"W. Coll: C. F. Powers. 9 Nov. 1964. 33 spp. 21980 spec. H=1.404 R=0.598 1316 #20 net sample, vertical haul, Station D-6. 43°44'00"N; 87°38'00"W. Coll: C. F. Powers. 9 Nov. 1964. 48 spp. 26472 spec. H=1.608 R=0.585 1317 #20 net sample, vertical haul, Station E-l. 44°37f30"N; 86°18'12"W. Coll: C. F. Powers. 6 Nov. 1964. 48 spp. 52228 spec. H=1.394 R=0.640 1318a #20 net sample, vertical haul, Station E-2. 44°37f00"N; 86°21'42"W. Coll: C. F. Powers. 7 Nov. 1964. 51 spp. 52563 spec. H=1.544 R=0.607 1319 #20 net sample, vertical haul, Station E-3. 44°34'00"N; 86°40t00"W. Coll: C. F. Powers. 7 Nov. 1964. 43 spp. 38193 spec. H=1.620 R=0.569 1320a #20 net sample, vertical haul, Station E-4. 44°30'18"N; 86°55'18"W. Coll: C. F. Powers. 7 Nov. 1964. 63 spp. 48350 spec. H=1.646 R=0.603 1321 #20 net sample, vertical haul, Station E-5. 44°25'30"N; 87°10'18"W. Coll: C. F. Powers. 7 Nov. 1964. 50 spp. 31326 spec. H=1.616 R=0.587 1322a #20 net sample, vertical haul, Station E-6. 44°27,48"N; 87026'25"W. Coll: C. F. Powers. 7 Nov. 1964. 57 spp. 30007 spec. H=1.674 R=0.586 1323a #20 net sample, vertical haul, Station F-l. 45°21'45"N; 85°19'45"W. Coll: C. F. Powers. 6 Nov. 1964. 56 spp. 71750 spec. H=1.152 R=0.714 1324 #20 net sample, vertical haul, Station F-2. 45°28'30"N; 85°26,00"W. Coll: C. F. Powers. 6 Nov. 1964. 49 spp. 42933 spec. H=1.192 R=0.694 1325a #20 net sample, vertical haul, Station F-3. 45°33'40"N; 85°30'45"W. Coll: C. F. Powers. 6 Nov. 1964. 33 spp. 39699 spec. H=1.346 R=0.615 1331 Plankton, #20 net vertical haul. Sta. MIL-ID. Milwaukee, Wisconsin. Coll: J. Ayers. 21 July 1965. 241 1332 Vertical #20 net haul. Sta. MHKE-16. Milwaukee, Wisconsin. Lk. Mich. Coll: J. Ayers. 23 July 1965. 1333 Oblique #20 net haul. Sta. MIL-KE. Milwaukee, Wisconsin. Lk. Mich. Coll: J. Ayers. 24 July 1965. 1334 Oblique #20 net haul. Sta. MIL-35. Milwaukee, Wisconsin. Lk. Mich. Coll: J. Ayers. 27 July 1965. 1335 #20 net oblique haul. Sta. MH-29. Milwaukee, Wisconsin. Lk. Mich. Coll: J. Ayers. 28 July 1965. 1336 Vertical #20 net haul. Sta. C-3. 42°49'10"N; 86°28'25"W. Lake Mich. Coll: C. F. Powers. 27 Jan. 1967. 41 spp. 51933 spec. HMO. 893 R=0.759 1337 Vertical #20 net haul. Sta. C-3. 42°49'10"N; 86°28'25"W. Lake Mich. Coll: C. F. Powers. 2 March 1967. 60 spp. 68039 spec. H=1.884 R=0.540 1338a Vertical #20 net haul. Sta. C-3. 42°49'10"N; 86°28'25"W. Lake Mich. Coll: C. F. Powers. 28 March 1967. 58 spp. 75628 spec. H=2.002 R=0.507 1339 Vertical #20 net haul. Sta. C-5. 42°49'00"N; 86°50'00"W. Lake Mich. Coll: C. F. Powers. 28 March 1967. 52 spp. 32074 spec. H=1.747 R=0.558 1340a Vertical #20 net haul. Sta. C-7. 42°47'30"N; 87°34,30"W. Lake Mich. Coll: C. F. Powers. 28 March 1967. 67 spp. 137519 spec. H=1.793 R=0.574 1341a Vertical #20 net haul. Sta. A-3-A. 42°05'30"N; 86°43'00"W. Lake Mich. Coll: E. Dunster. 19 April 1967. 102 spp. 92183 spec. H=1.700 R=0.632 1342 Vertical #20 net haul. Sta. A-4-A. 42°03'30"N; 87°06'30"W. Lake Mich. Coll: E. Dunster. 19 April 1967. 72 spp. 55413 spec. H=1.930 R=0.549 1343 Vertical #20 net haul. Sta. A-6-A. 41°52'00"N; 87°27'00"W. Lake Mich. Coll: E. Dunster. 19 April 1967. 77 spp. 143939 spec. H=1.409 R=0.676 1344a Vertical #20 net haul. Sta. C-3-E. 42°49'10"N; 86°28'25"W. Coll: E. Dunster. 25 April 1967. 48 spp. 60445 spec. H=1.324 R=0.658 Lake Mich. 1345a Vertical #20 net haul. Sta. C-5-E. 42°49'00"N; 86°50'00"W. Lake Mich. Coll: E. Dunster. 25 April 1967. 60 spp. 51303 spec. H=2.073 R=0.494 1346a Vertical #20 net haul. Sta. C-7-E. 42°47'30"N; 87°34'30"W. Lake Mich. Coll: E. Dunster. 21 April 1967. 76 spp. 74893 spec. H=1.471 R=0.660 242 1347a Vertical #20 net haul. Sta. E-2-E. 44°37,00"N; 86°21*40MW. Lake Mich. Coll: E. Dunster. 23 April 1967. 53 spp. 61505 spec. H=1.760 R=0.557 1348a Vertical #20 net haul. Sta. E-5-E. 44°25f30"N; 87o10'18"W. Lake Mich. Coll: E. Dunster. 23 April 1967. 72 spp. 72950 spec. H-1.758 R=0.589 1349 Vertical #20 net haul. Off Chicago— Pierhead, Illinois. CI: 41° 53. 3 'N; 87°35.4'W. Lake Mich. Coll: E. Dunster. 19 April 1967. 70 spp. 27838 spec. H-1.752 R=0.588 1350a Surface #20 net tow. Benton Harobr, Michigan. BH: 42°06.9'N; 86°29.7'W. Lake Mich. Coll: E. Dunster. 19 April 1967. 237 spp. 45401 spec. H=2.572 R=0.530 1351 Surface #20 net tow. Milwaukee entrance, Wisconsin. MI: 43°01,6'N; 87°52.9rW. Lake Mich. Coll: E. Dunster. 21 April 1967. 72 spp. 32225 spec. H=2.123 R=0.504 1352 Surface #20 net tow. 'Kewaunee Harbor entrance, Wisconsin KW: 44° 27. 5' N; 87°29.6'W. Lake Mich. Coll: E. Dunster. 21 April 1967. 80 spp. 11642 spec. H=2.635 R=0.399 1353 Surface #20 net tow. Frankfort off piers, Michigan. FR: 44037.8'N; 86°15.0'W. Lake Mich. Coll: E. Dunster. 23 April 1967. 49 spp. 9480 spec. H=1.876 R=0.518 1354 Surface #20 net tow. Outside, Grand Haven pierheads, Michigan. GH: 43°03.5*N; 86°15.4'W. Lake Mich. Coll: E. Dunster. 25 April 1967. 133 spp. 57942 spec. H=1.693 R=0.654 1355 Vertical #20 net tow. Sta. #1, off Grand Haven. 43°08.6'N; 86°19.6'W. Lake Mich. Coll: V. E. Noble. 28 April 1967. 1356 Vertical #20 net tow. Sta. #2, off Grand Haven. 43°08.6'N; 86°19.8,W. Lake Mich. Coll: V. E. Noble. 28 April 1967. 1357 Vertical #20 net tow. Sta. #3, off Grand Haven. 43°03.8'N; 86°20.0'W. Lake Mich. Coll: V. E. Noble. 28 April 1967. 1358 Vertical #20 net tow. Sta. #4, off Grand Haven. 43°03.8»N; 86°19.5'W. Lake Mich. Coll: V. E. Noble. 29 April 1967. 1359 Vertical #20 net tow. Sta. #5, off Grand Haven. 43°03.7'N; 86018.9fW. Lake Mich. Coll: V. E. Noble. 29 April 1967. 1360 Vertical #20 net tow. Sta. #6, off Grand Haven. 43°03.7'N; 86°15.9'W. Lake Mich. Coll: V. E. Noble. 29 April 1967. 1361 Vertical #20 net tow. Sta. #7, off Grand Haven. 43°01.9'N; 86°1606'W. Lake Mich. Coll: V. E. Noble. 30 April 1967. 1362 Vertical #20 net tow. Sta. #8, off Grand Haven. 43°02.1*N; 86°16.3*W. Lake Mich. Coll: V. E. Noble. 30 April 1967. 243 1363 Vertical #20 net tow. Sta. #9, off Grand Haven. 43°02.6'N; 86°16.0'W. Lake Mich. Coll: V. E. Noble. 30 April 1967. 1364 Vertical #20 net tow. Sta. #10, off Grand Haven. 43°02.6fN; 86°15.4'W. Lake Mich. Coll: V. E. Noble. 30 April 1967. 1365 Vertical #20 net tow. Sta. #11, off Grand Haven. 43°02.5'N; 86°18.0'W. Lake Mich. Coll: V. E. Noble. 30 April 1967. 1366 Vertical #20 net tow. Inside Grand Haven Piers -A, Mich. Lake Mich. Coll: V. E. Noble. 29 April 1967. 1367 Vertical #20 net tow. Inside Grand Haven Piers -B, Mich. Lake Mich. Coll: V. E. Noble. 29 April 1967. 1368a Vertical #20 net haul. Sta. A-3-E. 42°05,30"N; 86°43'00"W. Lake Mich. Coll: E. F. Stoermer. 4 May 1967. 48 spp. 31830 spec. H-1.731 R=0.553 1369 Vertical #20 net haul. Sta. A-4-E. 42°03'30MN; 87°06'30"W. Lake Mich. Coll: E. F. Stoermer. 4 May 1967. 46 spp. 26829 spec. H=1.103 R=0.712 1370 Vertical #20 net haul. Sta. A-6-E. 41o52'00"N; 87°27'00"W. Lake Mich. Coll: E. F. Stoermer. 3 May 1967. 53 spp. 43445 spec. H=1.349 R=0.660 1371a Vertical #20 net haul. Sta. C-3-E. 42°49'10"N; 86°28'25"W. Lake Mich. Coll: E. F. Stoermer. 4 May 1967. 40 spp. 43318 spec. H=1.236 R=0.665 1372a Vertical #20 net haul. Sta. C-5-E. 42°49'00MN; 86°50'00"W. Lake Mich. Coll: E. F. Stoermer. 5 May 1967. 45 spp. 28196 spec. H=1.458 R=0.617 1373 Vertical #20 net haul. Sta. C-7-E. 42°47f30"N; 87°34'30"W. Lake Mich. Coll: E. F. Stoermer. 5 May 1967. 40 spp. 35058 spec. H=1.011 R=0.726 1374 Vertical #20 net haul. Sta. E-2-E. 44°37'00"N; 86°21'42"W. Lake Mich. Coll: E. F. Stoermer. 7 May 1967. 59 spp. 33460 spec. H=1.676 R=0.589 1375a Vertical #20 net haul. Sta. E-3-E. 44o34'00"N; Se^OWW. Lake Mich. Coll: E. F. Stoermer. 7 May 1967. 57 spp. 41559 spec. H=1.418 R=0.649 1376 Vertical #20 net haul. Sta. E-5-E. 44°25'30"N; 87°10'18"W. Lake Mich. Coll: E. F. Stoermer. 6 May 1967. 55 spp. 35576 spec. H=1.764 R=0.560 1377a Vertical #20 net haul. Sta. GS-67-1. 44°46.9'N; 86°13.7'W. Lake Mich. Coll: E. F. Stoermer. 9 May 1967. 39 spp. 25265 spec. H=1.462 R=0.601 244 5.378 Vertical #20 net haul. Sta. GS-67-2. 45°00.6N; 85°56.5W. Lake Mich. Coll: E. F. Stoermer. 9 May 1967. 34 spp. 23781 spec. H-1.693 R=0.520 1379 Vertical #20 net haul. Sta. GS-67-3. 45°04.4N; 85°26.6W. Lake Mich. Coll: E. F. Stoermer. 9 May 1967. 54 spp. 32312 spec. H=1.748 R=0.562 1380a Vertical #20 net haul. Sta. GS-67-4. 45°25.2N; 85°19.0W. Lake Mich. Coll: E. F. Stoermer. 9 May 1967. 63 spp. 59470 spec. H-1.872 R=0.548 1381a Vertical #20 net haul. Sta. GS-67-5. 45°30.5N; 85°23.5W. Lake Mich. Coll: E. F. Stoermer. 10 May 1967. 55 spp. 41926 spec. H=1.783 R=0.555 1382 Vertical #20 net haul. Sta. GS-67-6. 45°33.0N; 85°34.5W. Lake Mich. Coll: E. F. Stoermer. 10 May 1967. 64 spp. 36026 spec. H=1.553 R=0.626 1383 Vertical #20 net haul. Sta. GS-67-7. 45°34.5N; 85°41.2W. Lake Mich. Coll: E. F. Stoermer. 10 May 1967. 61 spp. 37408 spec. H-1.855 R=0.549 1384 Vertical #20 net haul. Sta. GS-67-8. 45°44.7N; 85°46.5W. Lake Mich. Coll: E. F. Stoermer. 10 May 1967. 67 spp. 54095 spec. H=1.651 R=0.607 1385 Vertical #20 net haul. Sta. GS-67-9. 45°54.6N; 86°11.5W. Lake Mich. Coll: E. F. Stoermer. 10 May 1967. 50 spp. 42471 spec. H=1.660 R=0.576 1386 Vertical #20 net haul. Sta. GS-67-10. 45°34.0N; 86°25.7W. Lake Mich. Coll: E. F. Stoermer. 12 May 1967. 62 spp. 34810 spec. H=1.614 R=0.609 1387 Vertical #20 net haul. Sta. GS-67-11. 45°31.7N; 86°41.4W. Lake Mich. Coll: E. F. Stoermer. 12 May 1967. 106 spp. 26248 spec. H=2.075 R=0.555 1388 Vertical #20 net haul. Sta. GS-67-12. 45°47.1N; 86°36.1W. Lake Mich. Coll: E. F. Stoermer. 12 May 1967. 126 spp. 16575 spec. H=2.212 R=0.543 1389 Vertical #20 net haul. Sta. GS-67-13. 45°43.8N; 86°41.6W. Lake Mich. Coll: E. F. Stoermer. 12 May 1967. 103 spp. 38783 spec. H-1.644 R=0.645 1390 Vertical #20 net haul. Sta. GS-67-14. 45°40.5N; 86°48.8W. Lake Mich. Coll: E. F. Stoermer. 12 May 1967. 78 spp. 17030 spec. H=1.823 R=0.582 1391 Vertical #20 net haul. Sta. GS-67-15. 45°36.2N; 86°58.5 W. Lake Mich. Coll: E. F. Stoermer. 12 May 1967. 66 spp. 20883 spec. H=2.091 R=0.501 245 1392 Vertical #20 net haul. Sta. GS-67-16. 45°47.4N; 87°02.2W. Lake Mich. Coll: E. F. Stoermer. 12 May 1967. 93 spp. 32447 spec. H-2.114 R=0.534 1393 Vertical #20 net haul. Sta. GS-67-17. 45°34.0N; 87°09.0W. Lake Mich. Coll: E. F. Stoermer. 13 May 1967. 71 spp. 36504 spec. H=2.077 R=0.513 1394a Vertical #20 net haul. Sta. GS-67-18. 45°23.5N; 87°17.5W. Lake Mich. Coll: E. F. Stoermer. 13 May 1967. 108 spp. 58134 spec. H=1.955 R=0.583 1395 Vertical #20 net haul. Sta. GS-67-19. 45°05.0N; 87°32.3W. Lake. Mich. Coll: E. F. Stoermer. 13 May 1967. 82 spp. 85154 spec. H=1.423 R=0.677 1396 Vertical #20 net haul. Sta. GS-67-20. 44°40.2N; 87°52.8W. Lake Mich. Coll: E. F. Stoermer. 13 May 1967. 78 spp. 135155 spec. H=1.359 R=0.688 1397 Vertical #20 net haul. Sta. GS-67-21. 44°54.7N; 87°25,8W. Lake Mich. Coll: E. F. Stoermer. 13 May 1967. 70 spp. 152893 spec. H=1.296 R-0.695 1398 Vertical #20 net haul. Sta. GS-67-22. 44°46.6N; 87°17.4W. Lake Mich. Coll: E. F. Stoermer. 14 May 1967. 77 spp. 32937 spec. H=1.873 R=0.569 1399a Surface #20 net tow. Harbor entrance, Port Washington, Wisconsin. PW: 43°23.2,N; 87°51.7'W. Coll: E. F. Stoermer. 5 May 1967. 64 spp. 14704 spec. H=2.041 R=0.509 1400a Surface #20 net tow. Harbor entrance, Sheboygan, Wisconsin, Lake Mich. SB: 43°45.0'N; 87°41.5'W. Coll: E. F. Stoermer. 6 May 1967. 96 spp. 16788 spec. H=2.297 R=0.497 1401 Surface #20 net tow. Harbor entrance, Manitowoc, Wisconsin, Lake Mich. MO: 44°05.6'N; 87°38.6'W. Coll: E. F. Stoermer. 6 May 1967. 101 spp. 17008 spec. H=2.029 R=0.560 1402 Surface #20 net tow. Harbor entrance, Two Rivers, Wisconsin, Lake Mich, TR: 44°08.6»N; 87°33.6'W. Coll: E. F. Stoermer. 6 May 1967. 108 spp . 18468 spec. H=2.055 R=0.561 1403 Surface #20 net tow. Harbor entrance, Charlevoix, Michigan, Lake Mich. CA: 45°19.3'N; 85°15.9'W. Coll: E. F. Stoermer. 10 May 1967. 123 spp. 7653 spec. H=2.859 R=0.406 1404 Surface #20 net tow. Harbor entrance, Manistique, Michigan, Lake Mich. MQ: 45°56.7'N; 86°14.8'W. Coll: E. F. Stoermer. 10 May 1967. 163 spp. 7872 spec. H=2.327 R=0.543 1405 Surface #20 net tow. Harbor entrance, Escanaba, Michigan, Lake Mich. ES: 45°44.7'N; 87°02.2'W. Coll: E. F. Stoermer. 12 May 1967. 92 spp. 15504 spec. H=1.534 R=0.661 246 1406a Surface #20 net tow. Harbor entrance, Green Bay, Wisconsin, Lake Mich. GB: 44°39.2'N; 87°54.1'W. Coll: E. F. Stoermer. 13 May 1967. 75 spp. 37095 spec. H=Q.513 R=0.881 1407 Surface #20 net tow. Harbor entrance, Sturgeon Bay, Wisconsin, Lake Mich. SM: 44°47.5'N; 87°18.6'W. Coll: E. F. Stoermer. 14 May 1967. 116 spp. 16747 spec. H=2.393 R=0.497 1408a Vertical #20 net tow. Sta. A-3-E. 42°05,30"N; 86°43'00"W. Lake Mich. Coll: E. Dunster. 23 May 1967. 48 spp. 22363 spec. H=1.694 R=0.562 1409a Vertical #20 net tow. Sta. A-4-E. 42°03'30"N; 87°06,30'*W. Lake Mich. Coll: E. Dunster. 23 May 1967. 32 spp. . 33606 spec. H-1.553 R-0.556 1410a Vertical #20 net haul. Sta. A-6-E. 41°52,00"N; 87