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Those too large to be entirely included in one exposure are filmed beginning in the upper left hand corner, left to right and top to bottom, as many fromes as required. The following diagrams illustrate the method: Un dee symboles suivants apparaTtra sur ia dernidre image de cheque microfiche, selon le cas: le symbole — ► signifie "A SUiVRE ", le symbole y signifie "FIN". Les cartes, planches, tableaux, etc., peuvent dtre film^s d des taux de reduction diff^rents. Lorsque le document est trop grand pour dtre reproduit en un seui clich6, il est film6 d partir de Tangle supirieur gauche, de gauche d droite. et de haut en bau, en prenant le nombre d'images n^cessaire. Les diagrammes suivants illustrent la m^thode. ta ure. ] 1 2 3 1 2 3 4 5 6 ti>^ -^ -^v NOTES Regent Canadian Unionid^. By J. F. Whiteavbs. RtprinUd frot» the Canadian Record qf Science, Janudryi, 1895, Y 'Feprinted/rom the Canadian Record of Science, January, 1895." Notes on Recent Canadian Unionid^. By J, F. Whiteaves.1 The present paper is intended as a contribution to our knowledge of the geographical distribution of the Unionidfe in North America. It consists of a list of all the species from Canadian localities that are now repre- sented in the museum of the Geological Survey at Ottawa, and is based almost exchisively upon specimens that were either collected by members of the Survey staff or pre- sented by friends interested in its museum. So far as the writer is aware, however, the Unio tcnuissimiis of Lea, which was collected by Dr. G. M. Dawson in 1873, in the Souris Eiver, Manitoba, is the only species of Unionidie known to occur in Canada that is not represented in the Survey museum. Specimens of most of the nominal species of Anodonta and of a few of the more difficult species of Unio enumerated in this list have been kindly compared by Mr. Charles T. Simpson, of the United States National Museum, with Dr. Lea's types of North American Union- idse now preserved in that institution, and identified as correctly as the small number of shells sent from each locality and the incompleteness of his studies of the family would permit. The nomenclature employed throughout this list is that which is now in general use among students of this group in North America, as it is still quite uncertain which of the earlier names of Rafinesque, >■ Communicated by permission of tlie Director of tlie Geological Survey Depart- ment, 2 Canadian Record of Science. Lamarck and others, will ultimately have to be retained for some of these shells. ANODONTA, Lamarck, 1879. Akodonta Benedictii, Lea. Specimens which appear to have been identified with this species by Dr. Lea have already been recorded by Dr. K. BelP as having been collected by himself, in 1860, at Batch-ah-wah-nah Bay. Lake Superior ; in the St. Mary River, near Sugar Island, and on the north shore of Lake Huron, at Lacloche Island. Professor Macouu has recently (1894) collected it at Eondeau, near Point aux Pins, on the Ontario side of Lake Erie, and a few speci- mens, which Mr. Simpson thinks are probably referable to A. Benedictii, were collected by Dr. R Bell, in 1883, at Lake Winnipeg, between Fort Alexander and Elk Island. Mr. Simpson is inclined to believe that A. Benedictii may be only a variety of A. ovata, Lea. Anodonta decora. Lea. Eight full grown specimens and one immature shell of a very large Anodonta, which Mr. Simpson refers to A. decora, were collected by Mi. Law, of Chatham, at Ron- deau, Ontario, and presented by him to the Museum of the Survey, through Professor Macoun, in 1884. One of the adult shells from this locality, a fairly average specimen, measures 6.6 inches in length, 4 inches in height and 3.1 inches in breadth or thickness. The umbones of each are remarkably ventricose and pro- minent. The test is rather thick, the hinge line short, and the cardinal angles are rounded in front and obtusely angular behind. The writer has long been under the impression that these shells could be identified with the typical form of A. grandis, Say, as they do not correspond at all well with Lea's figures or measurements of A. decora, 1 IiiCaiiad. Nut. aiidGcol., Vol. VI.,p. 269. , Recent Canadian Unionida;. M retained fied with orded by , in 1860, St. Mary B of Lake 30UU has Point aux few speci- referable a 1883, at Ik Island. dicta may re shell of fers to A. 1, at Eon- Museum 884. One ly average inches in ness. The 1 and pro- line short, id obtusely under the id with the correspond if A. decora, the "breadth" or, as it would now be called, the length of which is stated to be 3.9 inches. The recent receipt from Mr. Simpson of outline drawings of specimens from Dr. Lea's collections, labelled " A. decora, from the canal at Cincinnati, Ohio," has, however, convinced the writer of the correctness of Mr. Simpson's determination, though it is very generally believed that A. decora is not more than a mere variety of A. grandis. Anodonta edentola. Say. {A. undidata, Lea, et auct, but possibly not of Say; A. Pennsykanica, Lamark, and A. areolata, Swainson.) Dr. K. Ellsworth Call has expressed the opinion that A. edentula, Say, is peculiar to the Mississippi drainage sys- tem, and A. undidata. Say., to those waters that dram into' the Atlantic, but the writer has never been able to see any tangible difference between these two shells. In a recent letter to the writer, Mr. Simpson says, " Anodonta undidata is no doubt the small form which we have here in the Potomac. Though Say gives no locality, he speaks of it as 'thin and fragile, length near half an inch; breadth seven-tenths.' The figure fairly well represents our shell. This may run into A. edentula, but I have never yet been able to connect it with that. The material in Lea's collec- tion, under the name of A. undulata. Say, is merely a form or forms of A. edentula." Under one or the other of these names this shell has previously been recorded as having been collected in Lake Matapedia, P.Q., by Dr. E. Bell in 1857 ; in a small . a^ in the valley of the Eiviere Eouge, P.Q., by W. b. A D'Urban, in 1858 ; in the St. Charles Eiver, near Quebec city, by the writer, in 1861, and at Brome Lake, P.Q.. by Mr. E. J. Fowler, in 1862. More recenUy, it has been collected by Dr. E. Bell in 1883, at Lake Winnipeg, between Forts Alexander and Sii-pson, and by Professor Macoun, in 1894, in Ontario, 4^ Canoffian Record of Scmice. at Rondeau, on Lake Erie, and in the east and west branches of the Grand Kiver at Gait and Ayr. In another letter to the writer, Mr. Simpson makes the following remarks upon this species, " The so-called Anodontas of which this is the type, have more or less perfect cardinals and occasional vestiges of laterals. They group with Margaritana Elliotti, M. Spillmnni, M. Eavene- liana, etc. The genus Margaritana is a medley of forms, which, for the most part, are more nearly related to various groups of Unio than to each other. I believe that Margaritana should be merged into Unio, and with it the Anodontas of the edentula group." Anodonta Ferussaciana, Lea. L'Orignal Creek, Ottawa River, Dr. R. Bell, 1855 (as A. pavonia, Lea). Ponds at the Mile End, Montreal, Dr. R, Bell, 1858, and J. F. Whiteaves, 1862. Anodonta fluviatilis, Dillwyn. Sp. (A. cataracta, Say.) Several specimens of this common eastern species, which has previously been recorded as occurring at many localities in the Province of Quebec and neighbourhood of Ottawa, were collected by Dr. R. Bell, in 1883, at Flying Post Route, 100 miles north-east of Michipicoten, and, in 1889, from a small lake near Proudfoot's north and south line, in the Sudbury district of Ontario. A single speci- men, which may be referable to this species, was collected by Professor Macoun, in 1884, at White Fish River, north of Lake Superior. Anodonta Footiana, Lea. Specimens which are said to have been identified with this species by Dr. Lea were collected by Mr. W. M. S. D'Urban, in 1858, from three small lakes tributary to the Riviere Rouge, P.Q. Since then, specimens, which Mr. Simpson refei-s to A. Footiana, have been collected in Recent Canadian Unianidce. * Ontario, by Professor Macoun, in 1884, at White Fish Kiver, north of Lake Superior, and at Lake Hannah, on the Nepigon Eiver; by Dr. A. C Lawson, in 1886, at Rainy Lake ; by Mr. W. Spreadborougli, in 1894, from the Muskoka lliver, near Georgian Bay ; and in Mani- toba, by Dr. 11. Bell, in 1883, at Shoal Lake, lied liiver. Mr. Simpson also is of opinion that specimens collected by Mr. R J. Fowler in the Lachine Canal at Montreal, in 1863, and referred by the writer to A. Leirisii, Lea, are young shells of A. Fobtiana. Anodonta fbagilis, Lamark. {A. lacustris, Lea.) This shell was apparently first collected in Canada by Mr. D'Urban in 1858, associated with A. Footiana, in three small lakes in the valley of the Riviere Rouge, and identified shortly afterwards by the late Dr. Isaac Lea with the A.frmjilis of Lamarck. Specimens collected by Professor Macoun in 1885, from a lake six miles up the Becscie River, Anticosti, were identified with A. fragilis by Mr. F. R. Latchford, of Ottawa, and similar shells have long been known to occur at Meach's Lake, near Ottawa. Some of these Anticosti specimens were sent to Mr. Simpson, who thinks that they are essentially similar to shells labelled A. fragilis in Dr. Lea's collection, but cannot see how these latter are to be distinguished from A. luctistris, Lea, and does not pretend to be always able to separate A. fragilis from A. fluviatilis. Anodonta implicata, Say. Lake Winnipeg, between Fort Alexander and Elk Island, Dr. R. Bell, 1883 ; and Souria River, near Roche Perc^e, Dr. A. R. C. Selwyn, 1890 ; a few specimens from each of these localities, which have been identified with this species by Mr. Simpson. It had previously been recorded as occurring in the St. Charles River, near Quebec, where it was collected by the writer in 1861. 0 Canadian Record of Science. Anodonta Marryattana, Lea. Lake Hannah, Nipigon River, and east side of Lake Nipigon, Ontario, Professor Macoun, 1884; and Fairford River, Manitoba, J. F. Whiteaves, 1888 ; as identified by Mr. Simpson. Anodonta Nuttalliana, Lea. (A. Oregonensis, Lea.) Okanagan Lake, B.C., A. J. Hill, 1882; two specimens of the variety Oregonensis. Near Victoria, V. L, James Fletcher, 1885, and Rev. G. W. Taylor, 1889. Nicola Lake, B.C., Dr. G. M. Dawson, 1889 ; three specimens of the typical form and one of the variety Oregonemis. Salmon Arm, Shuswap Lake, B.C., Dr. Dawson, 1894; several examples of both forms of the species. Stream entering Clayoquot Sound, V. I., at Stubbs Island, W. Spreadborough, 1894. Anodonta ovata, Lea. Coulee No. 5, Vermilion River, Alberta, J. B. Tyrrell, 1886. Anodonta Pepiniana, Lea. Specimens which Mr. Simpson refers to this species were collected by Dr. R. Bell, in 1883, from the Winnipeg River, Manitoba, and in 1886, from the Attawapishkat River, in the Severn district, which now forms the eastern part of Keewatin. Two left valves of a shell which may be referable to this species were collected by Mr. J. B. Tyrrell, in 1884, at the Lake of the Woods. Mr. Simpson is of the opinion that A. Pepiniana may be merely a variety of A. Simpsoniana, Lea. Anodonta Simpsoniana, Lea. In Ontario this species was collected by Dr. A. R. C. Selwyn in 1883, at Black Bay, Lake Superior ; by Prof. Macoun, in 1884, at the north end of Lake Nipigon, in Beeeiit Canadian Unionida: 1885, al Port Dover, Lake Erie, and in 1890, at Port Col- borne, on the same lake. In Manitoba it was collected by iJr. R. Bell in 1878, at the outlet of Lake Winnipeg and from Lake Winnipeg between Fort Alexander and Elk Island. It occurs, asso- ciated with A. Marri/attana, I.ea, in the Fairford Kiver, and is the only species of Anodonta that the writer was able to find in Lake Manitoba (in 1888). In the district of Sa,skatchewan one perfect specimen was collected by Dr. R Bell, in 1882, at Buffalo Lake, near Methy Portage. Mr. Simpson, to whom the writer is indebted for the identification of specimens from most of these localities, is convinced that A. Dallasiana and A. Kennicutti, of Lea, are both synonyms of A. Simpsoniana. Anodonta subcylindbacea. Lea. Widely distributed in the provinces of Quebec and Ontario, from Lakes Metapedia and St. John to the east- ward, to creeks, rivers and bays at the east end of Lake Superior and north side of Lake Erie to the westward. Mr. Simpson, however, regards A. subcylindracea as a niere synonym of A. ' Ferussaciana, Lea. MARGARITANA, Schumacher, 1819. Margakitana calceola, Lea. {M. deltoidea. Lea.) Lake Erie, at Fort Dover, Professor Macoun, 1890. Grand River, at Belwood, Ontario, J. Townsend, 1892. East and west branches of the Grand River at Gait and Ayr, Professor Macoun, 1894. Margakitana complanata, Barnes. Manitoba. Upper Assiniboine River, Dr. R. Bell, 1874 ; Souris River, Dr. A. R. C. Selwyn, 1882 and 1884; Shoal River and near Elk Island, Lake Winnipeg, Dr. R. Bell, 8 Canadian Record of Science. 1883 ; Swan Kiver, J. B. Tyrrell, 1887, and Assiniboine Kiver. J. B. Tyrrell, 1884. Kcewatin. Nelson River, Dr. R Bell, 1878. Saskatchewan. Shell River (township 50, range 2 and 3, west of third Initial Meridian) north of the north Sas- katchewan, 0. J. Klotz, 1890. Alberta. Battle River, three miles above Grattan Lake, J. B. Tyrrell, 1885. Margaritana margaritifera, L. From the Province of Quebec this species has already been recorded as having been collected by Dr. R. Bell (in 1857) in the Green and Rimouski rivers, at Lake St. John and both the Metapedia Lakes, and by the writer, (in 1861) in the River St. Charles, near Quebec City. More recently it has been collected in that province by Dr. H. M. Ami, in 1883, in the Assumption River, near Raw- don ; by N. .1. Giroux, in 1892, at the Lac de la Ferme, Riviere du Loup, en haut, and in that river; also by A. P. Low, in 1894, in the Romaine River. In British Columbia, small and thin but characteristic specimens were found by Dr. G. M. Dawson, in 1885, in small streams entering Malaspina Strait, on the mainland side ; also, in 1890, in Kakwous Lake, the source of the Bonaparte River, at an altitude of about 4,000 feet. Margaritana marginata. Say. The small and typical eastern form of this shell is common in the province of Quebec and in eastern Ontario. A few specimens of the large western variety known to students of the Unionidte as M. truncata, Say (M. S.) were collected by Professor Macoun, in 1894, at Gait and Ayr, from the east and west branches of the Grand River. Margaritana rugosa, Barnes. (? = !/. costata, Rafin- esque, sp.) This species is widely distributed in the provinces of f I I f I I I Recent Canadian Unionidce. 9 Quebec and Ontario. In the latter province unusually large and thick specimens, measuring five inches and a half in length by three inches in height, were collected by Prof. Macoun, in 1^94, iu the east and west branches of the Grand liiver, at Gait and Ayr. The species has been recorded by Dr. G. M. Dawson as occurring, though rarely, in the Koseau Kiver, Manitoba. Mahgauitana undulata, Say. St. Lawrence River, at Montreal and Quebec, J. F. Whiteaves, 1861. Near Ottawa City, G. C. Heron, 1879. UNIO, Philipsson, 1788. Unio alatus, Say. Widely distributed througliout Ontario. The most easterly locality at which it has been collected is the Ottawa liiver at L'Orignal, as recorded by Dr. It. Bell, in the Canadian Naturalist and Geologist for June, 1859 (Vol. IV., p. 219). In Manitoba it has been collected in the Red River by Dr. G. M. Dawson, in 1873, and by T. C. Weston, in 1884. Unio borealis, A. F. Gray. A pair of specimens of this species, from the Ottawa River, at Duck Island, the typical locality, was presented to the museum of the Survey by Mr. F. R. Latchford, of Ottawa, in 1886. Unio Canadensis, Lea. Two specimens, from the Ottawa River, near Ottawa, which are believed by the donor to be referable to this enigmatical species, were presented to the Museum of the Survey by Mr. Latchford, in 1893. Unio circulus, Lea. (1=U. suhrotunclus, Rafinesque.) Lake Erie, at Kingsville, Ontario, J. McQueen, 1880, iiiiMnirili lyif r^™"i'"'^-' 10 Canadian Record of Science. two specimens. Thames Kiver, at Chatham (several spe- cimens) and Detroit River, below Sandwich, Ontario (one specimen),Professor Macoun, 1894. Unio coccinkus, Lea. Grand River, Cayuga, Ontario, Professor Macoun : " fairly typical specimen," (C. T. Simpson). one Unio complanatus (Solander ?) Lea. ( U. pitrpureus, Say.) Abundant in Nova Scotia, New Brunswick, Quebec and Eastern Ontario. Collected by Dr. R. Bell, in 1859, in creeks, rivers and bays on the north shore at the east end of Lake Superior, along the entire north shore of Lake Huron, also in the St. Mary River. Lake Nipissing, Dr. A. R. C. Selwyn, 1884 (whence it had previously been recorded by Dr. Bell, in 1859). Montreal River, Lake Temiscaming, Ontario, Dr. R. Bell, 1887. Unio cornutus, Barnes. (?= U. reflexus, Rafinesque.) Grand River, Cayuga, Ontario, Professor Macoun, 1890 ; a perfect and fresh left valve. Unio elegans, I^a. ( U. truncatus, as of Rafinesque.) Thames River, at Chatham (Ontario), Professor Macoun, 1894 ; one dead but perfect specimen. Unio ellipsis. Lea. (? = U. olivarius, Rafinesque.) Ottawa River, opposite L'Orignal, R. Bell, 1854, and near Ottawa, G. C. Heron, 1879 (as U. olivarius, Rafin- esque). St. Lawrence River, at Montreal, R. Bell, 1858, and near Quebec, J. F. Whiteaves, 1861. Missisaugi River, on the north shore of Lake Huron, Dr. R. Bell, 1860. Lake Erie, at Port Colborne, and Detroit River, near Windsor, Professor Macoun, 1885. Unio gibbosus, Barnes. (?= U. dilatatus,BsiMeaq\xe.) This species, which has long been known to be abundant \i iS ij Mtt/t^iiaiMmi' ■ ^:?y3* :■ r ,-a^g^fi(63*3;it»-*v^s^^-*r'«Kr^yVJ^ - iiV ^< Canadian Unionidw. 11 spe- (one one 5a.y.) ebec 9, in id of iron, cv. C. dby 890; ;oun, and iafin- L858, mugi Bell, liver, ) idant i\ in the St. Lawi oJ and Ottawa rivers, has recently been collected by Professor Macoun in Lake Erie, at Tort Colborne, in the Grand Eiver at Cayuga, and its two branches at Gait and Ayr, also in the Detroit lliver, at Windsor. XJnio gracilis, Barnes. (? = U. fragilis, Kafinesque.) Collected by Professor Macoun, in 1885, from Lake Erie, at Port Colborne, and the Grand River, at Cayuga; in 1890, at Port Dover, Ontario, and in 1894, in the Eiver Thames, at Chatham. Unio lachrymosus. Lea. (Probably = U. quadruliis, Ea- finesque.) In Ontario, Professor Macoun collected specimens of this species in the Grand Eiver at Cayuga, in 1885, and in the Thames Eiver, at Chatham, in 1894. In Manitoba it was found to be abundant in the Eed Eiver, by Dr. G. M. Dawson, in 1873, and Professor J. Fowler has presented to the museum of the Survey a specimen, which he collected at Emerson in 1887. Unio ligamkntinus, Lamarck. Grand Eiver, at Caledonia, Ontario, J. Townsend, 1885, and at Cayuga, Professor Macoun, 1890. Thames Eiver, at Chatham, Professor Macoun, 1894. Eoseau Eiver. Manitoba, Dr. G. M. Dawson, 1873, and Assiniboine River, at Mil'wood, J. B. Tyrrell, 1888. Unio luteolds, Lamarck. Common almost everywhere in Canada east of the Eocky Mountains, though its exact range east of Ontario is a little uncertain, owing to its close resemblance to U. radiatus. Dr. Lea, in 1862, records it as occurring in Great Slave Lake, Lake Athabasca, and near the mouth of Moose Eiver, Hudson's Bay. In Manitoba it was col- lected by Mr. J. B. Tyrrell, in 1887, from the Swan Eiver ; 12 Canadian Record of Science. in 1888, from the Assiniboine, and in 1889, from the Eed Deer River. It appears to be the only Unio in Lake Manitoba, where it was collected by the writer in 1888, and from the Fairford River. In Alberta, Mr. Tyrrell collected it, in 1885, in the Blind Man, Battle and Medicine Rivers. Unio nasutus. Say. Two fine specimens of this species, from Toronto Bay, were presented to the museum of the Survey, by Mr. Latchford, in 1886, and since then numerous specimens of it were obtained by Professor Macoun (in 1894) at Ron- deau, on Lake Erie. Unio Novi-Eboraci, Lea. (Perhaps = U. iris, Lea.) Grand River, at Cayuga, Professor Macoun, 1890 ; one perfect specimen. Thames River, at Chatham (two speci- mens) and Detroit River, below Sandwich (one specimen), Professor Macoun, 1894. Unio phaseolus, Hildreth. {1=11. fasciolaris, Rafinesque.) Detroit River, at Windsor (one specimen) and Lake Erie, at Port Colborne (two specimens), Professor Macoun, 1885. Lake Erie, at Kingsville, Ontario (one specimen), J. T. McQueen, 1890, and Thames River, at Chatham (one specimen). Professor Macoun, 1894. Unio pressus, Lea. Boulder River, one of the upper branches of the Alta- wapishkat River, west of James Bay (in lat. 52° 30' and long. 87° 30'), Dr. R. Bell, 1886 ; a perfect and fresh right valve. West branch of the Grand River, at Ayr, Ontario, Professor Macoun, 1894, a slightly distorted but living shell This species has long been known to be common in the Rideau Canal and river, near Ottawa, where it was first noticed by the late E. Billings, about the year 1856 or 1857. • t o Recent Canadian Unionidce. 13 ' ) Unio pustulosus, Lea. (?= f/i bidlatits, Reflnesque.) Grand River, Caledonia, Ontario, J. Townsend, 1885 ; one specimen. Thames River, at Chatham, Professor Macoun, 1894 ; two specimens. Unio radiatus (Gmelin), Lamarck. No new localities are to be recorded for this common eastern species, which has long been known to range from Nova Scotia to at least as far to the westward as Ottawa. Unio Rangianus, Lea. (Perhaps a var. of U. perplexiis, Lea.) Lake Erie, at Kingsville, Ontario, J. T. McQueen, 1890 ; one perfect specimen of the shell of the female. Unio rectus, Lamarck. Common in the St. Lawrence and Ottawa rivers, and in western Ontario. In Manitoba, it was collected by Dr. G. M. Dawson, in 1873, from the Roseau River, and by Mr. J. B. Tyrrell, in 1888, in the Assiniboine River at Millwood. Unio RUBIGINOSUS, Lea. (^ = U. Jtavus, 'RaHnesqwe.) In Ontario this shell has been collected by Professor Macoun, in 1890, in the Grand River at Cayuga, and in 1894, in the Thames River, at Chatham. In Manitoba, it was found by Dr. G. M. Dawson, in 1873, in the Red and Roseau Rivers, and by Dr. R. Bell, in 1883, in Lake Win- nipeg, between Fort Alexander and Elk Island. Unio subrotundus. Lea. Grand River, Caledonia, J. Townsend, 1885, one speci- men, which "approaches U. ehenm" (C. T. Simpson). Port Dover, I^ike Erie, a specimen "which approaches U. solidiis, Lea," (C. T. Simpson), and Rondeau, Lake Erie, one specimen, Professor Macoun, 1894. • 14 Canadian Record of Science. Unio triangularis, Barnes. (? = ?7. triqueter, Eafinesque.) Collected by Piofessor Macoun, in 1885, at Port Col- borne, Ontario, and in 1894, at Eondeau and in the Thames Eiver at Chatham. Unio trigonus. Lea, (? = U. ttndatm, Barnes.) Port Dover, Lake Erie, Professor Macoun, 1890, two perfect but worn specimens, which were identified with this species by Mr. Simpson. Unio undulatus, Barnes. (?= CT". costatm, Eafinesque.) Ontario. Sable Eiver, at Thedford, Mr. Bissell, 1883, per Dr. H. Ami. Grand Eiver, Caledonia, J. Townsend, 1885. Lake Erie, at Port Colborne, and Detroit Eiver, at Windsor, Profeeisor Macoun, 1885. Grand Eiver, at Cayuga, Professor Macoun, 1890, and Thames Eiver, at Chatham, Professor Macoun, 1894. Manitoba. Black Eiver, Lake Winnipeg, Dr. E. Bell, 1883, two specimens, with the umbonal regions much eroded. Emerson, Professor J. Fowler, one specimen of a small form which approaches U-iilicatus (Le Sueur, MS.S.) Say. Unio ventricosus, Barnes. ( U. occidens, Lea, female, and U. suhovatus, Lea, male : ? = Z7. cardium, Eafinesque.) Common in the St. Lawrence and Ottawa rivers and throughout Ontario. In Manitoba it has been collected in the Eed and Eoseau Eivers by Dr. G. M. Dawson, in 1873, and at Lake Winnipeg, between Fort Alexander and Elk Island, by Dr. E. Bell, in 1883. Ottawa, November 30th, 1894. lue.) Col- the two with e.) L883, send, liver, sr, at jr, at Bell, nuch L of a [S.S.) !, and ue.) t and ected 3n, in r and "Reprinted from the Canadian Record of Science, April, 1895.' Additional notes on Recent Canadian UNIONIDiE. By J. F. Whiteaves. Unio Canadensis, Lea. In a letter to the writer, dated June 18th, 1895, Mr- Simpson says, " I think there can be little doubt, fronii examining the type of U. Canadensis, that it is a some- what injured specimen of the male of U. ventricosus,. Barnes. Mr. Bryant Walker, of Detroit, informs the writer that he has, in his cabinet, specimens of each of the following species, from the Detroit Eiver : Margabitana Hildbethiana, Lea. Main channel of the Detroit Eiver off Belle Isle^ collected by the Michigan Fish Commission in 1895. Unio Leibii, Lea. Detroit Eiver, at the upper end of Fighting Island,, collected by Mr. Walker in 1873 or 1874, and identified by the late Dr. James Lewis. Unio multiradiatus. Lea. Same locality, collector and date as for the preceding species ; also, Thames Eiver, Ontario, from the collection of the late Dr. George A. Lathrop. Unio sulcatus. Lea. (=U. perplexus, var. perobliquus,, Conrad. Types from Detroit River, and Wabash R., Indiana.) Collected by Mr. Walker in the Detroit Eiver at the upper end of Fighting Island, in 1873 or 1874 ; at the: r 2 Canadian Record of Science. .pperendof Bene isle in 1894 a^i^^^the^™ at the locality first mentioned, by the Mic , Commission, in 1895. Unio verkucosus, Barnes. 1 ^t thP Detroit Kiver oti Belie isits, Main channel ot tne ijewuii. Detroit River opposite Orrassy ismu , Walker in 1895. Ottawa, July 9th, 1895. the same river, Michigan Fish otf Belle Isle, ion in 1895, and oUected by Mr. in his collection, le Detroit Kiver ctii, A Footiana, mritana deltoidea, I rugosa; Uf'o Is, U. gihhoms, TJ. diatiis, U. nasutus, %8, TJ. Bangianus, and IL verrucosus. ■f y ■■'^V