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' INS t ' CL. r <-—006007- at ae i; 4 ~*~ ' , ‘ . an Pe Bs Be > ee Olan + - . ogi see 4 gS ; Da vs A Say ey) it ee - eae ae ' ree? este ss it ae ag oe Re ee at OFS etpevin joo : vey ‘an : ‘a ‘ P ca - d - 7 a hh : ; ay é a: os ai a, rt ; “% na rhs) it , aa! ™ a , * . J ee i =f + "ts, 4 > ~ > P \ = ” » FS ° A, a 1 4 i - ow? Pye a ; : . ik ths ae? - 4 y = , 7 © a & i 7 4 is 7 - * Ave A . ‘ ‘4 4 4 A>* 1? ‘ “ y by 1% 7 4 , a “4 | Gigs { : . a 2%, oY ; , ‘ ’ F r AY se a ' ’ . : "I = be ih . j ‘ a je on HOO > ‘ ater tas ' a MUSEUM OF COMPARATIVE ZOOLOGY. 7 REPORT ON THE ZOOLOGICAL LABORATORY. By Proressor E. L. Marx. THE following table gives the number of students in the vari- ous classes of Harvard College, the Lawrence Scientific School, and other departments of the University, who were in attendance on the several courses in Zodlogy during the College year 1901-02, the numbers printed in italics indicating Scientific - School students : — 12+23 | 23+3 | 25+6| 31+10|6+6)| 1 6 6+1/12+5]| 6 TED o+7 | 8-65 1+1| +4 1 +3 +1 +1 1 199 + 68 = 267 The corresponding information about students of Radcliffe College is given in a second table : — Soph. | Fresh. | ‘Spec. 8 ANNUAL REPORT OF THE There has been no change during the year in instructors, nor in their rank, and the courses have been carried on in most cases substantially as in the preceding year. The assistants in the sev- eral courses are named in connection with the statements about the work of the courses. In Zodlogy 1 the students have been required, as in 1901-02, to concentrate their laboratory work. Professor Parker has had as Chief Assistant Mr. R. S. Breed, and: as Sub-Assistants, Messrs. Grant Smith, Chauncy Juday (who was early obliged to withdraw from the University on account of serious sickness), and J. M. Johnson. The Assistant in the course given to students of Rad- cliffe College was Mr. C. W. Hahn. It is proposed hereafter to devote half an hour of each three-hour laboratory exercise to an informal review and quiz. The lectures in Zodlogy 2, by Dr. Castle, were substantially like those of previous years. The laboratory exercises were somewhat changed. The flat-worm type was studied in perma- nent entire preparations and in prepared sections of the ectopara- site Bdelloura. By shortening somewhat the time hitherto de- voted to the anatomy of the frog, it was possible to give some attention to the external features of the metamorphosis of the tadpole. The Chief Assistant in the course was Mr. A. W. Peters, the Sub-Assistants Messrs. C. H. Lander and J. A. Long. The Assistant in the course given to Radcliffe students was Mr. Grant Smith. The number of lectures in Zodlogy 3 was increased from sixty- one, the number given in 1900-01, to sixty-six. The course was attended by a larger number of students than in any previous year, forty-one having been enrolled. The laboratory work was with the same representatives of the classes of vertebrates as pre- viously, except that the cat was dissected in place of the rabbit, satisfactory arrangements having been made for procuring mate- rial. Dr. Rand had as Chief Assistant Mr. F. W. Carpenter; as © Sub-Assistant, Mr. M. E. Stickney. ‘The Assistant in the corre- sponding Radcliffe College course was Mr. W. P. Hager. It is hoped that in the future some time spent by students in the rou- tine labor of preparing skeletons can be saved by providing mul- tiple sets of certain of the skeletons studied. In Zodlogy 4 less attention than usual was given in the lectures to bibliographic methods. In the laboratory fewer metlrods were employed and more time given to the study of preparations of the MUSEUM OF COMPARATIVE ZOOLOGY. 9 animal selected — as usual, Glossiphonia. As in former years, a certain number of lectures were given on the anatomy and his- tology of this leech. The lectures in Zodlogy 5 were given by Professor Mark, as usual, the ground covered being the general development of Ver- tebrates, not including organogeny, but embracing the discussion of many theoretical problems. The laboratory work in both Zodl- ogy 4 and 5 was under the supervision of Dr. Rand, who also super- vised the laboratory exercises of Radcliffe students in Zodlogy 4. Both of Professor Jackson’s courses on Fossil Invertebrates — ZLodlogy 9 and Zodlogy 9a—were given. It seems probable that the plan of dividing Zodlogy 9 into two half-courses has been justified by this year’s experience. The general subjects dealt with by Dr. Castle in the lectures of Zodlogy 11 were Variation and Heredity. The effects of close- breeding and of cross-breeding in relation to variation, and the subject of hybridization were considered in some detail, and, among others, the following topics were discussed: the relation of local races to species, especially when interbred; the part played by sports in race-formation; the nature and causes of prepotency, telegony, xenia, grafts, and graft-hybrids. A number of interesting topics were assigned to members of the class for laboratory work, from several of which important results have been obtained. Dr. Castle has himself continued his breeding experiments with mice and with guinea pigs. Incidental to the main inquiry, which has not yet reached a final solution, certain interesting problems have arisen. A four-toed race of guinea pigs is being rapidly estab- lished, certain individuals having yielded more than fifty per cent of young that possess this peculiarity. As the race becomes es- tablished, it is proposed to study statistically the heredity of the four-toed character in cross-breeding with normal individuals. An experiment of close-breeding with guinea pigs has been carried successfully through several generations, and its results are being carefully studied. Zodlogy 18 was conducted by Professor Parker as in 1900-01, except fora few minor changes. In Zodlogy 15 there were, be- sides the regularly enrolled students, three others who attended all the lectures. Four of the topics assigned to individual students for investigation have yielded results that are to be presented for publication. 2 10 ANNUAL REPORT OF THE Nine students were engaged in research (Zodlogy 20a) under the supervision of Professor Mark. Three of these have com- pleted papers which are ready for publication. Two students in Radcliffe College also carried on researches under direction of Professor Mark, and a third, who was not enrolled, was assisted during a part of the year in some researches in cytology. In future the duty of supervising the researches of advanced students will not fall wholly on the Director of the Laboratory, but will be shared by all the Faculty members of the department. Mr. H. Crawley, though not a student in the department during the year, has published in the Proceedings of the Academy of Nat- ural Sciences of Philadelphia a paper on “ The Progressive Move- ments of Gregarines,” the work on which was begun here during the year 1900-01. Mr. A. W. Peters has made good progress with his work on the metabolism of Infusoria. The final paper on Reissner’s fibre by Mr. P. E. Sargent is nearly ready for publica- tion. Mr. C. H. Lander has finished a study of the anatomy and histology of Hemiurus crenatus. Other papers were completed by candidates for the Doctor’s degree. During the current year Dr. Rand has published No. 126 of the Contributions from this Laboratory, and also numerous abstracts and reviews in the “ American Naturalist.’ Professor Parker had the editorial management of the ‘*American Naturalist” during the absence of Dr. W. McM. Woodworth, from November till March, and besides contributing reviews to that journal and to “ Science,’ has published No. 183 of the Contributions from this Laboratory and also the results of work carried on for the U.S. Fish Commission: “ The Reactions of Copepods to Various Stim- uli and the Bearing of this on Daily Depth Migrations,” in Bull. U.S. Fish Comm. 1901, pp. 105-123. In June, 1902, the degree of Doctor of Philosophy was conferred upon two candidates in Zodlogy, Mr. Robert Stanley Breed, whose thesis was on “The Changes which occur in the Muscles of a Beetle (Thymalus marginicollis Chevr.) during Metamorphosis ” ; and Mr. William Martin Smallwood, whose thesis was entitled “The Maturation, Fertilization, and Early Cleavage of Bulla solitaria.” Dr. Breed has been appointed Professor of Biology and Geology in Allegheny College, Meadville, Pa., and Dr. Smallwood has re- ceived an appointment as Assistant Professor of Zodlogy in the University of Syracuse. MUSEUM OF COMPARATIVE ZOOLOGY. bE Upon recommendation of the Division of Biology, Dr. Charles W. Prentiss was reappointed to a Parker Fellowship for the year 1902-03. His first year abroad was spent at Freiburg i. Br. and at the Naples Zodlogical Station, where he was the occupant of the Smithsonian Table for a number of months. The Virginia Barret Gibbs Scholarship for 1901-02 was held by Mr. W. Martin Smallwood. Eleven persons, instructors and advanced students, have been carrying on studies at the Labora- tory of the U.S. Fish Commission at Wood’s Hole during the summer of 1902. Of these, eight have received aid from the Hum- boldt Fund. The meetings of the Zodlogical Club were held on Thursday afternoons throughout the year. The transference of the instruction in Geology to the new southwest corner of the University Museum has made it possible to assign to the Department of Zodlogy several additional rooms, which, with the alterations and renovation of present quarters, will give the department much better facilities for instruction, and especially ample space for research students. Contributions from the Zodlogical Laboratory for the Academic Year 1901-02. 126. Ranp, H. W.— The Regenerating Nervous System of Lumbri- cidze and the Centrosome of its Nerve Cells. Bull. Mus. Comp. Zool., Vol. 37, No. 3, pp. 88-164. 8 pls. September, 1901. 127. FRAnpSsEN, P. — Studies on the Reactions of Limax maximus to Directive Stimuli. Proc. Amer. Acad. Arts and Sciences, Vol. 37, No. 8, pp. 183-227. 22 figs. October, 1901. 128. Yerkes, R. M.—A Contribution to the Nervous System of Gonionemus murbachii. Pt. 1. Amer. Jour. of Physiol., Vol. 6, No. 6, pp. 434-449. February, 1902. ) 129. OppeNHEIMER, A.— Certain Sense Organs of the Proboscis of the Polychaetous Annelid Rhynchobolus dibranchiatus. Proc. Amer. Acad. Arts and Sciences, Vol. 37, No. 21, pp. 551-569. 6 pls. April, 1902. 130. Wittiams, S. R. — Changes Accompanying the Migration of the Eye and Observations on the Tractus opticus and Tectum opticum in Pseudopleuronectes americanus. Bull. Mus. Comp. Zodl., Vol. 40, No. 1, pp. 1-57. 5 pls., 7 figs. May, 1902. 131. Yerkes, R. M.— A Contribution to the Nervous System of Gonionema murbachii. Pt. II. Amer. Jour. of Physiol., Vol. 7, No. 2, pp. 181-198. May, 1902. 12 ANNUAL REPORT OF THE 132. Bieetow, M. A. — The Early Development of Lepas. HV. WILSON. ‘The Sponges. “Aes om McM. WOODWORTH. The Nemerteans. te “The Amnelids. — ac “he Hegre Kom Ra - ¥ ~*~ “e) c= : 5 iS witht ~ ay ~ J ¥ PUBLICATIONS OF THE 3s — MUSEUM OF COMPARATIVE ZOOLOGY =~ AT HARVARD COLLEGE. There have been published of the BuLLETIN Vols. L. to XXXVIL5 of the Memoirs, Vols. I. to XXIV. | ‘ Vols. XXXVIII., XXXIX., XL., and XLI. of the Borisiny and Vols. XXV., XXYVI., XXVIL. and XXVIII. of the AMxrmoums, are now in course of publication. The BuLLeTin and Memoirs are devoted to the pubnewtecn of | original work by the Professors and Assistants of the Museum, of — investigations carried on by students and others in the different — Laboratories of Natural History, and of work by specialists based — upon the Museum Collections and Explorations. 06 a Ls The following publications are in preparation : — GAS Reports on the Results of Dredging Operations from 1877 | to 1880, in eerie oe Alexander Agassiz, by the U. S. Coast Survey Steamer ‘ Blake,” eases oF Commander C. D. Sigsbee, Uz S.N. »and Si etna K. Baril U: s. N,, Commanding. a Reports dn the Results of the Expedition of 1801 of the U.S. Fish. Govniestaht f a Steamer “ Albatross,” Lieut. Commander Z. L. Lente a Ss. Ni -Covr T $: manding, in charge of Alexander Agassiz. ’ : Reports on the Scientific Results of the Expedition to the Tropical Pacific, in . charge of Alexander Agassiz, on the U.S. Fish Commission Steamer “ Albatross,” from August, 1899, to March, fone, € Commander Jefferson F. Moser, U. S. N., Commanding. . eee “ Contributions from the Zoological Laboratory, Professor E. L. Mark, Director. Contributions from the Geological eipibiecie in charge of ‘Professor N. SK Shaler. Lae th es SEE ghey ty nny Sete Sy agers iy bh leap at tie eo den) 1 Pet We me NES e800 A enn 25 ae 5 Oe PONTE e WT NTO MESES eee Amey we WAU pre! Se SW wet Swept} De UL Sen, Nee Ny 0g Oy ents eR Oy oe ee ers hatte aa ets A hes ie ie Ys Se, ee Td Sees ew ay wee bad a AEE Un ORAL Me ye ke Se Bi Re. woe, Set ere H Ue Ma Netra wegye + eee ey ore ee Mme oe (Oey Oop guray RM Og HY HOW NRF E EAU WET Bmy Fu Bbaree PINPAL YR EN Mr emery She et Leet EEE Baryon Gt em ah a Oe ta Fae, yee, "mete See tyeley : 7 re WO Cee es OP Ly ¥ ow ; i . “ : ttle Ie Op we PUI bieegiy . ; Laake ee Sate seas ran SO WPUNWNe © ite Perey VU Uy HMO, y O° 99 9+ 0" « Neate CUA At Sra ace os Me eee le ah SOME UM ghia any. Ne Re ee te ne ery hee PSN etre Om Qi FO NEO ROU OH) bog ene me Biase Wels OO a hw iw, Pa tee wre» ha ley ee ee De aan on Sese are RY