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later stages of development and the metamorphoses of animals; 

 Adaptation to environment. The chief Assistant in the laboratory 

 work was Mr. W. E. Castle, and the sub- Assistants were Messrs. 

 J. H. Gerould, H. V. Neal, and W. S. Nickerson. 



As in 1892-93, Zoology 2 was carried on by Dr. Davenport, who 

 had as Assistant in laboratory work Mr. W. S. Nickerson. The 

 Department has been fortunate in having the services of Mr. 

 Nickerson for a number of years in this course. He leaves this 

 year to become Professor of Biology in the University of Colorado. 

 It is scarcely to be expected that so faithful and efficient an As- 

 sistant can usually be retained in this position for so long a period. 

 The lectures and the laboratory work have followed without mate- 

 rial change the general plan long since adopted. 



The new half-course by Dr. Davenport — Experimental Mor- 

 phology — was conducted in the second half-year, a portion of the 

 Aquarium Room in the basement having been fitted up to serve 

 temporarily for this purpose. It was found that the room could 

 not be adequately heated during very cold weather, but this will 

 be remedied during the coming year. The course is intended 

 for those who desire to pay particular attention to problems of 

 growth and the development of organisms, with special reference 

 to artificial modification and control. The introductory lectures 

 were on methods of work in experimental morphology, the suc- 

 ceeding ones being devoted to variation in development as the 

 result of crossing and of changes in external conditions. 



The laboratory work of each student was distinct from that of 

 the others. The following topics indicate the nature of some of 

 the experiments : Individual adaptation of organisms to high 

 temperatures; On the artificial modification of cleavage cavity 

 and blastula ; Influence of external conditions on the form of re- 

 generated parts ; The laws of individual and correlated variation. 



Dr. G. H. Parker upon his return from Europe was reappointed 

 Instructor in Zoology and has had charge of Zoology 3 and a new 

 half-course, Zoology 7, occupying the first half-year. 



In resuming charge of Zoology 3, Dr. Parker has continued the 

 plan, inaugurated before he went abroad, of supplementing the lec- 

 tures and regular class work in the dissection of Vertebrates by 

 the assignment to each student of some topic in the Comparative 

 Anatomy of the group. This plan has been found to succeed well, 

 giving a desirable stimulus to individual work as distinct from 



