26 ANNUAL REPORT OF THE 



erly equipped for chemical, electrical, thermic, and photic work, 

 which cannot be attempted under present conditions with any 

 likelihood of success. Since my last Report the following " Con- 

 tributions" embodying work done in connection with this course 

 have been published : Nos. LXXII, LXXIV., and LXXIX. of the 

 list embraced in this Report. 



Zoology 16, by Dr. Parker, was given this year in accordance 

 with the plan announced last year. After a short introduction to 

 the study of the nervous system, the remaining lectures in the 

 course were devoted to an extended consideration of the anatomy 

 and physiology of the central nervous organs, and the terminal 

 organs of efferent nerves. The experiment was tried of requiring 

 each student to prepare a short paper on some topic connected 

 with the subject matter of the lectures. This exercise, though 

 stimulating to the student, can, of course, never form a satisfactory 

 substitute for laboratory work. There were in regular attendance 

 on the lectures four students who were not enrolled. 



The number of students in Zoology 20a was not quite as large 

 as in the previous year, but with the research students in Radcliffe 

 College absorbed the most of the time of the instructor left from 

 the work of Zoology 4 and 5. The "Contributions" written in 

 this course, which have been completed and published since my 

 last Report, are: Nos. LXX., LXXL, LXXVIL, and LXXXI. ; 

 those which are " in press" are two by Porter, and one each by 

 Neal, Lewis, Hamaker, and Linville. 



At the last Commencement, the degree of Doctor of Science 

 in Zoology was conferred upon Mr. Alfred Goldsborough Mayer, 

 whose thesis was completed and published in the spring of 1896, 

 and who was allowed, for reasons stated in my last Report, to come 

 up for his examination in the autumn of 1896 ; also the degree of 

 Doctor of Philosophy upon two candidates in Zoology, Mr. John 

 Irvin Hamaker and Mr. Henry Richardson Linville. The titles 

 of their theses appear in the Contributions now " in press." 



Dr. H. S. Jennings has resigned the travelling Parker Fellow- 

 ship, and returned to America. He expects to give his time 

 in future to teaching and research. As the result of his studies 

 in Jena during the winter, he has published in the Journal of 

 Physiology a paper entitled, " Studies on Reactions to Stimuli in 

 Unicellular Organisms. I. Reactions to Chemical, Osmotic, and 

 Mechanical Stimuli in the Ciliate Infusoria." 



