34 



XXXVI. The Development of the Scales of Lepidosteus. B} r W. S. 

 Nickerson. 26 pp., 4 pi. July, 1893. 



XXXVII. Studies in Morphogenesis. I. On the Development of 

 the Cerata in JEolis. By C. B. Davenport. 8 pp., 2 pi. Jury, 1893. 



Since the last report there has also been published "Polychoe- 

 rus caudatus, nov. gen. et nov. sp.," by Edward Laurens Mark. 

 " Festschrift zum siebenzigsten Geburtstage Rudolf Leuckarts," 

 pp. 298-309. 1 PL Leipzig, [Oct.] 1892. Also the translation of 

 Hertwig's " Lehrbuch der Entwicklungsgeschichte," etc., under the 

 title, " Text-book of the Embryology of Man and Mammals." 



The first part of Korschelt u. Heider's " Entwicklungsgeschichte 

 der wirbellosen Thiere," by Drs. Mark and Woodworth, is nearly 

 ready for the printer. 



By the appointment of an additional Instructor in Zoology more 

 time will be allowed for the supervision of research work, and two 

 half-courses are added, one by Dr. Parker on The Nervous System 

 and its Terminal Organs, the other by Dr. Davenport on Experi- 

 mental Morphology. 



The most urgent need of the Department is still the proper equip- 

 ment of the aquarium and vivarium, there being no adequate pro- 

 vision for keeping even the animals required in the laboratory work 

 of the regular courses ; these are often needed at a time when fresh 

 material cannot otherwise be had. But, for the proper develop- 

 ment of the department, provision for keeping fresh material to be 

 used in the class-work of undergraduates, is less important than 

 it is to have well arranged compartments in which animals may be 

 subjected to constant and predetermined conditions of environ- 

 ment, the effects of which may be systematically studied. Pro- 

 vision should be made for carrying on investigations of this kind 

 running over long periods of time, as well as for the briefer experi- 

 mentations which may be carried on by students during the term 

 of a single course. Those engaged in embryological work should 

 also be provided here with every facility for accumulating and 

 keeping under control the material needed in their researches. 



The necessities of the Department in this particular, which have 

 long been anticipated by the Curator, so far as regards the space 

 in the Museum building required, cannot much longer remain un- 

 satisfied, unless we are willing to accept an inferior position in the 

 facilities afforded for advanced work in Zoology. 



