31 



9- Preparations Illustrating the Development of Sper- 

 matozoa IN THE Hemiptera. Exhibited by F. C. 

 Paulmier. 



10. Preparations Illustrating the Development of the 



Spermatozoa in Amphibia. Exhibited by J. H. 

 McGregor. 



1 1 . Preparation showing Alveolar Structure of Pro- 



toplasm IN THE Egg. Exhibited by Prof. E. B. 

 Wilson. 



12. Serial Sections of the Head of young Dog-fish 



(^Squalus acantJiias') . Prepared for the study of the 

 Cranial Nerves. Exhibited bv Dr. O. S. Stronsf. 



13. Sections of Growing Eggs of an Ascidian, Molgula 



fnanhattensis^ Illustrating the Formation of the Albu- 

 minous Food-material or Yolk. Exhibited by H. E. 

 Crampton, Jr. 



14. Peculiar Stages in the Maturation and Fertiliza- 



tion OF THE Egg of an Ascidian, Molgula luaiihat- 

 tensis. Exhibited by H. E. Crampton, Jr. 



15. Exhibit of Cytological Preparations, by Francis B. 



Sumner. 



a. Fertilization stage of Fundulus heteroclltus. Entrance 

 of spermatozoon. 



b. Abnormal amphiaster in periblast of Ainiurus. A nu- 

 clear division with no nucleus present. 



c. Degenerate mitoses. Transition to amitosis. 



16. Maps and Designs of Buildings of New York Zo- 



ological Society. Exhibited by Prof. H. F. Osborn 

 and W. T. Hornadav. 



