iv _ CONTENTS. 



Pages 



V. Grant Sherman Hopkins. 



On the Entcron of Avierican Ganoids . 411-442 



VI. Edmuxd B. Wilson. 



Arc/ioplasvi, Centrosome, and CJiromatin 



in the Sea- Urchin Egg 443-4/0 



VII. Thos. H. Montgomery, Jr. 



The Derivation of the Freshwater and 



Land Nemerteans, and Allied Questions 479-484 



VIII. Edward Phelps Allis. 



TJie Cranial Mnscles atid Cranial and 

 First Spinal Nerves in Amia Calva . 485-491 



IX. Louis Murbach. 



Preliminary Note on the Life-Jiistory of 



Gonionemiis 493-496 



No. 3. — December, 1895. ( 



I. William A. Locy. ] 



Contributions to the Structure and Develop- 

 ment of the Vertebrate Head .... 497-594 



II. Lilian V. Sampson. \ 



TJie Mnscidatw^e of CJdton 595-628 ' 



III. G. Carl Ruber, M.D. 



A Study of the Operative Treatment for 

 Loss of Nerve Snbstatice in Peripheral 

 Nerves 629-740 



IV. Frederic P. Gorham. 



The Cleavage of the Egg of Virbius Zoste- 



ricola {Smith) 741-746 



GINN & COMPANY, BOSTON, U.S.A. 



