CONTENTS OF VOL. II. 



No. I. — July, 1898. 



PAGES 



I. Ethan Allen Andrews. 



Filose Activity in Metazoan Eggs .... 1-13 



II. Charles B. Wilson. 



Activities of Mesenchyme in Certain Larvae 15-23 



III. O. P. Hay. 



Observations on the Gen?is of Fossil Fishes 

 called by Professor Cope, Portheus, by 

 Dr. Leidy, Xiphactiniis 25-54 



No. 2. — October, 1898. 



I. Henry Leslie Osborn. 



Observations on the Anatomy of a Species of 

 Platyaspis fou7id Parasitic on the Uni- 

 onidae of Lake Chaiitanqita ..... 55-^7 



II. Agnes M. Claypole, Ph.D. 



The Embryology of the Apterygota . . . 69-76 



III. \Vm. E. Ritter. 



A Feza Facts Concerning the Relationships 

 and Repro deletion of Some Bering Sea 

 Tunicates 77-8 1 



IV. Edward Phelps Allis, Jr. 



TJic Homologies of the Occipital and First 



Spinal A'e^ves of Amia and Teleosts . . §3-97 



