CONTENTS 



1910 



No. 1. MARCH 



Robert E. Coker. Diversity in the scutes of Chelonia. Fourteen plates. ... 1 

 Edwin Chapin Starks. The osteology and mutual relationships of the fishes 



belonging to the family Scombridae. Three plates 77 



J. Thomas Patterson. Studies on the early development of the hen's egg. 1. 

 History of the early cleavage and of the accessory clea\age. Thirty-two 

 figures 101 



No. 2. JULY 



Harry Lewis Wieman. A study in the germ cells of Leptinotarsa signaticoUis. 



Seventy-three figures 135 



C. W. AND G. T. Hargitt. Studies in the development of Scyphomedusae. 



Forty-nine figures 217 



■James Homer Wright. The histogenesis of the blood platelets. Twenty-one 



figui-es 26.3 



X. M. Stevens. Further studies on reproduction in Sagitta. One hundred 



and two figures 279 



o 



No. 3. OCTOBER 



Robert J. Terry. The morphology of the pineal region in Teleosts. Twenty 

 figures 321 



H. H. Newman and J. T. Patterson. The development of the nine-banded 

 armadillo from the primitive streak stage to birth; with especial reference 

 to the question of specific polyembryony. Fifteen text figures and nine 

 plates 359 



Leland Griggs. Early stages in the development of the central nervous sys- 

 tem of Amblystoma punctatum. Twelve text figures and one plate 425 



iii 



