320 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Robinson, A., and Assheton, R. 



'91. The Formation and Fate of the Primitive Streak, with Observa- 

 tions on the Archenteron and Germinal Layers of Rana temporaria. 

 Quart. Jour. Micr. Sci.,Vol. XXXII. pp. 451-504, Pis. XXXIV. 

 and XXXV. 



Ryder, J. A. 



'84. A Contribution to the Embryography of Osseous Fishes, with 



Special Reference to the Development of the Cod (Gadus morrhua). 



Pteport of U. S. Fish. Com., 1882, pp. 455-605, Pis. I.-XII. 

 '86. Preliminary Notice of the Development of the Toad-fish, Ba- 



trachus tau. Bull. U. S. Fish. Com., Vol. VI. pp. 4-8, Plate T. 



Schafer, E. A. 



'76. Description of a Mammalian Ovum in an Early Condition of 

 Development. Proc. Roy. Soc. London, Vol. XXIV. pp. 399-403, 

 Plate X. 



Selenka, E. 



'83. Studien iiber Entwickelungsgeschichte der Thiere. Heft L 

 Keimbliitter und Primitivorgane der Maus, pp. 1-23, Taf. I.-IV. 



'86 u. '87. Studien iiber Entwickelungsgeschichte der Thiere. Heft 4. 

 Das Opossum (Didelphys virginiana), L pp. 101-132, Taf. XVII.- 

 XXIV., XXVI; II. pp. 133-172, Taf. XXV., XXVII.-XXX. 



Tafani, A. 



'89. La fecondation et la segmentation etudiees dans les oeufs des 

 rats. Arch. Ital. de Biol., Tom. XI. pp. 112-117. 



Wilson, H. V. 



'91. The Embryology of the Sea Bass (Serranus atrarius). Bull. 

 U. S. Fish Com., 1889, pp. 209-277, Plates LXXXVIII.-CVII. 



