42 . K. MITSUKUKI. 



Miiller'schen gänge u. des Afters. Frankfurt 1874. 



13. : — Der Primitivstreifen bei Yogelembryonen (Hiihn u. 



Gaus) Cas sel. 1879. . . 



14. K. Mitsukuri and C. Ishikawa : — On the formation of the Germinal 



Layers in Chelonia. Quart. Jour, of Micros. Sei. 

 1886. Also Jour, of Science College. Imp. Univ. 

 Tokyo, Japan. Vol. 1. 



15. A. OstromiiotF: — Zur Entwickhmofsg'eschichte der Eidechsen 



Zoöl. Anz. Nr. 292. 



16. Jv. Perenyi : — Entwicklung des Amnion, VVolff'schen Gauges u. 



der Allantois bei den Reptilien. Zoöl. Anz. Nr. 274. 



17. A. A, W. Hubrecht : — The Placentation of Erinaceus Europeus, 



with Remarks on the Phylogeny of the Placenta. 

 Quart. Jour. Micros. Sei. Vol. XXX. 1889. 



18. J. A. Ryder : — The Origin of the Amnion. Amer. Natur. 1886. 



19. A. Fleischmann : — Mittelblatt und Amnion der Katze. Erlan- 



gen. 1887. 



Explanation of Figures in Plates I — X. 

 List of Reference Letters. 



* a. (Fig. 2) iucoustaut tidveutitious folds, a. I. f. anterior limiting fuvrow= 

 vordere Grenzfarche. All. Allantois. Amn. Amnion, b.v. blood-vessels. Coel. 

 coelom witliin tlie embryo. CoeV. extraembryonic coelom. vh. notochord. Ej>i. 

 Epiblast. H. f". head-fold. H///^ hypoblast. Lrt^/. J )wt. Lateral fold of Amnion. 

 Mes. mesoblast. ^V. R. Can. neureuteric canal. Post. Ta. Amii. Posterior tube of 

 Amnion. j)ro.v. />t. proximal part of posterior tube of Amnion. Proam. Proamnion. 

 Reimiatit. Post. Tu. Amn. Renmant of posterior tube of Amnion. Ser. Knv. Serous 

 envelope. Sero-Amti-Conn. Sero-Amniotic connection, v. v. a. anterior vitelline vein. 

 yk. yolk. 



In colored figures of sections, the epiblast is always colored red, the mesoblast 

 blue, and the hypoblast yellow. In PI. IX. blue stands for the somatic mesoblast, 

 and green for the splanchnic mesoblast. 



