STUDIES IN MAMMALIAN EMBRYOLOGY. 391 
I will not myself propose to substitute more appropriate 
names for those introduced by Huxley, having pointed out the 
necessity of a thorough revision of that classification on other 
grounds than verbal emendation. But I think we should in 
- the meantime allow these terms, that have fulfilled an important 
function in stimulating research, to become obsolete, now that 
on different sides independent-investigators are busy preparing 
the ground for a renewed and exhaustive study of all the phe- 
nomena of placentation throughout the mammalian class. 
INDEX. 
PAGE 
INTRODUCTION . 283 
Cu. I.—Early stages in ate dee clonerent of the Neder Sel agua 
sketch of the development of yolk-sac and allantois . 286 
Cu. I1.—The histological modifications in the uterine tissue during 
pregnancy . , 6 UL 
Cu. III.—The physiology of the Redeohige? s plcenanion 2 . 337 
Cu. 1V.—Recent authors on the phenomena of placentation . . 847 
Cu. V.—Additional reflections . : 371 
Appr.—Tabular comparison of the vamenclatae: of eertain fetal Ean 
raaternal structures that take part in the placentation of 
the mammalia ; ‘ : ; » 392 
VOL. XXX, PART 3.—NEW SER. GC 
