355 
UTERUS AND EMBRYO. 
No. 3.] 
Ecto 
PN 
Pe SN 
= OSs a 
pe now ea 
CEG 
é R ees SS. 
ry _ . ! .° > ' 
OW ate AS Ares 
G 
. 
:) 
/ 
«) 
& 
SS 
Cut r.— Transverse section of a rabbit embryo, z# sé¢w, of nine days and three hours. @, wall of yolk-sack composed of ecto- 
derm and endoderm only; v/, vena terminalis; mes, mesoderm; sf/, splanchnopleure; coe, ccelom; ch, notochord; JZd, medullary 
groove; my,myotome; Endo, endoderm; Lcéo, ectoderm; g/, glands; v, blood-vessel; Ae, hyaline uterine epithelium. 
