HUBRECHT. Pl. FF. 
145 146 
epi ORenl Danny » 
oo Minne 2 
Fig. 145. Transverse section through uterus and foetus of Hyrax. 
muscularis, ¢ uterine glaud, #a mv maternal uterine artery and vein, ¢7 tropho- 
blast with bloodlacunae and surrounding allantoic villi; e/a entodermal lining of 
allantois; Z embryo; am amnion. — Fig. 146. The allantoidean diplotrophoblast 
of Nycticebus looked into after remoyal of the embryo and of the left half. — 
Fig. 147. The non-yascular diplotrophoblast of Tarsius looked into after remo- 
yal of the embryo. The presence of a connective stalk has led up to the for- 
mation of a discoidal placenta. -- Fig. 148. Diagram of Nycticebus during the 
formation of allantoidean diplotrophoblast. c extraembryonic coelom, — Fig. 149. 
The same for the Primates, where the trophoblast is directly vascularised by 
means of the connective stalk /. 
