FCETAL NUTRITION; THE PLACENTA 



441 



Jenkinsoui has lately investigated the placenta in a species of 

 Lepilemur and found that it conforms in structure to those of other 

 members of the Lemuroidea excepting Tarsius. " In the Lemuroid 



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placenta the relation l)etween foetal and maternal circulations is 

 brought about Ijy the production of vascular trophol elastic villi, which 

 fit into crypts Uued hj a persistent uterine epithelium. So the 

 placenta, therefore, resembles that of an ungulate: it is of the so- 

 called ' Indeciduate tyi^e. The allantois is large and occupies a great 



191C 



Jenkinson, "The Placenta of the Lemur,'' (Juar. Jour. Micr. Srii'ncc, vol. Ixi., 



