488 



THE PHYSIOLOGY OF REPRODUCTION 



Beneath the epitheliciiil layer in Imth aieas the cells are drawii out 

 and pseudo-tiliroiis. The conditions tor nutrition reseniljle those in 

 the very early hruuan ovum, the tnijiiiolilast lying against a non- 

 vascidar detritus-zone. But in tiie liat there is strong evidence of 

 phagocytosis. The epililastic protoplasm, where it is in contact with 



,ji- 



'■ii^^^^i-:7i^Mvr'''-''->^^}yi^ 



U VJcJJ 



Fi(i. 14G. — The placenta of the bat. (From Nolf'.s "Etude de.s moditii-ations de 

 la luuqueuse uterine Y'endant la gestation idiez le niurin," .Ice//, ih- Iliol., 

 vol. xiv., 1SU6.) 



//!., Museulari.s ; c, unaltered mucosa : Cey., epithelial layer ; <://., glands ; 

 i'.pp-, paraj^lacental layer with blood-spaces {h) ; Art., artery running 

 towards trophoblast ; IV., vein ; 7V., trophoblast with lacunte ; 17/. nil., 

 allantoic villi. 



dead tissue, is "crammed with irregular giuuules, some fatty a.nd 

 others coloured hrown with safranin " (Nolf). The nuniths of the 

 glands opening at the non-end )r)-onic pole are filled ^vith dcliris, and 

 their epithelium is degenerated and desipiamated. As pi'eviously 

 mentioned, no glanil-ducts are ]iresent in tlw I'-oiicJtn pnivjilanntiiiri'. 

 The ])lind ends of the glands are, hoNve\'er, distended witli secretion, 

 and their epithelium is noinial. 



N'(^xt a clianu-e ciccnrs such as Hulirecht descrilied in the hedij-ehog; 

 (see ]). 478). The enilittheliuin of somr of tlie vessels in the jiaiu- 



