NIPPLES OF MAESUPIALIA 47 



mences, does it experience a change, in that 

 the channels — which we call the nipple-pouches 

 — are everted like the finger of a glove, so 

 that the papilla originally situated at its 



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I' 



N h ''In I 



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Fig. 15a. — Marsupium of a Young Kangaroo, show- 

 ing THE Four Follicular Apertures through 

 WHICH THE Future Teats are Protruded. 

 (Morgan. ) 



root now comes to the top of a fairly long 

 nipple (Fig. 15b). The young take this into 

 the mouth, which, as is well known, is 

 especially adapted to this purpose. 



