[101] perhaps in a majority of the cases there are other evidences 

 of such adhesions having been present, and, as Schaeffer 

 points out, the caudal region, like other projecting portions 

 of the embryo, is especially liable to stick to the amnion. 

 The adhesions are to be regarded, however, merely as a factor 

 which may induce the persistence of an otherwise transitory 

 structure and it does not follow that such persistence is always 

 the result of adhesions. On the contrary, we find in certain 

 animals that the caudal filament normally persists. Accord- 

 ing to Braun, this is probably the origin of the tail-stump, 

 composed of areolar tissue, found in Inuus pithecus, and simi- 

 lar apendages are also found sometimes in the Chimpansee, 

 as Eosenberg has described. 



(18) 



