106 



This, however, they do not do as reference to Table VI will show. For 

 instance Schmidt VII — the oldest embryo in which these structures 

 have been seen — has the majority of its Anlagen of the youngest type. 



Summary. The time of the appearance and disappearance of 

 the temporary epithelial structures connected with the mammary appa- 

 ratus in man, their grouping around the milk points, their arrange- 

 ment with reference to relative width and length and, lastly, their in- 

 dividual form, seem to be more clearly explained by the hypothesis 

 that such structures are the remains of ancestral marsupial pockets — 

 than by considering them as Anlagen of supernumerary mammae. 



Table I. 



