BIETH or YOUNG. 17 



The remaining nephridia are also visible through the skin, 

 those of the fourth and fifth legs being especially conspicuous 

 by their greater size. 



Fig. 38 represents this embryo in its natural position within 

 the uterusj a position which is retained until birth. 



From January onwards the changes are mainly those of 

 growth. When the young are born^ i. e. in May, the antennae 

 are green, but the rest of the body is either quite white or of a 

 reddish colour. This red colour differs, however, essentially 

 from that of the adult, in the fact that it is soluble in spirit. 

 The just born young vary considerably in size, the average size 

 in the case of Peripatus capensis being from 10 — 15 mm. 

 The just born young of Peripatus Balfouri are about half 

 this size. 



