174 THE GENUS PERIPATUS. 



in which the pigment is either absent or of an extremely light 

 shade. On each side of this line the pigment in the papillae is 

 much darkened. The pads of the legs vary much in colour. 

 In most specimens the distal one is blue^ the middle one brown 

 or orange, and the proximal one brown or orange in the centre, 

 and blue along the outer and inner border. In some specimens, 

 however, they are all blue, and in others all brown or orange. 

 In short, it may be said that the colour of the pad varies from 

 blue with hardly any admixture of brown, to brown or orange 

 without any blue. The distal pad is always the most blue. 

 The row of composite large papillae next to the proximal pad 

 presents the predominant colour of the proximal pad. The 

 blue colour is always absent from the ventral organs, which are 

 either white, brown, or orange. 



In all specimens there is a band of especially dark papillae 

 extending from the ventral extremity of the leg towards the 

 ventral organ (fig. 19) . The opening of the segmental organ 

 is placed in the outer end of this band. The ventral surface 

 is almost always mottled, the blue and yellow pigment being 

 distributed in patches; the colour in each kind of patch extend- 

 ing between the papillae as well as on to them. 



The ridges and papillae of the skin are arranged as in 

 the South African species. 



The antennae resemble those of the South African species. 

 They are ringed and slightly swollen near the free end (fig. 

 16). In none of the specimens that I examined did they 

 present any brown pigment. They are entirely of the blue 

 (violet ?) grey colour, which forms the ground colour of the 

 skin. The rings are beset with spines, and are covered by 

 closely approximated patches of dark pigment such as have 

 been already described. On the anterior edge of the rings at 

 the front end of the antennae there is a row of hexagonal, 

 lighter- coloured spaces. At the bases of the spines also the 

 pigment is lighter than elsewhere on the rings. Between the 

 rings spines and patches are absent^ and the pigment is of a 

 lighter colour. The free end of the antenna is rounded and 

 covered by a cap of integument resembling that on the rings 



