No. 5-] THE MALE OF PERIPATUS EISENII. 



253 



FIG. 2. 



other external characters, apart from the number of append- 

 ages, in the appearance of the posterior portion of the body, 

 which, embryos as 

 they were, showed 

 them to be males. 

 The anterior legs 

 of the males are like 

 those of the females, 

 each possessing four 

 pads and a pedal 

 groove. The ne- 

 phridial opening is 

 on the second pad 

 from the base, on 

 the fourth and fifth 



leg, as in the female. On the third posterior leg the proximal 

 pad becomes much reduced and entirely disappears on the 

 penultimate leg, while on the last leg only the two distal pads 

 remain, with a portion of the original second proximal pad. 

 JY f{ On the four 



posterior pairs 

 of appendages 

 there are no 

 pedal grooves, 

 and here begins 

 the difference 

 between the ap- 

 pendages of the 

 two sexes. In 

 the place of the 

 pedal grooves, 

 which are en- 

 tirely wanting 

 onthe third and 

 fourth posterior 



legs, there are two long, soft papillae for each appendage. This 

 is invariably the sign of the male Peripatus Eiscnii, and these 

 papillae, with an opening at the tip for the outlet of the crural 



AC: 



FIG. 3. 



