OF PERIPATUS CAPENSIS. 875 



The -antennae are ringed and taper slightly till near their 

 termination, where they present a slight enlargement in spirit 

 specimens, which in its turn tapers to its termination. 



The rings consist essentially of a number of coalesced primary 

 papillae, and are, therefore, beset by a number of spines like 

 those of the primary papillae (described below). They are more 

 deeply pigmented than the rest of the antenna. 



The free end of the antenna is covered by a cap of tissue like 

 that of the rings. It is followed by four or more rings placed 

 close together on the terminal enlargement. There appears to 

 be about thirty rings on the antennae of all adults of this species. 

 But they are difficult to count, and a number of small rings 

 occur between them, which are not included in the thirty. 



The antennae are prolongations of the dorso-lateral parts of 

 the anterior end of the body. 



The eyes are paired and are situated at the roots of the 

 antennae on the dorso-lateral parts of the head. Each is placed 

 on the side of a protuberance which is continued as the an- 

 tenna, and presents the appearance of a small circular crystal- 

 line ball inserted on the skin in this region. 



The rings of papillae on that part of the head from which 

 the antennae arise lose their transverse arrangement. They 

 are arranged concentrically to the antennal rings, and have a 

 straight course forwards between the antennae. 



The oral papillae are placed at the side of the head. They 

 are attached ventro-Iaterally on each side of the lips. The 

 duct of the slime gland opens through their free end. They 

 possess two main rings of projecting tissue, which are especially 

 pigmented on the dorsal side ; and their extremities are covered 

 by papillae irregularly arranged. 



The buccal cavity, jaws, and lips are described below. 



The Ambulatory Appendages. The claw-bearing legs are 

 usually seventeen in number ; but in two cases of small females 

 we have observed that the anal papillae bear claws, and pre- 

 sent all the essential features of the ambulatory appendages. 

 In one small female specimen there were twenty pairs of claw- 

 bearing appendages, the last being like the claw-bearing anal 

 papillae last mentioned, and the generative opening being placed 

 between them. 



56 2 



