OF PERIPATUS CAPENSIS. 877 



at the internal end of this structure. The exact arrangement of 

 the papillae round the outer part of the slit does not appear to be 

 constant. 



The foot is attached to the distal end of the leg. It is 

 slightly narrower at its attached extremity than at its free end, 

 which bears the two claws. The integument of the foot is 

 covered with secondary papillae, but spines and primary pa- 

 pillae are absent, except at the points now to be described. 



On each side of the middle ventral line of the proximal end 

 of the foot is placed an elliptical elevation of the integument 

 covered with spines. Attached to the proximal and lateral end 

 of this is a primary papilla. At the distal end of the ventral 

 side of the foot on each side of the middle line is a group of in- 

 conspicuous pale elevations, bearing spines. 



On the front side of the distal end of the foot, close to the 

 socket in which the claws are placed, are two primary papillae, 

 one dorsal and the other ventral. 



On the posterior side of the foot the dorsal of these only 

 is present. The claws are sickle-shaped, and placed on papillae 

 on the terminal portion of the foot. The part of the foot on 

 which they are placed is especially retractile, and is generally 

 found more or less telescoped into the proximal part (as in the 

 figure). 



The fourth and fifth pairs of legs exactly resemble the others, 

 except in the fact that the proximal pad is broken up into 

 three, a small central and two larger lateral. The enlarged 

 segmental organs of these legs open on the small central di- 

 vision. 



The last (17) leg of the male (PI. 47, fig. 4) is character- 

 ized by possessing a well-marked white papilla on the ventral 

 surface. This papilla, which presents a slit- like opening at its 

 apex, is placed on the second row of papillae counting from the 

 innermost pad, and slightly posterior to the axial line of the leg. 



The anal papillae, or as they should be called, generative 

 papillae, are placed one on each side of the generative aperture. 

 They are most marked in small and least so in large specimens. 

 That they are rudimentary ambulatory appendages is shewn by 

 the fact that they are sometimes provided with claws, and resem- 

 ble closely the anterior appendages.] 



