South African Species of Pcripatida. 345 



Length and width of large ? (alive and extended) : 49 x 2-8 mm. 

 > ,, same $ , preserved in ale. sol. of HgCL 2 and 



contracted : 34 x 4 mm. 



Colour. Dorsal and lateral surfaces greenish black to black 

 (becoming dark green after long immersion in spirits), with five 

 darker longitudinal stripes exactly similar to those of balfouri. The 

 lateral band just above the bases of the legs on each side lighter 

 than the dorsal surface. The orange papillae blackened at the apex 

 and exactly resembling those of balfouri in their distribution, except- 

 ing that they are never wanting. 



Ventral surface generally pink in the living animal, pale in pre- 

 served specimens, with numerous papillae more or less tinged with 

 dark green ; traces of a dark, longitudinal, median line and dark 

 transverse lines between the bases of opposite legs rarely present. 



Legs. Outer surface black to greenish black, without any green- 

 tipped orange papillae. Ventral surface like the under side of body. 

 Colour of spinous pads, feet and claws, as in balfouri. 



The orange papillae of the body lose their colour much more 

 rapidly in spirits than is the case in balfouri, the papillae becoming 

 white after a few hours' immersion. I have never noticed orange or 

 red pigment, similar to that found in some specimens of balfouri, 

 in any other parts of the dorsal surface. 



Locality. A number of males and females from under stones in 

 the small ravines on the Cape Town side of Signal Hill (Lions Hill) 

 during the winter months. I have never found this species on Table 

 Mountain nor in any other locality, and it appears to be the only 

 one inhabiting Signal Hill. Its existence there was first pointed out 

 to me by Mr. E. M. Lightfoot. 



Individuals with 22 pairs of legs were found to be just twice as 

 numerous as those with 21 pairs ; this applies to both sexes. I have 

 no doubt as to the specific identity of both these series of specimens. 

 Apart from the fact that I could discover no differences either in 

 habits, colour, or structure, other than the number of legs, is the 

 circumstance of a female with 22 pairs of legs giving birth shortly 

 after being captured to thirteen young, two of which possessed 21 

 pairs of legs and the remaining eleven 22 pairs each. I have also 

 captured a male specimen with 21 pairs on one side of the body and 

 22 on the other. 



9. PERIPATOPSIS SEDGWICKI, n. sp. 



Characters. Claw-bearing legs 20 pairs; the middle spinous pad 

 not very broad, 1-5-2-2 times as wide as the proximal pad. 



