350 Annals of the South African Museum. 



The narrow slit-like genital opening is raised on an eminence and 

 is situated at some little distance from the anus and hind end of the 

 body, which projects some distance beyond the last pair of legs. In 

 this respect the genus bears some apparent resemblance to the con- 

 dition which obtains in the Australasian species. 



The dorsal surface is provided with a fine median white line, and 

 the outer jaws, like those of Peripatopsis, possess a small accessory 

 tooth at the base of the main tooth. 



This genus to some extent resembles the Australasian species of 

 Peripatoidcs, in which the papillae of the feet are similarly arranged, 

 and the genital opening is also situated between the last pair of fully 

 developed legs. It differs, however, in having a transverse genital 

 opening, and in the absence of receptacula semi iris in the female. 



Only the following species is known : 



12. OPISTHOPATUS CINCTIPES, n. sp. 



Characters. Claw-bearing legs 16 pairs ; the middle spinous pad 

 broad, two to three times as wide as the proximal pad. Papillae of 

 dorsal and lateral surfaces cylindrical or clavate, many of them being 

 enlarged in the distal part and constricted towards the middle or 

 base, mostly flat-topped at apex. 



Length of spirit specimen 21 mm., breadth 3^ mm. 



Colour of spirit specimens. Dorsal and lateral surfaces very dark 

 green, the lateral band on each side just above the bases of the legs 

 paler green. The ordinary papillae very dark, almost black in the 

 distal part, the orange-brown papillae scattered amongst these in the 

 same proportion as in P. balfouri, with or without dark green round 

 the tips. Dark medio-dorsal stripe distinct, divided longitudinally 

 in places by a fine white line. 



Outer surface of legs and the sides of the body between the legs 

 dark green, with numerous dark-green papillae and a small number 

 of orange-brown ones. Ventral surface of legs peculiarly marked 

 with transverse bands of pale papillae, alternating with similar bands 

 of dark-green ones. Spinous pads green, the proximal pad and the 

 .proximal part of the middle pad generally yellowish. 



Ventral surface of body pallid, pigmented with dark green in the 

 pores at the bases of the legs, and, in one specimen, on an irregular 

 median area behind each pair of legs. Numerous more or less dark- 

 green papillae are scattered over the whole surface. 



Locality. Two specimens (one of which on opening proved to be 

 a female) from Dunbrody, near Blue Cliff Station, Uitenhage Div. 

 (Rev. J. A. O'Neil, 1898). 



