The, Anatomy of Opistho2Mtus cinctipcs. Ill 



a'. 17-18 pairs of claw-bearing pregenital legs. Soutli-western part of 

 Cape Colony (Cape, Paarl, Caledon, and Swellendani Divs.) 



P. capensis (Grube, Sedgw.). 



b\ 20 to 24 pairs of pregenital legs. Natal (Estconrt, Pietermaritzburg, 

 Riet Vlei, Richmond, Dronkvlei and south-eastern part of Cape 

 Colony (K. Will. Town, Katberg.) P. moseleyi (Wood-M.). 



Legs of the genital segment with normal feet and paired claws. 



a'. None of the papillae of the dorso-lateral surfaces incrassated 

 apically. 



a=. Size large ; middle pad of legs narrower, 1'5 to 2-2 times as wide 

 as the proximal pad; large papillae of body more conical 

 (fig. 10). 20 pairs of claw-bearing legs. Kuysna, Albany 



P. sedgioicki, Pure. 



63. Size smaller ; middle pad broad, 2 to 3 times as wide as the 

 proximal pad ; large papillae of body more cylindrical (fig. 9). 



a^. 18 (rarely 19) pairs of claw-bearing legs. Cape and Clan- 

 william Divs P. half ouri (Sedgw.). 



b^. 21-24 pairs of claw-bearing legs. Lions Hill (Cape Town) 



P. leonina, Pure. 



b'. Many of the papillte of the dorso-lateral sv;rfaces of the body 

 incrassated apically. 17 pairs of claw-bearing legs. Knysna 



P. clavigera, Pure . 



B'. Legs with large well-developed coxal organs. (Feet with 1 posterior, 

 1 superior, and 1 anterior distal papilla) . . . . Gen. Opisthopatus. 



16 pairs of claw-bearing legs. Natal (Richmond) and south-eastern part 

 of Cape Colony (Uitenhage and Alexandria Divs.) . . 0. cinctipes, Pure. 



B. Genital opening between the penultimate pair of legs . . Gen. Peeipatus. 



22-25 pairs of legs. Equatorial West Africa (Gabon) . . P. thoUoni, Bouv. 



