Contributions to the Crustacean Fauna of South Africa. 223 



epipod small, reaching apex of 3rd joint, outer margin strongly 

 angular. 



Maxillipeds $ , 4th joint not so much expanded as in $ , as long 

 as broad, 5th joint half as long as 4th, 6th joint a little shorter than 

 4th, 7th joint equal to 5th, epipod scarcely reaching apex of 

 3rd joint. 



First peraeopod (gnathopod) similar in both sexes, 2nd joint 

 longest, 5th joint equal to 3rd, fusiform, not expanded, outer 

 margin with a few setae, inner margin with shorter and more 

 numerous setae, 6th joint not quite as long as 5th, 7th joint minute, 

 biunguiculate. 



Second and following peraeopods stouter and rather shorter, 2nd 

 and 3rd joints both shorter than 5th, 7th joint triunguiculate. 



Marsupial plates on segments 2, 3, 4. 



First pleopod $ , distally expanded, without rarni. 



First pleopod ? (operculum) broader than long, rounded ; distal 



margin concave. 



Second pleopod $ , peduncle apically pointed, exopod arising some 

 distance from apex, penial filament not projecting much beyond apex 

 of peduncle. 



Third pleopod, outer ramus apically blunt, with 3 strong plumose 

 setae, one on outer angle, two on inner, inner ramus almost straight, 

 suture between its 2 joints oblique, 2nd joint not projecting much 

 beyond apex of outer ramus. 



Fourth pleopod, inner ramus 1-jointed, half as long as outer 

 ramus, narrow and tapering to an acute point, outer margin (away 

 from outer ramus) setulose. 



Uropods two-thirds length of pleon, peduncle nearly one-third 

 length of pleon, rami longer than peduncle, inner ramus longer than 

 outer, with apical and marginal groups of setae. 



Length : 4 mm. ; breadth : 1 mm. Second antennae : 6 mm. 



Colour: In spirit, whitish, with dark pigment specks, circular 

 (more or less) in the adult, stellate in younger specimens. 



Locality: Sea Point, Cape Town. 19/5/96. (R. M. Lightfoot.) 

 Several J $ and 2 ? ? (one with ova). (S.A.M. No. A252.) 



Kalk Bay, False Bay. 26/5/96. (E. M. Lightfoot.) Several $ $ 

 and young. (S.A.M. No. A251.) 



This species closely resembles I. longiantennata, Thielemann. The 

 second antennae, however, are even longer proportionately than in 

 that species, the shape of the head is different, the maxillipeds in 

 the $ differ in the 4, 5, 6, 7 joints, and the epipod in both sexes 

 does not extend beyond the apex of 3rd joint. 



