160 Annals of the South African Museum. 



dorsal line from the front to a little beyond the middle convex and 

 finely serrate ; near the end this carina is flanked by the commence- 

 ment of a submedian pair of short carinae which rise each into a 

 conspicuous rounded process and then gradually fade away towards 

 the hind margin. The pedigerous segments combined are about 

 half as long as the carapace, the first shorter and narrower than the 

 second, the second and third raised in the middle but flattened and 

 rounded at the sides, apparently overlapping subacute angles ; the 

 fifth cylindrical, not wider than the long, narrow pleon, which 

 greatly exceeds in length the preceding portion of the body. The 

 telson, about as long as the fourth segment of the pleon, has the anal 

 opening near the base, thence narrowing to the apex which is 

 occupied by three spines, forming a kind of fan, with a lateral pair a 

 little higher up ; between these and the middle of the telson two 

 other lateral pairs are placed, successively smaller. 



First antenna with long first joint, more than twice as long as the 

 second, which is rather longer than the third, all three carrying 

 plumose setae, flagella rather shorter than the peduncle, the principal 

 flagellum five-jointed, the accessory four-jointed. In the female 

 specimen the minute fifth joint of the principal flagellum appears 

 to be succeeded by a still smaller sixth joint. In both sexes a couple 

 of setae attached to the fourth and fifth joints have the usual annu- 

 lated appearance. 



The second antenna of the female carries three plumose setae on 

 the rather large first joint, one such seta on the small second joint ; 

 the third joint is narrow 7 , nearly as long as the first, with a small 

 tooth near the base and a seta midway between that and the apex ; 

 the fourth joint is very slender, but fully twice as long as the third, 

 with some apical setules. In the male specimen the flagellum has 

 the annulated appearance indicative of incomplete maturity. 



The uppar lip has the free border a little emarginate. The spine- 

 row of the mandibles consists of about thirteen spines. On the palp 

 of the first maxilla the subapical seta is much shorter than the 

 apical. The first maxillipeds have seven unequal loosely disposed 

 bianchial sacs on the epipod, and two very small coupling spines on 

 the basal joint. In the second maxillipeds the third joint is distinct. 

 The third maxillipeds have the second joint not apically produced or 

 widened, shorter than the remaining joints combined, the third joint 

 short, distinct, the fifth longer than the sixth, apparently less so in 

 the female than in the male, the seventh fringed with somewhat, 

 adpressed spines, and, as it were, prolonged by an apical spine 

 exceeding the length of the joint itself. 



