Contributions to the Crustacean Fauna of South Africa. 367 



dwarfs, the <$ measuring only 6'5 mm. The body is thickly clothed 

 all over with longish hairs, the telsou being more sparsely covered 

 than the rest ; the young <$ and the $ are glabrous except for a few 

 short hairs, mostly on the lateral margins. 



In the adult ^ the anterior pair of tubercles on the telson are 

 larger than represented in the figure of japonica, transversely oval, 

 and when the body is unrolled fit closely against the pair on the 

 4th pleou segment, the adjacent margins of the respective tubercles 

 being straight. The posterior tubercles on the telson are flat-topped 

 and setiferous. Telsonic apex and the median lobe broader than in 

 Richardson's figure. Uropod with both rami projecting beyond the 

 telsonic apex. Maxilliped with the lobes on 5th-7th joints very 

 elongate and narrow, as in C. tuberculosa Stebb. Male appendages 

 on 7th peraeon segment close together, long and slender. Male stylet 

 on 2nd pleopod half as long again as ramus, slightly tapering, apex 

 subacute. 



Ovigerous 9 w ^h the telson apically blunter than in the figure 

 of affinis, and the inner ramus of uropod reaching a little beyond 

 telsonic apex. Both rami of uropod apically blunt. The 2 tubercles 

 on 4th pleon segment as well as those on the telsou small but distinct. 

 Mouth-parts modified. 



Immature <$ resembling the $ but with the tubercles a little more 

 strongly developed. 



In other respects the specimens agree with Richai'dsou's descrip- 

 tions, so that apart from the smaller size and the relative lengths 

 of the telsou and uropods in both sexes there are no very marked 

 characters separating the South African from the Japanese specimens. 



A further comparison may also be instituted with C. bicarinata 

 Stebb. (1904, Gardiner's Fauna Maid. & Lace. Archip. vol. 2, pt. 3, 

 p. 712, pi. 52s, and 1905, Herdman's Ceylon Pearl Fish. Suppl. 

 Eep. 23, p. 42, pi. lOc). In size there is scarcely any difference. 

 The apex of the telsou, at least in the Ceylon specimen, closely 

 resembles that of the Natal specimens. The differences are as follows : 

 bicarinata has 2 distinct longitudinal keels on the telson, ending 

 in bosses, and a median swelling at the base of the median lobe, and 

 also lacks the distinct tubercles on the 4th pleon segment and at base 

 of telson ; whereas in the Natal specimens the telson can scarcely 

 be said to be keeled, there is no swelling at the base of the median 

 lobe, and the 2 anterior pairs of tubercles are very distinct and 

 characteristic. Further the lobes of the distal joints of the maxilliped 

 are much more elongate in our specimens than in the figures of 

 bicarinata. 



28 



