Crustacean Fauna of South Africa. 219 



not regularly oval but widest proximally, where it extends upwards as 

 a rounded lobe, narrowing gradually distally to almost normal width, 

 postero-inferior angle rounded, not extending beyond middle of 3rd, 

 hiiid margin setuliferous, 4th and 5th joints not expanded, 6th longer 

 than 5th and equal to anterior margin of 2nd, slender, curved ; 7th 

 slender, unguis 1 length of 7th ; in ? not remarkably long, 2nd 

 expanded, oval a little longer than broad ; hind margin evenly convex, 

 setuliferous ; 6th equal to 2nd, slender, straight. 



Fifth peraeopod in ^ reaching only to the end of 5th joint of 

 peraeopod 4, 2nd joint strongly expanded, upper posterior angle sub- 

 quadrate, not produced upwards, width greatest distally, postero- 

 inferior angle rounded, inferior margin transverse, hind and inferior 

 margins crenulate and spinulose, 4th and 5th joints not expanded, 

 6th equal to 2nd, straight ; in $ nearly as long as peraeopod 4, 2ud 

 joint expanded similarly to that of peraeopod 4, but as broad as long, 

 with a subquadrate upper posterior angle, margin crenulate and 

 setulose. 



First and second uropocls, rami shorter than peduncle, outer a little 

 longer than inner in 1st uropod, rami in 2nd subequal, margins of 

 peduncle and both rami spinose. 



Third uropod, i-amus a little longer than peduncle, with marginal 

 and apical spines. 



Length : 22 mm. 



Colour : Whitish, eyes dark brown. 



Locality : Dassen Island, West and East Coasts of Cape Peninsula. 

 (Dr. W. F. Purcell, R. M. Lightfoot, and K.H.B.) <$ J, ? ? and 

 young. (S.A.M. Nos. 1256, 1283, A2514, and A2875..) 



(Plate XXVII. Fig. 32.) 



A curious form of 2nd guathopod is found in 2 small <$ J from 

 Dassen Island. They measure 10 mm. and show no trace of the 

 dorsal spines on the pleon or of the expanded 2nd joint of 4th 

 peraeopod. The 1st gnathopod is as described above. The 2nd 

 gnathopod has the 2nd joint cylindrical and stout but not expanded 

 as in $ , 4th rounded below, 5th shorter than wide, 6th twice as long 

 as 5th, wider at base and iiici'easing in width distally, where width 

 nearly equals the length, palm transverse, rather strongly emarginate, 

 the emarginate portion either straight or slightly convex, armed with 

 a few spinules, defining lobe rounded, semipellucid, finger straight, 

 reaching to base of defining lobe, unguis indistinguishable. 



The exact nature of these specimens it is difficult to determine. 

 The series is not very extensive, and all the Dassen Island specimens 



