228 Annals of the South African Museum. 



Telsou with a very small apical notch, lateral margins very slightly 

 concave, 2 apical spines on each apex. 



First antenna reaching nearly to apex of peduncle of 2nd antenna, 

 3rd joint a trifle shorter than 2nd, 1st a little shorter than 3rd, 

 flagellum not quite as long as peduncle, 7- join ted. 



Second antenna not half length of body, ultimate and penultimate 

 joints subequal, flagellum a little longer than peduncle, 16-jointed. 



First gnathopod $ , 4th joint with a rounded pellucid lobe, 5th 

 prominently lobecl, 6th shorter and narrower than 5th, at least 

 2^ times as long as greatest width, widening slightly towards lower 

 apex where it is scabrous and pellucid and produced beyond the short 

 transverse palm as a short rounded lobe, palm with a few setae, finger 

 matching palm. 



Second gnathopod <$ , inner anterior margin of 2nd joint with a 

 well-marked, straight, apically rounded keel, outer front apex has a 

 smaller lobe, 3rd with a strong pellucid lobe on anterior margin, 6tli 

 ovate, widest in the middle, palm oblique, spinose, with a fairly deep 

 but small notch near hinge, and a shallow one near the undefined 

 junction of palm and hind margin, finger overlapping palm and 

 tapering to a fine point, inner margin sinuous. 



First and second peraeopods not strongly spinous or setose, 4th-6th 

 joints spinose on both margins, finger with a very minute setule. 



Third to fifth peraeopods, 2nd joint increasingly expanded, hind 

 margin nearly straight, with setiferous serrations, strongest on 5th 

 peraeopod, postero-inferior angles rounded, in 5th peraeopod reaching 

 to end of 3rd joint, 4th to 6th joints spinulose on both margins, finger 

 with minute setule, all three peraeopods more slender than in the 

 previous species. 



First uropod with marginal spines only on inner ranius. 



Second xiropod with marginal spines on both rami. 



Third uropod, peduncle with 2-3 apical spines, ramus a trifle longer 

 than peduncle, slender, with 3-4 apical setae. 



Length : 12 mm. 



Colour : In spirit, whitish, eyes black. 



Localitij : Dassen Island, West Coast, April, 1897. (E. M. Light- 

 foot.) 2 (J <J ; Hout Bay, Cape Peninsula. 29/12/14. (S. H. 

 Haughton.) 2 $ <$ . (S.A.M. Nos. A3054 and A3067.) 



The specimens which Krauss assigned to Orchestia bottae M. Edw. 

 may perhaps be referable to this species, though I have not seen 

 Krauss' specimens. The description of the 2nd gnathopod of 0. 

 bottae as given by Stebbing in Das Tierreich applies very well to that 

 of the present species. 



