206 Annuls of Hie South African Museum. 



GrAMMARTJS NIGROCULTTS 11. Sp. 



(Plate XXVII. Fig. 23.) 



Head not equal to first 2 peraeoii segments, antero-lateral lobe 

 rounded. Eyes moderate, oval, set close to the margin of the lobe. 

 Side-plates 1-4 as deep as their segments, inferior margin of 1-3 

 rounded, setose but less so than in ccqwisis, of 4 sparsely setose, 

 antero-inferior angle rounded, postero-lateral angle subacute. 



Pleon segments 1-3 with a few short setae, 4-5 with more numerous 

 and longer setae on posterior margin, 6 with a subtnedian gixmp of 

 4 setae and 1 spine on either side near base of telson, postero-inferior 

 angle of 3 quadrate, without produced point, posterior margin with a 

 few slight setiferous indents, inferior margin of 1-3 sparsely setose, 

 the setae not arranged in transverse rows. 



Telson. as long as broad, cleft nearly to base, lobes dehiscent only at 

 apex, tapering slightly, apices rounded, margins and apices setose, 

 1 large spine on upper sui'face just beyond middle of outer margin. 



First antenna reaching to end of peraeoii, the peduncle to middle 

 of ultimate peduncular joint of 2nd antenna, 2nd joint f 1st, 3rd 

 i2nd, flagellum at least twice as long as peduncle, accessory fiagellum 

 4-jointed. 



Second antenna a little stouter than and about half the length of 

 1st, gland-cone acute, reaching nearly to end of 3rd joint, 4th and 5th 

 subequal, flagellum equal to peduncle, ca. 17-jointed. 



Mandibles, cutting-edge 5-dentate in left, in right 4-dentate, 

 secondary cutting-edge 3 dentate in left, in right a 4-pronged tubercle, 

 spine-row with ca. 5 spines, 2nd joint of palp scarcely 2^ times as long 

 as broad, 3rd equal to 2nd, elongate- diamond shaped, thrice as long 

 as broad. 



First and second gnathopods similar but 1st a little shorter and 

 stouter, 6th joint not half as long again as 5th, equal in width to 5th, 

 oblong, not distally widened, palm slightly oblique, gently convex, 

 defined by 2 spines, finger matching palm. 



First and second peraeopods nearly as spinose as in capensis, but 

 much less setose, especially 2nd and 4th joints, hind margin of 5th 

 with 5 spines, of 6th with 6 groups of 1 spine and 2 setae each, 7th 

 with 3 spine-setae on inner margin. 



Third to fifth peraeopods, 2nd joint oval, anterior margin spinose 

 but not setose, hind margin serrulate and setose, convex in 3rd peraeo- 

 pod, straight in distal half in 4th and 5th peraeopods, postero-inferior 

 angle rounded, reaching to middle of 3rd in 3rd peraeopod, to end of 



