Crustacean Fa/mo of SontJi Africa. 275 



LAETMATOPHILUS TRIDENS 11. sp. 

 (Plate XXVIII. Fig-. 22.) 



<$ . The single specimen is somewhat incomplete, but is well 



enough preserved to show the essential characters. 



Peraeon segment 1 with 2 transverse ridges and a depression 



between them, segments 2-4 each with 1 very small medio-dorsal 



tubercle. 



First antenna as in L. purus. Second antenna lost- 

 First gnathopod similar to that of L. purus, but 6th joint without 



the row of serrate spines leading to palmar angle, finger very thick, 



outer margin very convex, 10 closely-set spine-teeth at distal end of 



inner margin. 



Second gnathopod, anterior margin of 2nd joint with 2 keels, one 

 acute and the other subacute apical ly, 6th joint of the same shape as 

 that of L. purus, but palm concave in basal half, distal half bearing 

 8 teeth, the first acutelv triangular, the second obtusely cylindrical, 

 the third largest, broad, denticulate, finger equal to palm, stout, nearly 

 even in width throughout, palm well furnished with plumose setae. 



Third to fifth peraeopods, 2nd joint with hind margin spinose, not 

 keeled or produced. 



Uropods and telson as in L. purus. 



Length : 5 mm. 



Colour : In spirit, pale pinkish. 



Locality: Seal Island SW. ^ S., distant mile (False Bay). 

 11 fathoms. 1 <$ . s.s. " Pieter Faure." 12/11/02. (S.A.M. No. 

 A2779.) 



This species is unique in having 3 teeth on the palm of the 2nd 

 guathopod, all the other species of the genus having only 2. 



LAETMATOPHILUS DURBANENSIS n. sp. 



Very similar to L. purus. Peraeou transversely rugulose though 

 not very distinctly ; wider in $ than J , being nearly circular in the 

 former. 



First gnathopod quite distinct from that of L. purus in that the 6th 

 joint is not at all widened, is narrower than 5th joint and shows no 

 differentiation of hind margin and palm, the inferior margin bearing a 

 few feebly plumose setae ; the finger is quite smooth, but bears a 

 short, stout spine on the inner apex at the base of the unguis. Similar 

 in both sexes. 



Second gnathopod J , 2nd joint with 2 keels on anterior margin, 

 both apically acute, 4th apically subacute, 6th ovate but shorter and 



