SontJi African Crustacea. 95 



rostris, but has the margins feathered with setae for nearly two- 

 thirds of the length from the apex ; the latter is acute and appears 

 to have a very small pair of spines at its base, the main body of the 

 telson has two pairs of dorsal spines, not quite symmetrically placed 

 in the specimen figured. 



The eyes are cylindrical, with a rather srnall corneal area. 



The first joint of the first antennae has a tooth at about the middle 

 of one margin ; the much shorter second joint is decidedly longer 

 than the third ; the flagella are about as long as the body and sub- 

 equal in length, the upper one at the base being considerably the 

 broader, a thicker part indicative of 28 jointlets being accompanied 

 by a thinner part, about half its width, which carries some 56 groups 

 of filaments, only the rounded apex of this portion being free. The 

 division into jointlets along this apparently composite part of one 

 fiagellum and along the corresponding portion of the other depends 

 rather on marginal constrictions than on any definite articulation. 

 The second antennae have a flagellum considerably longer than the 

 body, the rounded apex of the scale reaching well beyond the strong 

 tooth of the outer margin. 



The character of the mandibles has been in part explained above. 

 The part which may perhaps function as an incisor process 

 extends in one mandible all across the end of the molar in three 

 large teeth, the largest fringed with setules ; in the other the extent 

 is smaller and the edge divided into five teeth of various sizes, 

 the setaliferous band of the molar being here accompanied by an 

 irregular strip of three blunt teeth. 



The lower lip shows two broad lobes with rather irregular out- 

 lines. The first maxilla has a bilobed apex, the inner lobe the 

 larger with one long spine among others that are seta-like. The 

 second maxilla has its vibratory plate more flat-topped than usual. 

 The third maxilliped ends in a strong apical spine, the exopod 

 extends along two-thirds of the antepenultimate joint, and a small 

 epipodal plate is setiferous on its anterior margin. 



The first peraeopods are short, the fifth joint rather shorter than 

 the fourth or sixth, the movable finger as in E. ensirostris scarcely two- 

 thirds the length of the palm. The more slender but longer second 

 peraeopods have the wrist in each limb divided into 12 jointlets, of 

 which the first is the longest, the last being next in size sub-equal to 

 the palm but longer than the fingers ; the fourth joint is very faintly 

 sub-divided into 4 compartments and equals in length the first 8 of 

 the wrist ; it is rather longer than the somewhat stouter third joint, 

 which is distinguished by a peculiar armament of 6 or 7 hooked 



