198 Canon A. M. Norman on British Amphipoda. 



rows of setaB ; the setae in one of these rows are verticillately 

 plumose, in the other simply plumose. 



The basal lobe of the maxtlUped (fig. 8) widens distally 

 and the extremity is rather oblique and tlexuous ; a row of 

 setge is situated on the middle of the lobe ; the masticatory 

 lobe is remarkable for its great breadth and widely rounded 

 extremity, the inner margin is faintly crenulated, the outer 

 and distal margins are set round with simple setas at nearly 

 equal intervals ; the palp is stout, its terminal nail strong, 

 the antepenultimate joint just overtops the masticatory lobe. 



The gnalhopods have the coxai small and almost entirely 

 concealed by the overlying coxa of the first peraeopod. Both 

 pairs of gnathopods (figs. 9 & 10) closely resemble those of 

 C. tahitensis, but the first pair are much more stoutly built 

 than in tliat species. 



The perccopods with their coxas (figs. 11 & 12, coxae of 

 second and third pair) are in close agreement with those of 

 the type. A comparison of fig. 18 of the last peraeopod with 

 Stebbing's figure of the same limb in C. tahilensis shows the 

 remarkable resemblance, seen even in the hinder margin of 

 the basos, which in the lower portion is slightly concave and 

 devoid of the serrations which are present in the upper portion 

 of the margin. 



The third segment of the metasome has the hinder corner 

 of the epimera slightly produced and pointed (fig. 14). 



The first segment of the urosome has a dorsal sinus. The 

 second uropods are longer than the first, but do not reach to 

 more than half the length of the rami of the largely developed 

 last pair, which have their rami fully twice as long as their 

 peduncle: the outer branch is two-jointed; its inner margin 

 bears four or five sm.all spinules, and under a high power the 

 margin itself is seen to be delicately serrulated. The telson 

 (fig. 15) is narrow, very long and produced, and cleft almost 

 to the base ; it extends beyond the extremities of the first 

 and second uropods. 



Length 19 millim. 



Two specimens taken by Sir John Murray in the ' Triton ' 

 Expedition of 1882, Stat. 8, Faroe Channel, lat. 60° 18' N., 

 long. 6° 15' W., in 640 fathoms, temperature 30° Fahr. 



The features which distinguish this species from the type 

 are chiefly the more robust character of the first gnathopods 

 and the form of the hinder margin of the third segment of 

 the metasome.] 



