THE COPEXHAGEX MUSEUM AND OTHER SOUKCES. 39 



Fh'st and second gnathopods. Tliere are numerous spines of vai'ious sizes on and near 

 the margins. On the hind margin of the wrist and hand, commencing at the narrowed 

 distal end of the wrist, is a series of short spines which are plumose. The setules on the 

 inner margin of the fingers are exceedingly small. 



First and second perceopods. The fifth joint longer than the fourth or the sixth; 

 the second pair rather longer than the first, and further distinguished by having the hind 

 margin of the sixth joint fringed with about a dozen short blunt spines. 



Third perceopods. Second joint very slightly expanded, fourth joint the longest ; finger 

 slender, acute. 



Fourth perceopods like the third, but with rather longer joints. 



Fifth perceopods considerably longer than the fourth, the second joint expanded above, 

 narrowing dovrnward, fourth joint very long. Branchial vesicle small, narrowly oval. 



Telson much longer than broad, cleft thi-ee-fourths of the length, dehiscent, with a 

 spinule at each apex and a setule on each lateral margin. 



Length not quite a third of an inch. 



Kah. South Pacific, lat. 37° 29' S., long. 83° 7' W. Taken by H.M.S. ' Challenger,' in 

 tow-net at trawl, from a depth of 1775 fms. 



Fam. EUSIRIDJi;. 



EusiROPSis, n. g. 



Head distinctly rostrate ; body Avithout dorsal projections ; side-plates of perteon 

 shallow. Antennte of male with calceoli on peduncle and flagelluui in both pairs ; first 

 antennae shorter than the second, secondary flagelluui one-jointed : the second antennae 

 of male with the last joint of the peduncle very elongate. Mouth-organs nearly as in 

 Eitsirus, but the mandibles have the molar feebly developed and the first maxillse have the 

 second joint of the palp narrower and scarcely longer than the first. Gnathopods nearly 

 as in Eitsirus, but with the backward projection of the carpus almost obsolete. Eirstand 

 second peraeopods slender, with the finger ending obtusely and tipped with long setoe. 

 The three following perajopods slender, elongate, plumose, with the fingers acute. The 

 uropods of the first two pairs with outer branch much shorter than inner, the third pair 

 very plumose in the male, the outer ramus shorter than the inner. The telson narrow, 

 apically incised. 



EusiROPSis RiiSEi, n. sp. (Plates 13, 14.) 



Head Avith triangular rostrum longer than broad ; second, third, and fourth the 

 shortest of the peraeon-segments ; first three segments of pleon large, with the postero- 

 lateral angles rounded, hind margin not serrate. 



Eyes to all appearance entirely wanting. 



First antennce. Eirst joint rather bulky, carrying eight tufts of setules on the lower 

 margin ; second joint rather shorter and much narrower than the first, with calceoli 

 along the lower margin ; third joint almost like a joint of the flagelluui ; the latter rather 



