690 THE VOYAGE OF H.M.S. CHALLENGER. 



border, the longer, which is the lower and inner, also with plumose setse and a con- 

 spicuous nail. 



Telson, in one specimen, female, not reaching the distal end of the peduncles of the 

 third uropods, in another specimen, male, reaching beyond them ; cleft not so far as the 

 centre, not dehiscent, a spine in each half of the apex, a feathered cilium on each side 

 about level with the top of the cleft, and two spines lower down. 



Length of female, in the position figured, one -fifth of an inch ; two other specimens 

 the same size ; two much smaller. 



Locality. — Station 149h, off Cumberland Bay, Kerguelen, Januar)^ 29, 1874; depth, 

 127 fathoms; bottom, volcanic mud. Five specimens. Dredged. 



Remarks. —The specific name alludes both to the general appearance of this 

 compact and rounded little species, and to the little bright spots looking like perfora- 

 tions in the integument, to each of which a microscopic cilium appears to be attached. 

 The figure of the third perseopod indicates this character. The species seems to have 

 some affinity with Boeck's genus Menigrates, but in that genus the mandibles are described 

 as very short, with a short palp, and the first gnathopods as very robust, with the hand 

 scarcely subcheliform. In Orchomene, which comes near to Menigrates, the hands in 

 question are very short, robust, longer than the triangular carpus. Ambasia has the 

 third joint of the lower antennje elongate, but was in other respects unsuitable. Lepide- 

 'pecreum seems to be the genus in which the present species can be most appropriately 

 placed. 



Genus Socarnoides, n. gen. 



Mandibles very elongate. 



Lower Lip with front and hind lobes outdrawn, narrow. 



First Maxillie having the inner plate devoid of plumose setse, and the second joint 

 of the palp without apical spine-teeth. 



MaxilUpeds with the inner and outer plates long, apically narrowed, the outer plates 

 extending far along the third joint of the palp, without teeth or nodules on the inner 

 margin ; palp narrow, second joint very long. 



Second Uropods witli the iimer branch incised. 



Telson little cleft. 



Remarks. — From Boeck's Socarnes (see Note on Boeck, 1870, p. 397) the present 

 genus difi'ers chiefly in the apically narrowed plates, both outer and inner, of the 

 maxillipeds, and the smooth inner margin of their inner plates, as well as in the 

 absence of setse from the inner plates and of teeth from the palps of the first 

 maxillae. 



