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



on either side; the longer ramus carrying spines on botii margins, but none near the 

 apex, the shorter ramus with spines only on one margin ; the peduncles of the second 

 pair shorter than the rami, with some slender spines on the margins, and a shorter, stout, 

 somewhat curved one at the apes ; the rami not very unequal in length, with a few 

 spines near the centre of the margin ; peduncles of the thii'd pair much shorter than 

 the rami, with several spines about the apex ; the upper and inner ramus shorter than 

 the lower, broad at the base, but tapering to a sharp point which is formed by an 

 apical spine, its only armature ; the lower and outer ramus ending in a long nail, with 

 a spine on either side of its base ; this ramus has three other spines on the outer margin 

 a,nd one other on the inner, not far above the base of the nail. 



Telson. — Not reaching to the end of the peduncles of the third uropods ; breadth 

 at the base rather greater than the length ; cleft nearly to the root, not dehiscent ; sides 

 converging to the broad apices, each of which has a couple of cilia on the outer part 

 which is not carried back quite so far as the inner ; there are two other unequal cilia on 

 the surface near the outer margin not halfway down. 



Length. — The specimen, a female, in the position figured, measured a quarter of an 

 inch. 



Locality. — Kergueleu. Four specimens, to two of which the depth assigned was 

 120 fathoms, and to one 30 fathoms ; the depth at which the other was taken not 

 being sjiecified. 



Remarhs. — The specific name, from 6btusus,\ibxa.t, a,\idi frons, forehead, refers to the 

 breadth of the rostral portion of the head. 



There is a strong general resemblance between this species and LLarpinia plumosa, 

 Kr0yer, but it differs from that species in numerous details ; for examj)le, the outer 

 plate of the maxillipeds has many more teeth, and the telson is not cleft quite to the 

 root. 



Genus Urothoe, Dana, 1852. 



1852. Urothoe, Dana, Amer. Journ. Sci. and Arts, ser. 2, vol. xiv. 



1852. ,, Dana, U.S. Explor. Exped., vol xiii. pt. ii. pp. 90S, 920. 



1863. Egidia, Costa, Eend. d. Soc. r. Borb. Acad. d. scieuze. 



1857. „ Costa, Eicerche sui Crest. Amfip. Nap., pp. 174, 190. 



1857. Sulcator (pars), Spence Bate, Synopsis, Ann. and Mag. Nat. Hist, ser. 2, vol xix. p. 9,i 



1857. „ White, Popular Hist. Brit. Crust., p. 175. 



1857. Urothoe, Spence Bate, Synopsis, Ann. and Mag. Nat. Hist., ser. 2, vol. xix. p. 14.i 



1857. „ White, Popular Hist. Brit. Crust., p. 186. 



1860. „ Boeck, Skand. Naturf. 8de M0de, p. 646. 



1862. „ Spence Bate, Brit. Mus. Catal. Amph. Crust., p. 114. 



^ This is the paging of the separate copies. , . 



