282 Major A. Alcock and Capt. A. E. S. Anderson on 



minal segment only occupying about \ the dorsal length of 

 the segment ; the absence of the longitudinal furrows onthe 

 sides of the abdominal segments ; the shortness of the sixth 

 segment ; and a different branchial formula. 



One specimen ( ? ), measuring 160 miliim. from tip of 

 rostrum to end of broken telson, was caught at Station 219, 

 550 fathoms. 



Benthesicymus, Spence Bate. 



Benthesicymus investigator is, sp. n. 



This species is very closely allied to Benthesicymus Bartletti, 

 S. I. Smith, agreeing with it except in the following points: — 

 the dactylus of the external maxilliped is truncated, but 

 terminates in a pair of small curved spines apparently func- 

 tioning as pincers ; the fourth abdominal segment is carinated 

 in its posterior three quarters ; and the long slender spine is 

 absent from the fifth abdominal tergum. 



Station 222, 400-200 fathoms, 2 $ , 1 ? . 



Station 228, 640 fathoms, 1 ?. 



Station 234, 498 fathoms, 1 <J , 1 ? . 



Station 235, 370-419 fathoms, 1 ? . 



Family Crangonidse. 

 Pontocaris, Spence Bate. 



Pontocaris media, sp. n. 



The only points in which this species disagrees with the 

 description and figures of Spence Bate's Pontocaris pennata 

 ('Challenger' Crustacea Macrura, p. 499, pi. xci.) are the 

 following : — 



(1) The rostrum is pointed, not bifid at tip. 



(2) The infero-lateral carina on either side is bluntly and 

 evenly serrated, not smooth. 



(3) The eyes are very much smaller, the orbital notch is 

 more pronounced, and the tooth at its outer angle much 

 larger — the condition of parts being like that of Pontocaris 

 propensalata (Spence Bate, op. cit. p. 496, pi. xc. fig. 2). 



(4) The wing-like processes of the antero-lateral angles of 

 the carapace are not quite so oblique. 



(5) As in P. propensalata, the fifth, sixth, and seventh 

 thoracic sterna are longitudinally carinated. 



(6) The antennal scale is short and subcircular, somewhat 

 as in P. propensalata. 



