172 



STALK-EYED CRUSTACEA. 



^ 



] 

 V 



■3 





just behind the margin of the orbit, and extends to the posterior border of 

 the carapace, forming the upper boundary of the hepatic and branchial 

 areas. The antennal carina takes its origin in a strong spine on the anterior 

 margin of the carapace at the base of the second antenna, and runs backward 

 on the branchial region nearly to the hind margin of the carapace; it is con- 

 nected with the orbital carina by an oblique carina which divides the hepatic 

 from the branchial regions. Between the orbital and antennal carinsc, nearest 

 to the former, is a half-carina, which extends from the posterior margin of 

 the carapace forward to a point a little distance behind the branchio-hepatic 

 carina. Below the antennal carina are two more longitudinal carina) sub- 

 parallel with one another and with the inferior margin of the carapace ; 

 the uppermost of these does not quite reach the margin of the carapace at 

 either end; the lowermost begins at the antero-lateral margin, courses back- 

 ward as a submarginai carina, and is continuous posteriorly with the light 

 carina which rims along the posterior border of the carapace ; through this 

 medium it is continuous with its fellow on the opposite side of the carapace. 

 The infra-orbital angle is not spinous, but a short distance below it a small 

 acute spine occurs at the base of the antennule. The surface of the carapace 

 is corrugated, most emphatically in the field betwixt the dorsal and orbital 



carmEe. 



All the abdominal segments are carinated in the dorsal median line, and 

 the third, fourth, and fifth are armed with a posterior tooth ; the first and 

 second segments are notched posteriorly in the dorsal median line. The 

 telson is channeled on the dorsum, and furnished with about four pairs of 



dorsal, but no marginal, spines ; its tip is broken off and its armature thus 

 obliterated. 



The third maxillipeds and legs are moderately tomentose. The second 

 pair of legs are a little longer and slenderer than the first pair. The ischium 

 and merus of the last three pairs are spinulose on their inferior margins. 



Length, 127 mm. ; length of carapace, including rostrum, 61 rnm. ; height 

 of carapace, 31 mm. ; length of antennal scale, 19.5 mm. 



Station 3399. 1740 fathoms. 1 male. 



This species is nearly related to M patenMssimus Bate, with which it agrees 

 in nearly all the details of carinrc, etc. ; but it differs much from that species 

 in its general form and proportions, the carapace being much longer in pro- 

 portion to its height, and less convex along the dorsal line than in N. paten- 

 tissimus. The rostrum, too, is armed with many more spines on its inferior 



.1-1 '.- _ ^_^ 



