Indian Deep-sea Dredging. 263 



being inflated ; in the form of the teeth of the antero-lateral 

 margins of the carapace, the first of which is a rectangular 

 plate entirely separate from the extra-orbital angle, while the 

 two remaining are sharp and conical ; in its relatively longer 

 legs, which are setose at their extremities, with the dactylo- 

 podites of the last pair not much more expanded than those 

 of the preceding pairs ; in having the upper surface of the 

 carapace dull and minutely granulose, and the fingers of the 

 chelipeds black. 



One male and one female, juv., from Station 56, 240 to 

 220 fathoms. 



Length of carapace 8*5 milliin., breadth 11*7 millim. 



44. Sphenomerus trapezioides } gen. et sp. n., Wood-Mason. 



Carapace about 1^ times as broad as long ; its upper sur- 

 face is smooth, polished, and tolerably convex in all direc- 

 tions, but especially antero-posteriorly ; and it is devoid of all 

 grooves except two faint crescentic ones, which separate the 

 cardiac from the branchial regions. The deflexed and some- 

 what produced frontal margin is divided by a distinct notch 

 into two truncate-rounded lobes, and is without granules or 

 raised rim, as are also the entire upper and lower orbital 

 margins. The antero-lateral margins, which are only about 

 two thirds the length of the postero-lateral, form with the 

 frontal margin a semicircular outline ; each bears a minute 

 spine at the extra-orbital angle, followed at equal distances 

 by two smaller ones. There is also a small spine at the 

 internal infra- orbital angle. The basal joint of the antennas 

 is not much developed and the flagellum occupies the internal 

 orbital hiatus. The external maxillipeds have the mero- 

 podite slightly oblong, with the succeeding joint articulated to 

 its truncated antero-internal angle. The abdomen of the 

 male is six-jointed, the third and fourth segments being almost 

 indistinguishably ankylosed together. 



Chelipeds in both sexes extending far beyond the carapace, 

 massive, and of unequal size, the right being much larger 

 than the left; the fingers are broadly banded with black 

 across their middle, the palms are smooth, the wrist is rounded 

 and smooth, with a minute spine on its inner side; themero- 

 podite is wedge-shaped at its proximal end and bears six to 

 eight small spines on its thickened distal end, as in Trapezia. 

 Ambulatory legs weak and narrow, with the two terminal 

 joints articulated together and constructed as in Trapezia. 

 From Station 56, 240 to 220 fathoms. 

 Length of carapace 8*5 millim. ; breadth between last pan- 

 el" antero-lateral tubercles 11 millim. 



