REPORT ON THE ANOMURA. 175 



like the chelipcdes glabrous, with a series of delicate spines articulated to the posterior 

 margin of the propodi ; the dactyli are short and strongly curved, with numerous spinules 

 on the posterior margin, which increase in size and are separated by wider intervals 

 towards the apex of the joint, in some cases also the dactyli are pubescent. The 

 antennal acicle extends slightly beyond the tip of the eye-stalk, and almost to the end 

 of the antennal peduncle ; the flagellum is not equal in length to the carapace. The 

 joints of the external maxillipedes are smooth. The abdominal segments are smooth 

 and glabrous externally. 



From the dredgings of the " Blake " it would appear that this species is common in 

 the West Indies, it having been taken by that vessel at no less than eighteen stations, in 

 depths varying from 88 to 734 fathoms. It was found in most of these cases adhering to 

 Corals of the genus Chrysogorgia. 



Uroptychus insignis, Henderson (PI. XXI. fig. l). 



DiptychtLS insignis, Henderson, Aun. and Mag. Nat. Hist., ser 5, voL xvi. p. 419, 1885. 



Characters. — The surface of the carapace is smooth and glabrous, with a moderate 

 convexity from side to side. The gastric area is crossed in front by a transverse row of 

 short, stout spinules, chiefly arranged in two groups one on either side of the middle line ; 

 the remaining areas are unarmed. The rostrum is about four times the length of the 

 eye-stalks, and its apical half is slightly upturned ; two minute spinules are present on 

 each lateral margin towards the apex, and the whole lower surface as weU as the distal 

 end of the upper surface bears a median carina. The lateral margin of the carapace is 

 armed with two spines of moderate size on its anterior half, one being situated at the 

 antero-lateral angle, and the other opposite the gastric row of spinules, with a few spines 

 of smaller size intervening, while the posterior half is provided with a regular series, 

 decreasing gradually in size from before backwards, and continued almost to the posterior 

 limit. The posterior margin is regularly convex, with the convexity directed forwards. 

 A few minute spinules occur on the anterior pterygostomial region. 



The chelipedes are robust and of moderate length, with the proximal joints tuberculate 

 and spiny. The merus and carpus are both armed with prominent spines at their distal 

 ends, as also is the inner surface of the former joint, while their surfaces, but especially 

 the upper one, are roughened by somewhat pointed tul^ercles which are mostly arranged 

 in rows. The propodus is glabrous, and its upper surface is provided with indistinct 

 tubercles, chiefly towards the proximal end ; the fingers are more than half the length of 

 the palm, their apices cross one another and are acute, while each in addition to having 

 its inner margin finely serrated bears a single ill-defined tooth of moderate size. The 

 ambulatory limbs are rather stout, and comparatively smooth, a few indistinct spinules 

 being merely present on the anterior margin of the meral and carpal joints, and a rounded 



