{ 137 ) 



it differs from it entirely in the number of the gill-plumes and form of the gill- 

 lilaments, in the presence of a well developed Hagellam to the palp of the ist 

 maxilte, in the tendency of the chelipeds to be subequal, and in having the 

 finger-tips extensively corneous. 



Tomopaguropsis is also closely related to Eupa^zirus, from which however 

 it differs in all the points just mentioned, and in the possession by the male 

 of a pair of appendages on the first abdominal segment. 



At present only two species of this genus are known, namely, Tovio- 

 pa^uropsis problematica (= Eupagtirus ? problematicus, Edw. and Bouv.) from 

 the West Indian region, 125 to 288 fathoms, and T. lanata, here described, 

 from off the west coast of India and Ceylon, 142 to 400 fathoms. The 

 restriction of this singular and somewhat generalized form to the sublittoral 

 zones of the West Indies and of the Indian Peninsula is one of those 

 remarkable facts of distribution that I have already sufficiently emphasized. 



I. Tomopaguropsis lanata, n. sp. Plate XIII., fig. 4. 



Carapace very thin except in the well-calcified gastric region and in 

 certain parts of the edge of the cervical groove : even the cardiac region, 

 though better calcified than other parts behind the cervical groove, is thin. 

 Rostrum and antennal angles of carapace broad but acute, the rostrum 

 slightly the more prominent. 



Eyestalks moderately stout, slightly broadened distally, dorsally setose, 

 surpassing to no very great extent the penultimate joint of the antennular 

 peduncle and reaching nearly to the middle of the terminal joint of the 

 antennal peduncle. Eyes very black, ophthalmic scales long, stout, dorsally 

 inflated, acute. 



Outer angle of 2nd joint of antennal peduncle produced as a long, stout 

 setose spine : antennal acicle stout, curved, reaching to end of peduncle, 

 its inner border strongly setose: flagellum setose, more than i^ times 

 length of carapace. 



The exposed extensor surfaces of the chelipeds and legs are very hairy, 

 but not so thickly so as to entirely conceal the surface sculpture. 



The chelipeds are similar in form and in details of sculpture, but the 

 right, though not much longer, is somewhat larger. 



The right cheliped is a little more than twice the length of the carapace : 

 the trigonal merus is as long as the trigonal carpus, and except for a few 

 transverse ripplings on its upper face and a few granules or spinules on its 

 lower face, is smooth : the carpus is longer than broad and longer than the 

 palm; its inner border is spinose, and there are numerous spinules and 

 granules on the lower part of its outer surface, but a shallow groove parallel 

 18 



