REPORT ON THE ANOMURA. 163 



end. The ischium and merus of the external maxillipedes arc finely granulated externally, 

 and the latter joint is armed with two large triangular teeth on its inner margin, one of 

 which is placed near the distal end, while a third is present at the distal end of the outer 

 margin. 



The abdominal segments are finely granular externally, and the second, third, and 

 fourth are each provided with two faint transverse carinse. 



This species is characterised by the comparative smoothness of its carapace and limbs, 

 and by the form of the meral joint of the external maxillipedes. I have associated it 

 with the name of my friend Mr. E. J. Miers, late of the British Museum staff, well 

 known as the author of a large number of carcinological memoirs. 



Breadth of carapace 5 mm., length of body (including rostrum) 15 mm., of carapace 

 (including rostrum) 8 "2 mm., of chelipede 17 mm., of firet ambulatory leg 11 mm. The 

 single specimen is a male, probably not fully grown. 



Habitat. — Station 173, off Matuku Island, Fiji; depth, 315 fathoms; bottom, coral 

 mud. 



Elasmonotus asper, Henderson (PI. XIX. fig. 4). 



Elasmonotus asper, Henderson, Ann. and Mag. Nat. Hist., ser. 5, vol. xvi. p. 416, 1885. 



Characters. — The carapace is remarkably flattened, and the regions are not clearly 

 defined ; the surface is dotted with irregular tubercles, some of which are subacute, and 

 the intervening spaces are finely granular. The gastric area is but slightly raised above 

 the surrounding level, and the tubercles are prominent (some are even compound) towards 

 the median line ; the tubercles are most numerous elsewhere towards the lateral and 

 posterior margins of the carapace, and two of large size are situated on the cardiac 

 area, overhanging a shallow transverse groove. The rostrum is moderately narrow, and 

 usually about twice the length of the eye-stalks, though in some male specimens it 

 scarcely exceeds these in length ; the apex is slightly upturned, and bidentate, the upper 

 and larger of the two teeth being in most cases again subdivided ; the upper surface is 

 finely tubercular, and in some cases a few serrations are present on the lateral margins 

 towards the apex. The lateral margin of the carapace is irregular in outline, but without 

 any spines of importance ; a small serrated lobe is present on the orbital border behind 

 the ocular peduncle ; the posterior margin is narrow and finely tuberculate. 



The chelipedes are narrow and elongated, while the joints, more particularly the 

 meri, are armed with short tubercular spines. The propodus is about three times the 

 length of the carpus, and its upper surface bears a median row of tubercles ; the fingers 

 are not equal in length to the palm, and slightly pubescent, their opposed margins 

 are dentate (the dentations being more strongly marked towards the apices) and a 

 slight basal hiatus is usually present between the two. The ambulatory limbs are of 



