MUSEUM OF COMPARATIVE ZOOLOGY. 191 



tose; there is a spine at the distal superior angle of the ischium and another 

 near the distal end of the lower internal edge ; five spines along the superior 

 margin of the merus and two inferior distal spines ; the carpus hears a superior 

 proximal tooth together with three teeth on the distal margin ; the chela is 

 short and stout, the hand without teeth or spines; the fingers are very thick 

 and short, meeting one another only at their spoon-shaped denticulated tips ; 

 there is a rounded tubercle at the base of the inner margin of the immovable 

 finger ; the outer margin of this finger is denticulated. Ambulatory limbs : 

 five to seven spines on the superior and external inferior margins of the meri 

 (those on the superior margin the largest) ; upper edge of carpus three- to four- 

 spined ; propodi and dactyli unarmed. Abdomen without spines. 



Length, 37 mm.; carapace, 20 mm.; rostrum, 6.5 mm.; breadth of carapace, 

 12 mm.; length of cheliped, 28 mm. 



Station 3393. 1020 fathoms. 3 males, 1 female (with Peltogaster). 



Nearly related to M. edwardsii (Elasmonotus edivardsii Wood-Mason, Ann. 

 Mag. Nat. Hist., 6th series, VII. 201, 1891) of the Bay of Bengal, but easily 

 distinguished from that species by the lateral margins of the carapace, which 

 in Wood- Mason's species are divided into two lobes, but in M. hendersoniana 

 are entire. 



Munidopsis inermis, sp. nov. 



In this species the whole surface of the body and appendages is naked and 

 free from spines and tubercles. The carapace is rather flat above, with 

 subparallel sides ; the gastric region is protuberant and separated from the 

 hepatic and cardiac areas by conspicuous furrows. The surface of the carapace 

 is punctate and lightly granulate and rugose on the branchial regions. The 

 rostrum is triangular, blunt at the apex, bent strongly downward, and slightly 

 carinate above. The antero-lateral angle is rounded, and a rounded lobe 

 projects from the anterior margin above the base of the antenna. The 

 abdomen is smooth, naked, devoid of spines and ridges ; the abdominal pleurae 

 are rounded. Ocular peduncle free, spineless. The peduncle of the antenna 

 is also destitute of spines ; the fiagellum is wanting in the only specimen 

 obtained. The chelipeds are also missing. The ambulatory appendages are 

 smooth, unarmed ; the dactyli long (equal to the propodi in length), slightly 

 curved, acute at the tips. The appendages of the third, fourth, and fifth 

 abdominal segments are simple and rudimentary. The merus of the third 

 maxilliped is short, its antero-internal margin three-toothed ; the palpus of 

 this appendage is nearly as long as the merus and ischium combined. 



Length, 12 mm. ; carapace, 6 mm. ; breadth, 4 mm. 



Station 3354. 322 fathoms. 1 male. 



This species nearly resembles M. polita (Anoplonotus politus Smith), but 

 the carapace of the former is longer and narrower, the rostrum is curved more 

 strongly downward, and the propodi of the ambulatory limbs are much shorter 

 in proportion to the dactyli. 



