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 bears 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, 6.56 mm.; breadth of carapace, 
12 mm.; length of cheliped, 28 mm. 
Station 3393. 1020 fathoms. 3 males, 1 female (with Peltogaster). 
Nearly related to WM. edwardsii (Elasmonotus edwardsii 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 
earinate 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 pleuree 
are rounded. Ocular peduncle free, spineless. The peduncle of the antenna 
is also destitute of spines; the flagellum 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. 
