MUSEUM OF COMPARATIVE ZOOLOGY. 185 
pleur of this segment bear each a broad, flattened, forward-pointing tooth 
with denticulated edges; when the animal is viewed from above, this tooth 
appears to form the lateral extremity of the pleura, which really lies below it, 
and is rounded. Third abdominal segment: both ridges are spiny and dentic- 
ulate, three spines being specially prominent on each ridge. Fourth abdominal 
segment : armed with but one small median spinule. The sides of the carapace 
below the epimeral sutures are covered with spiny tubercles, and display an iri- 
descent lustre. The eye has two spines projecting over the cornea from the 
inner side; the posterior of these spines is very minute. The antenne are very 
slender and about as long as the carapace; the first and second joints are pro- 
vided with a prominent external spine, the third joint with three spines, viz. 
one external, one internal, and one superior. The chelipeds are absent in both 
the specimens. The ambulatory appendages are spinulose on all the segments 
except the dactyli, which are finely serrate on the hind margin. The legs, and 
more especially the sternum, are iridescent, like mother of pearl. This irides- 
cence is seen in a less degree in several other species of this genus. 
Length, 20 mm.; length of carapace, 11 mm. ; breadth, 7 mm.; length of 
rostrum, 3.5 mm. 
Station 3404, 385 fathoms. 1 male, 1 female. 
Munidopsis crinita, sp. nov. 
The whole surface is clothed with long sete, which are longest and densest 
on the chelipeds and ambulatory appendages: The rostrum is very broad at 
the base and ends in three points, the middle of which is the longest; the ros- 
trum is slightly carinate in the median line. ‘The carapace is roughened by 
low setiferous ridges. The antero-lateral angles are obliquely truncate; a spine 
over the antenna, and four on the lateral margin, the last one just behind the 
cervical suture, the third one obsolescent ; hind margin unarmed. A pair of 
spines on the gastric region, behind the base of the rostrum. The abdomen is 
devoid of spines, and there is no spine over the eye. The antenne are slender, 
shorter than the body; the basal joint is provided with a long spine on the 
external side, and another on the internal side; the second joint has an external 
spine, the third an internal one. Chelipeds : merus five-spined; carpus with 
one prominent spine; hand unarmed, broadest at base of fingers, cutting edges 
of fingers toothed. Ambulatory limbs setose, hind border of dactyli spinulose. 
Length, 19.5 mm.; carapace, 11.5 mm. ; rostrum, 2.6 mm. ; breadth of cara- 
pace, 7.5 mm. 
Station 3384, 458 fathoms. 1 female. 
This species resembles M. rosacea (A. M. Edw.), M. latifrons (A. M. Edw.), 
and M. tridens (A. M. Edw.). From the first (Comptes Rendus, XCIII. 934, 
figured in Recueil de Figures de Crustacés nowy. ou peu connus, 1% livr.) it differs 
in having a much shorter rostrum, in the presence of a pair of spines on the 
gastric region, in the different shape of the hand, the absence of prominent 
