MUSEUM OF COMrARATIVE ZOOLOGY. 185 



pleurae 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 s])iny 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 antennae 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 setse, 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 antennae, 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 antennae 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 imarmed, 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 Eendiis, XCTII. 934, 

 figured in Recueil de Figures de Crustaces nouv. ou pen connus, f® livr.) it diflers 

 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 



