190 BULLETIN OF THE 



flat, lightly granulated. The rest of the upper surface of the carapace has a 

 coarser granulation. There is a conspicuous hooked tooth on the third and the 

 fourth abdominal segment, and in some specimens there, is a rudimentary one 

 on the second and the fifth segment ; the teeth on the third and fourth seg- 

 ments have denticulated margins in adult specimens ; abdominal pleura? long 

 and narrow. Chelipeds very long, lightly tuberculate ; chela long, slender, 

 fingers rather short, smooth, with straight denticulated prehensile margins. 

 The meri of the ambulatory legs granulated, superior border produced to a 

 keel, the edge of which is entire ; the lower margin of the meri is also en- 

 tire ; the carpi have three tuberculated ridges, one superior, two external ; the 

 propodi are lightly tuberculated ; dactyli smooth, their hind margin armed 

 with about five teeth. Eye spineless, nearly hidden under the rostrum. An- 

 tenna? shorter than the carapace, first, third, and fourth joints armed with an 

 external spine. 



Length, 30 mm. ; carapace, 16 mm.; breadth, 9.5 mm.; rostrum, 5 mm.; 

 cheliped, 40 mm.; merus, 13 mm.; carpus, 4.5 mm.; propodus, 17 mm.; 

 dactylus, 7 mm. 



Station 3353. 695 fathoms. 2 males, 1 female ovig. 



Near M. longimana (Elasmonotus longimanus A. M. Edw.), from which it 

 differs in having the rostrum more nearly plane, the merus of the cheliped 

 much less strongly tuberculated, the meri of the ambulatory limbs more 

 strongly carinated, with lower margin entire instead of denticulate ; the spine 

 on antennal peduncle is more prominent, while the tooth on the second seg- 

 ment of the abdomen is absent or at best rudimentary. 



Two specimens (male) of Elasmonotus longimanus A. M. Edw., and one 

 (female) E. brevimanus A. M. Edw., have been returned to Cambridge from 

 Paris. I suspect that these may prove to be the male and female of one 

 species. The chelipeds of the female specimen of M. cristatipes are lost. 



Munidopsis hendersoniana, sp. nov. 



In this species, as in M. armata (Elasmonotus armatus A. M. Edw.) and 

 M. marginata (Elasmonotus marginatus Hend.), the lateral margins of the 

 carapace are extended as sharp crests overhanging the sides of the body. The 

 upper surface of the carapace is rather flat, and is clothed with a close short 

 pubescence ; the sides are nearly parallel. The rostrum is long, acute, nearly 

 horizontal, the upper surface roof-shaped. There is an acute tooth on the 

 anterior margin of the carapace external to the eyestalk and another at the 

 antero-lateral angle ; otherwise the carapace is unarmed. The eyestalks are 

 immovable and prolonged into a long horn one half as long as the rostrum; 

 seen from above, the eyestalks appear like lateral spines of the rostrum. 

 The eye is rudimentary, occupying the basal part of the lower side of the 

 peduncle. The antenna? are shorter than the body, the basal joint armed with 

 a well developed inferior spine. The chelipeds are short robust and tomen- 



