REPORT ON THE ANOMURA. 177 



end of the merus, while the minute tubercles are best marked on the merus and carpus. 

 The propodus is glabrous, and its surface is minutely punctate ; the fingers are scarcely 

 half the length of the palm, with their surface slightly pubescent, and a single ill-defined 

 tooth is present on the inner margin of each. The ambulatory limbs are slender, more 

 particularly the first, and the joints are glabrous, though slightly pubescent ; the meral 

 joints are finely tubercular, and numerous distinct spinules are present on their anterior 

 margin ; the propodi, as well as the dactyli, are slightly curved, and a series of minute 

 horny spinules is present on the posterior margin of the latter. 



The eyes are of small size and partially concealed in orbits, with the cornese but 

 slightly dilated. The antennal acicle is of very small size, only reaching the end of 

 the eye-stalk, and scarcely the middle of the last joint of the antennal peduncle. The 

 external maxillipedes are smooth, one or two minute spinules being alone present at the 

 distal end of the merus. 



The abdominal segments are glabrous externally, though minutely punctate, and the 

 fifth and sixth are in addition ^jubescent in some specimens ; their pleura are suboljtuse. 



This species agrees with the West Indian Uroptychus armatus (A. Milne-Edwards) in 

 having the carapace armed laterally with prominent spines, but in the latter species from 

 seven to eight of these are present, and the ambulatory limbs are in addition smooth. 



Breadth of carapace, not including spines (of a female with ova from Station 170) 

 7 mm., length of body (including rostrum) 22 mm., of carapace (including rostrum) 

 11 mm., of chelipede 29 mm., of chela 12 mm., of first ambulatory leg 13 mm., 

 diameter of ova about. 1 mm. 



Habitat. — Station 170, ofl:' the Kermadec Islands; depth, 520 fathoms; bottom, 

 volcanic mud. A female with ova, and a young male. 



Station 214, south of the Philippines; depth, 500 fathoms; bottom, blue mud. 

 Two females, both with ova. 



Uroptychus parvulus, Henderson (PI. XXI. fig. 3). 



Diptychus parvidus, Henderson, Ann. and Mag. Nat. Hist., ser. 5, vol. xvi. p. 420, 188.5. 



Characters. — The carapace is slightly more convex than usual, and is everywhere 

 smooth and glabi'ous, though a few minute punctations are visible on its surface. The 

 rostrum is about half the length of the carapace, or four times the length of the eye-stalks, 

 and slightly depressed, with its upper surface hollowed out from side to side, and thp 

 margins entire. The lateral border of the carapace is armed with a series of very minute 

 spinules which are best marked towards the posterior limit. The pterygostomial region 

 is provided with a few scattered granules. 



The chelipedes are elongated and of moderate width, with the proximal joints finely 

 spinose. The merus and carpus are each armed with numerous rows of short spinules, 



(ZOOL. CHALL. EXP.^PAET LXIX. — 1888.) Zzz 23 



