174 BULLETIN OF THE 



spines occurring along the superior border ; the hand is both spinulose and 

 pubescent, but the hair is less dense upon the fingers than upon the basal 

 portion of the hand, which is short and swollen below ; the fingers are 

 short, excavated within, and terminate bluntly in a dark corneous nail. The 

 ambulatory limbs are pubescent, particularly on the upper and lower mar- 

 gins ; the distal end of the merus, and also the carpus, propodus, and dac- 

 tylus, are armed with numerous spines; the most prominent of these spines 

 are arranged in a row along the upper border of the carpus and propodus ; the 

 dactylus is about equal in length to the propodus and carpus together. The legs 

 of the fourth pair are furnished with long hairs on their upper margin, and 

 there are a few spines on the upper margin of the carpus ; the propodus is 

 rather longer than the dactylus, and the rasping surface on its lower margin 

 occupies two thirds of its length. The last pair of legs is much less hairy 

 than the preceding pair; the rasping surface, which is truncate posteriorly, 

 falls a little short of reaching the middle of the hand. The telson is divided 

 by a pair of lateral incisions and a median one into four lobes, those on the 

 left side the larger ; the pair of terminal lobes are obscurely toothed on their 

 margins. 



Length of carapace, 9.5 mm. ; breadth, 7 mm. ; length of ocular peduncle, 

 4 mm. 



Station 3368. 66 fathoms. 2 females ovig. 



This species is nearly related to P. lymani A. M. Edw. et Bouv., 1 of the 

 West Indian region, and to P. subpilosus Hend., 2 of New Zealand. From the 

 former it is distinguished by the more prominent and acute rostrum which 

 overhangs the ocular segment, by the smaller number of spines on the antennal 

 acicle, and by the armature of the telson, the margin of which is ornamented 

 with obscure teeth, while in P. lymani it is furnished with numerous spines 

 whose tips are horny and dark colored. From P. subpilosus it differs in having 

 shorter eyestalks and antennal acicle, fewer spines on the antennal acicle, a 

 longer and narrower external prolongation of the second joint of the antenna, 

 and a differently shaped telson. 



The ovisacs of both specimens are large and filled with eggs. 



Family PORCELLANID-ffi. 



Petrolisthes agassizii, sp. nov. 



In the shape of the carapace and the front this species bears a close resem- 

 blance to Petrolisthes sexspinosus (Gibbes) and P. occidentalis Stimps., but the 

 transverse ridges are more broken anteriorly, while posteriorly they extend 

 without interruption across the whole width of the carapace, being here more 

 perfectly developed than in the two species above named. The carpus and claw, 



i Mem. Mus. Comp. ZoSL, XIV. No. 3, p 49, Plate IV. Figs. 13-22, 1893. 

 2 Challenger Anomura, p. 77, Plate VIII. Figs. 2, 2 a, 1888. 



