CRUSTACEA NORTH PACIFIC EXPLORING EXPEDITION 229 



ably developed. Feet naked or nearly so. Chelipeds shorter than 

 the ambulatory feet; the right one but little larger than the left; 

 hand in both with three sharp, denticulated longitudinal keels or 

 crests, two marginal, and one median one continued on the immova- 

 ble finger; carpus slightly pilose, flattened or obsoletely grooved 

 above, with two slight crenated keels. Ambulatory feet very slen- 

 der, naked ; dactyli not contorted, and much longer than the penult 

 joint. Colors: Body dark brownish in front, paler posteriorly; feet 

 transversely banded with reddish and olive; chelipeds white. Gen- 

 eral length of the animal, half an inch; length of the carapax, o.ii ; 

 breadth of the front, 0.07; length of the right cheliped. 0.17 inch. 

 Dredged in five fathoms, black sand, in Kagosima Bay, Japan. 



350. EUPAGURUS ACANTHOLEPIS ' Stimpson 



ISupagurns acantholcpis Stimpson, Proc. Acad. Nat. Sci. Phila., x, p 251 

 [89], 1858. 



Of this species we have only a small female specimen, perhaps 

 young. The rostriform tooth is obsolete. The ophthalmic ring is 

 shielded above by a bifurcated bracteole. The eyes are slender, and 

 overreach the peduncles of the antennae, equaling in length the 

 breadth of the front, and curving outward ; cornea not dilated ; 

 ophthalmic scales small, bidentate or bifurcated; teeth or forks spini- 

 form. Flagellum of antennae shorter than the feet. Acicle very 

 small. Feet slender, sparsely hirsute with long hairs. Chelipeds 

 slender, but much shorter than the ambulatory feet, and spinulose 

 above ; the right one largest ; carpus somewhat grooved above ; hands 

 a little depressed, and armed with a median and two marginal rows 

 of spines ; spines of the left cheliped longest. Dactyli of the ambu- 

 latory feet not contorted, but compressed, almost falciform; un- 

 guicles slender. Fourth pair of feet not didactyle ; penult joint ex- 

 panded. On the right side of the abdomen near its base there is a 

 conical process, the skin of which at its apex is somewhat indurated 

 or corneous. Length of the animal, about one inch ; length of cara- 

 pax, 0.21 ; breadth of front, 0.12 ; length of eye, 0.12 ; length of right 

 cheliped, 0.35 ; of the right ambulatory foot, 0.53 inch. 



This species, as will be seen from the description, presents some 

 peculiarities which may require its subsequent removal from the 

 genus Bupagurus, although it has most of the more essential charac- 

 ters of that genus — the remoteness of the external maxillipeds, etc. 

 It is desirable that the male should be examined. 



Dredged in eight fathoms, mud, in Port Jackson, Australia. 



^ Pagurus acantholepis (Stimpson). 



