CRUSTACEA NORTH PACIFIC EXPLORING EXPEDITION 



221 



and hairy, the spines long, erect, subequal, and acute, the hair fine, 

 long, and clean, two or three times as long as the spines. Carpus of 

 the right cheliped not longer than broad, but slightly longer than the 

 palm of the hand ; its postero-exterior slope smooth ; its antero- 

 interior corner spinous ; hand slightly convex, regularly covered with 

 spines arranged in eight longitudinal series, those of the outer mar- 

 gin longer, pectiniform, curving upward; fingers depressed, shorter 

 than the palm, and with acuminate corneous tips; spines on outer 

 margin of dactylus long and pectiniform. In the left cheliped the 

 carpus has two longitudinal rows of spines above, separated by a 

 smooth, flattened space ; hand convex, spinous, with the median 

 spines longest; fingers nearly devoid of spines. Ambulatory feet 

 stout, overreaching the chelipeds; last three joints broad, long- 

 ciliated above; dactyli compressed, very broad, not contorted, with 

 the sides longitudinally grooved, the upper edge and inner side 

 hairy, and the inferior margin armed with a series of ten black 

 corneous spines ; unguicle or tip stout and sharp, black. Dactylus 

 of fourth pair of feet large, reaching much beyond the hand-process, 

 and with a sharp, curved, black unguiculus. Length of the animal, 

 three inches ; length of carapax, 0.7 ; breadth of front, 0.34 ; length 

 of greater cheliped, 1.42 inch. 



It has nuich general resemblance to B. constaiis, but is easily dis- 

 tinguished by its shorter chelipeds, broader hairy dactyli of the am- 

 bulatory feet, and much larger dactylus of the fourth pair of feet. 



Found at Hakodadi, Japan. 



340. EUPAGURUS TRIGONOCHEIRUS' Stimpson 



Pl.^te XXVI, Fig. 2 



Eupagiu-Hs trigonocheirus Stimpson, Proc. Acad. Nat. Sci. Phila., x, p. 

 249 [87], 1858. 



This is a large species, allied to B. pubescens, but having more 

 strongly marked characters. The characters mentioned in the fol- 

 lowing description are those in which it is observed to differ from 

 that species. 



The body and feet are more or less hirsute, in some individuals 

 densely so, in others very little so, with the chehpeds nearly naked. 

 The chelipeds are granulated ; granules on carpus spiniform. Right 

 hand less than twice as long as broad. Right carpus very thick and 

 broad, broader than the hand, and shorter than in B. pubescens. 



^ Pagiiriis trigonocheirus (Stimpson). 



