CRUSTACEA NORTH PACIFIC EXPI.ORIXG EXPEDITION 215 



latory feet. Fingers of the hanrls slender, with acute margins 

 microscopically pectinated with sliort setse ; margin of immovable 

 finger also armed with eight minute distant teeth ; that of movable 

 finger smooth. Dactyli of the ambulatory feet very long and com- 

 pressed, adapted for swimming. The animal is of a pale fawn color 

 when alive ; sometimes slightly reddish. 



This species swims freely, even carrying its shell, by striking the 

 water with its ciliated feet. Our specimens were taken from a 

 muddy bottom in sixteen fathoms off the Chinese coast near Hong- 

 kong. 



Genus EUPAGURUS Brandt ^emended) 



In this genus and Spiropagurus we find a character of the external 

 maxillipeds which seems to be of considerable importance, although 

 overlooked by those who have previously written upon the family of 

 Paguridae. In all other genera these maxillipeds are closely approx- 

 imated at the base, the coxae being greatly dilated, with their inner 

 surfaces closely applied to each other. In the present genus the 

 coxa; are small, very short, and no larger than the second or basis- 

 joint of the maxilliped, being at the same time widely removed from 

 each other, showing between the prominent margin of the second 

 sternal segment, which is often armed with teeth or spiniform pro- 

 cesses. The exognath of the maxillipeds is broader than in the ordi- 

 nary forms of Paguridae. 



Other characters of Eupagurns are the following: Front acute at 

 the middle. Ophthalmic ring exposed, but without a bracteole or 

 indurated plate between the bases of the eyes. Aciculum of the 

 antennae elongated, slender even from the base; flagcllum long. Ex- 

 ternal maxillipeds rather large. Chelipeds dissimilar in form and 

 unequal, the right largest; commissure of the hand horizontal, with 

 the hinges marginal; fingers moving in a horizontal plane. Fourth 

 ])air of feet scarcely subcheliform. 



This genus inhabits the tem])erate and frigid zones of both hemi- 

 s]3heres. A large number of species is found, both in the Xortli 

 Atlantic and the Xorth Pacific Oceans. In two or three rare in- 

 stances si)ecies occur in the subtropical parts of the Atlantic. The 

 following is a list of the species already known : 



Eiif^n^iinis hcniliardiis (Lin.). Eupagurus aitgulatus (Ri.sso). 

 ocliotoisis Braiult. nictiiiilosus ( R(mix). 



chiroacaiithus (Liljeb.) alatus (Fabr.). 



forbcsi (Bell). pubcsccns (Kroyer). 



sciilptintaitus (Lucas). kruycri Stni. 



