158 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 18 



Telson symmetrical, incompletely divided by transverse suture, ter- 

 minal margin armed with denticulations, the most lateral pair of teeth 

 on each side largest, then two or three minute teeth, one larger, and then 

 a series of rather uniform minute teeth in the center ; uropods larger on 

 left side, anterior blade with rasp over most of outer surface, posterior 

 blade much reduced, completely covered by rasp on outer surface. 



Distribution: Cocos Island, Costa Rica, in 66 fathoms (Faxon 

 1893). 



Specimens in the Hancock collections are from off Nuez Island and 

 Chatham Bay, Cocos Island. The station numbers are as follows : 



772-38 1 779-38 1 



773-38 1 780-38 3 



The depth range was from 30 to 60 fathoms. 



Pylopagurus hirtimanus Faxon 



lS93Pylopagurus hirtimanus Faxon, Bull. Mus. Comp. Zool. 24 p. 170. 

 1895 Pylopagurus hirtimanus Faxon, Mem. Mus. Comp. Zool. 18 p. 65, 

 PI. 13, figs. 1-le. 



Type: Syntypes, Museum of Comparative Zoology, Harvard Uni- 

 versity, from off Cocos Island, Costa Rica, dredged by the Albatross in 

 66 fathoms 28 February 1891 (Faxon 1895). 



Description: Chelipeds dissimilar and unequal, the right much 

 larger; merus short, naked, almost as deep as long, lower lateral margin 

 with series of sharp spines ; carpus with dorsal surface very hirsute and 

 with scattered small, pointed granules, medial margin marked by row of 

 sharp, anteriorly curved spines; hand margined by row of even, sharp 

 teeth except for ill-defined posterior margin, proximal one third of dorsal 

 surface setose, hairy area ending abruptly to expose low dome-shaped 

 granules with flat, circular bases cut into radiating peripheral processes 

 covering entire opercular surface. 



Minor cheliped reaching beyond base of dactyl, over one half as 

 wide as major hand, merus similar to that of major hand but smaller; 

 carpus very hairy on dorsal surface, bearing median row of sharp curved 

 spines; hand covered with tubercles similar to those of larger hand, 

 lateral border likewise margined as the larger hand, but medial margin 

 lacking teeth, inferior surface hairy and tuberculose. 



Precervical portion of carapace wider than long, posterior border 

 extending into rounded lobe, median projection in advance of laterals, 

 obtuse, slightly depressed and obscured by tuft of setae near apex ; lateral 



