CRUSTACEA NORTH PACIFIC EXPLORI^X EXPEDITION' II3 



Gcothelphusa dehaani Stimpson, Proc. Acad. Nat. Sci. Phila., x, p. loi 

 [47I, 1858. 



We give below the measurements of our specimen, a male. The 

 antepenult joint of the feet is not pilose: 



Length of the carapax, 1.5; breadth. 1.9; length of greater hand, 

 2.02; breadth, i.i ; length of smaller hand, 1.2; breadth, 0.53 inch. 



It was found on one of the Amakirrima Islands (near Loo Choo) 

 by the officers of the "John Hancock." 



179. GEOTHELPHUSA OBTUSIPES ' Stimpson 



Gcothelphusa ohtusipes Stimpsox, Proc. Acad. Xat. Sci. Phila., x, p. toi 

 [47], 1858. 



Two females of this species were found. Carapax much flattened 

 above and posteriorly ; anteriorly much curved. Length to breadth 

 as 1 : 1.26. Surface regular, covered with crowded punctations. 

 Anterior gastric lobules more prominent than in G. dcJiaani. Trans- 

 verse suture at the middle of the carapax deeply impressed. Sides 

 rugose, with transverse strise ; antero-lateral crest prominent cren- 

 ulated. The carpus-joint in the chelipeds is somewhat rugose above, 

 within small-tuberculated and bidentate, the inferior tooth small : the 

 hands and fingers are sparsely tuberculated. Ambulatory feet slen- 

 der; penult joint spinulose above and below; dactyli crowdedly spin- 

 ulose, especially toward the extremities, the terminal unguiculus not 

 reaching be}'ond the tips of the adjacent spinules, which gives the tips 

 of the feet an obtuse appearance. 



Dimensions of the carapax : Length, 0.722 ; breadth, 0.915 inch. 



Found on the Island of Ousima. 



Genus THELPHUSA Latreille 



180. THELPHUSA PERLATA"' Milne Edwards 



Thelplnisa pcrlata !Milne Ed\v.\rds, Hist. Nat. des Crust., n, 13. Kr.vuss, 

 Sudafr. Crust., p. 27- 



This crab was caught in a small stream near Conslantia, Cape of 

 Good Hope. 



^ Potamon (Gcothelphusa) obtusipcs (Stimpson"). 



' Potavwn ( Fot(iiiiouautcs) perlatiis ( Milno Edwards). 



