CRUSTACEA NORTH PACIFIC EXPLORING EXPEDITION I3I 



fingers. Ambulatory feet slender, setose ; setse very short, arranged 

 on the superior longitudinal crests, there being one of these on the 

 meros and two or three on the next three joints; a few long fine 

 hairs below. Abdomen of the male tapering; penult joint pen- 

 tagonal. 



Color in life above light opaque red, brightest on the chelipeds. 

 The surface is clean and shining. Dimensions of the carapax in 

 the male: Length, 0.19; breadth, 0.21 inch. 



Found under stones among pebbles in the third subregion of the 

 littoral zone, on ocean shores at the Island of Ousima. 



Genus CYCLOGRAPSUS Milne Edwards 



217. CYCLOGRAPSUS LONGIPES Stimpson 



Cyclograpsus loiigipes Stimpson, Proc. Acad. Nat. Sci. Phila., x, p. 105 

 [51]. 1858. 



Carapax subtrapezoidal ; much narrowed anteriorly, and much 

 flattened above. Length to posterior breadth as i : 1.21. Surface 

 smooth and glabrous except toward the margins and frontal region, 

 M'here it is minutely rugate transversely. Epigastric lobules dis- 

 tinct, though not prominent. On the antero-lateral margins there 

 are often obscure indications of two or three obsolete teeth. Orbits 

 nearly complete below, as in C. integer. Infraorbital crest 3- or 

 4-lobed externally. Oblique crest of outer maxillipeds on the 

 ischium-joint passing almost longitudinally close to the margin. 

 Chelipeds short ; hand inflated, smooth within and without. Am- 

 bulatory feet very slender, more than twice as long as the carapax ; 

 meros minutely rugulose transversely; penult joint and dactylus 

 setose ; dactylus long, cylindrical, not tapering, and sulcated. Abdo- 

 men of the male rather narrow, somewhat tapering, but less so than 

 in C. pimctafus: last joint much narrower than the penult. The 

 form of the abdomen is between that of C. einereiis and C. pnnctat\is. 

 It is in life fawn-colored above, darker anteriorly; below much 

 paler; abdomen whitish. Eyes of a dark mahogany color. Dimen- 

 sions of a male: Length of carapax, 0.28; breadth, |)osteriorl\-, 0.34; 

 length of second pair of ambulatory feet. 0.63 inch. 



Found under stones at the dof)th of one fathom, on coral gravel, 

 in Port Llovd, Ponin Islands. 



