CRUSTACEA NORTH PACIFIC EXPLORING EXPEDITION 6l 



terior tooth being small and supplementary to the fifth : anterior two 

 teeth very large but much less prominent than the others. Postero- 

 lateral margin short and concave. Inferior surface of the body 

 tomentose. Subhepatic and subbranchial regions of the carapax 

 granulated. Meros of hectognathopoda notched at the anterior 

 margin. Chelopoda unequal in size, the right largest, rugose above 

 with reticulating granular ridges ; larger hand with nearly smooth 

 outer surface, fingers gaping and toothed as in O. trtmcatus; smaller 

 hand with the outer and under surface rugose and tomentose, fingers 

 slender, small-toothed, and in contact nearly throughout their length, 

 the tips curved inward- Ambulatory feet granulous above ; last three 

 joints densely tomentose, except the tips of the dactyli, which are 

 smooth and glossy, red, and cr}'stalline in appearance. 



Color above dark olive, minutely punctate with yellow; below, the 

 pubescence is bufif-colored. Larger hand of a clear dark-red color; 

 pincers black. Dimensions of a male : Length of carapax, 0.85 ; 

 breadth, 1.27 inches. Of a female: Length, 1.25; breadth, 1.86 

 inches. 



Found under stones not far below high-water mark, among gravel, 

 in the harbor of Port Lloyd, Bonin Islands. 



Genus PSEUDOZIUS Dana 



84. PSEUDOZIUS MICROPHTHALMUS Stimpson 



PtATE VII, Fig. 3 



Pseitdociiis iiiicrophthahnns Stimpson, Proc. Acad. Nat. Sci. Phila., x, 

 p. 35 [32], 1858. 



Carapax very broad; proportion of length to breadth, 1:1.7. 

 Upper surface smooth, punctate, and perfectly flat except near the 

 deflected anterior margin, where it is somewhat rugulose, as if 

 slightly eroded. Two impressed lines or sulci on the gastric region, 

 which unite anteriorly and lead toward the frontal emargination, 

 there becoming, however, shallow and nearly obsolete. The inter- 

 antennary front is rather narrow, not projecting, and slightly waved. 

 Teeth of antero-lateral margin nearly obsolete, even less prominent 

 than in P. planus; edge obtuse. Orbits and eyes very small. Chelo- 

 poda rather short and stout; upper surface minutely and crowdedly 

 punctate ; fingers short, black. Ambulatory feet hairy beneath ; 

 dactyli thickly pubescent. Dimensions of a female : Length of cara- 

 pax, 0.43 ; breadth, 0.72 inch. 



This species approaches very closely to P. planus Dana, U. S. 



