CRUSTACEA NORTH PACIFIC EXPLORING EXPEDITION I4I 



233. XENOPHTHALMUS PINNOTHEROIDES White 



Xenophthalmus pinnotheroides White, Ann. and Mag. Nat. Hist., xviii, 

 177; Voy. Samarang, Crust., p. 63, pi. xii, fig. 3. Milne Edwards, 

 Mel. Carcin., p. 187. 



Our specimen was dredged in the harbor of Hongkong from a 

 muddy bottom, in six fathoms. 



PINNOTHERID.^ 

 Genus PINNOTHERES Latreille 



234. PINNOTHERES OBSCURUS Stimpson 



Pinnotheres obscuriis Stimpson, Proc. Acad. Nat. Sci. Phila., x. p. 108 

 [54], 1858. 



The only specimen in our possession is a female, of which the 

 following is a description : Carapax broad, inclining to subtrape- 

 zoidal in form, but rounded at the angles and more or less convex 

 on every side. Proportion of length to greatest breadth, i : 1.36. 

 Surface naked, glossy. Hepatic regions forming rather prominent 

 corners to the carapax ; their upper surface depressed. Front very 

 slightly projecting beyond the antero-lateral angles, and much de- 

 flexed, truncated below with a nearly straight margin. Outer max- 

 illipeds large, meros curved, very oblique, with smooth and glossy 

 surface, and the margin somewhat hairy at the anterior half of the 

 inner side ; palpus very small, hairy, not reaching beyond the inner 

 angle of the meros ; carpal joint thick ; dactylus slender, subcylin- 

 drical, attached to the penult- joint rather beyond the middle and 

 projecting beyond its extremity. Ambulator}'- feet nearly equal in 

 length, those of the last two pairs a little longer ; dactyli of the first 

 two pairs short; that of the third pair long, curved inward; that of 

 the last pair nearly as long as the penult joint, and very slender, 

 nearly straight, tapering, styliform. witli hairy margin. 



Color dark brown. Length of the carapax, 0.33 ; breadth, 0.45 

 inch. 



Found at Plongkong. 



235. PINNOTHERES BONINENSIS Stimpson 



r'uuuillicrcs boninriisis Stimpsox. Proc. Acad. Nat. Sci. Phila., x. p. 108 

 [54], 1858. 



Description of a female. Carapax rather broad, truncate before. 

 Proportion of length to breadth, i : 1.25. Surface naked. Front 



