CRUSTACEA NORTH PACIFIC EXPLORIN'G EXPEDITION 49 



cate, but not notched at the insertion of the carpal joint. The chelo- 

 poda are tuberculated ; hands broad, with short fingers. Ambula- 

 tory feet slender ; dactyli pubescent. Abdomen of the male slender, 

 seven-jointed, the third, fourth, and fifth joints not soldered, the 

 terminal joint very long and slender. 



It is allied to Halimede in shape and in the characters of the front, 

 antennze, gnathopoda, and abdomen, but the margin of the orbit is 

 without hiatus, and has no inner fissure of the inferior margin. 



67. POLYCREMNUS VERRUCIFER Stimpson 



Plate VI, Fig. i 



Polvcremnus verrucifer Stimpson, Proc. Acad. Nat. Sci. Phila., x, p. 2)2> 

 '[31], 1858. 



This species differs from P. ochtodcs Gerstjecker (Cancer ocJi- 

 todcs, Herbst, Crust., i, 158, pi. viii, fig. 54), in its smaller size and 

 somewhat narrower carapax, the surface of which is also smoother 

 anteriorly. The tubercles of the chelopoda are less capitate in shape 

 and more numerous. 



Our specimens agree well in size, color, and general appearance 

 with the figure in the Zoology of the Voyage of the Samarang 

 (Crust., pi. X, fig. 2). But they differ in some points mentioned be- 

 low ; and even if identical, we can scarcely suppose the species of 

 Adams and White to be the Cancer ochtodcs of Herbst, to the young 

 of which it is referred by the English authors. It is constantly 

 smaller, while most of the numerous specimens examined have every 

 appearance of being adults. 



In the specimens now imder examination the teeth of the antero- 

 lateral margin are granulated below, and there are two minute teeth 

 on the postero-lateral margin behind the large teeth. There is a 

 granulated protuberance on each side just above the lateral extremity 

 of the posterior margin. The carpus and hand are more verrucose 

 than is represented in the figure of Adams and White, much of the 

 outer, as well as the upper, surface being covered with tubercles. 

 The ambulatory feet are somewhat scabrous above, particularly on 

 the meros joint; their sides are smooth ; the last two joints are hairy. 

 The abdomen is much more slender, and the third joint more elon- 

 gated, than in the figure cited. The color in life was yellowish- 

 brown, mottled. Dimensions of a male: Length of carapax, 0.63; 

 breadth, o.yii inch : ratio, i : 1.2. 



This si)ecics is not uncommon on bottoms of sliell\ mud. at the 

 dejith of four or five fathoms, near Hongkong. China. 

 4 



