^^79.] THE COREAN AND JAPANESE SEAS. 35 



gin near the distal extremity. Hand with usually two spines on its 

 upper margin, and three longitudinal raised lines on its outer sur- 

 face. 



Length of largest male 10| lines, breadth 1 inch; of largest fe- 

 male, length 1 inch 1 line, breadth U inch. 



Specimens were collected off the Corean coast, in lat. 34° 30' N 

 long. 125° 20' E., at 37 fathoms; in lat. 33° 10' N., long 129° 12* 

 E., in 36 fathoms; in lat. 33° 2^ N., long. 128° 48|' E., at 22 

 fathoms ; and at Otarranai, lat. 43° 12' N., long. 141° 1' E., at 5^ 

 fathoms, on a bottom of coarse sand. ' ^ 



In the females the gastric and branchial regions are very much 

 more convex than in the males. 



There is considerable variation in the sculpture of the wrist and 

 hands. In some specimens the wrist is roughly ridged on its outer 

 surface ; in others it is nearly smooth. The spine on the middle of 

 the upper margin of the hand is sometimes obsolete. 



This species differs both from the T. gibbosulus, De Haan, from 

 Japan, and the T. oregotiensis, Dana, from Puget Sound, in the much 

 broader subequal teeth of the antero-lateral margin, in which it has 

 more resemblance to some species of Cancer, e. g. C. edwardsii. 

 Bell ; but it cannot be confounded with that or any other of the 

 genus known to me. 



Trichocarcinus affinis, sp. n. 



Carapace everywhere granulated and sparsely pubescent, with the 

 middle of the gastric and of the cardiac region convex, and a tubercular 

 prominence on each side of the gastric, one smaller on the hepatic, 

 and three on each branchial region. Front three-toothed. Antero- 

 lateral margins with nine, alternately larger and smaller, acute tri- 

 angular teeth (including the outer orbital tooth) ; the margins of 

 these teeth are seen under a lens to be minutely denticulated ; there 

 is a smaller tooth on the postero-lateral margin behind the last 

 tooth of the antero-lateral margins. Wrist and hand with three 

 series of spinules on the outer surface ; wrist with a strong spine, 

 and hand with two spinules on its upper margin. Ambulatory legs 

 pubescent. Length of female -f-^ inch, breadth rather more than 

 ^ inch. 



A male was collected at a depth of 50 fathoms, in lat. 33° 19' N., 

 long. 129° 7|' E. ; and there is a female individual without definite 

 locality also in the collection. 



The species is allied to T. gibbosulus, De Haan (Faun. Japon., 

 Crust, p. 45, pi. ii. fig. 4, and pi. xiii. fig. 3), which it resembles in 

 the unequal teeth of the antero-lateral margins; but it differs in the 

 much stronger tuberculation of the carapace, and in having only two 

 spines on the upper margin of the hand. 



A larger series might show it to be the young of T. gibbosulus; 

 but the two specimens before me differ very much from De Haan's 

 figure of that species. 



3* 



