OCR Text |
Show 1879.] 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 surface. Length of largest male 10^ lines, breadth 1 inch ; of largest female, length 1 inch 1 line, breadth 1| 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. oregonensis, 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. Anterolateral margins with nine, alternately larger and smaller, acute triangular 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 T 5 2 inch, breadth rather more than i inch. A male was collected at a depth of 50 fathoms, in lat. 33° 19' N., long. 129° 7i' 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* |