OCR Text |
Show 1879.] THE COREAN AND JAPANESE SEAS. 45 The frontal portion of the carapace is triangular, deflexed, concave above, with five obscure marginal teeth (including the supraocular and median frontal teeth). Carapace convex, sparsely pubescent, without any indication of the different regions ; antero-lateral margin with three small teeth. The anterior legs are small, weak, pubescent, and smooth. The second and third legs are compressed, pubescent, and with a tubercle at the distal extremity of the penultimate and antepenultimate joints. This individual may be the young of C. tumida, Stimpson, from the island of Ousima ; it would not in any case be desirable to constitute it the type of a new species. Length barely 3 lines. The specimen is a young male. HoMOLID^E? PARATYMOLUS. The carapace is shaped nearly as in Homola, e. g. with the front and postfrontal region deflexed, behind the hepatic region flat, with the sides nearly straight. The front is prominent and narrow, composed of two coalescent spines. The antennules are small and apparently broken in the single specimen collected. The antenna? are elongated, the joints of the peduncle hairy, the flagella very slender. The eyes are slender, of normal shape, the peduncles cylindrical and laterally projecting, not, as in Homola, divided into two portions. The outer maxillipeds are rather slender, the second about twice as long as the third joint, the exognath slender and not prolonged beyond the end of the third joint. The anterior legs in the female very slender, fingers longer than the slender palm; the ambulatory legs all alike in form, slender, smooth, the tarsal joints long, straight, and unarmed, those of the fifth pair not raised upon the dorsal surface of the cephalothorax. Postabdomen (of female) jointed, ovate. The systematic position of this genus is somewhat uncertain, as the specimen, which is unique and very small, cannot be dissected with safety. Stimpson placed his genus Tymolus among the Dorip-pidce; but the outer maxillipeds of Paratymolus are more of the Maioid than of the Leucosiid type; and on account of its general resemblance to Homola 1 place it, at least provisionally, with that genus among the Anomura Maiidica. Although the legs are not dorsally raised upon the cephalothorax, it evinces a certain degradation from the Brachyural type in the absence of defined orbits, the long antennae, and several other points; but it may hereafter be thought better to place it among the Maioid Brachyura. The outer maxilipeds are less pediform than in Homola, but less distinctly operculiform than in the generality of Maioid Crustaceans. PARATYMOLUS PUBESCENS, sp. n. (Plate II. fig. 6.) Carapace and legs everywhere covered with a close velvety pubescence ; a strong spine at the angle of the hepatic region, and another smaller in front of it, two small tubercles in front of the gastric and one on the cardiac region, and two in the middle of the |