OCR Text |
Show 1879.] THE COREAN AND JAPANESE SEAS. 49 One individual was collected at a depth of 100 fathoms, in lat. 41° 40' N., long. 141° 10' E. By the form of the ophthalmic scales, the dilated carpus of the right anterior leg, and the externally concave palm of the left anterior leg, this species is easily distinguishable from its congeners. It does not seem to be allied in any close degree to any of the species described by Stimpson from the Chinese and Japanese seas. In Eupagurus forceps, M.-Edw., a Chilian species, which has the wrist of the larger hand strongly cristate above and beneath, the fingers of the smaller hand are described as being very long, slender, and acute, whereas in E. cavimanus they are of moderate length. There are a few other specimens of Paguridea in the collection, which, being in mutilated condition, cannot be determined with certainty. One, obtained at the Goto Islands at low-water mark, has lost the postabdomen and one of the anterior legs, but is perhaps referable to the Pagurus lanuginosus of De Haan. Another, which, like Pomatocheles jeffreysii, inhabited a shell of Dentalium, is too imperfect to be described. POMATOCHELES, gen. nov.1 Cephalothorax and its appendages as in the Pagurides. Carapace with a median frontal lobe, and postfrontal and other sutures; posteriorly it is partly membranaceous. Postabdomen as in the Ma-crura, extended, straight, with parallel sides, composed of seven distinct segments, interiorly closed by two longitudinally-folding membranaceous flaps, which meet in the middle line. Eye-peduncles slender, cylindrical, straight. Antennules and antennae rather short, the latter with simple multiarticulate flagella. Antennal aciculum small. Outer maxillipeds subpediform. Anterior legs (as in Cancel-lus) equal; hands bent obliquely downwards from the wrists, and flattened above, fingers opening horizontally, and acute at tips. Second and third legs slender, elongated, terminal joints long, straight, and acute. Fourth and fifth legs small and weak ; last joint of fourth pair with a small terminal claw, and that of the fifth pair with a tuft of hairs and minute claw at its distal end. Postabdominal appendages of the second to fifth segments slender, those of the second segment elongated, and 4- or 5-jointed, the rest short. Appendages of the penultimate segment (uropoda) with two lamellate unequal rami. Telson membranaceous in its distal half, and divided by a terminal notch into two rounded lobes. I have much pleasure in dedicating the single species of this remarkable genus to Dr. J. Gwyn Jeffreys, F.R.S., by whom the entire series of Crustacea collected by Capt. St. John was presented to the British Museum. POMATOCHELES JEFFREYSII, sp. n. (Plate III. fig. 2.) The animal is slender and elongated. The carapace is marked 1 7rwua, a lid, and x»jAij, a claw. PROC. ZOOL. Soc-1879, No. IV. 4 |