OCR Text |
Show 54 MR. E. J. MIERS ON CRUSTACEA F R O M [Jan. 14, third. The outer maxillipeds are densely hairy towards the extremities ; the ambulatory legs slightly hairy on the penultimate joints. Length of largest specimen about 1^ inch. Two specimens were collected:-one in lat. 34° 6' N., long. 136° 15' E., at 11 fathoms; the other in lat. 35° 7' N., long. 136° 55' E., at 3 fathoms, on a bottom of soft mud. So far as can be judged from the descriptions of the numerous species of this genus, the one now described differs from all those of the same section (in which the rostrum rises from the margin of the front, the basal joint of the antennae is without a spine, the larger hand excavated above and below, and the orbital margins without spinules) in the form and proportions of the anterior legs. The anterior legs somewhat resemble those of A. bis-incisus and A. lobidens, De Haan, but are much more slender and elongate, there is a spine at the distal end of both the upper and lower margins of the arms, and the lobes terminating the upper and lower margins of the larger hand are both acute. ALPHEUS KINGSLEYI, sp. n. Carapace smooth; upper orbital margins rounded and without spines. Rostrum acute, projecting little beyond the orbits, between the eyes very narrow-linear, and separated from them by deep depressions in the surface of the carapace. Antennules with the second joint of the peduncle more than twice as long as the first, and, like the antennae, without a basal spine. Antennal scale narrow, with a prominent spine at its antero-external angle. Anterior legs very finely granulated, the margins of palms and fingers with long flexible hairs; in the larger (right) leg the arm is without spines at its distal extremity; wrist very small, transverse- hand (with fingers) rather more than twice as long as broad, laterally compressed ; palm with its upper margin marked with two longitudinal hnes of long hairs, and with a small transverse groove near the base of the mobile finger, inner and outer surface smooth, not cari-nated, outer surface slightly concave below upper margin, with a faintly-marked oblique impressed line near its base; lower margin s raight, entire, subacute; fingers nearly as long as the palm, neariy straight, the upper broad and bluntly rounded at its distal extremity the other leg is slender, smooth, the palm compressed, the fino-ers about twice as long as the palm, slightly arcuated, leaving a s?ace between their inner margins, and crossing at the tips when closed. The second pair of legs has the first and second joints of the carpus each nearly as bug as the three following together, the third and fourth joints being very short, the fifth but little longer. The dac- Unch ] line S ^ "" ****** and 8tnd«ht- LenSth ^ One individual is in the collection, obtained with a specimen of the preceding species, in lat. 35° 7' N , long. 136° 55' E Tr % fathoms, on a muddy bottom. g ' at 3 This species, on account of the form of the front and anterior legs belongs to a small section of the genus Alpheus including the A. |