54 MR. E. J. MIERS ON CRUSTACEA FROM [Jan. 14, 



third. The outer maxilhpeds are densely hairy towards the extremi- 

 ties ; the ambuLitory legs slightly hairy on the penultimate joints. 

 Length of largest specimen about li 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 spi- 

 nules) in the form and proportions of the anterior legs. The anterior 

 lea's 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 eingsleyi, 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 de- 

 pressions 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 nar- 

 row, 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 longitu- 

 dinal lines 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 

 straight, entire, subacute ; fingers nearly as long as the palm, nearly 

 straight, the upper broad and bluntly rounded at its distal extremity: 

 the other leg is slender, smooth, the palm compressed, the fingers 

 about twice as long as the palm, slightly arcuated, leaving a space 

 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 long as the three following together, the third and 

 fourth joints being very short, the fifth but little longer. The dac- 

 tyl! of the following legs are slender and straight. Length about 

 1 inch 1 line. 



One individual is in the collection, obtained with a specimen of 

 the preceding species, in lat. 35° 7' N., long. 136° 55' E., at 3 

 fathoms, on a muddy bottom. 



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. 



