OCR Text |
Show 48 MR. E. J. MIERS ON CRUSTACEA FROM [Jan. 14, nearly to the distal end of the rostrum. There are no tubercles on the lateral expansions of the carapace; but the lateral margins are obscurely toothed, as in C. typicus. The anterior legs have the palms tuberculated externally; and the ambulatory legs are cristate, as in that species. Length to end of rostrum 4| lines, breadth 6 lines. North Japan. From Cryptolithodes typicus, Brandt, from California, this species differs in the less-deflexed rostrum, the absence of tubercles on the lateral lobes of the carapace, and the shape of these expansions, which are broadly rounded, with the lateral margins regularly arcuated, whereas in C. typicus the latero-anterior and latero-posterior margins form a more or less distinct angle one with another. It is probable that this character will always suffice to differentiate the species, even if the others should fail in older individuals. C. sit-chensis, Brandt, from Sitka, has, according to Stimpson, a tridentate rostrum and smooth hands. C. alta-fissura, Spence Bate, from Vancouver Island, of which there is a specimen in the Museum, is distinguished by the broad, flat, and rectangular rostrum, and the deep notch in the carapace in which the eyes are situated1. PAGURIDEA. EUPAGURUS CAVIMANUS, sp. n. (Plate III. fig. 1.) Carapace slightly punctulated on the sides in front of the branchial regions, and with a small acute median frontal lobe. Eye-peduncles subcylindrical, scarcely shorter than the peduncles of the antennae, not constricted in the middle, their basal scales entire, and concave above. Antennules with the peduncles rather longer than the eyes. Antennae with their slender basal acicles a little shorter than the peduncles. Anterior legs very unequal ; larger (right) leg with the arm very short, trigonous, concave on its outer surface, and with a few spinules on its distal upper margin ; wrist about as long as broad, and much broadest at its distal extremity, convex and faintly punctulated on its outer surface, its inner surface smooth and concave, and its upper and lower margins distally produced into thin crests, the upper of which is obscurely serrated; hand with the upper and lower margins parallel and sub-cristiform, slightly convex, and nearly smooth on its outer surface, mobile finger not cristate above, and about as long as the upper margin of the palm. Smaller leg very slender, wrist externally granulated and serrated above ; palm subovate, smooth, and concave on its outer surface. Legs of second and third pairs slender, nearly smooth, the terminal joints rather longer than the preceding, and with short stiff hairs on their upper and lower margins. 1 There is also a dried specimen in the Museum, from Vancouver Island •which closely resembles C. typicus, but is distinguisbed by the form of the rostrum, winch is obtusely triangular, and does not project beyond the anterior margin of the carapace. This I propose to designate C. brevifrons. |