CRUSTACEA WHITELEGGE. 141 



Linn., T. yemmatus, Reeve, Eanella granifera, Lam., and Natica 

 mamilla, Linn. Obtained about high water mark on the sandy 

 beaches ; very abundant. 



DIOGENES PALLESCENS, sp. nov. 

 (Plate vi., fig. 2, a, b, c.) 



The carapace is transversely convex anteriorly, the median 

 anterior region is smooth and is bounded on each side by several 

 low spinulose elevations. 



The antero-lateral margin is armed with eight spinules, the 

 first one situated a very short distance from the external lobe of 

 the front ; immediately posterior to this spine is situated an 

 accessory spine not quite in the same line ; the second one is 

 over the base of the antenna, the remaining six are situated on 

 the lateral margin. The carapace is slightly tomentose behind 

 the cervical groove. 



The front is three-lobed, the median lobe rounded, the lateral 

 lobes angular but not acute. 



The ophthalmic scales triangular, each with three small spinules 

 and a few setse at their distal extremities. The rostriform process 

 is entire, acicular, and projecting but a very short distance beyond 

 the eye scales. 



The ocular peduncles are equal in length to the peduncles of 

 the internal antennse. The peduncles of the external antennae 

 are about two-thirds the length of the eye stalks. The antennal 

 acicle is short, scarcely exceeding the distal extremity of the 

 penultimate joint, it is armed with three spines distally and one 

 at its base. The second exposed joints of the external antennas 

 are armed with a spine at their extero-distal angles. 



The left chelipede has the meral and carpal joints sub-equal in 

 length, the former trigonus, with the angles spinulose, the latter 

 armed on its superior margin with five curved spines, its upper 

 and external surface with a few spiniform granules, the distal 

 extremity is also similarly but more distinctly spinulose. 



The lower border of the hand finger included is as long as 

 the merus and carpus combined, the breadth of the hand at its 

 distal end exceeds half the length of the lower border and 

 finger. 



The proximal external surface of the palm is convex and 

 angular, with three or four spines in a line on the angle and two 

 or three at a short distance above. The lower border of the palm 

 and of the immobile finger is closely granulate, the crest of the 

 hand is armed with from seven to nine small curved spines, 

 exterior to which are a few granules, whilst the distal portion of 

 the palm opposite the base of the mobile finger is smooth and 

 punctate. 



