Mr. E. J. Miers on Malaysian Crustacea. 373 



longer than the preceding, nearly smooth on its outer, and 

 densely granulated and hairy on its upper and inner surfaces. 

 The coxse of the fifth legs in the male are greatly produced 

 and subacute, and nearly of equal length ; the left coxa has a 

 slight rounded prominence on its outer margin. It differs 

 principally in the form of the coxae of the fifth legs of the 

 male, and may prove to be a distinct species. Length of 

 carapace nearly f inch. 



Diogenes miles (Fabr.). 



A specimen is in the collection (without definite locality) 

 which belongs, I believe, to this species. It very nearly re- 

 sembles a specimen from the Philippine Islands, which was de- 

 signated by White (but never described) as Pagurus subpi/osus, 

 but which cannot be regarded as specifically distinct. In 

 these specimens the penultimate and antepenultimate joints 

 of the legs and the outer surface of the larger hand are simply 

 granulated (in the Philippine example the granules of the 

 hand are less numerous and crowded). In what I regard as 

 the adult D. miles, the granules of the hand and penultimate 

 and antepenultimate joints of the legs are replaced by spinules. 

 There are in the Museum two small specimens from Dukhun 

 (Col. Sykes) which probably belong to D. miles*. 



* Of the genus Diogenes there are in the British Museum examples 

 from Ceylon (Holdsivorth) and Pondicherry of the species figured by 

 Herbst as Cancer miles, but which is certainly not the miles of Fabricius, 

 Milne-Edwards, and Dana, and which is at once distinguished by the 

 form of the larger hand, which is granulated on its upper and lower 

 margins and smooth on its outer surface, by the existence of a strong 

 blunt lobe or tubercle on the inner margin of the wrist, and by the 

 smooth non-granulated or spinulose tarsal joints of the second and third 

 pairs of legs. This may be the Diogenes custos {Pagurus custos, Fabr.), 

 or may require a new specific name. There is also a specimen from 

 Shark's Ray, W. Australia, in which the short, acute, non-spinulose 

 rostrum does not project beyond the level of the ophthalmic scales, 

 which are subtriangulate and entire ; the arm and wrist of the larger 

 (left) chelipede are robust and coarsely granulated on their upper and 

 external surface ; the hand somewhat less coarsely granulated, except on 

 its upper margin, very convex on its outer surface, particularly near its 

 articulation with the wrist; lower (immobile) ringer bent downwai'd, and 

 forming an obtuse angle with the lower margin of the palm. The dac- 

 tyli of the second and third legs on the left-hand side are rather short, 

 and scarcely exceed the penultimate joint in length; on the right-hand 

 side they are relatively longer and curved. This species may be desig- 

 nated D. granulatus. 



It is evidently nearly allied to D. avarus of Heller from the Nicobars, 

 in which species, however, the left hand is externally costate, and this 

 chelipede on the whole represented as much slenderer, and the dactyli of 

 the second and third (left) limbs are relatively longer. 



In a specimen from the " Eastern Seas " in the Museum collection. 



