CBTJBTACEA. 219 



■without definite locality, from the collection of the late Dr. Bleeker, 

 and already referred to in my report on that collection. 



53. Pilumnus vespertilio {Fair.). 



Pive specimens were collected on the beach at Port MoUe (Ifos. 95, 

 103) (first collection). From the second collection are retained a 

 female from Thursday-Island beach (No. 167), a male from a 

 coral-reef at Clairmont (No. 151), a female from West Island, 

 Prince of Wales Channel (No. 149), and a small female from Dundas 

 Straits, N.W. Australia, 17fms. (No. 161). In nearly aU the hairs 

 with which the carapace is clothed are of a cinereous colour. Hess 

 mentions itS occurrence at Sydney. It is s^id by Mr. Haswell to 

 be common in Australia on coral-reefs. 



A very large series of specimens of this widely distributed species 

 is in the Museum coliectioii, from the following localities : — Mau- 

 ritius (Old Oollection} ; Seychelles (Br. E. P. Wright) ; Java (coll. 

 Dr. Bleeker) ; Timor Laut (IT. 0. Forbes) ; N.W. coast of Australia, 

 Nicol Bay (Mr. du Boulay) ; Madjica-Sima group (H.M.S. ' Sama- 

 rang' types of P. ursulus) ;. Philippine Islands, Siquijor (Ouming); 

 Cumberland Island, Sir C. Hardy's Island (J. B. Jukes); New 

 Zealand (Dr. A. Sinclair, R.N.) ; Piji Islands, Vanua Levu, Bau 

 (H.M.S. ' Herald ') ; Samoa Islands, Upolu, &c. (Bev. S. J. Whitmee) ; 

 New Hebrides (J. Ma^illivray) ; besides others without definite or 

 well- authenticated localities. 



I have in my report on the late Dr. Bleeker's collection of 

 Malaysian Crustacea given the principal references to the synonyma 

 of this species. 



54. Pilumnus pulcher. (Piatb XXII. fig. A.) 



In this species the carapace is regularly convex and somewhat 

 orbiculate, the antero-lateral margins being as long as the postero- 

 lateral and regularly arcuate ; the upper surface of the body and 

 legs is rather thinly clothed with very long fulvous hairs, beneath 

 which the carapace is granulated ; the median frontal lobes are 

 very prominent, deflexed, and divided by a very narrow (or closed) 

 median fissure ; the orbital margins are denticulated ; between each 

 of the four principal spines of the antero-lateral margins are three 

 or four scarcely smaller tfpinules. The pterygostomian regions are 

 smooth ; the sternum coarsely punctated. All the segments of the 

 postabdomen distinct in both sexes. The basal antennal joints axe 

 robust and reach to the subfrontal processes ; the merus-joints of 

 the outer maxillipedes small and smooth. The chelipedes are mode- 

 rately robust, and in the specimens examined nearly of equal size ; 

 arm short, trigonous, smooth, with a strong spine near the distal 

 end of its upper margin ; wrist grahul^,ted externally, with only a 

 small spinule near the distal end of its inner margin ; palm with 

 three spines on its upper margin (see fig. a), its outer surface 

 strongly tuberculated, the tubercles arranged in longitudinal series, 



