24Q CRUSTACEA. 



coat. Carapax somewhat convex, not areolate, nearly quadrate, a 

 little transverse; front emarginate; anterolateral margin very short, 

 three-toothed, the teeth minute spines, posterior one much the 

 smallest. Anterior feet not tuberculate ; eight posterior feet quite 

 slender, tarsus mostly covered with a very minute pubescence, like 

 that of the legs and carapax. 



Plate 13, fig. 13 a, outline of anterolateral margin; b, leg of poste- 

 rior pair, enlarged three diameters. 



Sooloo Sea, or Straits of Balabac. 



Length of carapax, 2*4 lines; greatest breadth, 3 lines; ratio of 

 length to breadth, 1 : 1*25. The pubescence or tomentose covering is 

 exceedingly short, and covers uniformly the carapax and legs ; on the 

 posterior legs, which are quite slender, its length is not equal to one- 

 fourth the diameter of the fifth joint. The sternum, abdomen, ptery- 

 gostomian region, and outer maxillipeds, are covered with the same 

 kind of pubescence. The fingers are light-coloured. 



PlLUMNUS MTJS. 



P. ursulo affinis, carapace pedibusqwe deme crasseque lanatis, cajnllis 

 tubulatis. Carapax parce gramdatus. Front* fimbria longd ornatus. 

 Margo antero-lateralls crasse tridentato, denie altero brevi inter duos 

 anteriores infra insito. Pedes antlci incBqui, manu minute tubercidatd, 

 tuberculis superficiei externce seriatis. 



Near P. vrsidus, carapax and feet being densely covered throughout 

 with long, coarse hairs, which are tubular. Surface of carapax 

 slightly granulate. Front with a long fringe of similar hairs. An- 

 terolateral margin stout three-dentate, another short tooth, situated 

 on a lower line, between the two anterior teeth. Anterior feet un- 

 equal, hand minutely tuberculate, tubercles of the outer surface 

 seriate. 



Tongatabu and Samoan Islands. 



Length of the carapax of a male, eleven and one-half lines ; greatest 



