( 145 ) 



Geographical range: tropical west Africa; Red Sea littoral and east 

 Africa, through the Indo-Pacific to Vancouver, Lower California, and 

 Coquimbo. 



3. CcENOBiTA PERLATUS, Edw. Plate XIV., fig. 2, 2a. 



CcFuobita pcr/n/a, Milne Edwards, Hist. Nat. Crust, II., 1837, p. 242, and in Cuvier, 

 RegneAnim. (3), pi. .\liv. fij;. 1 : DeHaan, Faun. .Japon., Crust., 1849, p. 213 : Brocchi, Ann. Sci. 

 Nat. Zool. (6) II , 1875, Art. 2, p. 40, pi. .xv. fig. 45-47 (male orifice). C. petlatm, Richters in 

 M5bius Meeresf, Maurit., 1880, p. 160. C. pohitu, Miers, Zool. H. M. S. "Alert," 1884. pp 519, 

 555 : Henderson, Challenger Anomura, 1888, p. 52: Walker, Journ. Linn. Soc , Zool , XX. 1887, 

 p. 112: Bouvier. Bull. Soc. Phiiom., Paris, (8) II , 1889 90. p. 148. C. petlatus, Ortmann, Zool. 

 Jahrb., Syst., VI., 1892, p. 319, pl. xii. fig, 25 : Borradaile, P. Z. S., 1898, p. 459 ; and Stomatop. 

 & Macr. Willey's Exp., 1899, pp. 397, 425; and Fauna & Geogr. Maid. & Lace. Arch., 1 i. 

 1901, pp. 68,97: Nobili, Ann. Mus. Genov. (2) XX., 1900, p. 495: Lanchester, P. Z. S.. 1902, 

 II., p. 369. 



Carapace punctate behind, thickly spotted with light-tipped vesiculous 

 granules in front of the cervical groove, the gastric region little conve-x. 



Eyestalks compressed, dorsally vesiculo-granulose, reaching beyond the 

 middle of the terminal joint of the antenna! peduncle. Ophthalmic scales 

 narrow, acute. 



Antennular peduncle not quite as long as the carapace. The peduncle 

 of the antenna does not reach the middle of the 2nd joint of that of the 

 antennule. Antennal acicle fused with the 2nd joint of the peduncle. 



The exposed surfaces of the chelipeds and legs are copiously spotted 

 with small, light-coloured, dark-corneous-tipped tubercles, the corneous tips 

 of which have a tendency to become spiniform and are true spines on the 

 dactyli and along the inner edge of the propodites. 



On the upper part of the outer surface of the left cheliped there is 

 a stridulating organ formed by an oblique series of oblique laminar tubercles 

 which gradually pass into the ordinary corneous-tipped tubercles of the 

 general surface. In the upper part of the inner surface of both palms there 

 is a thick triangular brush of long hairs. 



The 2nd legs equal, the 3rd slightly surpass, the larger cheliped: the 

 inferior surface of those of the right side is setose. The dactyli are trian- 

 gular in section, and on the concave inner surface of the left dactyli there 

 is a fine longitudinal ridge, the edge of which is corneous and very finely 

 pectinate. In the 3rd left leg the outer surface of the ptopodite is convex 

 and is not separated from the anterior surface by any crest. 

 19 



