2 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



and 202B were the richest trio of stations wdth respect to number of 

 species recorded (4, 5, 4, respectively) and number of individuals 

 (434, 1760, 289, respectively). 



Throughout, synonymy has been abbreviated in most cases to a 

 few recent references that permit ready identification. Fuller listings 

 are given in cases where the synonjrmy has presented problems. 



Dunensions are those of breadths and are given in milluneters. 

 Measurements were by dial calipers to the nearest 0.1 mm, but these 

 are given below only to the nearest 0.5mm. 



Genus Charybdis de Haan, 1833 

 Charybdis callianassa (Herbst) 



Cancer callianassa Herbst, 1789, pi. 54, fig. 7 (fide Leene, 1938). 



Charybdis (Charybdis) callianassa (Herbst). — Leene, 1938, pp. 81-4, figs. 41-43. — 



Stephenson, Hudson, and Campbell, 1957, pp. 493-5, figs. IB-D, 2C, 3D, 



pi. 1 (fig. 2) ; pi. 44.— Stephenson and Rees, 1967, p. 8. 



Material examined. — 1 ovig. female (30 mm), Sta. No. AB 

 40-63. 4 males (22.5-27 mm), Sta. No. 203B. 53 males (16.5-30.5 

 mm), 91 females (20-29 mm), Sta. No. 203C. 1 male (32 mm), 

 1 female (29 mm), Sta. No. 204A. 1 female (18.5 mm), Sta. No. 222A. 

 5 males (20-25.5 mm), 16 females (19-31.5 mm), 2 ovig. females 

 (20.5-23.5 mm), 3 Sacculina-miested specimens (20-22 mm), Sta. 

 No. 223A. 5 males (19.5-25 mm), 1 female (18 mm), Sta. No. 224A. 

 1 ovig. female (23 mm soft, without appendages), Sta. No. 9682. 



All trawled in shallow water (12.5-33 m); all notings on nature 

 of bottom mention mud. 



Remarks. — In many specimens the ridge on the cardiac region of 

 the carapace is very indistinct, and these specimens are difficult to 

 key out from Leene (1938). The last listed specimen probably 

 belongs to this species, but, in absence of chelipeds, there is some 

 uncertainty. 



C. ihlei Leene and Buitendijk (1949, pp. 291-3; figs. 1, 4a), closely 

 resembles the present species but differs in having a bifid first antero- 

 lateral tooth and a different male pleopod. This species apparently is 

 known only from the holotype. 



Distribution. — Karachi to northern Australia. 



Cliarybdis feriatiis (Linnaeus) 



Cancer feriatus Linnaeus, 1758, p. 625. 



Charybdis (Charybdis) cr^iciata (Herbst). — Leene, 1938, pp. 24-7, figs. 1, 2. — 



Stephenson, Hudson, and Campbell, 1957, pp. 495, 497, figs. 2E, 3F, pi. 1 



(fig. 3), pi. 4B.— Crosnier, 1962, pp. 75-7, figs. 130-2. 

 Charybdis cruciata (Herbst).— Sakai, 1939, pp. 403-4, pi. 82 (fig. 3); 1965, pp. 



123-4, pis. 62, 63 (fig. 1). 

 Charybdis (Charybdis) feriatus (L.).- — Stephenson and Rees, 1967, p. 10. 



