NO. 3599 PORTUNID CRABS — STEPHENSON AND REES 7 



(2) relatively larger first anterolateral teeth, (3) short granular ridges 

 on the postfrontal areas of the carapace, and (4) longer wrist spines. 

 These small specimens are close to C. moretonensis Rees and Stephen- 

 son (1966), who Ust the distinguishing features. 



Distribution.- — East coast of Africa to Japan and Australia. 



Cliarybdis orientalis Dana 



Charyhdis orientalis Dana, lS52a, p. 285, pi. 17 (fig. 10); 1852b, p. 85.— Sakai, 



1939, pp. 407-8, pi. 53 (fig. 2). 

 Charyhdis {Charyhdis) orientalis Dana. — Leene, 1938, pp. 68-72, figs. 32-34 



[excluding some synonymy]. — Stephenson, Hudson, and Campbell, 1957, 



pp. 502-3, figs. 2B, 3B, pi. 3, (fig. 1), pi. 4G.— Crosnier, 1962, pp. 80-1.— 



Stephenson and Rees, 1967, p. 11. 

 Not Charyhdis orientalis Edmondson, 1946, p. 281, fig. 173e {— C. hawaiiensis). 



Material examined. — 1 male (38.5 mm), India, north side Okah 

 Point, Port Okah, Mar. 9, 1963. 7 males (ca. 23-58 mm), 7 females 

 (34-ca. 67 mm), Sta. No. LW-1. 3 males (18.5-73.5 mm), 3 females 

 (21-34.5 mm), Sta. No. RF-2. 



Shore collections, rocky and sandy bottoms. 



Remarks. — This species resembles C. hellerii (A. Milne Edwards), 

 particularly the larger individuals in which the second anteiolateral 

 tooth is barely smaller than the first. Both species possess an exten- 

 sion of the posterior border of the carpus of the natatory leg, but, 

 whereas that in C. orientalis is a blunt tubercle, in C. hellerii there is 

 a sharp spine. 



Rees and Stephenson (1966) have shown that Leene (1938) was 

 incorrect in synonymizing C. incisa Rathbun, 1923, with C. orientalis, 

 and Edmondson (1954) has also shown that C. hawaiiensis is a separate 

 species. 



Distribution. — Malgache [Madagascar] and East Africa to Japan 

 and Australia. 



Charyhdis riversandersoni Alcock 



Charyhdis (Goniosoma) riversandersoni Alcock, 1899a, p. 53. — Alcock and McArdle, 



1902, pi. 40 (fig. 3). 

 Charyhdis sagamiensis Parisi, 1916, p. 175, pi. 11 (fig. 1). 

 Charyhdis riversandersoni Alcock. — Balss, 1922, p. 105. — Gordon, 1931, pp. 537-8, 



fig. 13c.— Sakai, 1939, pp. 404-5, pi. 46 (fig. 1); 1965, pp. 122-3, pi. 60 



(fig. 2). 

 Charyhdis (Charyhdis) riversandersoni Alcock. — Leene, 1938, pp. 28-30, figs. 3, 



4a, 4b. 



Material examined. — 1 female (26 mm), Sta. No. 202A. 2 males 

 (65.5, 75.5 mm), Sta. No. 263A. 1 male (18.5 mm), 2 females (26, 

 34.5 mm), 1 additional cheliped, Sta. No. 264A. 



All trawled, depths from 46 to 291 m, muddy bottoms. 



