NO. 3589 PORTUNID CRABS — STEPHENSON AND REES 15 



Dredged, 12-18 ft sand, shell, and coral rubble. 



Remarks. — As indicated by Stephenson and Rees (1967, p. 28), 

 there is confusion over the different species in the Portunus loiujispi- 

 nosus complex. The present specimen keys out in Stephenson and 

 Rees as P. longispinosus Rathbun but differs from Rathbun's illustra- 

 tion (1906, pi. 12: fig. 6), in possessing a less strongly embossed 

 carapace. 



A brief examination (at the Smithsonian Institution by the senior 

 author) of the material identified by Rathbun as P. longispinosus 

 showed that there is variation in a number of features; it is hoped that 

 this and other material in the complex can be dealt with in a later 

 publication. 



Portunus niinutus (Slien) 



Neptunus (Lupocycloporus) minidus Shen, 1937, p. 115, fig. 9a-c. 



Portunus rninutus (Shen). — Stephenson and Campbell, 1959, p. 89 (in key). 



Material examined. — 1 female (19 mm), Sta. No. AB 41A. 



Trawled, 29-33 m. 



Remarks. — This specimen lias fine spines on the anterior border 

 of the arm of the cheliped. Stephenson, in a later publication, will 

 deal with a new species very close to P. rninutus. 



Distribution. — Previously from Hong Kong and Gulf of Siam. 

 Now off the Gulf of Martaban. 



Portunus orbicularis (Richters) 



Achelous orbicularis Richters, 1880, p. 153, pi. 16 (figs. 14, 15). — Henderson^ 

 1893, p. 371.— Stebbing, 1920, p. 236.— Barnard, 1950, pp. 159-60, fig. 31a 



Neptunus (Achelous) orbicularis (Richters). — Alcock, lS99a, p. 47. 



Portunus (Achelous) orbicularis (Richters). — Rathbun, 1906, p. 871, pi. 12 

 (fig. 4).— Edmondson, 1946, p. 280; 1954, pp. 239-41, figs. 16c-e, 17b. 



Cycloachelous orbicularis (Richters). — Ward, 1942, p. 51. 



Portunus orbicularis (Richters). — Crosnier, 1962, pp. 58-61, figs. 95, 99-102. 



Material examined. — 3 females (12-16 mm), Sta. No. B 16. 



Dredged, 12-18 ft, sand, shell, and coral rubble. 



Remarks.- — The descriptions by Richters, Alcock, and Crosnier 

 mention a carapace that is almost smooth. Crosnier (1962, p. 60), 

 who gives the most recent detailed description, states: "Carapace 

 glabre, subcirculaire, avec des granules sm'tout a la periphcrie et siu* 

 les regions cardiaque et intestinale." His figure 99 shows this 

 granulation and indicates that it is very fine. Meanwhile Barnard 

 (1950, p. 159) had stated: "Carapace . . . feebly granulate in places, 

 with patches of distinct granules mostly near the periphery and on 

 the gastric and cardiac regions." His figure 31a shows a much more 

 distinct and coarsely granular form than Crosnier's. The present 



