NO. 3556 PORTUNID CRABS—STEPHENSON AND REES 75 
?Thalamita danae Alcock, 1889, pp. 77-78.—Barnard, 1950, p. 174. 
Not Thalamita danae Stimpson, 1858, p. 39. 
Marerriau.—Malay Peninsula: Koh Pipedon, Pocket Bay, Benjal, 
Siam, Mar. 10, 1925, Hugh M. Smith, 1 female. 
China: Sabtan I., China Sea, vicinity Hong Kong, Nov. 8, 1908, 
Alb., 1 male. 
Philippines: Nogas Point, Panay, shore seine, Feb. 4, 1908, Alb., 
1 ovig. female; base reef, Gulf Boni, Dec. 17, 1909, Alb., 1 female. 
M8ASUREMENTS.—Male, 41 mm.; female, 56 mm.; female, damaged, 
ca. 37 mm.; ovig. female, 36 mm. 
Remarks.—Crosnier (1962) distinguishes this species from the very 
similar 7. danae on the basis partly of adult male features and partly 
on general facies as follows: 
a. Penultimate segment of the male abdomen is much wider 
than long, diverging in its proximal two-thirds, then narrowing con- 
spicuously toward its end, while the ultimate segment has markedly 
concave borders. In the single male in the present collection, the 
penultimate segment (fig. 26d) is broader than figured by Crosnier. 
It should be noted that form B of 7. danae approaches 7’. foresti in 
the form of the male abdomen. (Compare figure 26¢ with Crosnier’s 
figure 223.) 
b. Male pleopod is elongate, tapering with a recurved tip bearing 
small spinules and very different from that of 7. danae (form A). 
However, forms A and B of 7. danae differ markedly themselves. 
ce. According to Crosnier the basal antennal joint in T. forests 
bears a more prominent crest carrying sharper granules. In the 
present collection of 7. danae (form A), there are specimens which 
cannot be distinguished from 7’. foresti on this feature. 
d. Different form of the front. Here again examples of 7. 
danae (form A) show some of the points, for example prominence of 
the median frontal lobes, which Crosnier lists as diagnostic features 
of T. foresti. However, typical specimens do differ, and in all cases 
the median frontal lobes in 7’. foresti are relatively smaller and more 
rounded than in 7’. danae. 
A further small distinction lies in the infraorbital lobe which is 
more ventrally inclined in 7. foresti, the difference being most obvious 
in ventral view. 
DistriBuTIoN.—Previously Madagascar and possibly Andaman I. 
and Mozambique. 
Thalamita gatavakensis Nobili 
Thalamita pilumnoides var. gatavakensis Nobili, 1906b, p. 262; 1917, p. 384. 
Thalamita pilumnoides gatavakensis Nobili.—Forest and Guinot, 1961, pp. 34-86, 
figs. 23-25. 
