NO. 3556 PORTUNID CRABS—STEPHENSON AND REES 61 
to place a given specimen in a definite category, but wherever possible 
this was attempted. 
The results show that there is every gradation from specimens 
which might be categorized ‘6/7 edwardsi and 1/7 admete’’ to those 
which are “7/7 admete,”’ and that there is a lack correspondence be- 
tween any two features. 
Several pleopods are figured (fig. 20). These show intermediates 
between the two figured by Forest and Guinot and extend the range 
beyond their limits. A further extension is provided by Stephenson 
and Hudson (1957, fig. 31). 
Following the publications of Crosnier (1962) and Guinot (1962), 
the entire collection was reinvestigated separately by each of the 
present authors who agreed that, if two forms were present, the only 
hope of separation lay in the carination of the outer surface of the 
chelipeds. Investigation then showed that in some specimens both 
upper and middle carinae are strongly developed and granular. In 
others the upper carina is strongly granular and the middle one, 
while strongly developed, is without granules. In yet others the 
upper carina of the smaller cheliped is granular but that of the larger, 
nongranular. In others there is a distinct but smooth lower carina, 
while the upper one is barely distinguishable or indistinguishable. 
Finally in some, the upper carina has disappeared, and the lower one 
is distinguishable with difficulty or not at all. In other words there 
is a complete gradation between extremes. 
T. spiceri, based upon three females, remains a doubtful synonym. 
Edmondson compares it with 7. pilumnoides but not with T. admete, 
which it appears to resemble closely. 
DistrisuTion.—Red Sea and East Africa to Hawaii and Tahiti, 
including Japan and Australia. 
Thalamita auauensis Rathbun 
Figures 21, 22 
Thalamita auauensis Rathbun, 1906, p. 874, pl. 12 (fig. 1)—Edmondson, 1951, 
p. 222, fig. 24b; 1954, pp. 257-258, figs. 32a—d.—Stephenson and Campbell 
1957, pp. 319, 320 (in key). 
MarteriAu.—China: Sta. 5321, Ibugos Is., China Sea, Formosa, 
20°19’30” N., 121°51’15” E., 26 fm., white sand, coral, broken shells, 
Nov. 9, 1908, Alb., 1 male. 
Philippines: Sta. 5557, Sept. 18, 1909, Alb., 1 ovig. female; Great 
Tobea I., tide pool, sand, coral, Dec. 15, 1909, Alb., 1 female. 
Marianas: 148/R.H.B.—-155, Ritidian Point, Guam, July 12, 1945, 
R. H. Baker, 1 ovig. female; Guam, October-November 1945, J. L. 
Gressitt, 1 ovig. female; Saipan, in coral heads, 1945, A. H. Banner, 
1 juv; 177-G-1, Ifaluk, Caroline Is., 1953, F. M. Bayer, 2 juvs. 
