90 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
Palau Is.: Palau I., Sta. 125-1187, about 1% mi. NE. of Ngabadon- 
eu, 7°17/36’"N., 134°21’42"E., 17 fm., Aug. 24, 1955, GVF, 1 female. 
Marianas: Tumon Bay, Guam, Sta. 80/x-30, N.M.R.V. No. 2. 
June 27, 1945, 1 female; Agfayan Bay, Guam, 145/RHB-150, July 
7, 1945, R. H. Baker, 1 male, 1 female; Tumon Bay, Guam, Sta. 
147-RHB-153, July 10, 1945, R. H. Baker, 1 male; Tumon Bay, 
Guam, 174/RHB/153, July 10, 1945, R. H. Baker, 1 male; Guam, 
December 1945, D. G. Frey, 1 male; Oca Pomt, Guam, January 
1946, D. G. Frey, 1 male. 
Japan: Akune, Alb., 1 male, 1 female; Tanego Shima, 1906, Alb., 
2 males, 4 females; Okinawa, 1906, Alb., 2 males. 
Samoa: No. 14, Apia, outer reef, 1902; Alb., 1 male; Apia, at 
mouth of river, June 1, 1902, Alb., 1 female; Apia, outer reef, June 
27, 1902, Alb., 5 males, 2 females, 2 ovig. females; Apia, outer coral 
reef at low tide, July 1, 1902, Alb., 1 ovig, female; Apia, outer reef, 
July 1902, Alb., 2 males, 1 female, 1 ovig. female; Pago Pago, no. 10, 
August 1902, Alb., 1 male, 1 female. 
M&ASUREMENTS.—Males, 14-62 mm.; females, 19-51 mm.; ovig. 
females, 36-54 mm.; juv., 19 mm. 
ReEMARKS.—In unworn specimens, the basal antennal joint bears 
about five sharp teeth or spines, but with progressive wear these 
appear to be reduced first to two teeth and eventually to none. The 
2-toothed forms key out with Stephenson and Hudson (1957, p. 316, 
couplet 8) to T. tenuipes Borradaile, 1902, which is possibly a syno- 
nym. Forms without teeth may key out as T. picta, but in this case 
the basal antennal joint is never acute as in 7. picta and rarely com- 
pletely smooth. 
The nonovigerous female (42 mm. from Apia, Samoa, outer reef, 
July 1902) has only four anterolateral teeth on the right side, the 
second and third of those normally present being fused. | 
Disrripution.—Delagoa and Red Sea to Marshalls, including | 
Japan and Australia. | 
Thalamita pseudopoissoni, new species 
Figure 33; PLATE 8B 
Thalamita poissonii Sakai, 1939, pp. 423-424, fig. 17, pl. 85 (fig. 2). 
not Portunus poissonit Savigny, 1817, pl. 4 (figs. 3 [1-2], 5 [1-2]). 
Audouin, 1825, p. 84 [fide Stephensen, 1945]. | 
Not Thalamita poissoni Stephensen, 1945, pp. 131-136, figs. 32A—H. 
Mareriau.—Philippines: Sta. 5159, Tinakta I., Sulu Archipelago, | 
Tawitawi Group, 5°11'50”N., 119°54’E., Feb. 21, 1908, Alb., 1| 
male (8 mm.). 
Palau Is.: Sta. 125-1187, about 1% mi. NE. of Ngabadongu, — 
@ i486", 134°21’E., 17 fm., Aug. 24, 1955, GVF, 1 male (8 mm.— | 
