84 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
in the one figured by Stephenson (1961a, pl. 4, fig. K), the sides are 
distinctly concave. 
Minor differences in general facies as between the descriptions of 
different authors have been noted by Crosnier. Possibly later study 
will show the existence of several subspecies. 
Distripution.—Madagascar, Carolines, Japan, and Western 
Australia. 
Thalamita philippinensis, new species 
Ficure 31; PLATE 8a 
Matertau.—Philippines: Sta. 5163, Observation I., Sulu Archipel- 
ago, Tawitawi Group, 4°59’10”N., 119°51’E., 28 fm., coarse sand, 
Feb. 24, 1908, Alb., 2 ovig. females; Sta. 5165, Observation I., Sulu 
Archipelago, Tawitawi Group, 4°58’20”N., 119°50’E., 9 fm., coral, 
Feb. 24, 1908, Alb., 3 females (1 ovig.); Sta. 5218, Anima Solo I., 
between Burias and Luzon, 20 fm., Apr. 22, 1908, Alb., 5 males, 5 
females (1 ovig.); Davao Bay, from pearl oysters, May 18, 1908, Alb., 
1 male; Sta. 5249, Gulf of Davao, Lanang Point, 7°06’06”N., 125°- 
40’08”E., 23 fm., May 18, 1908; Alb., 1 male (holotype—cat. no. 
112238); Sta. 5251, Gulf of Davao, Linao Point, 7°05’12”N., 125°- 
39'35”E., 20 fm.; May 18, 1908, Alb., 1 female; Sta. 5252 and Sta. 5253, 
Linao Point, Gulf of Davao, 7°04’48”N., 125°39’38”E., 28 fm., coral, 
May 18, 1908, Alb., 3 males, 2 females (1 ovig.); Sta. 5254, Gulf of 
Davao, Linao Point, 7°05’/12”N., 125°39’35”E., 20 fm., May 18, 1908, 
Alb., 1 male, 2 females; Sta. 5254, Gulf of Davao, Linao Point, 7°05’- 
42”N., 125°39'42”E., 21 fm., sand coral, May 18, 1908, Alb., 2 males. 
Description.—Front: Six lobes, all rounded and distinctly sep- 
arated; medians on lower plane than remainder and approximately 
two-thirds width of submedians; laterals roundedly triangular. Inner 
orbital lobes moderately broad, almost straight, sloping slightly back- 
ward, and almost the length of submedian lobes. 
Anterolateral teeth: Fourth very much smaller than remainder, but 
still clearly visible and blunt. Remainder all sharp with first the 
stoutest, followed by second, with third and fifth fairly slender. 
Carapace: Covered with short pile and finely granular. All normal 
ridges present excepting anterior mesobranchial and cardiac. Meso- 
gastrics interrupted in midline, and epibranchial broadly interrupted 
at cervical grooves. 
Basal antennal joint: Shorter than major diameter of orbit (ca. 0.8 
times in larger specimens) and bearing short acute ridge with rounded 
eranules. 
Chelipeds: Coarsely granular on upper surfaces and smooth below. 
Right much stouter than left. Anterior border of arm bearing three 
stout spines and one or more tubercles. Spine at inner angle of wrist 
