102 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 120 
only).—Edmondson, 1925, p. 40 (record only).—Gordon, 1934, p. 61.— 
Balss, 1938, p. 85.—Edmondson, 1954, pp. 270-271, figs. 23a-c, 24b.— 
Crosnier, 1962, pp. 144-145, figs. 249-251. 
Thalamitoides alphonsei Ward, 1939, p. 3, figs. 3, 4. 
Marertau.—Philippines: Sta. 5108, Corregidor Lt., 15°05’5’N.., 
120°14’45”E., China Seas, 13 fm., Jan. 15, 1908, Alb., 1 male; Sta. 
5109, Corregidor Lt., 14°03’45”N., 120°16’30"E., 10 fm., coral, 
Jan. 15, 1908, Alb., 1 female. 
Marshalls: Sta. IJ, Bikini Lagoon, 15 fm., sandy bottom with 
Halimeda, one-fourth mi. 8S. of west end, Aug. 7, 1946, J. P. E. Morri- 
son, 1 female; Sta. VI, Bikini I., outer reef, Aug. 8, 1947, F. M. 
Bayer, 1 male, 1 female; Latobak I., Rongerik, Sta. 207, outer reef, 
Aug. 18, 1947, F. M. Bayer and F. C. Zimmerman, 1 male; Latobak 
I., Rongerik, Sta. 262, Aug. 21, 1947, F. M. Bayer and F. C. Zim- 
merman, 1 male; E2-361, Arno Atoll, received 1952, Hiatt, 3 males, 
1 female. 
Samoa: Apia, Samoa, at mouth of river, June 1, 1902, Alb., 1 ovig. 
female. 
Hawaii: Sta. 40, Oahu J., C. H. Edmondson, 1 male. 
MEASUREMENTS.— Males, 8-24 mm.; females, 19-25 mm.; ovig. 
female, 27 mm. 
Remarks.—The male pleopod which has been figured by Edmond- 
son (1954, fig. 43b, c) is here refigured and described. Short, stout, 
gently curved, bearing distally on inner surface two rounded mem- 
branous lobes. Subterminal armature on outer side a regular double 
row of elongate, closely spaced bristles merging into a distal clump of 
small to large bristles. On inner surface, few short hairs, and a 
number of recurved spines lying between the membranes. 
Crosnier (1962) in redescribing Milne Edwards’ type also concludes 
that T. alphonsei Ward is a synonym. 
DistrisutTion.—Red Sea, Madagascar, Amboina, Samoa, Johnston 
I., and Jaluit. 
Thalamitoides tridens A. Milne Edwards 
FIGurEs 38 
Thalamitoides tridens A. Milne Edwards, 1869, pp. 149-158, pl. 6 (figs. 1-7).— 
de Man, 1881, p. 99; 1889, pp. 423-424.—Ortmann, 1893, p. 86.—Nobili, 1901, 
p. 10.—Klunzinger, 1913, pp. 361-363.—Edmondson, 1925, p. 40 (under 
T. quadridens).—Crosnier, 1962, p. 143, fig. 250. 
Hedrophthalmus thalamitoides Nauck, 1880, p. 59, pl. 1 (fig. 25) [fide Nobili, 1906a]. 
Thalamitoides tridens var. spinigera Nobili, 1905, p. 403; 1906a, p. 213. 
Thalamita (Thalamitoides) tridens A. Milne Edwards.—Boone, 1934, pp. 79-81 
pl. 36. 
Thalamitoides tridens typica A. Milne Edwards.—Balss, 1938, p. 35.—Edmondson, 
1954, p. 271. 
