510) PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
Neptunus (Hellenus) tenuipes (de Haan).—Alcock, 1899, p. 42.—Shen, 1937, 
p. 104, figs. 4, 8. 
Neptunus (Amphitrite) tenuipes (de Haan).—Sakai, 1939, pp. 389-390, pl. 80 
fig. 2). 
Sahin ae (de Haan).—Guinot, 1957, p. 480 (under P. mariei).—Stephen- 
son and Campbell, 1959, pp. 103-104, figs. 2H, 3E, pls. 2 (fig. 1), 4H, 5E. 
MareriaL.—Philippines: Subig Bay, shore, seine, Jan. 7, 1908, 
Alb., 4 males (1 Sacculina infected), 2 females, 3 ovig. females; Port 
Binanga, ship’s side, Jan. 8, 1908, Alb., 2 females; Tachloban Anchor- 
age, about ship, hand dredge, 3 fm., Apr. 12, 1908, Alb., 1 ovig. female; 
Busin Harbor, Burias Is., electric light, Apr. 22, 1908, Alb., 2 males; 
Surigao, Mindanao, 150 ft. seine, May 8, 1908, Alb., 1 male, 1 female; 
Davao, Mindanao, 150 ft. seine, May 16, 1908, Alb., 1 male, 1 female; 
near Sta. 5459, Cabugao, east coast of Luzon, electric light, June 9, 
1909, Alb., 1 male, 1 female; no. 27 Mariveles, Luzon, June 27, 1913, 
A. M. Reese, 1 male; no. 33 Mariveles, Luzon, June 28, 1913, A. M. 
Reese, 5 males, 1 ovig. female; near Mariveles, Luzon, 1913, A. M. 
Ra 
i 
Ficure 15.—Portunus tenuipes (de Haan), fronts: a, Philippines, Mariveles, No. 33, Reese, 
32 mm. male; b, Philippines, Surigao, 4/b., 36 mm. male; c, same as a, 22 mm. male; 
d, Philippines, Pt. Binanga, Alb., 16 mm. female. (Scale=5 mm.) 
Reese, 1 male; Waigin, tide pool, June 8, 1929, Herre collection, 1 male. 
MEASUREMENTS.—Males, 14-36 mm.; females, 16-35 mm.; ovig. 
females, 22-25 mm. 
Remarks.—As specimens become larger, the frontal lobes become 
more acute and prominent (see fig. 15). 
Distribution—Andamans to Japan and the Philippines, including 
Australia. 
Portunus trituberculatus (Miers) 
Figures 16, 17a 
Portunus pelagicus de Haan (not Linnaeus) 1835, p. 37, pls. 9, 10. 
Neptunus trituberculatus Miers 1876b, p. 222; 1886, p. 172.—Sakai, 1934, p. 303; 
1936, p. 129, pl. 37. 
Portunus trituberculatus (Miers).—Rathbun 1902, p. 26.—Stephenson and Camp- 
bell, 1959, p. 90 (in key).—Miyake, Sakai, and Nishikawa, 1962, p. 128 (rec- 
ord only). 
Neptunus (Neptunus) trituberculatus (Miers).—Sakai, 1939, p. 388, pl. 50. 
