NO. 3556 PORTUNID CRABS—STEPHENSON AND REES 33 
seine, sand, Jan. 7, 1908, Alb., 2 males; Alongapo, Luzon, shore, 
Jan. 7, 1908, Alb., 1 male; Port Binanga, ship’s side, 6 fm., Jan. 8, 
1908, Alb., 2 males; Sta. 5158, Tinakta I., Sulu Archipelago, Tawitawi 
Group, 5°12’N., 119°54’30”E., 12 fm., Feb. 21, 1908, Alb., 1 male; 
Sta. 5169, Sibutu Is., 4°32’15"N., 119°22’45”E., 10 fm., Feb. 27, 
1908, Alb., 1 male; Guijulugan, Negros, sta. shore, sand, gravel, 
mud, Apr. 2, 1908, Alb., 1 male; Capurmypugan Point, Mindanao, 
150 ft. seine, May 9, 1908, Alb., 1 male; Pomt Jarnelo, Luzon, 150 ft. 
seine, July 13, 1908, Alb., 1 male; Hinunangan Beach, Leyte, seine, 
July 30, 1909, Alb., 1 male; No. 27, Mariveles, Luzon, June 27, 1913, 
A. M. Reese, 6 males; no. 33, other data as last, 13 males; near Mari- 
veles, Luzon, 1913, A. M. Reese, 2 males; Cebu, 1929, Eclipse Exped., 
2 males. 
MALES (FORM B) 
Philippines: Labuan Blanda J., Buton Strait, marginal coral, 
Dec. 13, 1909, Alb., 2 males. 
FEMALES 
Philippines: Subig Bay, China Sea, off southern Luzon, shore 
seine, sand, Jan. 7, 1908, Alb., 2 ovig. females; Sta. 5159, Tinakta I., 
Sulu Archipelago, Tawitawi Group, 5°11’50”N., 119°54’E., Feb. 21, 
1908, Alb., 1 ovig. female; Labuan Blanda I., Buton Strait, marginal 
coral, Dec. 13, 1909, Alb., 1 female; no. 27, Mariveles, Luzon, June 27, 
1913, A. M. Reese, 3 ovig. females; no. 33, other data as last, 3 females, 
1 ovig. female; near Mariveles, Luzon, 1913, A. M. Reese, 1 female, 3 
ovig. females. 
Marshalls: Sta. VI, BikinilI., outer reef, Aug. 5, 1947, F. M. Bayer, 
1 female. 
MEASUREMENTS.—Males form A, 11-26 mm.; males form B, 12, 
13 mm.; females, 17-24 mm., ovig. females, 13-21 mm. 
Remarxs.—Gordon (1938, pp. 179-185, figs. 4 and 5) discussed 
Neptunus orbitosinus and particularly an unusual specimen with 
eight instead of nine anterolateral teeth and with a more robust male 
pleopod than in one of Rathbun’s cotypes. Stephenson and Campbell 
(1959, p. 144) supported Gordon’s suggestion that she was dealing 
with an undescribed species (Neptunus octodentata) and stated: ‘‘It is 
inconceivable that the variation in pleopod structure within P. 
orbitosinus could encompass the structures she figures (figs. 4c, 4c!).” 
Actually Gordon figured the pleopod of a further variant of a 
“male near to orbitosinus from Admiralty Is. (‘Challenger’ Colln.),” 
which was distinctly longer and thinner than any of the remainder. 
In the present collection, there is a very considerable variation in 
pleopod structure between males which are indistinguishable in 
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