40 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
Form II: Philippines: Sta. 5159, Tinakta I., Sulu Archipelago, 
Tawitawi Group, 5°11’50”N., 119°54’E., Feb. 21, 1908, Alb., 2 males 
(ca. 21, 30 mm.), female (23 mm.), ovig. female (25 mm.); Sta. 5160, 
Tinakta JI., Sulu Archipelago, Tawitawi Group, 5°12’40’N., 
119°55/10”E., 12 fm., sand, Feb. 22, 1908, Alb., 2 females (17, 18 
mm.); Sta. 5169, Sibutu I., 4°32715”N., 119°22’45”E., 10 fm., 
Feb. 27, 1908, Alb., 2 females (both 16 mm.). 
MEASUREMENTS.—Form I: Males, 16-36 mm.; females, 15-38 mm.; 
ovig. females, 16, 32 mm., juvs. unsexed, 8-17 mm.; juv. male, 17 
mm.; juv. females, 12-15 mm. 
FreaTuRES IN comMoNn.—Front: 3-toothed, middle tooth usually 
the smallest and least projecting. 
Cheliped: Robust but elongate. Posterior border of arm with 
single spine, anterior border with three spines, distal being widely 
separate from remainder. Ventrodistal extremity of arm bearing boss 
with small spine. Hand with upper surface bearing two granular 
carinae of which only inner ends in a subterminal spine; outer surface 
Ficure 10.—Portunus rugosus (A. Milne Edwards): 
Male abdomen, New Caledonian specimen 
from Muséum National d’Histoire Naturelle. 
(Scale=1 mm.) 
with two upper carinae clearly distinguishable and granular, but with 
lowermost merging into granulation of under surface; under surface 
with regular rows of granules giving a squamiform effect; inner surface 
with central row of carina of rounded granules (except in one juvenile). 
Anteroexternal angle of merus of third maxilliped: Produced 
forward. 
Ventral surface of thorax: Bearing conspicuous beaded granules. 
Dorsal surface of carapace: With hairy pile, through which project 
conspicuously elevated granular regions. These are more numerous 
than those figured by Stephenson and Campbell (1959, fig. 1b), and a 
modified terminology is adopted as shown in figure 8. Additional 
granulated areas are a pair of postfrontals and pair of post orbitals 
typically divided into three indistinct subareas. Gastric region with 
distinct median gastric patch with protogastrics and mesogastrics on 
each side, and metagastric behind. Protogastrics small, and typically 
