54 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
carinae on outer surface of hand, but inner carina represented only by 
double row of enlarged granules. 
Fifth leg: Merus short (L/B=1.2). Posterior border composed of 
rounded granules or spinules. 
Third maxilliped: Anterior border of merus produced forward 
and a little laterally. 
Male abdomen: Penultimate segment about 1.3 times as long as 
broad and with gently curving sides. Ultimate segment about 2.5 
times as long as broad. 
Male first pleopod: Sharply curved near middle and slightly curved 
behind tip which is blunt, and bears only microscopic spinules (see 
fig. 180). 
The present material differs from Crosnier’s (1962) figure (fig. 124) 
in having blunter first anterolateral teeth, epibranchial ridge of cara- 
pace often ending in a swollen granulated patch, and posterolateral 
angle of the carapace generally much sharper. 
In the fragmented specimen from Sta. 5642, Dec. 14, 1909, Alb., the 
left anterior branchial region is swollen as if from a parasite. 
The species is clearly separable from P. macrophthalmus Rathbun, 
P. emarginatus Stephenson, and P. tenuicaudatus Stephenson by dif- 
ferences in the detailed ornamentation of the carapace. 
Distrinution.—Madagascar, Persian Gulf, Ceylon, Hawaii. 
Portunus tweediei (Shen) 
Fiaure 19 
Neptunus (Hellenus) tweediet Shen, 1937, p. 109, fig. 6. 
Portunus tweediei (Shen).—Stephenson and Campbell, 1959, p. 90 (in key). 
Marerrau.—Malay Peninsula: Thailand, entrance to Trat Bay, 
Gulf of Thailand, flat mud bottom, 5 m., 11°58’30”N., 102°44’05”E., 
GVF, Sta. 26, Oct. 29, 1957, 1 fragmented female. 
Philippines: Manila Bay, off Eremita, June 5, 1907, Alb., 1 male, 
2 ovig. females; Manila Bay, Dec. 7, 1907, Alb., 1 male; Manila Bay, 
outside of breakwater, mud, small rocks, Dec. 12, 1907, Alb., 41 
males, 23 females (3 ovig.), 1 juv; Little Harbor at Lunela, Manila 
Harbor, Dec. 12, 1907, Alb., 1 male, 1 female; Tacloban Anchorage, 
about ship, hand dredge, Apr. 12, 1908, Alb., 1 male; Sta. 5346, Cliff 
I., Malampaya Sound, Palawan Is., seine, gravel, rocks, Dec. 29, 
1908, Alb., 1 ovig. female. 
MEASUREMENTS.—Males, 8-21 mm.; females, 7-16 mm.; ovig. 
females, 15-25 mm.; juv., 10 mm. 
Remarks.—The posterior-posterolateral junctions of the carapace 
are possibly more spinous than indicated by Shen; frontal teeth are 
a little more rounded; the postcardiac granular patch is lozenge 
