52 PROCEEDINGS OF THE NATIONAL MUSEUM

China: S.1165, China, 1925-1927, Arthur de Sowerby, 1 female.

(Probablylike the last specimen, this

came from

Singapore.)

Measurements. —

Males, 45-180

mm.;

females, 45-90

mm.

Remarks. —

^{ThisspeciesisveryclosetoP.pelagicus,}

^and

^thediffer-

ence in the fronts is

shown

better

by

figures than

by words

(fig. 17).

The male

pleopodsarealsoverysimilaralthoughtheoverallcurvature in P. trituberculatus departs farther

from

the circular than with P.

pelagicus (see Stephenson

and

Campbell, 1959, fig. 2A). Additional materialwillberequired to determine

whether

the detailsof terminal armature do differsHghtly in the

two

species.

Distribution.

— ^{China and Japan}

(Sakai, 1939).

Figure 18.

—

Portunustuherculosus (A. MilneEdwards), male, Philippines,Sta.5159, Alb.:

a, pleopod;b,pleopodtip,upper surface;c,abdomen. (Scales=a, 1 mm.; b,0.5 mm.;

c,5mm.)

Portunustuherculosus (A. Milne Edwards) Figures 18; Plate 6b

Neptunus tuherculosus A. Milne Edwards, 1861, pp. 333-334, ^{pi. 31 (fig. 5).}

Neptunus(Amphitrite) tuherculosusA. Milne Edwards.

—

Miers, 1886, p. 176.

Neptunus (Hellenus) tuherculosus A. Milne Edwards.

—

Alcock, 1897, pp. 42-43.

Portunus tuherculosus (A. Milne Edwards).

—

^{Stephenson and Campbell, 1959,}

p.89 (inkey).—Crosnier, 1962, pp. 69-71, ^figs.97-98, 124-127.

Material. —

^{China: Sta. 5309,}

^China

^{Sea, vicmity}

^{Hong Kong,}

21°53'N., 115°51'E., 62 fm., green

mud, Nov.

4, 1908, Alb., ¹ female.

Philippines: Sta. 5104,

China

Seaoffsouthern Luzon, 14°45'48''N., 120°12'20" E., Jan. 8. 1908, Alb., 1 male, 1 female, 1 ovig. female;

53

Sta. 5159, Tinakta I., Sulu Archipelago,

Tawitawi

Group, 5°11'50"

N., 119°54'E ., Feb. 21, 1908, Alb., 1 male; Varadero Bay,

Mindanao,

10:30-11:30, electric light, July 22, 1908, Alb., 1 female; Sta. 5442, west coast of Luzon, South

Fernando

Point Light, 16°30'36"N., 120°ir06''E., 45 fm., coarse sand.

May

11, 1909, Alb., 7 males, 1

female, 2 ovig.females; Sta. 5478,

Tacbuc

Point, (Leyte), ^10°46'24'' N., 125°16'30''E., July 29, 1909, Alb., ¹ female; Sta. 5642,

Buton

Strait, 4°3r40"S., 122°49'42''E., 37 fm., grey

mud,

Dec. 14, 1909, Alb., 1 male.

Palau: Sta. 125-1187 Palau I., about

1^

mi.

NE.

of

Ngabadongu,

7°17'36"N., 134°2r42''E., 17fm., Aug.24, 1955,

GVF.,

1 female.

Measurements. —

^{Males, 18-49}

mm.;

females 15-30

mm.;

ovig.

females, 21-26

mm.

Remarks. —

^{Originally it}

was

suspected that

two

different species were present,

some

being

more

strongly

embossed and

possessing spiniform tubercles

on

the cardiac

and

lateral postcardiac regions of the carapace. Later intergrades were found.

The

following, the only adequate description in English, amplifies Crosnier's (1962) French description.

Description.

—

Front: Projecting, fourround, approximately equal lobes,

medians

the

more

prominent.

Anterolateral teeth: Irregularly sized

and

spaced, first

and

second almostconfluent, fourth

and

sixth small

and

depressed, third

and

fifth

with enlarged granular bases, ninth the longest.

Carapace:

Moderately

broad (B/L.

=

1.6-1.7). Regions varying

from

moderately to very strongly embossed,

and

carrying

beaded

granules or occasionally tubercles. Strongly depressed posterior to protogastric

and

mesogastric areas.

Main

granular patches as fol- lows: Protogastrics subdivided into two; mesogastrics, typically

two

oblique patches; metagastrics, transverse ridgewithanteriorprolonga- tion; cardiacs either an elevated patch, or pair of patches, or pair of elevated granular tubercles; lateral postcardiacs elevated

and some-

times bearing tubercles;

median

postcardiac present; anterolaterals diffuse; epibranchials with

marked

change in curvature near middle

and

interrupted oncervicalgroove to

form

discretepatch; three meso- branchials; diffuseposterolateral.

Chelipeds:Elongate,right slightlythestouter.

Upper

surfacescov- ered with

beaded

granules

and

lower surfaces, particularly of hands, bearing

squamiform

markings. Anterior border of

arm

bearing

two

spines typically followed

by

a tubercle, occasionally

by

a third spine.

Posterodistalborderwithsingle spine. (Crosnier describes

two

teeth, the second "meritant a peine le

nom

de dent.") Wrist normal.

Upper

surface of

hand

bearing three granular carinaeof

which

inner-

most

terminates in distal spine or spiniform tubercle. Conspicuous

54 PROCEEDINGS OF THE NATIONAL MUSEUM

^{vol. 120}

carinae

on

outer surfaceofhand, butinner carinarepresented only

by

double

row

ofenlarged granules.

Fifth leg:

Merus

short (L/B=1.2). Posterior border

composed

of

rounded

granules or spinules.

Thu'd maxilliped: Anterior border of

merus

produced forward

and

alittlelaterally.

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

firstpleopod: Sharplycurved nearmiddle

and

slightlycurved behind tip

which

is blunt,

and

bears only microscopic spinules (see fig. 186).

The

presentmaterial 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.

Inthe fragmented specimen

from

Sta. 5642, Dec. 14, 1909, Alb., the left anteriorbranchial regionis swollen as if

from

aparasite.

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.

Distribution.

—

Madagascar, Persian Gulf, Ceylon, Hawaii.

Portunustweediei (Shen) Figure 19 Neptunus (Hellenus) tweedieiShen, 1937, p. 109,fig. 6.

Portunus tweediei (Shen).

—

StephensonandCampbell, 1959,p. 90 (inkey).

Material. — Malay

Peninsula: Thailand, entrance to Trat Bay, GulfofThailand,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

PORTUNID CRABS — STEPHENSON AND REES 55