RATHBUN: CRABS FROM THE MALDIVE ISLANDS. 129 
towards the antero-lateral margin. The frontal and orbital region is set off by 
a sinuous groove. 
Fronto-orbital width greater than length of carapace; front divided by a 
deep median notch into two broad oblique rounded lobes having at their outer 
ends a small triangular tooth. 
The superior margin of the orbit has two triangular notches, the outer one 
much the larger; a broad gap below the outer angle. No subhepatic tooth. 
Antennal flagellum sparingly fringed with hair. 
The lateral margin is cut into three teeth besides the outer orbital; the last 
one has a spinule at the extremity. 
Chelipeds unequal. Chelipeds and legs pubescent and hairy, except the 
lower distal portion of the larger palm which is bare, and also the extremity of 
the digits. The surface of the wrist is smooth except toward the inner angle 
where it is spinulous; the angle itself is tipped by a small spine. The outside 
of the palms is covered with subacute granules or tubercles arranged largely in 
rows, and becoming smaller toward the Jower margin; similar granules orna- 
ment the fingers except towards the end. The thumb is short, in the large 
cheliped shorter than its height. 
The legs are rather broad, pubescent, and beset with long hairs on the 
margins. 
Dimensions. — Length of mature female, 5.4 mm.; width, 7.6 mm.; fronto- 
orbital width, 6 mm.; lower width of front, 2.9 mm. 
Type locality. — Nallandu, at anchorage, 24 fathoms, January 18 ; one female. 
This species is near P. sluiters de Man,} but is distinguished by its wider 
carapace, relatively wider across the front and orbits, forming straighter sides, 
its deeper areolation and shorter immovable finger. 
Pilumnus hirsutus Stimpson ? 
Pilumnus hirsutus Stimpson, Proc. Acad. Nat. Sci. Phila., X. 37 [84], 1858. Not 
P. hirsutus HASWELL, 1882, nor BorrapDaAILe, Proc. Zool. Soc. London, 1900, 
p. 581. pl. XLII. fig. 9, and Fauna Maldive Arch., I. pt. III. 245, 1902. 
One young specimen, 3.2 mm. wide, from the centre of Male Lagoon, 30 
fathoms (December 26), seems to be nearer P. hirsutus than any other species. 
The following is Stimpson’s description extracted from his unpublished 
report on the Crustacea of the North Pacific Exploring Expedition: 
“Body and feet hirsute above, not very thickly, with sete of variable but moder- 
ate length. Carapax scarcely areolate, broad; proportion of length to breadth, 
1: 1.45; surface nearly smooth. Antero-lateral margin short, with four sharp 
teeth, including the angle of the orbit; no subhepatic tooth. Inferior margin of 
orbit denticulated. Eyes with rather long peduncles. Front emarginate, with a 
row of long sete just above the margin. Chelopoda rather small; larger hand 
1 See Alcock, Journ. Asiatic Soc. Bengal, LX VII. 194, 1898. 
