1879.] 155 [ Kingsley. 
are squamiform and nearly obsolete, but in front are prominent and 
almost spiniform. Areolations but faintly marked. Front depressed 
with two prominent lobes separated by a fissure, and each lobe armed 
with a varying number (three to five) acute spines. The lobes are 
emarginate near the orbit, at the angle of which is a single stout 
spine. Orbits with distant spines above and below. Antero-lateral 
margin with three strong spines, and beneath and in front of the first 
of these is another. Pterygostomian region tuberculate. Meros of 
chelipeds with a spine, at the upper distal angle an emargination in- 
terior to this spine, behind which is a second spine; carpus and pro- 
podus with strong spines and hairs on the upper and outer surfaces, 
which below are arranged in rows and become tuberculiform; fingers 
dark brown, almost black. Ambulatory feet with long hairs on all 
the joints, and slender spines on the carpal, meral, and distal portion 
of the ischial joints. 
Gulf of California. W.N. Lockington. 
Length of carapax, &, 11 mm., ?, 17.8 mm.; breadth, 3, 16.7 mm., 
Pae2+8 mimn.: ratio, do, 1: 1:52! 9,1: 1.41. 
Pilumnus dasypodus sp. n. 
Carapax transversely nearly flat, but longitudinally strongly ar- 
cuate, smooth behind but with the areolations moderately distinct 
anteriorly, clothed with long clavate hairs and stiff setae. Front de- 
pressed, prominent, two lobed, the lobes being separated by a deep 
narrow fissure, and each armed with minute teeth. Orbits with dis- 
tant spines above and below, hiatus wanting. Antero-lateral margin 
with three strong simple spiniform teeth besides the one at the angle 
of the orbit. No spines on the hepatic or pterygostomian regions. 
Chelipeds unequal, carpus and propodus armed above with strong 
spines, stiff setae and long clavate hairs which on the smaller hand 
extend on the external surface where the spines become tuberculi- 
form, and are arranged in distinct rows; fingers short, stout, den- 
ticulated. Ambulatory feet stout, compressed. 
Key West, Florida. A. S. Packard, Jr. 
Length of carapax, 3, 5 mm., ?, (with eggs) 6.2 mm.; breadth, ¢, 
7.2 tam., 2, 8.8 mm.; ratio, 7, 1: 1.44, ¢, 1: 1.42. 
This form is distinguished from P. aculeatus by the absence of 
spines on the hepatic region, from P. Xantusii, gemmatus, reticulatus, 
ceratopus, marginatus, Agassizii, caribaeus, floridanus, granulimanus, 
lacteus and nudifrons by having the orbits with spines above and 
below; from P.depressus in the simple character of the antero-lateral 
