494 Stimpson on the Crustacea and Echinodermata 
the earapax are nearly perpendicular, and provided with 
tubercles. The whole surface of the body and feet (except- 
ing the pincers and tips of the tarsi) above and below, is 
covered with short, thick hair, which, on the front and sides 
of the carapax and along the angles of the legs, becomes 
longer, stiff, and curled. The rostrum is but slightly de- 
flexed, and not curved ; it is slit two thirds of its length, the 
horns diverging, but slightly turned inwards at their sharp 
extremities. Preorbital spines slender, sharply pointed. 
External antenne long, the flagella reaching much beyond 
the tips of the rostrum. The feet are somewhat triangu- 
larly prismatic; a character best seen in the third joints. 
The fourth articles in the posterior four pairs have a longi- 
tudinal groove on the upper surface. In the first pair the 
fingers are rather slender, and the posterior tooth of the 
movable one is much larger than the others; in this pair 
of feet there are two small spines on the third joint. The 
sternal plastron and abdomen in the male are transversely 
grooved with deep channels corresponding in number to the 
articulations. The color beneath the pubescence is bluish- 
white, the rostrum, spines, and feet being of a bright car- 
mine hue. 
Length of carapax, ĝ Ro ea I o rs 
tbi widia .. . . . . , .p ee 
Length of rostrum a : : : Ee EE 
Distance b i : : i 0.82 
nce between tips of preorbital spines . > > 
7 z “ anterior spines of branchial region — - bp 
Length of 1st pair of legs 
é * 9d 23 y . 440 
Found at the island of San Miguel, off the coast of Cal- 
ifornia, near San Pedro. This is another of the novelties 
for which we are indebted to that indefatigable bates 
Lieut. TrowsrmeE, who, though devoting his chief atten- 
tion to the Vertebrata, has succeeded in making collections 
of the lower forms of animal life, of greater extent and inter- 
est than has any other student of Californian Zoology. 
Mus. Smithsonian. 
