196 University of California Publications in Zoology [Vou 23 
curved setae above. No supraocular tooth or spine; the area between the two pro- 
jecting rims of the orbits is concave; there is no tooth at the posterior margin of 
orbit, but there may be a small one a short distance behind it. Basal joint of 
antennae with a longitudinal ridge on its posterior half or two-thirds with a 
groove on either side. Chelipeds of male robust; hand oblong, ineurved, palm 
inflated, fingers shorter than the palm, gaping at base and meeting along distal 
half or two-thirds of their length; chelipeds of female are smaller and more 
slender; hands subcylindrical, fingers nearly straight. 
Dimensions.—Type, male: length 19.1 mm., width 8.4 mm. 
Type Locality—San Diego, California. 
Distribution—From Monterey Bay, California, to Gulf of California. Re- 
corded from 8 to 47 fathoms, and perhaps occurs in shallower water (Rathbun). 
Remarks.—This species was fairly common among the masses of red seaweed 
dredged from a depth of 10-20 fathoms. They are marked with reddish brown, 
but are always so covered over with decorative fragments of seaweed that even 
their form is almost indistinguishable. In the aquarium these creatures were 
very interesting. Their principal occupation was that of decorating themselves. 
Seizing a fragment near one end, that end was thrust into the mouth and chewed 
for some time, then transferred to some part of the carapace or legs, and by means 
of a peculiar and oft repeated twisting movement of the head [hand?] it was so 
firmly fastened that it would under almost all circumstances remain in the position 
in which it had been placed. The chewing led us to suspect a cementing element in 
the saliva, but on examination of the carapace it was found that each piece of 
seaweed was impaled on several of the stiff recurved hairs which occur in clumps 
over the carapace and legs (Nininger). 
Genus Anasimus Milne Edwards 
Carapace pyriform, convex, regions well defined: rostrum simple, slender; post- 
orbital and supraorbital spine present. Basal article of antennae long and narrow, 
with spine at distal end. Abdomen and sternum granulate. Ambulatory legs 
very slender, decreasing more or less in length from first to fourth pairs, about 
twice, or more than twice, the length of the carapace; dactyls long. 
Anasimus spinosus (Rathbun) 
Erileptus spinosus Rathbun, Proc. U. S. Nat. Mus., 16, 227, 1893; Holmes, 
Oceas. Papers Calif. Acad. Sci., 7, 21, 1900; Rathbun, H. A. E., 10, 
171, pl. 10, fig. 1, 1904; Weymouth, Stanford Univ. Publ., Univ. Ser., 
no, 4) ps2.) plas) He. LOMO: 
Anasimus rostratus Rathbun, Proc. U. 8S. Nat. Mus., 16, 226, 1893; H. A. 
E., 10, 171, pl. 10, fig 45 1904. 
Characters.—Carapace spinous; two spines on the median line, one on posterior 
part of gastric region, the other on cardiac; there are two spines on each branchial 
region and one on each protogastriec region; lateral margins spinulous; rostrum 
slender, spinulous on margin; supraorbital spine prominent; postorbital spine in 
male small and at some distance from the eye, in female prominent and close to 
eye, defining the orbit. Chelipeds of male long and slender, about three times 
as long as carapace; hand slender, slightly flattened vertically, increasing in width 
toward distal end; fingers arched, gaping for one-half their length; dactyl about 
one-fourth total length of hand. Chelipeds of female weak, about one and one- 
half times as long as carapace; hands granulous; fingers nearly as long as palm 
(about one-half total length of hand), not gaping, in contact. 
