200 University of California Publications in Zoology (Vou. 23 
abdominal segment, pointing upward and backward. Rostrum acute; tips of post- 
orbital spines pointing forward; upper margin of orbit prominent but without 
supraocular spine. Basal antennal joint with outer margin prolonged into a 
slightly ineurved spine. Sternum conspicuously granulate, or tuberculate, pubescent, 
deeply grooved between segments. Chelipeds of male short, rather stout, granu- 
late; hand broad, inflated; fingers nearly as long as palm, gaping at base. 
Chelipeds of female more slender than in male; margins of hand parallel; fingers 
slightly gaping. 
a b 
Fig. 123. Inachoides tuberculatus, g, X 1%; a, dorsal; b, ventral view (from 
Rathbun, U. S. N. M.). 
Dimensions—Types, male: length 19.1 mm., width 14 mm.; female: length 
14.2 mm., width 9.7 mm. 
Type Locality——San Diego Bay, California. 
Distribution—From Monterey Bay, California, to Panama Bay, Panama, 
4 to 45 fathoms (Rathbun). 
Remarks—Inachoides magdalenensis and Dasygyius tuberculatus are apparently 
one and the same species, and at Miss Rathbun’s suggestion I have here com- 
bined them. 
IT. Basal joint of antennae not extremely slender, often very broad; length less 
than the distance between lower orbital margins, usually in the proportion 
of two to three. (Group I, p. 194.) 
Genus Epialtus Milne Edwards 
Carapace smooth or slightly tuberculated; margins not incised, with two or 
more lateral projections, sometimes very largely developed. Rostrum broad, 
triangular or oblong, bifid, or two spined, or entire. Basal antennal joint enlarged 
at base and narrowing distally; flagellum of antennae concealed beneath the 
rostrum. Preocular spine present or absent. Ambulatory legs stout, subeylin- 
drical. 
