eran | PROCEEDINGS OF THE NATIONAL MUSEUM. 267 
Antero-lateral spines four, tuberculiform, irregular in shape; the 
first most distinct and surrounded by the tubercles of the hepatic 
region; the second and third each having on its anterior margin a spiny 
tubercle almost as large as the tooth itself. Last tooth single. 
Basal joint of thé antenna with a spiniform tooth at the antero-exter- 
nal angle visible from above, and another farther back almost as large; 
also a smaller tooth at the insertion of the movable joint. 
Chelipeds moderate. Merus tuberculous, armed with six spines on 
the outer margin, a row of smaller spines on either side of the outer 
margin, and three spines on the inner margin. Carpus strongly tuber- 
culous. Hand slightly compressed, smooth, unarmed, showing scat- 
tered punctures under the lens. Fingers stout, prehensile edges 
crenulate, with a slight hiatus at the base. Ambulatory legs with fine 
scattered hairs; meral joints having two longitudinal rows of spines 
above; carpal and propodal joints with short spines above; dactyls 
spiny below. ; 
Color in alcohol reddish; hands of a deeper hue. 
Entire length, 9.2 millimeters; width, including tubercles, 8.9 milli- 
meters. 
Gulf of California, lat. 25° 02’ 15’ N., long. 110° AB’ BOM Wa Ae 
fathoms, sand, shells, station 3002, U. 8. Fish Commission, 1589 (16065). 
In general appearance this species most nearly resembles hispidus; 
the prominences of the dorsal surface, the shape of the front and przeor- 
pital tooth, are very much as in specimens of hispidus of the same size. 
In sinensis, however, the last antero-lateral tooth is not long and con- 
spicuous as in hispidus, and the lateral angle of the carapace is nct well 
defined. 
Mithrax bahamensis, sp. nov. 
Plate xxxvull, fig. 1. 
Carapace longer than broad, oblong-ovate, covered with a close, tough 
pubescence. There is a tuft of hair near the inner angle of the bran- 
chial region; another behind each gastric lobe; and a line of hair 
extending from the rostrum back upon the gastric. Gastric region ele- 
vated. Tubercles of the surface not prominent. There are two on 
the frontal region, one on each gastric lobe, five or six on each bran- 
chial region besides the marginal tubercles, and four in a curve con- 
cave to the posterior margin. 
Front deflexed, composed of two sharp incurved horns; interspace 
broadly U-shaped. 
Antero-lateral margin with four protuberances: one on the hepatic 
region, a spiny tubercle; three on the branchial region of which the 
first two are tubercles, the last a small spine. 
Preocular spine acute, conspicuous; postocular subacute; two inter- 
vening teeth, small. There is a small suborbital tooth besides those of 
the basal joint. 
