THE SPIDER CRABS OF AMERICA 393 



Cabo Cruz, Cuba; 2 fathoms; Henderson and Bartsch; 2 young 

 (50532). 



Jamaica; 3 to 6 fathoms; 1 large male (Kiel Mus.). From Marine 

 Biol. Lab. Woods Hole; 1 young female (47354). 



Ensenada Honda, Culebra Island; February 9, 1899; Fish Hawk; 

 1 very young (24184). 



Off Vieques, Porto Rico; Culebritas Lighthouse, N. }4 E., 7}/^ 

 miles; 21 fathoms; Co.; February 8, 1899; station 6089, Str. Fish 

 Hawk; 1 young (24207). 



St. John; 1 male, 1 female (Copenhagen Mus.). 



St. Croix; 1 female (Copenhagen Mus.). 



West Indies; received from Copenhagen Mus.; 1 immature female 

 (19697). 



Other records. — Tortugas, Florida; low-water mark and 7 fathoms 

 (Stimpson) . 



MITHRAX (MITHRAX) BAHAMENSIS Rathbun 



Plate 137, figs. 1 and 2; plate 259, fig. 1 



Mithrax bahamensis Rathbun, Proc. U. S. Nat. Mus., vol. 15, 1892, p. 267 

 pi. 38, fig. 1 (type-locality, Andros Island, Bahamas; holotype male, Cat, 

 No. 42513, U.S.N.M.). 



Diagnosis.— ElongSite, ovate-oblong. Tubercles hidden by a dense 

 pubescence. A small postero-lateral tubercle. 



Description. — The carapace in its elongate, oblong-ovate shape 

 resembles that of holderi. It is covered with a close, tough pubes- 

 cence; there is a tuft of hair near the inner angle of the branchial 

 region; another at the hinder end of each protogastric lobe; and a line 

 of hair extending from the rostrum back upon the gastric region. 

 Tubercles of carapace few and not prominent; one epigastric (paired), 

 one protogastric (paired), 5 or 6 dorsal branchial (paired), 4 in a 

 curve concave to the posterior margin. Rostral horns triangular, 

 tips incurved, sharp. Preocular spine stout, acute; postocular spine 

 curved, blunt; two intervening teeth, of which the inner one is minute. 

 Four lateral conical protuberances, the posterior one most prominent, 

 ending in a sharp, hooked spine; hepatic protuberance with an acute 

 tip; the two intermediate protuberances subacute and less prominent. 



Three spines on basal article of antenna, the middle one large, 

 curved inward and nearly as advanced as front. Remainder of 

 antenna with lateral fringes of long hair. 



Chelipeds a little longer than first pair of legs, pubescent; a row 

 of tubercles on upper margin of merus; 1 or 2 tubercles near proximal 

 end of carpus; manus smooth. 



Legs flattened above and fringed on either side with long hair; 

 merus armed with two rows of small spines and tubercles, carpus with 

 two tubercles arranged transversely at the middle, and propodus 

 with one tubercle at the middle. 



