THE SPIDER CRABS OF AMERICA 349 



margins undulate and finely crenulate; the carpus joints have a 

 bilobed superior crest and a tooth on inferior margin; propodal joints 

 with a narrow crest on each side and a blunt spine above. 



Color, reddish (Desbonne), or bright red, with yellow patches 

 (Stimpson.) 



Measurements.— Male (46740), length of carapace 11.8, width of 

 same 10.2 mm. 



Hahitat. — The broken pieces of coral lying in the fringing shallows 

 of the cAys frequently have bits of briglit red sponge scattered over 

 them, and it is on such broken pieces that this crab occurs. It is 

 almost impossible to distinguish it from the sponge alongside, omng. 

 to the close imitation in size, outline, and color, and to its remaining 

 motionless till all danger is apparently over. As the resemblance is 

 so perfect as to deceive the keenest eyes, it is certain that the mimicry 

 must secure absolute safety from the many marine creatures which 

 roam about seeking what they may devour. (P. W. Jarvis, in The 

 Jamaica Post, December 16, 1897.) 



Range. — Florida Keys; West Indies to Curasao. 



Material examined. — 



Key West, Florida; 1885; H. Hemphill; 3 males, 1 female (14442). 



Sand Key, Florida; reef; J. B. Henderson: 1 ma 

 (46740). May, 1913; 1 male (46045). 



Bush Key, Tortugas; June, 1921; Paul Bartsch; 

 2 males (56218). 



Tortugas Reefs, Florida; J. B. Henderson: 2 

 males, 1 ovigerous female (46739). 1912; 1 male 

 (45679). 



Tortugas, Florida; June 5-8, 1893; State Univ. 

 Iowa Biol. Exped.; 1 female (Mus. S. U. I.). 



Jamaica; 1891; T.H.Morgan; 1 female (17211). fig. ii2.-thoe puel- 



Ponce, Porto Rico; reefs; January 30, 1899; Fish jj/sal antennal 

 Hawlc; 1 male (24220). article and sub. 



St. Thomas; 1884; Albatross; 1 female (16201). hepatic region, x 9 



Caracas Bay, Curasao; in coral; 1920; C. J. van der Horst; 1 male, 

 2 females (1 ovig.) (Amsterdam Mus.); 1 female (56858). 



THOE SULCATA SUmpson 



Plate 125, figs. 3 and 4 



Thoe sulcata Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, 1860, p. 177 

 (type-locality, Cape St. Lucas, Lower California; cotj-pes, Cat. No. 1222, 

 M. C. Z.). — A. Milne Edwards,' Crust. Reg. Mex., 1875, pi. 19, figs. 

 5-5e; 1878, p. 121. — Stueets and Kingsley, Bull. Essex Inst., vol. 9, 1877 

 (1878), p. 104. 



Platypes edentata Lockington, Proc. California Acad. Sci., vol. 7, 1876 

 (1877), p. 41 [1], p. 65 [3] (type-locality, Mazatlan; type not extant). 



