• THE SPIDER CRABS OF AMERICA 367 



Ambulatory legs very hairy above, first pair reaching to about 

 middle of manus. 



Measurements. — Female (15807), length and ^^^dth of carapace 

 each 17.8; width between outer orbital angles 9.4 mm. Carapace 

 of larger type (Berlin Mus.), sex unknown, length 18.7, width 19, 

 width exclusive of teeth 17 mm. 



Range. — Bahama Banks and Florida Keys to Guadeloupe. 



Material examined. — 



Bahama Banks; May 15-18, 1893; Biol. Exped. State Univ. Iowa; 

 1 male, 5 females (Mus. S. U. I.), 2 females (18674). 



Hawk Channel, Florida; 1903; Fish Hawlc: SYs miles N. M E. of 

 Sombrero Light; 113^ feet; rky. ; Jan. 27; station 7427; 1 male (47072). 

 13^ miles S. by W. of southeast end of Long Key; 15 feet; barry; 

 February 18; station 7463; 1 male (47073). 



Key West, Florida: 1884; Albatross; 1 female (16298). 1885; 

 H. Hemphill; 5 males, 5 females (1 male is holotype of Othonia 

 rotunda) (15807). 



Porto Rico; 1899; Fish Hawlc: Porto Real; February 27; 1 male 

 (24105). Exact locality not given; 1 female (24104). 



Guadeloupe; 1 male (Geneva Mus,). 



Locality unknown; 2 carapaces, cotypes of Cancer mirahilis (Berhn 

 Mus.). 



PITHO SEXDENTATA Bell 



Plate 130, fig. 1; plate 250, figs. 5-9 



Pitho sexdentata Bell, Proc. Zool. Soc. London, vol. 3, 1835 (1836), p. 172 



(type-locality, Galapagos Islands, 6 fathoms, sandy mud; type not 



extant) . 

 Othonia sexdentata Bell, Trans. Zool. Soc. London, vol. 2, 1836, p. 56, 



pi. 12, figs. 1-ld. 

 Othonia inirabilis Gebstaecker, Arch. f. Naturg., vol. 22, pt. 1, 1856, p. 



113 (part).— Gang, Boll. Soc. Nat. Napoli, ser. 1, vol. 3, 1889, pp. 102, 



182. 

 Othonia sexdentata Stimpson, Ann. Lye. Nat. Hist. N. Y., vol. 7, 1860, p. 



192.— A. Milne Edwaud.s, Crust. Reg. Mex., 1875, p. 117 (part). 



Diagnosis. — Carapace oval, narrow across front. Six lateral teeth 

 behind orbital tooth, teeth separated to their bases. Granulation 

 dense. 



Description. — Carapace broadly oval, moderately elevated, the 

 surface rough, granulated and slightly hairy; the lateral margin with 

 six, flattened, triangular, falciform teeth, the points acute and di- 

 rected forward; a ridge of prominent granulations over the posterior 

 margin. (Bell.) 



Notes made at Paris Museum on male from Cape St. Lucas. — Fronto- 

 orbital distance narrow, much as in P. anisodon. Rostral teeth very 

 narrow and sharp or spiniform. Lateral teeth of carapace divided 

 to their bases, acute, margins granulate; the sixth or posterior tooth 



