Boone, Crustacea, Cruises of "Eagle" and "Ara," 1921-28 89 



longer in quadridentata than in anisodon, her photographed specimens 

 fail to show such difference. 



Synonymy. — Othonia anisodon von Martens, Arch, fur Naturgh., vol. 

 38, part 1, p. 83, pi. 4, fig. 3, 1872. 



Othonia aculeata Kingsley, Proc. Acad. Nat. Sci. Phila., 1879 (issued 

 1880), p. 388, part. 



Othonia Iherminieri Rathbun (not Schramm), Pros. U. S. Nat. Mus., 

 vol. 15, p. 255, pi. 34, figs. 3 and 4, 1892 (part). 



Pitho anisodon Rathbun, Ann. Inst. Jamaica, vol. 1, art. 1, p. 8, 1897 ; 

 Bull. Labr. Nat. Hist. State Univ. Iowa, vol. 4, p. 258, 1898 ; Bull. 

 U. S. Fish. Comm., vol. 20, part 2, p. 77, 1901 ; Bull. 129, U. S. 

 Nat. Mus., p. 368, pi. 131, pi. 151, fig. 2, text fig. 118, 1925. 



Genus: MITHEAX Latreille. 



Subgenus : Mlthrax Rathbun. 

 Mithrax (Mithrax) hispidus (Herbst). 



Plate 27. 

 Name : Coral crab. 



Diagnostic characters : This exquisite crab belongs in the group 

 of Mithrax, which have the carapace devoid of oblique branchial sulci. 

 It is readily recognized by the presence of three anterolateral spines, 

 the first of which is bifid, and one postlateral spine ; the rostral sinus 

 is U-shaped, subequal to either horn; there are two well-developed 

 spines on the anterior margin of the meral joint of the chelipeds. 



Type: Herbst failed to cite the locality of his type, which is de- 

 posited in the Berlin Museum. 



Distribution : This species has been sparingly recorded from Dela- 

 ware Bay by Thomas Say; from off Charleston Harbor, S. C, and off 

 Georgia by Gibbes, which records are quite probably due to stray 

 specimens swept northward by the mighty Gulf Stream. Mithrax 

 hispidus is well known on the Florida coast southward from Miami ; 

 from the Bahamas, Jamaica, the Bermudas, Curasao, and from half 

 a dozen localities in Brazil, of which Rio de Janeiro is the southern- 

 most record. 



