Boone, Crustacea, Cruises of ''Eagle" and " Ara," 1921-28 123 



Synonymy. — Lanibrus pourtalesii Stimpson, Bull. Mus. Comp. Zool., 

 vol. 2, p. 129, 1871. — A. IMilne Edwards, Crust. Reg. Mexico, p. 

 149, pi. 30, figs. 2-2d, 1878. 



Lambrus verrillii Smith, Proc. U. S. Nat. Mus., vol. 3, p. 415, 1881; 

 Kept. U. S. Fish. Comm. for 1885, p. 628, pi. 2, fig. 2, 1886. 



Lambrus pontalesii (pourtalesi intended) Gundlach and Torralbas, 

 Ann. Acad. Habana, vol. 36, text fig. on p. 302, 1899 (1900) ; 

 reprint, pi. 2, fig. 4, 1917. 



Parthenope (Platylamhrus) pourtalesii Rathbun, Bull. 129, U. S. 

 Nat. Mus., p. 521, pis. 182, 183 and 276, 1925. 



BRACHYNCHA. 



Family : Xanthidae. 



Genus : LEPTODIUS A. Milne Edwards. 



Leptodius floridanus (Gibbes). 



Plate 38, figs. A and B. 



Type: This species was founded on material in the Charleston, 

 S. C, Cabinet, brought from Key West, Fla., in numbers by Dr. 

 Wurdemann in 1845 and later by Prof. "W. H. Harvey. 



Distribution : Littoral from the Florida Reefs, southward through 

 the West Indies and Bermudas, to Abrolhos Islands and Maceio, 

 Brazil. 



Material examined: One male and one female from Pigeon Key, 

 Florida, April 19, 1923, collected by the ''Ara/' 



Technical description: Carapace about three-fifths as long as 

 wide, with the anterolateral margins convex, toothed, the postlateral 

 margins decidedly convergent, the posterior margin about as long as 

 the interorbital region and with a flat carina. The frontal margin is 

 composed of two wide truncated lobes, separated from each other by 

 a narrow, V-shaped sinus and with the margin of each slightly sinuate 

 and thickened, separated from the relatively inconspicuous preorbital 

 angle by a clear-cut sulcus. The inferior preorbital angle forms a 

 blunt tooth, visible dorsally ; the postorbital angle is also a blunt tooth, 

 well separated from the first anterolateral tooth by a sulcus ; there is 

 a small, subhepatic tooth visible below and between the postorbital 

 and the first anterolateral tooth ; there is one closed sinus on the in- 

 ferior orbital border near the outer angle and vestiges of two closed 



