THE CANCROID CRABS OF AMERICA 297 



F'. Front plainly double-edged in middle. Dorsal lobe 

 1 L conical, its ridge continued along margin of first 

 lateral tooth. Dark color of both immovable fingers 



of male continued on palm floridanus, p. 297. 



F^. Front faintly double-edged in middle. Dorsal lobe 

 1 L low, oblong, inconspicuous. Dark color of 

 immovable fingers of male not continued on 



palm occidentalis, p. 301 . 



£2. Granulation coarse; dorsal aspect of chelipeds covered with 

 tubercles. Lateral teeth of carapace subconical, hooked, 

 the last three with pointed tips. 



F'. Carapace lobulate; tubercles of chelipeds composed of 

 granules; ambulator}' legs rough with acute gran- 

 ules agassizii, p. 307. 



F^. Carapace not lobulate; tubercles of chelipeds small, not 

 composed of granules; ambulatory legs spinu- 



lous tridentatus, p. 308. 



D^. Last (or most posterior) of antero-lateral teeth directed straight 

 outward. 

 E'. Areolations of carapace crossed by one or more granulated 

 ridges. Transverse branchial ridge behind apex of last 

 marginal tooth reaching to carapace margin. Antero- 

 lateral edge thin taboganus, p. 304. 



E-. Areolations of carapace not crossed by a granulated ridge. 



Antero-lateral edge thick parvulus, p. 305. 



C^. Six lateral teeth including orbital angle sanguineus, p. 302. 



B^. Palms of chelipeds with strong longitudinal ridges. Antero-lateral 



margin strongly dentate snodgrassi, p. 303. 



A . Antero-lateral margins thick and lobed, the lobes more or less angular. 

 Upper inner margin of palm cristate. Color of immovable fingers not con- 

 continued on palm cooksoni, p. 310. 



ANALOGOUS SPECIES OF LEPTODIUS ON OPPOSITE SIDES OF THE CONTINENT 



Atlantic Pacific 



floridanus occidentalis 



agassizii tridentatus 



parvulus cooksoni 



LEPTODIUS FLORIDANUS (Gibbes) 



Plate 137, Figures 1 and 2;' Plate 138, Figure 1 



Chlorodius floridanus Gibbes, Proc. Amer. Assoc. Adv. Sei., vol. 3, 1850, p. 175 



[11] (type-locality, Key West; cotj'pes in Charleston Mus.).^^ 

 Chlorodius limosus Desbonne and Schramm, Crust. Guadeloupe, 1867, p. 30 



(type-locality, Guadeloupe; type not extant). 

 Chlorodius exaratus Dana, U. S. Expl. Exped., vol. 14, Crust., part 2, 1853, p. 1554; 



not C. exaratus Milne Edwards, 1834. 

 Leptodius floridanus A. Milne Edwards, Crust. Reg. Mex., 1880, p. 268, pi. 49, 



figs. 2 and 2a. 



Diagnosis. — Front plainly double-edged in middle. Dorsal lobe 1 L 

 conical, its ridge continued along margin of first lateral tooth to orbit. 



'« According to E. B. Chamberlain the label reads, "Charleston Cabinet. Brought from Key West in 

 numbers, by Doctor Wurdemann in 1845, and lately by Prof. W. H. Harvey." These words precede 

 Gibbes's description. . 



