THE CANCROID CRABS OF AMERICA 305 



Description. — Carapace suboval; anterior two-thirds crossed by 

 granulated rugae ; a well-marked straight transverse ridge runs across 

 the branchial region in line with posterior border of gastric region and 

 just behind the transverse ridge which runs inward from tip of last 

 lateral tooth. Lobule 1 L small, a dimple at its middle, 3 L and 4 L 

 marked by an obtuse-angled line of granules; 2 M divided only half 

 way longitudinally. Front nearly transverse, composed of two lobes 

 separated by a V-shaped notch, each lobe very slightly concave and 

 more advanced at inner than at outer angle. Of the five antero- 

 lateral teeth (which include orbital angle), the second, third and 

 fourth are broad, shallow and obtuse-angled, second and third blunt, 

 fourth subacute, fifth nari'ow, acute, pointing directly outward. 

 Lower margin of orbit unusuallj^ prominent, especially the inner 

 tooth. 



Outer surface of wrist and upper half of exposed surface of palm 

 coarsely granulate, and rough with irregular depressions and ridges. 

 The black of the immovable fingers is continued back on the palm; 

 tips of all fingers spooned. Legs frmged with hair. 



Color. — Sage greenish in general, mottled with some lighter traces 

 of pea green (Schmitt). 



Measurements. — Male holotype, length of carapace 12.6, width 20, 

 fron to-orbital width 21, front 5.6 mm. 



Range. — Panama to Ecuador. 



Material examined. — Panama; S. E. Meek and S. F. Hildebrand, 

 Smithsonian Biological Survey of the Panama Canal Zone: Taboga 

 Island, Bay of Panama; May 11-15, 1911; 2 males (1 is holotype) 

 (43658), 1 male (Field Mus.), 1 female (44198). Balboa, Canal Zone; 

 February 7, 1912; 1 female (59306). 



Panama; 1924; E. Deichmann: Pacific shore; low tide, rocks; May- 

 July; 1 male (60750). Entrance of canal. Pacific side; July; 1 male 

 (60749). 



Salinas, Ecuador; September 12-14, 1926; W. L. Schmitt; 17 males, 

 3 females (60897, 60898). 



LEPTODIUS PARVULUS (Fabricius), new combination 



Plate 141, Figures 1-3 



Cancer parvulus Fabricius, Ent. Sys. Auct. et emend., vol. 2, 1793, p. 451 (type- 

 locality, in Americae meridionalis Insulis; type probably in Kiel Mus.). 

 Chlorodius americanus Saussure, Mem. Soc. Phys. Hist. Nat. Geneve, vol. 14, 



1858, p. 430, pi. 1, fig. 5 (type-locality, Haiti; type in Geneva Mus.). 

 Chlorodius floridanus Stimpson (not Gibbes), Amer. Journ. Sci., ser. 2, vol. 27, 



1859, p. 446. 



Xanlhodius americanus Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, 1860, 



p. 209 [81]. 

 Lepiodius americanus A. Milne Edwards, Crust. R6g. Mex., 1880, p. 269. 

 Xanlhodius parvulus Rathbun, Ann. Inst. Jamaica, vol. 1, 1897, p. 15. 

 79856—30 21 



