THE CANCROID CRABS OF AMERICA 303 



Leplodius exaratus var. sanguineus Cano, Boll. Soc. Nat. Napoli, ser. 1, vol. 3, 



1889, p. 203. 

 Xantho exaratus var. sanguinea Ortmann, Zool. Jahrb., Syst., vol. 7, 1893, p. 447. 

 Xantho (Leptodius) sanguineus Alcock, Journ. Asiat. Soc. Bengal, vol. 67, 1898, 



p. 119; not Chlorodius edwardsi Heller. 



Diagnosis. — A small tooth on the postero-lateral margin. Dark 

 color of immovable fingers of male continued well back on palm. No 

 fine transverse granulate lines on lobules of dorsal surface of carapace. 



Description. — Related to floridanus and occidentalis but distinguish- 

 able at once by an additional though small tooth on the lateral margin, 

 behind the lateral angle and therefore postero-lateral. Lobules of 

 dorsal surface smooth, lacking the fine transverse striae of the above- 

 named species. 2 L, 3 L, and 4 L subtruncate on the steep side to- 

 ward the carapace margin. 1 L oblong, independent, 2 M longi- 

 tudinally divided for fully half its length. Frontal margin thick 

 sinuous, median emargination shallow, a short closed fissure behind it. 

 Lateral teeth subacute; D tuberculiform, E and N shallow, obtuse- 

 angled, T pointing forward or a little inward, S and the postero-lateral 

 tooth directed obliquely outward and forward. Wrist and palm 

 rough above; a veiy short conical tooth at inner angle of wrist. 

 Fingers broadly spooned; dark color of immovable fingers of male 

 continued well back on palm. Abdomen of male narrow. 



Color. — With orange, reddish and white spots. 



Measurements. — Male (Paita), length 21.5, width 34 mm. (Cano). 



Range. — Indo-Pacific region from the Red Sea and Mauritius to 

 Australia, Loo Choo Islands, Marcus Island, and the islands of the 

 eastern Pacific, the Hawaiian, Marquesas and Paumotu Islands. 

 Paita, Peru (Cano), the only American record. 



LEPTODIUS SNODGRASSI Rathbun 



Plate 139 



Leptodius snodgrassi Rathbun, Proc. Washington Acad. Sci., vol. 4, 1902, p. 279, 

 pi. 12, figs. 7 and 8 (type-locality. Black Bight, Albemarle Island, Gala- 

 pagos; type, Cat. No. 24831, U.S.N.M.). 



Diagnosis. — Antero-lateral margins strongly toothed. Protogastric 

 regions longitudinally divided for less than half their length. Wrist 

 and hand deeply dimpled; hand with five longitudinal ridges, three 

 outside, two above. Color of immovable finger extending on palm. 



Description. — Carapace deeply areolated in anterior two-thirds; 

 the areoles generally marked anteriorly by a transverse or nearly 

 transverse line of granules from which the surface falls steeply down; 

 epigastric lobes prominent; protogastric lobes partially longitudinally 

 divided, the outer half itself divided in two crosswise; 2 L and 3 L 

 fused, a short groove paralleling the anterior border; 5 L short and 

 broad; D and 1 L united by a blunt ridge; 4 L roundish. E blunt 

 and obtuse, N larger, dentiform, T and S acute, slightly curved at 



