THE CANCROID CRABS OF AMERICA 289 



bulatory legs have a feltlike brush of hair above and below, covering 

 the greater part of the article. 



Color (after plate of Milne Edwards and Lucas). — General color 

 ox-blood red with spots on carapace of mikado orange and pinard 

 yellow and extensive mottlings of the latter on chelipeds; ambulatory 

 legs reticulated with cadmium yellow. 



Measurements. — Female (14364), length of carapace 98, width 151.5, 

 fronto-orbital width 38.2, width of front 24.7 mm. 



Remarls. — Common on sandy shores; edible (Poeppig). 



Range. — From Ecuador to Chile. 



Material examined. — 



ECUADOR. — Guayaquil; specimens in Copenhagen Museum. 



CHILE.— Antofagasta; November 15, 1926; W. L. Schmitt; 2 

 young, about 3.5 mm. wide (60743). 



Valparaiso: U. S. Exploring Expedition; 1 male (14848). Novem- 

 ber, 1883; Dr. W. H. Jones, U. S. Navy; 2 females (14364, 46340). 

 April, 1920; Edwyn Reed; 6 young (Buenos Aires Mus., 10805). 



Lota: January 16, 1927;- W. L. Schmitt; 25 young (60882). 



Quetelmahue, Chiloe; June, 1924; Carlos Reed; 1 male (60883); 

 received from Buenos Aires Museum. 



Chile: C. E. Porter; 1 3^oung (46030). Origin unknown; 1 major 

 chela (59376). 1 male, 5 young (Mus. Paulista, 1306). F. Silvestri; 

 1 young male, lent by Buenos Aires Mus. (4673). 



Port Otway; February 10, 1888; Albatross; 3 males, 1 female (21994). 



Genus CYCLOXANTHOPS Rathbun 



Cycloxanthus A. Milne Edwards, Ann. Sci. Nat., ser. 4, vol. 20, 1863, p. 278; 

 type, C. sexdecimdentatus (Milne Edwards and Lucas); Crust. Reg. Mex., 

 1879, p. 258. Cycloxanthvs used by H. Milne Edwards, 1850, in d'Archiac's 

 Hist. Prog. G^oL, vol. 3, p. 304A;, for a different genus of crabs found fossil. 



Cydoxanthops Rathbun, Proc. Biol. Soc. Washington, vol. 11, 1897, p. 164; sub- 

 stituted for Cycloxanthus, preoccupied. 



Carapace rather narrow; front horizontal, prominent, and divided 

 by a closed median fissure into two lamellar truncate lobes, and sep- 

 arated from internal orbital angles by a deepish notch. Orbits small; 

 two fissures in supra-orbital margin; external orbital angles incon- 

 spicuous, continuous with antero-lateral borders. Antero-lateral 

 borders very long, strongly curved, extending far backwards. In the 

 American species nine lateral teeth, besides the orbital tooth, the 

 last two small and post-lateral. Basal antennal article short, but 

 touching the front at its inner angle; flagellum inserted in orbital 

 hiatus. Merus of external maxillipeds subquadrilateral. Chelipeds 

 moderately unequal. Fingers sharp-pointed, not hollowed. Abdo- 

 men of male consists of five movable pieces. 



West coast of America; Indo-Pacific. 

 79856—30 20 



