132 U. S. NATIONAL MUSEUM BULLETIN 205 



Cyclopes didactylus dorsalis (Gray)* 



1865. Cyclothurus dorsalis Gray, Proc. Zool. Soc. London, 1865, pt. 2, p. 385, 



pi. 19, October 1865. 

 1884. Cycloturas didactylus True, Proc. U. S. Nat. Mus., vol. 7, (App., Circ. 



29) , p. 587, Nov. 29, 1884. (Part.) 

 1900. C[yclopes] d[idactylus] dorsalis Thomas, Ann. Mag. Nat. Hist., ser. 7, 



vol. 6, p. 302, September 1900. 

 Type Locality. — Costa Rica (Restricted to Orosi near Cartago, Cartago, Costa 

 Rica, by Goodwin, Bull. Amer. Mus. Nat. Hist., vol. 87, p. 354, Dec. 31, 1946) . 

 Range. — From Honduras (Goodwin, Bull. Amer. Mus. Nat. Hist., vol. 79, p. 149, 

 May 29, 1942) south through Nicaragua (J. A. Allen, Bull. Amer. Mus. Nat. Hist., 

 vol. 24, p. 648, Oct. 13, 1908), Costa Rica (Goodwin, Bull. Amer. Mus. Nat. 

 Hist, vol. 87, p. 354, Dec. 31, 1946) and Panama to Canal Zone (Goldman, 

 Smithsonian Misc. Coll., vol. 69, No. 5, pp. 61-62, Apr. 26, 1920) . 



Cyclopes didactylus mexicanus Hollisterf* 



1914. Cyclopes mexicanus Hollister, Proc. Biol. Soc. Washington, vol. 27, p. 



210, Oct. 31, 1914. 

 1952. Cyclopes didactylus mexicanus Hall and Kelson, Univ. Kansas Publ. 



Mus. Nat. Hist., vol. 5, No. 24, p. 316, Nov. 21, 1952. 

 Type Locality. — Tehuantepec, Oaxaca, Mexico. Range. — Oaxaca, southern 

 Veracruz, and Tabasco to Chiapas, Mexico. 



Superfamily BRADYPODOIDEA 

 Fam ily Bradypodidae (sloths) 



Genus BRADYPUS Linnaeus (three-toed sloths) 

 1758. Bradypus Linnaeus, Systema naturae, ed. 10, vol. 1, p. 34. (Type, 

 Bradypus tridactylus Linnaeus.) 



Bradypus griseus griseus (Gray)* 



1871. Arctopithecus griseus Gray, Ann. Mag. Nat. Hist., ser. 4, vol. 7, p. 302, 



April 1871. 

 1884. Bradypus infuscatus True, Proc. U. S. Nat. Mus., vol. 7 (App., Circ. 29) , 



p. 588, Nov. 29, 1884. (Not of Wagler, 1831.) 

 1891. Bradypus griseus J. A. Allen, Bull. Amer. Mus. Nat. Hist., vol. 3, p. 216, 



Apr. 17, 1891. 

 Type Locality. — Cordillera de Chucu, Veraguas, Panama (see Alston, Mam- 

 malia, pp. 183-184, December 1880, in Godman and Salvin, Biologia Centrali- 

 Americana; . . .). Range. — From Canal Zone in Panama (Goldman, Smith- 

 sonian Misc. Coll., vol. 69, No. 5, p. 57, April 26, 1920) northwest to Juan Vinas 

 and San Carlos in Costa Rica (Goodwin, Bull. Amer. Mus. Nat. Hist., vol. 87, 

 p. 352, Dec. 31, 1946) . 

 Bradypus griseus castaneiceps (Gray)* 



1871. Arctopithecus castaneiceps Gray, Proc. Zool. Soc. London, 1871, pt. 2, 

 p. 444, August 1871. 



