8 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 

 Superorder MONODELPHIA 



Order EDENTATA. 

 Family BRADYPODIDAB. 



Genus CHOLOEPUS Illiger. 



1811. Choloepus ILLIGER, Prodr. syst. mamm. et avium, p. 108. 

 Type. Bradypus didactylus LINNAEUS. 



Choloepus hoffmanni Peters. 



1858. Choloepus hoffmanni PETERS, Monatsber. k. preuss. 



Akad. Wissensch. Berlin, p. 128. 

 1885. Cholopus hoffmani TRUE, Proc. U. S. nat. mus., vn 



(1884), p. 588. 1885. 

 TYPE LOCALITY. Costa Rica. 



Genus BRADYPUS Linnaeus. 



1758. Bradypus LINNAEUS, Syst. nat., x ed., i, p. 34. Type. 

 Bradypus tridactylus LINNAEUS. 



* Bradypus castaneiceps (Gray). 



1871. Arctopithecus castaneiceps GRAY, Proc. zool. soc. Lon- 

 don, p. 444. 



1882. Bradypus castaneiceps ALSTON, Biol. Centr.-Amer., 

 mammals, p. 184.' 



1885. Bradypus castaneiceps TRUE, Proc. IT. S. nat. mus., 

 vii (1884), p. 588. 1885. 



TYPE LOCALITY. Chontales, Nicaragua. 



*rBradypus infuscatus Wagler. 



1831. Bradypus infuscatus WAGLER, Isis, p. 611. 



