664 CLASS XVII. 



Sp. Clilamydophorus truncatus Harl. Ann. of the Lye. of New Yorh, i. p. 

 235, Tab. ai, copied in the Ann. des Sc. nat. v. 1825, pp. 5 — 17, PL i, 

 GUER. Iconogr., Mamm. PI. 34, fig. 3 ; an animal of the size of the com- 

 mon mole, found in Chili, and which mostly keeps under ground. See the 

 skeleton described by Yarrell Zool. Journ. ill. No. 12, 1828, p. 544, Tab. 

 16, 17, Oken's Isis, 1830, p. 926, Tab. IX. and especially a monograph by 

 Hyrtl Chlaiiiydophmd truncati cum Dasypode yymnuro comparati Eocamen 

 anatom., in Denksdtr. der Kais. Acad. d. Wissensch. ix. Wien, 1855, 

 s. I — 66, with figures. 



Family XXI. Tardigrada Illig. Head truncated anteriorly, 

 flat. Legs, especially the anterior, very long. Claws incurved, 

 compressed. 



The sloths live in South America, principally in the large forests ; 

 they feed on the leaves of trees; the females bear only a single 

 young one, and carry it, as long as it continues to suck, on their 

 hack '. 



Compare CuviER sur VOsteologie des Paresseux, Ann. du Mus. v. pp. 

 189 — 215, PL 14 — 17; A. Brants Dissert, zool. inaug. de Tardigradis, 

 cum II. Tab. L. B. 1828, 4to. 



Bradypus L. Body liairy. Molar teeth separate, cylindric. 

 Ears very short, concealed under hair. Fore feet tridactylous or 

 didactylous, hind feet tridactylous, with toes conjoined as far as 

 the claws. Tw^o pectoral mammae. Tail very short, or none. 



Bradypus Illig., Acheus F. Cuv. Molars - — - (or in younger 



5 5\ * ■* \ 



individuals - — -\ with the first small. Fore feet tridactylous, 



t) 0/ 



longer than hind feet. Tail very short. 



Sp. Bradypus cucidliger Wagl., Bradypus gularis Eueppell Mus. Senclc. 

 III. s. 138, 139, Taf. XI., Cdv. R. Ani., ed. ill., Mamm. PL 70; Ai a dos 

 hride Daubenton in Buff. xm. PL 32; Surinam, Guiana; — Bradypus 

 pallidus Wagn., Bradypus tridactylus Maxim. Ahb. zar Naturgescli. Brasil. 

 2te Lief. (The name of Brad, tridactylus L. is merely given arbitrarily 

 to one of these two species, since it rests upon the opinion that there is 

 only one species with 3 toes on the fore feet.) — Bradypus torquatus Illig., 

 Maxim. Abb. zur Naturgesch. Bras. 6te Lief., Guer. Iconogr., Mammif. 

 PL 23, fig. r ; both species from the North and East of Brasil ; the last 

 also, though rare, in Peru; — Bradypus infuscatus Wagl. North western 



^ Interesting particulars on the mode of life and properties of the sloths have 

 been given by Humboldt and Tschudi. See Tschudi Fauna Peruana, I. jjp. 

 202 — 205. 



