MEGATHEEIID^. 113 



7373. Cast of the right calcaneum of an immature individual. 



7367. Cast of the terminal phalangeal of a third digit. 



7372. Cast of the terminal phalangeal probably of an adjoining 

 digit. 



7365. Cast of a lumbar vertebra. 



7363. Cast of a rib. 



Genus CCCLODON, Lund \ 



According to Eeinhardt " this genus agrees in the structure of the 

 limbs with MegaJonyx^ although having teeth of the type of Mega- 

 therium, which are, however, only |- in number ^ There is an entepi- 

 condylar foramen to the humerus; and the terminal phalangeals 

 are curved and slender. 



Coelodon maquinensis, Lund \ 



This is the type species, and is distinguished from C. escrivanensis, 

 Eeinhardt '% merely by the presence of a groove on the posterior 

 aspect of the last upper molar. The following specimens, as being 

 from Brazil, are provisionally referred to the type species. 



Hah. South America (Brazil). 



18639. Two teeth; from a cavern in Minas Geraes, Brazil. 



Claussen Collection. Purchased, 1845. 



The folloiving were associated with the preceding sjjecimens. 



18638. The terminal phalangeal of the second digit of the manus. 

 This bone agrees with the specimen figured by Eeinhardt, 

 ojj. cit. pi. iv. figs. 8, 9. 



18638 a. Several caudal vertebrse. 

 18638 b. A third metatarsal. 



' Ann Sci. Nat. ser. 2, vol. xi. p. 220 (1839). 



^^ K. Danske Vid. Selsk. Skr. ser. 5, vol. xii. p. 259 (1878). 



^ A mandibular ramus with four teeth has been described and figured by 

 Burmeister in the ' Sitz. k. preuss. Ak. Wiss.' 1885, pp. 567-573, pi. v., under 

 the name of CceIodo7i. Ameghino (' Bol. Ac, JSTac. Cordova,' vol. viii. p. 39-1 

 [1886]) identifies this jaw with his previously described Omcantkus bicr?neistcriy 

 which is more nearly allied to Megatherium than Calodon. See also Liitken, 

 ' Overs. K. Dauske Yid. Selsk. Forhandl.' 1886, pp. 78-84. The name Oracanthus 

 is preoccupied by a genus of fossil fishes. 



^ Loc. cit. * Op. cit. pis. i.-iv. 



PAKT V. I 



