such a complete transition between the two types in respect of the 

 former character, that the writer follows Flower (Cat. Vert. Anim. 

 Mus. E. Coll. Surg. part ii., Mammalia, p. 390 [1884] ) in classing 

 all the species in the type genus. There is a large third lobe to niTa, 

 but none to mm. 4. The first upper premolar appears normally to 

 have no predecessor ; but there is evidence (infra, p. 39) that it is 

 occasionally a true dent de remplacement. 



The genus has not been recorded from North America ; it has been 

 stated by Bravard to occur in the Pleistocene of Buenos Ayres, but 

 his specimens have been referred by Burmeister : to Macrauchenia. 



Group A. The third lower premolar as complex as the fourth, and 

 the hinder lobe of the fourth upper premolar complete ; four 

 premolars in both jaws. 



Palaeotherium magnum, Cuvier 2 . 



This is the type species, and is larger than any of the others. 

 Hob. Europe. 



29625. Cast of the right maxilla, showing the canine and the entire 

 cheek- dentition. The original is from the Upper Eocene 

 of Montmartre, near Paris, and is preserved in the Paris 

 Museum of Natural History ; it is figured in De Blainville's 

 ' Osteographie,' Genus Palceotlierium, pi. v. 



Presented by the Paris Museum of Natural History. 



29432. Fragment of the right maxilla, containing m. 2 and a portion 

 of m. 1 ; from Montmartre. 



Hastings Collection. Purchased, 1855. 



29446. Fragment of the left maxilla, with portions of two molars ; 

 from Montmartre. 



Hastings Collection. Purchased, 1855. 



28234. The right upper cheek-dentition, wanting pm. 1 ; from the 

 Upper Eocene of Debruge, near Apt (Vaucluse), France. 

 Bravard Collection. Purchased, 1852. 



28234 a. Fragment of the right maxilla, with m- 3 ; from Debruge. 

 Bravard Collection. Purchased, 1852. 



1 An. Mus. Buenos Ayres, vol. iii. art. 4, p. 133 (1885). 

 3 Ann. d. Museum, vol. iii. p. 367 (1804). 



