URSID®. 157 
Fig. 23. 

Hyenaretos, sp. Second right lower true molar ; from the 
Pliocene (?) of China, }. 
1 
that country) is of considerable interest. The specimen 
has been previously noticed by the present writer in the 
Geol. Mag. dec. 3, vol. 1, p. 444 (1884). 
Presented by D. Hanbury, Esq. 1853. 
Genus ARCTOTHERIUM, Bravard'. 
Syn. Arctoidotherium, Bravard, MS. 
ie 3 
Dentition :—I. C. > Pm. 75 M. = 
Arctotherium bonariense (P. Gervais’). 
Syn. (2) Ursus braziliensis, Lund *. 
Ursus bonariensis, P. Gervais +. 
. Arctothertum latidens, Bravard ’. 
Hab. 8S. America. 
32915-6. The cranium and mandible, from the Pleistocene of the 
(Fig.) banks of the river Plata, Buenos Ayres. The cranium, of 
which the palate is represented in the accompanying 
woodcut (fig. 24), is imperfect posteriorly, and the man- 
dible has lost the hinder part of the right ramus. The 
teeth are in a well-worn condition. 
From the suppression of pm. 1, the double roots of pm. 3, 
the squareness of m. 1, and the smaller extent of the back- 
ward prolongation of the talon of m. 2, it is pretty certain 
: that the South-American fossil is generically distinct from 
Ursus, and there is as little doubt that it is equally distinct 
from Hycnarctos. It forms, in fact, a genus almost pre- 


1 Catalogue des Espéces d’Animaux Fossiles recueilles dans l’Amérique de 
Sud (Parana, 1860), zeste P. Gervais. 
2 Zool. et Pal. Frangaises, lst ed. vol. i. p. 189 (1848-52), Ursus. 
8 Ann. Sci. Nat. (Zool.), ser. 2, vol. xi. p. 224 (1839). 
really belongs to the same species, has the priority. 
4 Loc. cit. 5 Loe. cit. 
This name, if it 
