ANCODON PAllVUS— RlIAGATJIEllIUM. 
191 
M. 8508. Upper part of a loft ulna similar to that of A. (jorrhujei. Tlio dimensions (in centimetres) 
are : — 
Antero-posterior width of the olecranon process 4 app. 
Length of sigmoid notcli 3'5 
Width of surface for radius 2 
Presented by W. K. de Winton, Esq., 1903. 
M. 8508 a. Upper end of similar right ulna. Presented by W. E. de Winton, Esq., 1903. 
M. 8508b. LTpper half of an abraded right ulna of rather smaller size. 
Presented by W. E. de Winton, Esq., 1903. 
C. 8641. Proximal end of right ulna. 
M. 8516 a. Distal end of right tibia. Width of articulation 3'8 cm. 
Presented by W. E. de Winton, Esq., 1903. 
M. 8431. Right astragalus. Width of proximal articulation 2’6 cm. ; greatest length 6*2 cm. 
M. 8507. Left astragalus. Width of proximal articulation 2'7 cm. ; greatest length G‘2 cm. 
Presented by W. E. de Winton, Esq., 1903. 
C. 8636. Somewhat smaller left astragalus. Greatest length about 5‘4 cm. 
Ancodon sp. 
Two associated right upper molars (m. 2, m. 3) of about the same size as those of 
A. gorrinyei, but differing from them in possessing higher, sharper, and more selenodont 
cusps, were collected by Mr. Beadnell. This specimen indicates the probable existence 
of another species of Anthracotheroid which approaches more nearly to the later typical 
species of Ancodon (e. g., A. velatinus) than does A. gorringei. At the same time the 
evidence does not seem sufficient to warrant the establishment of a new species. 
Form. & Log. — Fluvio-marine beds (Upper Eocene): north of Birket-el-Qurun. 
C. 10500. Two associated right upper molars (to. 2, m. 3). The outer side of m. 2 is partly broken 
away. The dimensions (in centimetres) of these teeth are : — 
Length. Width. 
TO. 2 1'6 l‘6app. 
TO. 3 1-9 2 
M. 9242. Plaster cast of the above specimen. Made in the British Museum. 
Genus RHAGATHERIUM, Pictet. 
[Memoire sur les Animaux Vertebres trouves dans le Terrain Siderolithique du Canton de Vaud, 
p. 43 (1855).] 
This genus was founded by Pictet {loc. cit.) for the reception of a small species of 
Anthracotheroid in which the incisors are small, while the canines have cutting-edges 
