ANCODON PAEVUS. — EHAGATHEEIUM. 191 



i 



M. 8508. Upper part of a left ulna similar to that of A. gomngel. The dimensions (in centimetres) 

 are : — 



Antero-posterior width of the olecranon process 4 app. 



Length of sigmoid notch 3"5 



Width of surface for radius . • 2 



Presented hy W. E. de Winton, Esq., 1903. 



M. 8508a. Upper end of similar right ulna. Presented hy W. E. de Winton, Esq., 1903. 



M.8508h. Upper half of an abraded right ulna of rather smaller size. 



Presented hy 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 hy 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 6*2 cm. 



Presented hy 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. velaunus) 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 (m. 2, m. 3). The outer side of m. 2 is partly broken 

 away. The dimensions (in centimetres) of these teeth are : — 



Length. Width. 



m.2. . . 1'6 1-6 app. 



m. 3 1'9 2 



M. 9242. Plaster cast of the above specimen. Made in the British Museum. 



Genus RHAGATHERIUM, Pictet. 



[Memoire sur les Animaux Vert^bres trouv^s 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 



