177 



these bones are long, narrow, and terminate anteriorly in a deep 

 notch. There is no depression on the frontals at the root of the 

 nasals. 



Hah. France. 



M. 1399. The cranium of a male, wanting only a portion of the 

 (Fig.) right zygomatic arch, part of the posterior border of the 

 left orbit, the right outer incisor and canine, and the left 

 inner incisor and the first premolar; from the Upper 

 Eocene of Caylux (Tarn-et-Garonne), France. This speci- 

 men, which is figured in the accompanying woodcut (fig. 22), 

 is the type of the species, and is described and figured by 

 the present writer in the Geol. Mag. loc. cit. In the 

 following table the dimensions of this and the next speci- 

 men are compared with those of a typical skull of 0. 

 laticurvatum. 



C.filholi. 



M. 1399. M. 1400. 

 Cranium: 



Extreme length superiorly 0-081 0-073 0-0815 



interiorly 0-067 0-064 0-070 



Length of series of cheek-teeth . . 0-032 0-031 0-037 

 true molars . . 0-0144 0-0143 0-0175 



Width of palate at m. 3 . . 0-014 0-015 



Length of nasals 0-019 0-0175 0-024 



Greatest width of do. 0-008 0-0075 0-006 



Height of occiput 0-015 0-016 



Extreme height of cranium 0-033 0-033 



Vertical diameter of orbit 0-014 0-013 0-015 



Length of diastema 0-0037 0-003 



Mandible: 



Extreme length 0-056 0-067 



height 0-037 0-043 



Length of dental series 0-039 0-042 



last six teeth 0-030 0-034 



Height at pm. 2 0-007 0-005 



m. 3 0-013 0-017 



Length of diastema 0-0026 



Purchased, 1884. 



M. 1400. The cranium and mandible of a smaller, and probably 

 (Fig.) female, individual; from the Upper Eocene of Caylux. 

 This specimen, which is figured in the accompanying wood- 

 PABT n. N 



