122 TEETIAEY VERTBBEATA OP THE PAYCM. 



mastodon. The teeth are for the most part represented by their bases only. Middle 

 Eocene. The dimensions (in centimetres) of this specimen are : — 

 Greatest length from end of coudyles to tip of snout ... 37 

 Length from hinder border of palate to tip of snout ... 23 



„ summit of occiput to tip of snout 34-7 



Greatest width of occipital surface 15'5 



Height of occipital surface above foramen magnum .... 7'5 



Width of skull-roof at temporal fossae 6'5app. 



Length of molar and premolar series 15"2 



„ premolar series 6'7 



„ molar series 8'5 



Presented by Baron Franz Nopcsa, 1905. 



C. 10002. Portions of large skull. Described and figured in Geol. Mag. [4] vol. viii. (1901) p. 404, 

 figs. 2 A, 2 B; also PL X. figs. 3,4. Middle Eocene. The dimensions (in centimetres) 

 of this specimen are : — 



Greatest width at zygomatic processes 27 



„ of occipital surface 19'4 



Height of occipital surface above foramen magnum .... 7'7 



Width between orbits 6-5 



Length of broken tusk (i. 2) 4-6 + 



Width of broken tusk (i. 2), side to side 2-8 



„ „ before backwards 2-8 



Length of premolar series 6-8 app. 



M. 8192. Plaster casts of the above specimen. Made in the British Museum. 



M. 8905. "Portion of skull, including the right maxilla. Middle Eocene. 



Presented hy the Egyptian Government, 1904. 



M. 8904. Anterior portion of skull, showing the sockets of the incisors. Middle Eocene. 



Presented hy the Egyptian Government, 1904. 



M. 8906. Imperfect skull, teeth not preserved. The length from the summit of the occiput to the 

 tip of the snout is 32 cm., that from the hinder border of the palate to the same point 

 about 21*5 cm. Middle Eocene. Presented hy the Egyptian Government, 1904. 



Iff. 8884. Palatal region of skull with molars and premolars. Upper Eocene. The dimensions (in 

 centimetres) are : — 



Length of premolar series 7 



Width of palate opposite m.l 3-6 



Length. Width. 

 pm. 2 , 2-5 2 



pm. 3 2-5 2-8 



pm.A 2-2 2-7 



m.l , 2-9 2-5 



m. 2 3-3 2-8 



Presented hy the Egyptian Government, lii04. 

 C, 8847. Portion of the palatal region of the skull with pm. 3, pm. i, m: 1, and m. 2 well preserved 

 on the right side. The base of the zygomatic process of the maxilla is over the premolars. 

 Upper Eocene. The dimensions (in centimetres) are : — 



