Proboscidea — Molar teeth of Mastodons. 



17 



quite filled with, cement. Fig. 23 shows, in section, a molar Molar Teeth 



tooth, of Mastodon ongi'stidensin which the cement is quite absent of Mastodon. 



and the valleys are empty. Z ab ^ e " case ' 



r - No. 23. 



Fig. 21.— Left lower milk-molar of Mastodon angmtidens, var. palceindicus (Lydekker). 

 Lower Siwaliks, India. 



Fig. 22. — Lfft upper milk-molars (nat. size) of Mastodon longirostris (Kaup), from the 

 Upper jliocene, Eppelsheim, Hessen-Darmstadt (after Gaudry). 



Fig. 23. — Vertical longitudinal section of the first lower true molar of Mastodon anpus- 

 Cuvier;, from the Middle Miocene of Simorre, France; d, enamel; c, dentine. 

 (| nat. size;. 



The series of Proboscidean remains commences with those North, side, 

 of the TJinotherium, a hoofed quadruped, nearly related to the No a 3 c£ as ' 

 Mastodon and Elephant, the most perfect remains of which 

 have been found in the Miocene Tertiary formation of Eppels- 

 (1876) c 



