EXPLANATION OF PLATES L-VIIL 



Plate L 



Fig. I. Upper canine of Machairodus crenatidens, nat. size : 



a = serration magnified. 

 Figs. 2 & 3. Left upper carnassials of M. crenatidens, nat. size. 



Fig. 4. Left upper carnassials of M. crefiatidens, from the Val 

 d'Arno : nat. size. 

 ,, 5. Upper milk-tusk of Mastodon arvernensis, nat. size. 



Plate II. 



Fig. I. Upper canine oi Alachairodus crenatidens, nat. size. 



,, 2. Outer view of lower milk-tusk of Mastodon arvernensis . 

 nat. size. 



,, 3. Outer view of upper milk-tusk of M. arvernensis, nat. 



size. 

 „ 4. Outer view of upper milk-tusk of M. arvernensis, nat. 



size. 



,, 5. Lower milk-molar 3 of M. arvernensis, from the Crag of 

 Norfolk : nat. size. 



Palte III. 



Fig. I. Last upper milk-molar of Mastodon arvernensis, unworn, 

 nat. size. 



,, 2. Last upper milk-molar of M. arvernensis, worn, nat. size. 

 {d. = talon.) 



,, 3. Lower milk-molar of M. arvernensis, nat. size. 



„ 4. Section of molar of Elephas meridionalis, nat. size, 

 (a = enamel ; b - dentine ; c - cement.) 



Plate IV. 



Fig. I. Tibia of Machairodi/s crenatidens, |- nat. size, {a, a - 

 tooth-marks. ) 



„ 2. Left lower true molar 2 of Mastodon arvernensis, ^ nat. 

 size, {a - ridges ; d = secondary cusps ; c = valleys ; 

 d- lalon.) 



„ 3. Humerus of Mastodon arvernensis (?), gnawed by hyaena : 

 \ nat. size. 



,, 4. Femur of Machairodus crenatidens, gnawed by hyaena : 

 h nat. size. 



