OF TILGATE FOREST. 
2()9 
and a most interesting series has subsequently been 
collected, displaying every gradation of form, from 
the perfect tooth in the young animal, to tlie last 
stage, that of a mere bony stump, worn away by 
mastication. These teeth are comparatively rare ; 
and tlie only locality in which they have hitherto 
been noticed, is in the immediate vicinity of Til- 
gate Forest : they have not been discovered in any 
other part of England. Their external form is so 
remarkable, and bears so striking a resemblance to 
the grinders of the herbivorous mammalia, that 
wlien a large partially worn tooth first came under 
my notice, its analogy to the incisors of the rhino- 
ceros led me to suspect whether the deposit in 
which it was found might not be of diluvial origin. 
Subsequent discoveries proved that these teeth 
belonged to an unknown herbivorous reptile ; but 
their structure was so extraordinary, that I deter- 
mined to obtain the opinion of Baron Cuvier 
upon the subject: specimens were accordingly 
transmitted to Mr. Lyell, who was then residing 
in Paris, and by whom they were })resented to 
M. Cuvier, who favoured me with the followinsr 
remarks : — “ Ces dents me sont certainement in- 
connues ; elles ne sont point d’un animal camas- 
sier, et cependant je crois qu’elles appartiennent, 
vu leur pen de complication, leur dentelure sur 
les bords, et la couche mince d’email qui les revet, 
a I’ordre des reptiles ; a I’apparence exterieure on 
pourrait aussi les })rendre pour des dents de pois- 
sons analogues aux tetrodons, ou aux diodons ; 
mai.s leur structure interieure est fort differente de 
cedes Id. N’aurions-nous pas ici un animal nouveau, 
