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figures one found in the forest of Bondy, in which there are twenty- 
two. A second distinctive character, according to M. Cuvier, is, that 
the lines of enamel are thinner, and less scalloped or crenulated, in 
the fossil, than in the others, he having only noticed one exception. 
A third character is, he thinks, yielded by the much greater absolute, 
as well as proportional, width of the fossil, this being in the pro- 
portion of eight to six. 
The specimens which I possess do not, except as to the greater 
degree of thickness of the teeth, exactly accord with these observations 
of M. Cuvier. This is, I believe, in consequence of my happening to 
possess some fossil teeth, of different species from those in the pos- 
session of that gentleman, or from those which I have seen described. 
As to the greater thinness of the plates in the fossil than in the 
recent species, this is, I think, undoubtedly the case, not only with 
the common fossil teeth, as appears in three or four detached teeth 
from Essex, and in one which is still retained in its alveolous, in a 
jaw nearly perfect ; but it is also the case with the undulating plates 
o f two other teeth, of which I shall soon have occasion more fully to 
speak. In the one which is still retained in the jaw, seventeen plates 
are seen in ten inches extent of surface, all of which were in use at 
the death of the animal : and, in the two last-mentioned, lamellae 
equal to twenty plates exist in a length of triturating surface of six 
inches and a half. One of these is represented Plate XX. Fig. 8. In 
a fragment of an upper tooth from Germany, in the length of five 
inches, are contained only eight lamellae. 
But the specimen which offers the strongest exception to the 
greater degree of thinness of the plates existing in the fossil teeth 
being admitted as a general rule, is represented Plate XX. Fig. 6, 
being a tooth of the left side of the upper jaw, which I purchased 
from Mr. George Humphries, in the sale of the Calonnian Museum, 
and which is described as having been found in Staffordshire. 
This curious fossil differs materially, not only from the teeth of the 
