88 
OSTEOLOGICAL GALLERY. 
The crowns of these grinding-teeth are made up of a variable 
number of lamime or thin ])lates, each composed of an outer layer 
of enamel and a core of dentine, the laminee being themselves 
bound together side to side by a substance known as cement. In 
the African Elephant each lamina, when seen in section, is lozenge- 
shaped, so that the grinding-surface of the tooth when worn has the 
appearance shown in fig. 47. In the Indian species, however, the 
laminae have flattened parallel sides, and thus the tooth-surface pre- 
sents numerous transverse parallel bands of enamel, as in fig. 48. 
Fi". 47. Fig. 48. 
Molars of African and Indian Elephants. 
Various modifications of these patterns have been found in the 
teeth of extinct Elephants, and a large number of species have been 
distinguished accordingly. 
Suborder IIyracoidea. 
[Case 10.] The Coneys (Case 10, Div. A) are of small size, which alone is 
sutficient to distinguish them from their huge allies; but they 
are also characterized by their peculiar dentition. The molars much 
resemble those of the Rhinoceros, whilst the incisors are quite unique 
in structure and shape, the upper ones being rootless like those of 
