8G 
OSTEOLOGICAL GALLERV. 
[Case 8.] tlie I’aca [Cadogenys yacd)^ whose zygomatic arches are much en- 
larged and swollen, and protect a pouch opening into the mouth. 
The second Suborder {Dujjlkidentata) (Div. F) consists of the 
Hares and Rabbits [Lepus) and the Pikas (Lagomys). Their chief 
peculiarity is that some bones of their skulls are singularly im- 
perfect, consisting in parts merely of a sort of bony network, 
Fig. 4o, 
Skull of Common Hare (Lepus eiiropreus). 
i, incisors ; m, molars ; premolars. 
especially in the neighbourhood of the olfactory chamber. They 
])Ossess postorbital processes, very large palatal foramina, and 
united shin-bones. 
Order VII. UNGULATA. 
Suborder Pkoboscidea. 
Numerous teeth and skulls of both species of Elephant, and of 
[Case 0.] different ages, are jilaced in Case 9; several other skulls and six 
skeletons (of an African male, Sumatran female, a gigantic Indian 
tuskless male, two tuskers, and one lemale) are exhibited in the 
adjoining Saloon. 
The Ele})hants (Case 9) are characterized by the strength and 
solidity of all their bones, and by their incisor teeth being deve- 
lo])cd into long and formidable tusks. 
Their skull (fig. 46) presents many special features : it is pro- 
])orlioiiatcly very large and high, and the occipital surface looks 
obliquely upwards, instead of backwards as in other Mammals. 
