78 
osteological gallery. 
ing such slippery prey as the fishes on which Seals feed; but the 
teeth are useless for biting the prey into small pieces, each fish 
being invariably swallowed whole. Some of the Seals have their 
teeth provided with additional sharp-pointed cusps along their 
edges, as in the Sea-Leopard (Stenorhijnehus Icptonyx) (fig. 3G). 
This description applies fully only to the true Seals or Phocidoe, 
the Otariidee, or Eared Seals, resembling ordinary Carnivores far 
more, especially in the position of their hind limbs, as already 
explained on p. 21. 
The Walrus is in many ways intermediate between these two 
families, but its dentition is very remarkable, the canine teeth 
being enormously developed, while all the other teeth are small and 
rudimentary and with flattened crowns. A skeleton of this animal 
is exhibited in the recess between Cases 7 and 8, and several skulls 
and tusks are in Case 7, Division D. 
Order III. INSECTIVORA. 
[Case 8.] The Tnsectivora (Case 8 a) are a group of animals not easily 
defined by common osteological characters, and containing many 
forms in which parts of the skeleton are remarkably modified. 
Tlieir teeth are strong and well developed, and, in the majority, 
clearly separable into the usual divisions ; but in some, such as the 
Fig. 37. 
Dentition of (A) Tanrec {Centetes veartdatus) and (D) Hedgehog 
( Erinaceus e uropmiii ) . 
c, canines ; i, incisors ; m, molars ; pm, premolars. 
