INSECT2VORA. 779 



The caecum is very short. The kidneys are divided into lobules. 

 The mammae are two or four in number, and lie on the abdomen. 

 The young are " precocious." 



Family Otariidae. Eared or fur-seals, connecting the Pinnipeds with 

 the Fissipeds. The hind-feet can be turned forward and used on 

 land in the normal fashion. The palms and soles are naked. 

 There is a small external ear. The testes lie in an external 

 scrotum. 



The sea-lion Otaria, 3 ^ '* 4 ^ *~ 2 , Pacific and S. Temperate seas. 



Family Trichechidae Walruses, intermediate between the Otariidae 

 and the seals. The hind-feet can be turned forwards and used 

 on land. The upper canines form large tusks ; the other teeth 

 are small, single rooted, and apt to fall out ; those generally in 



use are ^2 but the dentition of the foetus is ^^. 

 0130' ^ 3131 



The jaw seems relatively short, an adaptation perhaps to mussel- 

 crushing instead of fish-catching. 

 There are no external ears. 

 The walrus or morse, Trichechtis (Arctic). 



Family Phocidae Seals, the most specialised Pinnipeds. The hind- 

 limbs are stretched out behind, and the strange jumping move- 

 ments on land are effected by the trunk, sometimes helped by 

 the fore-limbs. The palms and soles are hairy. There are well- 

 developed canines; the upper incisors have pointed crowns; 



there are - back teeth. There is no external ear. The testes 

 are abdominal. 



The common seal (Phoca), ^^, the grey seal (ffalichcerus), 



the monk seal (Monackus), the large elephant seal (Macrorhinus 

 leonmus). 



Order INSECTIVORA 



This order includes hedgehog, mole, shrews, and related 

 mammals usually of small size. There is much diversity 

 of type, so that a statement of general characters is very 

 difficult. 



Most Insectivores run about on the earth; the mole 

 (Talpa\ and others like it, are burro wers; Potamogale, 

 Myogale, and others are aquatic ; Tupaia and its relatives 

 live like squirrels among the branches. 



Most feed on insects ; some arboreal forms eat leaves 

 as well; the moles eat worms; Potamogale is said to feed 

 on fish. 



The body is usually covered with soft fur, but the hedge- 

 hog (Erinaceus) is spiny, and so to a less extent is Centetes, 

 the ground-hog of Madagascar. The digits, usually five in 



