IV. — MAMMALIA. 31 



grinding, as all the Ungulata are vegetable feeders, except Pigs, 

 which are omnivorous. With such a variety of animals in one 

 order it is necessary to classify them into Sub-orders, and for this 

 purpose several methods have been proposed. 



The following is that in use at the British Museum : — 



Sub-Order I.— Proboscidea •• Elephants. 

 II.— Hydracoidea •• Coneys. 



III. — Perissodactyla : Rhinoceroses, Tapirs, Horses, Asses 



IV.— Artiodactyla ; 



Section 1. Suina : Pigs, Hippopotamus. 



2. Tylopoda : Camels and Llamas. 



3. Tragidina : Chevrotains. 



4. Pecora: Oxen, Antelopes, Deer, Sheep, etc. 



The specimens of Ungulata in this Museum are not arranged 

 in accordance with this or any other plan as space does not 

 permit it, but they are mostly large and can easily be found. 



Sub-Order I.— Proboscidea, consists only of the Elephants, 

 of wliich there are two living species — the Indian Elej)hant, 

 and the African Elephant. They have no canine teeth, but their 

 incisor teeth grow to a great length and form the tusks, and their 

 molar teeth are few but large. The trunk, or proboscis, is however 

 the peculiar feature of the Elephant ; it is both nose and hand to 

 its possessor and is an organ of great delicacy of touch. Elephants 

 have broad flat feet with five toes encased in a common hoof. 

 A skeleton is exhibited in the Osteological Hall. The extinct 

 Mammoth and Mastodon belonged to this order. 



Sub-Order II.— Hydracoidea, contains only the Coneys, 

 small animals found in Africa and Arabia. These are sometimes 

 classed with the Rhinoceros in the next order. The only specimen 

 in the Museum is a Hyrax, of which a skeleton is exhibited in the 

 Osteological Hall. 



Sub-Order III.— Perissodactyla. The name of this order 



is derived from the Greek imrissos odd and daktylos a finger, and 



