16 



SUBKINGDOM VBETEBKATA. 



CLASS I. MAMMALIA. 



General Characteristics. — To the class of Mammdls 

 belong man and those animals which resemble him in the 

 most important parts of their organization. The distinguish- 

 ing features are that they suckle their young, and that their 

 bodies have, in general, a full or partial covering of hair. 

 Some being designed for a life purely terrestrial, others 

 mainly aerial or aquatic, they exhibit great variety of struc- 

 ture, as will appear in the following tabulation for Orders: 



CI ASS. ORDERS EXAMPLES. 



f WITH c Erect, TWO-HANDED Bimaoa Man. 



HANDS. X Non-erect, fodr-hakded Quadrumana Monkey. 



TEETH COMPLETE Carnlvora Cat, etc 



FOUR FEET HOOPED Ungulata Horse, etc 



FEET PARTLY HOOFED Hyracoidea Daman. 



PROBOSCIS Proboscidea Elephant. 



WHALE-LIKE, HERBIVOROUS Sirenia. Manatee, etc 



FISH-LIKE, CARNIVOROUS Cetacea WlidU, etc. 



HAND-WINOED Cheiroptera Bat. 



CONICAL TEETH Insectivora Mole, etc 



GNAWING TEETH Rodentia Rat, etc. 



TOOTHLESS Edentata Stott, etc. 



POUCHED Marsupialia Opossum, etc 



BIRD-LIKE Monotiemata ZhtcktnU. 



MAMMALIA. 



ORDER BIMANA. 



This order comprises only one family, and embraces a 

 single genus and species ; thus, 



order. 



BIMANA. 



FAMILY. 



HOMINID^.* 



GENUS. 



Homo 



sapiens, 



EXAMPLE. 



Man. 



General Characteristics. — Marked physical peculiar- 

 ities distinguish man from the other mammals. Thus, the 

 position of the spinal opening in the middle third of the base 

 of the skull, thereby balancing the head and admitting an ' 

 upright posture ; the double curve of the vertebral column ; 

 the length of the thumb, extending to the middle of the 

 index finger, and the ability of opposing the thumb to the 



* By general coDsent of zoologiets, the names of all Families terminate in idtB, 



