16 



SUBKINGDOM VERTEBRATA. 



I. MAMMALIA. 



Characteristics. To the class of Mammals 

 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: 



MAMMALIA.^ 



ORDERS 



f WITH c ERECT, TWO-HANDED Bimana 



HANDS. < NON-ERECT, FOUR-HANDED Quadrumana. 



TEETH COMPLETE Carnivora. . . . 



FOUR FEET HOOFED Ungulata.... 



FEET PARTLY HOOFED Hyracoidea . . 



PROBOSCIS Proboscidea. . 



WHALE-LIKE, HERBIVOROUS Sirenia 



FISH-LIKE, CARNIVOROUS Cetacea 



HAND-WINGED Cheiroptera . 



CONICAL TEETH Insectivora . . 



GNAWING TEETH Rodentia 



TOOTHLESS Edentata 



POUCHED . Marsupialia. . . 



BIRD-LIKE ... ... Mouotremata. . 



EXAMPLES. 



Ma,,. 



Monkey. 



Cat, etc. 



Horse, etc. 



Daman. 



Elephant. 



M'tnatte, etc. 



Whale i etc. 



But 



Mole, etc. 



Rat, etc. 



Stnth, etc. 



Opossum, etc. 



...Duckbill. 



ORDER BIMANA. 



This order comprises only one family, and embraces a 

 single genus and species ; thus, 



BIMANA. HOMINIM!.* HOMO sapiens, 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 consent of zoologists, the names of all Families terminate in Ida'. 



