MOXOTREMATA OR DUCKBILLS. '135 



The Duckbill (Platypus) is another form of mono- 

 trerae, which is covered with brown fur, and has a long 

 flat muzzle very similar in its appearance to that of a duck, 



FIG. 154. 



Duckbill, Platypus paradoxus. 



and which has webbed feet and a flat tail. This animal 

 lives in ponds and quiet streams, and digs burrows in the 

 banks. It represents the family of Ormthorhynchidae. 



PRINCIPAL TOPICS CONSIDERED IN CHAPTER II., SECTION II. 



SUB-SECTION I. 



The Mammalia defined. Their form and size. Their digestive system. 



Absorbent system. Circulatory system. Respiratory system. Skeleton in 



general. Skull. Teeth. Dental formula. Muscular system. Repro- 

 ductive system. Nervous system. Special senses. Classification of the Mam- 

 malia. 



SUB-SECTION II. 



Man an order by himself. Erect attitude. Forward pair of limbs liberated 



from the function of mere locomotion. Hand. Brain. Face. Speech. 



Mental and spiritual endowments. 



SUB-SECTION III. 



Qnadrnmana defined. Their attitude not erect. Hand inferior to that of 



Man. Qnadrnmana inhabit warm regions. Catarrhine monkeys. Platyrhice 



monkeys. Strepsorhine quadrumana or Lemuroidea. 



SUB-SECTION IV. 



Carnivora defined. Cats. Hyenas. Civets. Bogs, etc. Fishers, 



Martens, Sables, Weasels, Minks, Gluttons, Skunks, Badgers, Otters, etc. 

 Bears, Raccoons, etc. Seals, and the Walrus. 



