CLASS I, MAMMALIA. 



Remarks. This class is not entirely depen- 

 dant on instinct ; for every animal of this class 

 possesses faculties which enable it to accommo- 

 date its views to necessitous or restricted circum- 

 stances. Their lungs are divided into two lobes ; 

 and their trunks are divided transversely by a 

 diaphragm. The part above the diaphragm con- 

 tains the heart and lungs ; the part below contains 

 the stomach and all that part of the alimentary 

 canal, which is below the upper opening into the 

 stomach. 



The animals of this class have the most com- 

 plicated structure and the most delicate sensa- 

 tions ; consequently are subject to the greatest 

 variety of disease. Their desires are multifari- 

 ous ; and while seeking th^ir gratification, they 

 bring into operation and greatly perfect all their 

 various functions. Their brains are larger than 

 those of other classes which have brains ; and a 

 slight derangement of the brain destroys life. 



THE CLASS MAMMALIA is DIVIDED INTO 



EIGHT ORDERS. 



ORDER i. BIMANI. 



Having two hands and cuspidate teeth. Feed- 

 ing on animal and vegetable substances. 



HOMO, (man) body erect, and sustained upon 

 two feet j face nearly vertical, or forming an an- 

 gle of more than seventy degrees with the basis of 

 the cranium. 



*5 



