SUMMAR Y. 1 1 



Invertebrates are animals having no back-bones such as 

 worms, clams, and insects. 



Mammalia is the highest of the several classes of verte- 

 brates and includes man, monkeys, and four-footed 

 beasts. It is characterized by the presence of mammary 

 glands; by the fact that the ventral cavity is separated 

 into chest and abdomen by the diaphragm; and by having 

 more or less of the surface covered with hair. 



Water, animal matters and mineral matters compose the 

 body. If it be burned the animal matters are consumed; 

 the mineral matters remain in the form of ashes. 



