CONTENTS. 



INTRODUCTORY LECTURE. ^""^^ 



CUABACTEBS AND CLASSIFICATION OF AnIMALS - - - 1 



LECTURE II. 



POLTGASTBIA - - - - - - - -16 



LECTURE IIL 

 Rotifeba - - - - - - - -39 



LECTURE IV. 

 Entozoa -.---. . -57 



LECTURE V. 

 Entozoa - - - - - - - -80 



LECTURE VL 

 Polypi - - - -----93 



LECTURE VII. 

 Polypi, IIydbozoa and Anthozoa - - - - - 119 



LECTURE VIII. 

 Bbyozoa .---.... 144 



LECTURE IX. 



ACALEPH^JE -..--_._ 157 



LECTURE X. 



ECIIINODEBMATA - - - - - - -190 



LECTURE XL 

 Annulata -..-...- 225 



