CONTENTS, 



CHAPTEE I. 



THE SUB-KINGDOM CCELENTERATA. 



Page 

 I. General characters.— 2. Classes • . • .3 



CHAPTER II. 



THE CLASS HYDROZOA. 



SECTION I. 



MORPHOLOGY AKD PHYSIOLOGY OF HYDROZOA. 



I. Typeof the Class: Hydra.— 2. General Morphology. — 3. Or- 

 gans of Nutrition, — 4. Prehensile apparatus. — 5. Tegu- 

 mentary Organs. — 6. Muscular System and Organs of 

 Locomotion. — 7. Nervous System and Organs of Sense. — 

 8. Reproductive Organs . . . . 2C 



SECTION II. 



PEVELOP31ENT OF HYDROZOA . . . . . 5I 



SECTION in. 



CLASSIFICATION OF HYDROZOA. 



I. Classification. — 2. Order i: Hydridae. — 3. Order 2: Cory- 

 nidae. — 4. Order 3 : Sertularidae. — 5. Order 4 : Calycopho- 

 ridae.— 6. Order 5 : Physophoridse. — 7. Order 6 : Medusidse. 

 — 8. Order 7 : Lucernaridae . . . . '79 



