XU CONTENTS. 



SECTION IV. 



DISTRIBUTION OF HYDUOZOA. 



Page 

 I. Relations to Physical Elements. — 2. Bathymetrical Distri- 

 bution.— 3. Geograpki^ml Di«tributioa . . .126 



SECTION V. 



RELATIONS OF IIYDROZOA TO TIME . , • . I30 



CHAPTER III. 



THE CLASS ACTINOZOA. 

 SECTION T. 



MORPHOLOGY AND PHY'SIOLOGY OF ACTINOZOA. 



1. T^'pe of the Class : Actinia. — 2. General Morphology. — 3. 

 Organs of Nutrition. — 4. Prehensile apparatus. — 5. Tegu- 

 mentary Organs. — 6. Corallum or Skeleton. — 7. Muscular 

 System and Organs of Locomodon. — 8. Nervous System 

 and Organs of Sense. — 9, Reproductive Organs 131 



SECTION 11. 



DEVELOPMKNT OF ACTINOZOA , ... I70 



SECTION III. 



CLASSIFICATION OF ACTINOZOA. 



I. Classification. — 2. Order i : Zoantharia.— 3. Order 2: Alcyo- 

 naria.— 4. Order 3 : Rugosa. — 5. Order 4: Ctenophora . i96 



SECTION lY. 



DISTRIBUTION OF ACTINOZOA. 



I. Relations to Physical Elements. — 2. Bathymetrical Distri- 

 bution.— 3. Geographical Distribution . . . 231 



