CONTENTS xiii 



PEESH-WATBR POLYP 



Morphology — size, shape, color, structure; Physiology — movements, nutri- 

 tion, nervous properties ; Microscopic structure 80-89 



CAMPANULAEIAN HYDEOID 



Morphology — general form and structure, perisarc, ccenosarc, zooids ; Phys- 

 iology — movements, feeding, sensation ; General questions 90-96 



STAEPISH 



Morphology — External anatomy — shape, size, color, structure; the skele- 

 ton; Internal anatomy — the digestive system, the reproductive system, 

 the water-vascular system, the circulatory system, the respiratory system, 

 the nervous system ; Physiology — movements, nutrition, nervous proper- 

 ties, reproduction, regeneration of lost portions of the body, sexual re- 

 production, the structure of the sexual cells, preparation of the ovum for 

 fertilization, fertilization, the consequences of fertilization 9'7-121 



EAETHWOEM 



Morphology — External characters — general shape, color, general structure, 

 apertures ; Internal anatomy — the digestive system, the circulatory system, 

 the nervous system, the excretory system, the reproductive system ; Physi- 

 ology — movements, feeding, circulation; General questions. . .122-137 



LOBSTER OB CEATFISH 



Morphology — External characters — the entire animal, the body proper, the 

 abdomen, the cephalothorax, the telson, the appendages, the gill-cham- 

 ber, the exoskeleton, the organs of special sense ; Internal anatomy — the 

 epidermis, the muscular system, the circulatory system, the digestive sys- 

 tem, the excretory system, the reproductive system, the nervous system ; 

 Physiology — movements, feeding, breathing, nervous properties; Gen- 

 eral questions 138-171 



LOCUST 



Morphology — the body as a whole, the head, the mouth-parts, the thorax, 

 the abdomen ; Internal anatomy — the muscles, the viscera, the nervous 

 system; Physiology; General questions 172-188 



