CONTENTS 



Chapter I 

 SEA FARMING 



PAGE 



A national inventory of resources — Waste by earlier genera- 

 tions — Extinction of undomesticated food organisms in- 

 evitable — Achievements in the domestication of terrestrial 

 animals and plants — Sea farming — What has been ac- 

 complished — What may be hoped for I 



Chapter II 



NOTES ON THE ANATOMY OF THE FOOD 

 MOLLUSKS 



The shell — Its parts — Pearls — Attachment of the oyster — The 

 mantle — The digestive tract — The palps or lips — Mouth, 

 stomach, and intestine — The vascular system — The heart 

 — The excretory organs — Sexual organs — Hermaphrodit- 

 ism — The nervous system — The foot — Creeping, digging, 

 and spinning the byssus — Swimming by means of the foot 

 — Structure of the gills of Mytilus, Pecten, and Ostrea . II 



Chapter III 



DEVELOPMENT 



Structure of the male and female cells — Preparation of the 

 ovum for fertilization — Fertilization — Segmentation — 

 Formation of organs — Attachment 39 



Chapter IV 



CILIARY MECHANISMS 



The food of bivalves — The normal process of feeding — The 

 gills as food collectors — Transfer of food to the mouth 

 by gills and palps — The mud problem and its solution 

 — Cilia tracts on the mantle of Venus leading backward 

 in the mantle chamber — How mud is discharged from 



