CONTENTS. 



■^ Page. 



Introduction 'S3 



Chapter I. The lobsters and allied Crustacea; their zoological relations, habits, development, 



and use as food ■'■SS 



Natural history of the Crustacea '55 



Development of the Crustacea ' 



Family life in crajrfish '"7 



II. The American lobster; its economic importance and general habits '°9 



4 ( • Geographical range '7° 



History and importance of the lobster fisheries in brief '7° 



Capture, transportation, and acclimatization of the lobster '73 



Habits and instincts of the adult lobster '77 



^ Migratory instincts '8° 



Movements of tagged lobsters i8o 



Movements off Cape Cod and at Woods Hole i8i 



j^ .^ Optimum temperature 182 



*— «' Influence of light and nocturnal habits 183 



^ -BiuTowing habits 184 



« Food and preying habits 185 



te. Cannibalism 188 



* — ' Review of the instincts and intelligence of the adult lobster 188 



Color in the adult 191 



III. Giant lobsters 194 



Greatest size attained by the lobster 194 



IV. Molting 200 



The skin and shell 200 



Periods, conditions, and significance of molting 201 



The molting act 204 



Withdrawal of the big claws 206 



Molting of the "hammer claw" in the snapping shrimp Alpheus 207 



Changes in the skeleton preparatory to molting 207 



The gastroliths or stomach-stones 208 



Hardening of the new shell 211 



Relation of weight to length in adult 212 



Proportion of waste to edible parts in the lobster 2 14 



V. Enemies of the lobster 215 



4 — 'Predaceous enemies 215 



<— Parasites and messmates 215 



^^ Diseases and fatalities of the lobster 217 



VI. Anatomy of the lobster, with embryological and physiological notes 219 



Body ■ 219 



Internal skeleton and head 220 



Appendages 222 



Mouth parts 227 



The slender legs 229 



Central nervous system 230 



Peripheral stomato-gastric system 231 



Sense organs 232 



'5° 



