152 BULLETIN OP THE BUREAU OF FISHERIES. 



Chapter ~ IX. Reproduction— Continued. ^*^° 



Arrangement and distribution of the eggs and their attachment to the body . ■ 3 5 



Origin of the egg glue and fixation of the eggs ^ 



The oviduct and its periodic changes ^ ' 



Comparisons with other Crustacea, and theories of fixation 3 



The male sexual organs ^ 



Sperm cells, their origin and structure -^ 



Fertilization ^ ^ 



The seminal receptacle, copulation, and impregnation 3 



X. Development 3 



Analysis of the course of development 3^° 



Embryo 3^2 



Exclusion and dispersal of the brood 3^° 



Hatching process 3^7 



First larva 3^9 



Color of the larva 33"^ 



Structure and habits 33^ 



Natural food of the larva 335 



Second larva 337 



Third larval stage 33^ 



Fourth or lobsterling stage 34° 



Color in the fourth stage 34i 



Fifth stage 342 



Sixth stage .^ 344 



Seventh stage 344 



Eighth and later stages 346 



Habits of adolescent lobsters 346 



A lobster 413 days old 347 



When does the young lobster go to the bottom to stay? 347 



Food and causes of death in artificially reared lobsters 349 



Significant facts of larval and later development 350 



XI. Behavior and rate of growth 353 



t — Behavior of young lobsters 353 



(—Reactions to light 354 



■"~ Reactions to other stimuli 356 



•— Movements of the young lobster in a state of nature 357 



<^ Variation in the rate of growth and duration of the stage periods 358 



♦— Conditions which determine the rate of growth and duration of the stages. . . 359 



♦- Rate of growth and age at sexual maturity 360 



XII. The preservation and propagation of the lobster. . . . , 367 



The fact and cause of decline of the fishery 367 



The problem 369 



How the problem has been met 369 



Closed seasons 370 



Protection of berried lobsters 370 



The gauge law 371 



The life rate or law of survival 375 



Propagation of the lobster 379 



Recommendations 382 



Bibliography of the lobster — Homartis 384 



