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CONTENTS.
CHAPTER V. PAGE
The Comparative Morphology of the Crayfish. ture
AND THE DEVELOPMENT
The struc¬
OF THE CRAYFISH COMPARED
WITH THOSE OF OTHER LIVING BEINGS
227
.
CHAPTER VI. The Distribution and the ^Etiology of the Crayfishes .
NOTES.
BIBLIOGRAPHY
INDEX
.
238
347
.
357
363
