THE CRAYFISH 
AN INTRODUCTION TO 
THE STUDY OF ZOOLOGY 
BY 
T. H. HUXLEY, F.RB.S. 
— 
WITH EIGHTY-TWO ILLUSTRATIONS 
SEVENTH EDITION 
LONDON 
KEGAN PAUL, TRENCH, TRUBNER & Co,, Lr? 
DRYDEN HOUSE, GERRARD STREET, W. 
1906 - 
