Memoirs of the Museum of Comparative Zodlogy 
AT HARVARD COLLEGE. 
Wort, Us INGE 
NOTES ON THE CRAYFISHES 
IN THE 
UNITED STATES NATIONAL MUSEUM 
AND THE 
MUSEUM OF COMPARATIVE ZOOLOGY 
WITH DESCRIPTIONS OF NEW SPECIES AND SUBSPECIES 
TO WHICH IS APPENDED 
A CATALOGUE OF THE KNOWN SPECIES AND SUBSPECIES. 
BY 
WALTER FAXON. 
Wirth THIRTEEN PLATES. 
CAMBRIDGE, U. S. A.: 
Printed for the Museum. 
JuLy, 1914. 
