American JJature feerietf 



Group IV. Working with Nature 



SHELL-FISH INDUSTRIES 



BY 



JAMES L. KELLOGG 



PROFESSOR OF BIOLOGY IN WILLIAMS COLLEGE 



ILLUSTRATED 



^ Of THE 



UNIVERSITY 4 j 



OF 

 .CALUfQHt** 



NEW YORK 



HENRY HOLT AND COMPANY 

 1910 



