QL 

 LIDS' 



2Bo^ton J^Dcietp of i^atural i^i^torp. ^"^^^ 



GUIDES FOR SCIENCE-TEACHING. 

 No. VI. 



The Oyster, Clam, and Other 



Common Mollusks 



Dhfeion of Mollusk 

 Sectional Librcay 



By ALPHEUS HYA^ 



MAR 28 1988 

 ubRmts 



BOSTON: 



GINN AND HEATH. 



1881. 



