In drawing out c Lessons on Shells,'' the following works have 

 been consulted, and extracts made from them. 



Burrows' Elements of Conchology. 



Turton's Conchological Dictionary. 



Turton's Bivalve Shells of the British Isles. 



Mawe's Conchology. 



Montagu's Testacea Britannica. 



Fleming's Philosophy of Zoology. 



Lamark's Histoire Naturelle des animaux sans 



Vertebres. 



The Conchologist's Companion. 

 Shaw's Nature displayed. 



Sowerby's Genera of Recent and Fossil Shells. 

 Dillwyn's Descriptive Catalogue of Recent 



Shells. 



The plates which illustrate this work have been drawn from 

 specimens actually presented to the class : they are intended 

 as an assistant to the teacher, but not as a substitute for the 

 shells themselves in the instruction of pupils. 



