ALPHABETICAL INDEX 



OF THE 



PRINCIPAL FAMILIES AND GENERA OF MOLLUSCA 

 EXHIBITED IN THE SHELL GALLERY. 



This Index has been compiled to assist the numerous visitors, who wish to 

 examine and determine specimens of shells, in finding, without trouble or loss 

 of time, the Cases in which the genera are placed. Subgeneric terms are omitted, 

 as they do not fall within the scope of this ' Guide '. 



CASE 



Cylindrella . . 127 



Cypraea . . 32-5 



Cyprina=Arc- ) „ 



tica \ lbZ 



Cyrena ... 164 

 Cythera=Mere- 



trix 



185 



