INDEX, 



PART III. 



UNIVALVIA TURBINATE 



GENUS 7. TROCHUS. THE TOP. 



MARINE. SEA. 



Trochus cinereus 



Plate. Fig. 

 *55 * 



GENUS 9. HELIX. 



* TERRESTRES. LAND. 



Helix Erica 

 ' hispida 



■^— rufesctns 



151 s 

 151 s 



1.57 « 



** FLUVIATILES. RIVER. 



Turbo trianfractus 



16S 



GENUS 12. STROMBIFORMIS. NEEDLE SNAIL. 



Strombiformis albus 



177 



