INDEX. 

 PART II. 



UNIVALVIA INVOLUTA. 



GENUS 5. BULLA. DIPPER. 

 * MARINi^. SEA. 



Bulla lignaria, wood 



Plate. Fig. 

 27 



PART III. 



UNIVALVIA TURBINATA. 

 TROCHUS TOP SHELL. 



* MARINiE. SEA. 



conulus, conule 



Trochus tuberculatusi knobbed 



COCHLEiE, OR SNAILS. 



GENUS 8. NERITA, NERIT. 



* FLUVIATILES, RIVER. 



Nerita Fluviatilis. River 



Merita Littoralis. Stranci 

 Ncrita Pairi<:iuii;s, pale 



MARINi^I SEA. 



i6 



zo 

 i6 



a. 3J 

 z. 



Cochlea fasciata, girdled 



GENUS 9. HELIX. 



* TERRESTRES. LAND. 

 HELIX. 



iS 



