i BD. Ee &. 
PART 1 
UNIVALVIA INVOLUTA. 
GENUS 5. BULLA. DIPPER, 
* MARINA. SEA. 
Plate. Fig. 
Bulla lignaria, wood - - 
- PP 27 
PART TL 
UNIVALVIA TURBINATA. 
TROCHUS TOP SHELL. 
* MARINE. SEA. 
conulus, conule es - . - - 8 26 
Trochus tuberculatus, knobbed - - - > 3 Ie 
COCHLEZ, OR SNAILS. 
GENUS 8. NERITA, NERIT. 
* FLUVIATILES, RIVER. 
Nerita Fluviatilis. River 
Pe - - - 16 Ze 
MARINZE SEA. 
Nerita Littoralis. Strand = - = a 20 2. 
Nerita Pallidulus, pale 2 Es 2 16 I. 
GENUS 9. HELIX. 
* TERRESTRES, LAND. 
HELIX. 
Cochlea fasciata, girdled ~ 
3 
Ze 
