TABLE OF GENERA. 67 



* * Mouth longitudinal, dextral. 

 f Pillar-lip smooth, not folded. 



12. SUCCISEA. Shell oval, amber-coloured; mouth large; front 



entire, rounded. 



13. BULIMUS (acutus). Shell turreted, white, variegated j mouth 



moderate ; front entire, rounded. 



16. ACHATINA. Shell turreted, white ; mouth moderate ; front 

 truncated. 



f \ Pillar with an oblique fold. 



24. LIMN^US. Shell ovate or subturreted, perforated ; inner lip 



not expanded. 



25. AMPHIPEPLEA. Shell ovate, very thin, imperforated ; inner lip 



rather expanded. 



* * * Mouth longitudinal, sinistral. 

 \ Pillar-lip smooth ; shell very thin, imperforated. 



28. PHYSA. Shell ovate; inner lip rather expanded. 



29. APLEXUS. Shell turreted ; inner lip not expanded. 



j- -j- Pillar-Up with an oblique fold. 

 24. LIMN^EUS pereger lineatus. A monstrosity. 



b. Shell moderately thick ; peristome not thickened, continued. 



* Shell grooved, variegated, ovate ; mouth suborbictilar. 

 32. CYCLOSTOMA. 



* * Shell smooth, olive ; mouth ovate or orbicular. 



o. VALVATA. Shell conical or depressed, umbilicated ; mouth 

 orbicular. 



3. PALUDIXA. Shell ovate, conical, perforated, olive, banded ; 



mouth ovate. 



4. BITHIMA. Shell ovate, conical, perforated, transparent ; 



mouth ovate. 



2. ASSIMIMA. Shell ovate, conical, solid, brown ; mouth ovate. 

 22. ACME. Shell subcylindrical, blunt, solid, brown; mouth 

 ovate. 



