336 HELIX. SNAIL. Class VI. 



48. BIFAS- Lhi. Tr. viii. 210. T. fasciatus. Br. Zool. iv. 



S'Mp. ;. 22. /.I. 



* He. with a subumbilicated, pyramidal ob- 

 long rough shell; volutions roundish; aper- 

 ture ovate ; length one inch. 



Wales and western coast. Tab. Ixxxw.Jig. 5. 



49. ocTONA. Gm. Lin. 3653. Mont. Test. Br. Sup. 144. 



Lin. Tr. viii. 211. t. 5./. 10. 



* He. with a somewhat perforated, pyramidal 

 shell of eight volutions ; aperture roundish ; 

 size of a grain of rye. 



Found in wet meadows; doubtful if an 

 English species. 



-50. OCTAN- Lin. T)-. viii. 211. H. octona. Br. Zool. iv. 



FRACTA. Mont. Test. Br. 3gQ.i.U. 138. 



/. 8. id. Sup. 144. 



* He. with an imperforated, pyramidal sub- 

 striated shell, having eight volutions ; aperture 

 ovate ; length five eighths of an inch, breadth 

 two eighths of an inch. 



Rarely found in stagnant waters in Cornwall 

 and Dorsetshire. Tab. Ixxxix. Jig. 5. 



