336 HELIX. SNAIL. Class VI. 



48. bifas- Lin. Tr. viii. 210. T. fasciatus. Br. Zool. iv. 



ciata. MmL TgsL Br 346> idt 31> 



Sup. t. 22. f. 1. 



* He. with a subumbilicated, pyramidal ob- 

 long rough shell; volutions roundish; aper- 

 ture ovate ; length one inch. 



Wales and western coast. Tab. lxxxv.^g". 5. 



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



Lin. Tr. viii. 211. t. b.f. 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. Tr. viii. 211. H. octona. Br. Zool. iv. 



fracta. MmL TesL Br# 3g6i {n 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. lxxxix. Jig. 5. 



