M oil usca of Great Britain. 377 



Helix octona. Lin7i. St/st. Nat. 4. p. 1248. Penn. Brit. 



Zool. 4<. p. 13S. t. 86. f. 135. 

 octanfracta. Mont. Test. Brit. p. 396 & 588. 



t. 11./. 8. 



peregrina. Dillw. Cat. 2. p. 954. 



a. subovata ; anfractus 6, quorum infimus dimidium testae 

 subaequans. 

 Buccinura glabrum. Miill. Verm. 2. p. 135. 



In many parts of the North of England ; though a local 

 shell. The variety is from Yorkshire. The outer lip of the 

 aperture is often thickened exteriorly by a white rib. 



8. Tritncatulus. 



Animal cinerascens. Tentacula brevia, acuminata. 



Testa ovato-oblonga, acuminata, fragilis, substriata, flaves- 

 centi-cinerea. Anfractus 6, ventricosiores, supern^ an- 

 gulati, sutur^ excavate. Apertura ovato-oblonga. 



Long. 0.425.— Diam. 0.2. 

 Limneus minutus. Drop. Hist, des Moll. p. 53. t. 3. 



/. 5-7. 

 Buccinum truncatulum. Miill. Verm. 2. p. 130. 

 Helix Fossaria. Mont. Test. Brit. p. 372. t. 16. f 9- 

 MatonSf Rackett in Linn. Trans. 8. p. 217. i.5.f.9- 

 Dillw. Cat. 2. p. 964. 

 Bulimus peregrus. Brug. Encycl. Meth. n. 10. 

 a. minor, cornea, ventricosior. 

 13. magis cylindrica, fulva; sutur4 obliquiore. 

 Nerita minuta. Miill. Verm. 2. p. 174? 



Common nearly every where in ditches ; often found in 

 marshes occasionally overflowed by the sea. 



The variety )Q. is remarkable for its more cylindrical form, 



3 c 2 obtuse 



