Dr. Tate on the Mollusca of Alnwick. 113 



cheugh, Hulne woods, &c. 

 Shell flattened, spire scarcely raised ; colour, deep horn 

 or amber ; shining, transparent ; under surface with- 

 out any white opacity ; upper surface regularly and 

 distinctly striated, the striae continued from whorl to 

 whorl and not interrupted by the sutures ; under sur- 

 face smooth ; whorls 3i to 4, flattened, particularly 

 above ; body whorl much larger than that preceding 

 it ; sutures shallow and broad from the arching up- 

 wards of one whorl to join that next to it ; umbilicus 

 moderately large ; aperture oblique, crescent-shaped, 

 broader than high ; diameter from l-12th to l-6th of 

 an inch. 



6. Z. purus. Alder. 



Not uncommon among moss, decaying leaves, stumps 

 of trees and under stones in woods and pastures. 

 Ratcheugh, Hulne, and Rugley woods, &c. 



Shell flattened, with the spire very slightly raised ; colour, 

 white, rarely very pale amber ; transparent, not very 

 shining ; under surface without opacity ; upper surface 

 smooth or slightly wrinkled ; whorls 32 to 4, rather 

 flattened above ; body whorl much larger than that 

 preceding it ; sutures well defined, deep and narrow ; 

 umbilicus moderately large ; aperture oblique, crescent- 

 shaped, broader than high ; diameter 1-lOth to l-6th 

 of an inch. 



7. Z. crystallinus, Miill. 



Common among moss, herbage, decaying leaves, and 

 under stones in woods, pastures and hedge-rows. 

 Ratcheugh, Hulne woods, &c. 



Shell flattened, with the spire very slightly raised ; colour 

 white or with a slight greenish tinge ; very shining and 

 transparent ; under surface without opacity ; upper 

 surface smooth or slightly wrinkled ; whorls iii to 5, of 

 gradual increase, the body whorl being but little larger 

 than that preceding it ; whorls flattened above ; sutures 

 well defined ; umbilicus very small ; aperture not very 

 oblique, crescent-shaped, about as broad as high ; dia- 

 meter from l-12th to l-8th of an inch. 



8. Z. excavatus, Bean. 



Very rare. Hulne woods about the decaying stumps of 



trees. 

 Shell depressed, subglobular ; colour that of darkish horn ; 



shining and transparent ; under surface not obscured 

 H 



