86 MALACOZOA. GASTEROPODA. FULMOIiRAXCHIATA. 



distinctly separated by the suture ; the base rather convex, with 

 a shallow undefined umbilicus, encroached upon by the peri- 

 stome ; aperture semilunar, oblique, with the margin thin, but 

 reflected and a little thickened near the umbilicus ; the colour 

 olivaceous, or deep yellowish-grey. Diameter a tenth of an 

 inch or somewhat more, height nearly the same. 



Found by me, in April, 1842, among moss in the Links 

 near Don-Mouth, along with Bulimus lubricus, Helix pulchella, 

 and Vitrina pellucida ; also on the Banks of the Don, near the 

 Old Bridge. In September found by Mr. Leslie near In- 

 verury; in August and September by Miss Macgillivray in 

 the Den of Auchmedden, and at Delgaty. 



Helix fulva. Drap. 81. T. 7. f 12-13. — Helix Trochulus. Mul- 

 ler, Verm. Terr, et Fluv. ii. 79. ? — Helix trochiformis. Mont. Test. 

 Brit. 427. PI. 1 1. fig. 9.— Helix Trochulus. Flem. Brit. Anim. 260. 

 —Helix fulva. Gray's Turton, 148. PI. 5. f. 47. 



This evidently is not Helix fulva of Muller, which he de- 

 scribes as attaining a diameter of three lines, with the tip acute 

 and white, and the whorls seven. 



7. Helix lamellata. Lamellate Snail. 



Shell conico-convex, with six whorls, which are well rounded, 

 thin, semitransparent, glistening or sattiny, with numerous, 

 regular, thin, lamella?, and very distinctly separated by the 

 suture ; the base convex, with a small but deep umbilicus ; 

 aperture narrow crescent-shaped, thin ; the colour reddish- 

 brown. Diameter a twelfth of an inch, height nearly the same. 



Distinguishable from Helix Trochulus by its laminae, umbili- 

 cus, less convex and regularly tapering spire. 



Found by Mr. Dickie, the most distinguished of our botanists, 

 in the Den of Rubislaw, on leaves of the Acer Pseudo-platanus. 

 Both he and Mr. Cruickshank have favoured me with speci- 

 mens. 



Helix Scarburgensis. Turton, Land and Fresh Water Shells, 

 Ed. i. 162. — Helix lamellata. Jeffreys, Linn. Trans, xvi. 333.— 

 Helix lamellata. Gray's Turton, 150." PI. 5. f. 48. 



8. Helix aculedta. Prickly Snail. 



Shell globoso-conical, with five whorls, which are rounded, 

 thin, semitransparent, glistening, with a longitudinal series of 

 oblique pointed laminae ; the suture deep ; the base convex, 

 with the umbilicus moderate ; the aperture roundish-lunate ; 

 the colour greyish-brown. Diameter about the tenth of an inch. 



Found by Mr. Dickie, in the Den of Rubislaw. 



