HELIX. 917 



t. 2. f. 1 to 5. Montagu Test. p. 429- 1. 11. f. 10. Ma- 

 ion and Racket, in Lin. Trans, viii. p. 201. Dorset 

 Cat. p. 54. t. J 9. f. 23. 

 Inhabits woods in Denmark. MuUer. England. Lightfoot, 



Sfc. 

 Shell about one-tenth of an inch both in length and breadth, 

 thin, serai-pellucid, and of a brownish horn-colour, with re- 

 gular membranaceous bristly strias ; Mr. Montagu says " the 

 striae of this species seem to be formed by the epidermis, 

 which rises in some parts into thin flat bristly processes that 

 give it a spinous appearance ; neither these nor the striae are 

 testaceous, but flexible and easily rubbed off." 



LACUNA. 70. Shell sub-globular, with four ventri- 

 cose smooth whirls ; aperture large and nearly 

 orbicular, and the pillar sinuated. 



Helix Lacuna. Montagu Test. p. 428. t. J 3. f. 6. Ma- 

 ton and Racket, in hin. Trans, viii. p. 201. 



Inhabits the sea-shore near Southampton, and other parts of 

 the West of England, about high-water mark. Montagu. 



Shell about a quarter of an inch both in length and breadth, of 

 a pale horn-colour, sometimes marked with two reddish 

 brown bands. Mr. Montagu says, " the first whirl is large, 

 the two uppermost very small, and placed somewhat lateral ; 

 pillar-lip thick, white, and grooved with a long canal or gut- 

 ter, which terminates in a small but deep umbilicus." Ma- 

 ton and Racket say it is nearly allied to H. ampullacea, and 

 Montagu has compared it with Nerita pallidula, from which 

 it strikmgly differs in the much smaller size of the body- 

 whirl and aperture. 



AMPULLACEA. 71. Shell sub-umbilicated, ventri- 

 cose, nearly globular, and the spire depres- 

 sed ; aperture ovate-oblong, and the umbili- 

 cus small. 



Helix ampullacea. LinneBus Si/st. Nat. p. 1244. Born 

 Mus. p. 374. Schroeter F/uss. p. 249. t. 6. f. 2, and t, 

 9. f. 14; and Einl. ii. p. 142. Chemnitz, ix. part 2. p. 

 105. t. 128. f. 1133 to 1 135. Gmelin, p. 3626. Shaw 

 Nat. Misc. xiv. t. 576. Brookes s Introd. p. 129. t. 8. 

 f. 112. 



Nerita ampullacea. Muller Verm. ii. p. 172. 



Bulimus ampullaceus. Bruguiere Enc. Meth. p. 297. 



Lister Conch, X. 130. f. 30. Rimphius, t. 27. f. Q. Pe- 

 VOL. II. a 



