880 TURBO. 



are not always readily discoverable till the aperture lias been 

 well cleaned, and even that accurate naturalist may possibly 

 have overlooked this circumstance. Bruguiere says his Bu- 

 limus minimus differs in being a water species, and in having 

 the aperture marginated. 



VERTIGO. 154. Shell oval, with five reversed and 

 faintly striated whirls; aperture sub-triangu- 

 lar, slightly marginated, and toothed. 



Turbo Vertigo. Montagu Test. p. 363. t. 12. f. 6. Maton 



and Racket, in Lin. Trans, viii. p. 183. 

 Helix Vertigo. Gmelin, p. 3664. 



Vertigo pusilla. Muller Ferm. ii. p. 124. Schroeter Fluss, 

 p. 349. 



Inhabits rotten wood in Denmark. Muller. Walls covered 

 with ivy at Sandwich. Montagu. 



Shell not much more than half a line long, opake, and of a 

 brownish colour; the aperture is irregular, and somewhat 

 triangular with rounded angles. Sometimes there are three 

 teeth, one on the outer and two on the inner lip, and there 

 are sometimes six with the rudiment of a seventh. This spe- 

 cies is nearly allied to T. sexdentatus, but is more cylindri- 

 cal, and more obtuse at the summit, and the whirls are re- 

 versed. 



CARYCHiUM. 155. Shell conical, polished, and pel- 

 lucid; aperture marginated, with two teeth 

 on the inner, and a knob on the outer lip. 



Turbo Carychium. Montagu Test. p. 339. t. 22. f. 2. Ma- 

 ton and Racket, in Lin. Trans, viii. p. 184. Dorset 

 Cat. p. 52. t. 19- f. 13. 

 Carychium minimum. Muller Ferm. ii. p. 125. Schroe- 

 ter Fluss. p. 324. Leach Zool. Misc. i. p. 84. 

 Helix Carychium. Gmelin, p. 3665. 

 Inhabits woods and mossy banks, frequent iu Great Britain. 



Montagu. 

 Shell hardly a line long, and only one-third as broad, white, 

 glossy, and pellucid ; it has five convex whirls, which are 

 finely striated longitudinally, and well defined by the suture ; 

 the pillar-lip is furnished with two teeth, and there is some- 

 times the rudiment of a third above the other two. 



AURiscALPiUM. 156. Shell turreted, white, and 

 very smooth; aperture with a flattish con- 

 cave obtuse reflected lip. 



