HELIX. 971 



Buccinum glutinosum. Midler Verm. ii. p. 129. Schroe- 



ter Fluss. p. 9.71. No. 79- 

 Bulimus glutinosus. Briiguiere Enc. Meth. p. 306. 



Inhabits fresh water on the leaves of Nymphsea hitea, in Den- 

 mark, but not common. MuUer. England. Montagu. 



Shell rather more than half an inch long, and three-eighths 

 broad, of a glossy yellowish horn-colour, and nearly smooth 

 or only obsoletely wrinkled ; it has two or three whirls, of 

 which the body-whirl occupies almost the whole shell, and 

 the spire, as Mr. Montagu says, is so extremely small and 

 so little produced as scarce to be seen, when the shell is ly- 

 ing with its aperture upwards ; it may be readily distinguish- 

 ed from the young of H. miricularia by its almost membra- 

 naceous texture, and by its obtuse and depressed summit. 

 Mr, Montagu has remarked that the sub-umbilicus formed 

 by the repand lip of H. auricularia is wanting in the present 

 species, and that the animals also are essentially different. 



LAEVIGATA. 186. Shell imperforate, ob-ovate, ex- 

 tremely obtuse, pellucid, and very smooth. 



Helix laevigata. Linnaus S;j/st. Nat. p. J 250. Pennant 

 Zool iv. p. 140. t.86. f. 139. Gmelin, p. 3663. Dono- 

 van, iii. t. 105. Montagu Test. p. 382, and Supp. p. 

 140. Maton and Racket, in Lin. Trans, viii. p. 222. 

 Dorset Cat. p. 56. t. 18. f. 9- 

 Helix haliotoidea. Fabricius Fauna Groenlandica, No. 



387. 

 Helix haliotoidea, Var. ^. Gmelin, p. 3664. 

 Bulla velutina. Muller Zool. Dan. iii. p. 32. t. 101. f. 1 

 to 4. 

 Inhabits the Northern Ocean. Muller. Coasts of GreSt Bri- 

 tain. Pennant, Sfc. 

 This shell is often not larger than a pea, and rarely attains half 

 an inch, but is sometimes three-quarters of an inch long, 

 and five-eighths broad ; it is thin, brittle, pellucid, flesh-co- 

 loured, slightly striated longitudinally and transversely wrink- 

 led ; when alive it is always covered with a dark brown 

 wrinkled epidermis ; there are three whirls, of which the 

 body- whirl is very large, and ends suddenly in a lateral de- 

 pressed and very small, but well defined spire ; the aperture 

 is vastly large, and the inside is white or of a pale purplish 

 brown colour. It is not in the least like the Linnscan H. 

 haliotoidea. 



