83B TURBO. 



RUBER. 50. Shell minute, with five pellucid soiootli 

 glossy rounded whirls ; aperture sub-orbi- 

 cular, and the lip a little reflected on the 

 pillar. 



Turbo ruber. Adams in Lin. Trans, iii. p. 66. t. 13. f. 

 21 and 22. Montagu Test. p. 320. Maton and Rac- 

 ket, in Lin. Trans, viii. p. l62. 

 Inhabits the coasts of Pembrokeshire. Adams. Cornwall. 



Montagu. 

 Shell about an eighth of an inch long, and scarcely one third as 

 broad, of an uniform reddish brown colour, or sometimes 

 white ; it has five whirls separated by a fine suture, and the 

 summit is pointed. 



viTREUS. 51. Shell minute, sub-cylindrical, with 

 four rounded whirls ; aperture sub-oval and 

 a little contracted at the upper end. 



Turbo vitreus. Montagu Test. p. 321. t. 12. f. 3. 

 Helix vitrea. Maton and Racket, in Lin. Trans, viii. p. 

 213. 



Inhabits the coasts of Cornwall. Montagu. 



Shell one eighth of an inch long, and one third as broad, white, 

 smooth, and pellucid ; Mr. Montagu says, " this species 

 must not be confounded for the white Variety of the last 

 described ; it is more slender, the volutions are stronger and 

 run singularly more oblique ; and it is at once distinguished 

 by its sub-cylindric shape, in which it resembles more the 

 T. striatus; but differs from that shell in being perfectly 

 smooth, and in not having a marginated aperture. The co- 

 lumella of this species is visible through the shell." 



PUNCTURA. 52. Shell conical, minute, glossy, with 

 six rounded and finely reticulated whirls. 



Turbo Punctura. Montagu Test. p. 320. t. 12. f. 5. 

 Helix Punctura. Maton and Racket, in Lin. Trans, viii. 

 p. 214. 



Inhabits the coasts of the West of England, but is very rare. 

 Montagu. 



Shell about one tenth of an inch long, and one third as broad, 

 of a transparent yellowish white colour ; Mr. Montagu says, 

 ** its beauty is only to be seen under a strong magnifier, as 

 the work is extremely fine ; by the aid of a microscope it 



