TURBO. 839 



appears delicately punctured all over, and wrought with ex- 

 tremely fine decussated striai." 



ARENARius. 53. Shell conical, minute, with five 

 rounded whirls, and decussated strise. 



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



f. 33 and 34. ? 

 Turbo decussatus. Mo7itagu Test. p. 322. t. 12. f. 4. 

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



p. 214. 

 Walkers Minute Shells, f. 52. ? 

 Found among sand in Salcomb Bay on the coast of Devon. 



Montagu. 

 Shell scarce one-eighth of an inch long, and not half so broad ; 

 Mr. Montagu says, *"' it differs from T. Punctura in being 

 more inclined to a cylindric form, more strongly striated 

 longitudinally, and in the aperture being more oval." 



UNiFASciATUs. 54. Shell conical, minute, smooth, 

 with five flattish transversely fasciated whirls; 

 outer lip expanded. 



Turbo unifasciatus. Montagu Test. p. 327. t. 20. f.6. Ma- 

 ton and Racket, in Lin. Trans, viii. p. l63. 

 Turbo trifasciatus. Adams in Lin. Trans, v. p. 2. t. 1. f. 

 12 and 13. 



Inhabits the coasts of Great Britain. Adams, 8fc. 



Shell about one-eighth of an inch long, and more than one- 

 third as broad, white, with one, or sometimes two, purplish 

 brown bands on the body, and one on the second whirl ; Mr. 

 Montagu says that when there are two bands they occupy 

 no more space than when there is hut one ; aperture sub- 

 oval, with the outer lip thin and turning outwards. 



Nivosus. 55. Shell minute, sub-turreted, obtuse, 

 smooth, with five or six rounded whirls, and 

 the pillar quite smooth and even. 



Turbo nivosus. Montagu Test. p. 326. Maton and Rac- 

 ket, in Lin. Trans, viii. p. l63. 

 Inhabits the coasts of Devonshire, very rare. Mo7itagu. 

 Shell scarcely one line long, and hardly one third as broad ; it 

 is white and glossy, and has the aperture sub-oval ; in shape 

 it somewhat resembles Valuta interstincta, but has not any 

 ribs or tooth on the pillar. 

 s 2 



