TURBO. TURBAN. 203 



but not reflected : length the eighth of an inch ; breadth 

 one third of its length. 



It differs from the -white variety of the last, in being of a 

 more slender and somewhat cylindrical form, with the vo- 

 lutions much stronger arid more oblique. 



Western coasts, and Dublin bay : rare. v. m. 



24. Turbo unifasciatus. Single-banded Turban. 



Montagu, pi. 20. f. 6. 



Shell conic, smooth, thick, whitish with a purplish-brown 

 band on the larger volution, sometimes two but occupying 

 the same space as when there is only one, and placed close 

 to the line of separation : spires five, hardly raised, and 

 divided by a small line : aperture roundish-oval ; the outer- 

 lip thin, turning a little outwards ; pillar-lip slightly 

 spread : length the eighth of an inch 5 breadth not half as 

 much. 



On the leaves of Fuel. v. v. 



25. Turbo labiosus. Wide-mouthed Turban. 



Dorset Cat. pi. 18. f. 16 Pennant, pi. 82. f. 8. 



Helix labiosa. Montagu, pi. 13. f. * 



Shell somewhat conic, tapering to a rather fine point, light 

 horn-color, with often coarse white blotches, semitranspa- 

 rent, sometimes covered with a yellowish-brown skin, and 

 mostly purple at the tip : spires six or seven, rarely eight, 

 a little rounded and well defined, with from fifteen to 

 eighteen longitudinal ribs, which are sometimes faint and 

 sometimes strong and well rounded, extending along the 

 upper part of the larger volution and the whole cf the two 

 next, the remaining volutions being quite smooth ; the 

 larger spires are also frequently marked with obscure ob- 

 lique and often undulated brown lines : aperture glossy, 

 oval, dilated, covering nearly half of the shell, rather oblique, 

 produced and rounded at the bottom ; the outer margin 

 expanded, thin, and a little reflected, with a rib at the back, 

 contracted in the throat by the thickening of the sheD, and 

 mostly edged with purplish-brown; the back a little gib- 

 bous and smooth, of a paler color ; pillar-lip reflected and 

 forming a slight cavity behind it, undulate within and form- 

 ing an indenture or tooth-like elevation : length a quarter 

 of AH inch j breadth a third of its length. 



Variety. 



