202 TURBO. TURBAN. 



ture behind it like an incipient perforation : length three- 

 eighths of an inch ; breadth two. 



Mr. Dillwyn, in referring to the plates of Da Ccsta and 

 the Dorset Catalogue, has quoted the figures from 1 to 3, 

 including within this number the Voluta Tornatilis, 



English and Irish coasts, on Fuci. v, v. 



21. Turbo nivosus. White Turban. 

 Montagu, p. 326. 



Shell rather slender, tapering to a somewhat obtuse 

 point, smooth, glossy- white : spires five or six, much 

 rounded and deeply divided by the line of separation : aper- 

 ture roundish-oval ; the inner-lip and pillar quite smooth 

 and even : length about a line ; breadth jot half as much. 



The specimens which we have collected as this obscure 

 species, very much resemble the T. Ulva, but are about 

 half the size, and are distinguished by tie swollen and 

 founded volutions, with the pillar-lip not u the least re 

 fleeted, nor forming any kind of perforation Behind it. 



Western coasts, and Dublin bay. v. m. 



22. Turbo ruber. Red Turban. 



Linn. Trans, iii. pi. 13. f. 21, 22. 



Shell conic, smooth, glossy, red-brown, pointed : spires 

 five, rounded, divided by a fine line : aperture somevhat 

 orbicular, not margined, a little reflected on the pilar : 

 length the eighth of an inch ; breadth about a third <f its 

 length. 



It may be distinguished from the smaller specimen} of 

 T. Ulvae, by the swollen and well rounded volutions, their 

 number, and its glossy surface. 



Variety. Quite white, and so transparent that the whole 

 of the pillar may be seen through the shell. 

 Western coasts, and Dublin bay. v. v. 



23. Turbo vitreus. Glassy Turban. 



Montagu, pi. 12. f. 3. 



Shell thin, transparent, white, smooth: spires five, much 

 rounded and well defined, ending rather obtusely : aperture 

 ,pval, contracted at one end - y inner*lip a little thickened, 



but 



