224 TURBO. TURBAN. 



a correspondent enlargement of the primary volution, as 

 answering to its necessary character, " apertura subeilusa," 

 or having the aperture narrow and much extended. These 

 shells therefore, under our consideration, having the aper- 

 ture more or less oval or orbicular, and the primary volu- 

 tion not larger than its usual proportion to the others, na* 

 turally fall into this division of the genus Turbo. 



H. With the spires reversed, 79 to 85. 



79. Turbo bidens. Tuo-toothed Turban. 



Pennant, pi. 84. f. 5 Lfmn. Trans, viii. pi. 5. f. 3. 



Shell tapering, smooth, brown, transparent : spires ten 

 or eleven, armed with a series of small white bead-like pro- 

 jections which wind spirally round the junctions of the vo- 

 lutions, giving this part a slightly crenate or notched ap- 

 pearance : aperture oval, with two teeth placed deep within 

 the mouth : length about half an inch ; breadth a fourth of 

 its length. 



Found in the Pulteney cabinet, supposed to be from Dor 

 setshire. 



80. Turbo laminatus. Laminated Turban. Fig. 70. 



Montagu, pi. 11. f. 4 Dorset Cat. pi. 19. f. 9. 



Shell tapering to a round point, swelling a little above 

 the mouth, reddish horn-color, transparent, smooth or very 

 obscurely wrinkled, with ten rather raised and well denned 

 volutions : aperture somewhat orbicular, contracted at the 

 upper and outer margin, at which part it joins the body 

 volution ; the outer-lip white, slightly margined and re- 

 flected; pillar-lip a little thickened, not raised nor detached 

 from the body of the larger volution, with two white tooth- 

 like folds, and deep within the mouth are three or four pro- 

 minent ridges, only visible within the shell when held up 

 before the light : length three-quarters of an inch ; breadth 

 a fourth of its length. 



Woods in Wiltshire and Kent : rare. v. m. 



81. Turbo biplicatus. Folded Turban. 



Montagu, pi. 11. f. 5. 



Shell taper, opake, brown, a little swollen above the 



