250 X r OLUTA. VOLUTE. 



larger Volution, and often tinged -with green towards the 

 outer-lip ; the first very large and cylindrical ; the others 

 small and hardly raised ; the outer-lip thin, with two or 

 three tubercles near the margin ; pillar with from two to 

 four tooth-like folds : length half an inch 5 breadth not a 

 quarter. 



The tubercles on the outer-lip are seldom to be observed^ 

 and we rather suspect that the present and the next spe- 

 cies have been generally combined together. 



Inlets of the sea, with the Turbo Ulvae. v.-v. 



3. Voluta fingens. Double-toothed Volute. 



Shell oval, tapering to a rather obtuse point, whitish 

 horn-color, transparent : spires six or seven, rounded and 

 well defined, striate or wrinkled longitudinally, the first 

 volution large and occupying more than half the shell: aper- 

 ture narrow-oval, the outer-lip very thin, with four or five 

 slight white teeth, which are placed rather within the 

 mouth, and are visible through the shell on the back ; pil-> 

 lar with four white teeth, the second from the base very 

 large : length a quarter of an inch 3 breadth more than a 

 third of its length. 



'Found- with the last, from which it differs in size, color, 

 transparency, rounded volutions, and the distinct teeth on' 

 the outer-lip which are uniform and constant, and never ap- 

 pear like tubercles. And from the next, in wanting the sub- 

 opake milk-white color, in the distinct volutions, and the 

 teeth, v. v. 



4. Volvita alba. While Volute. 



Shell oval, tapering to a rather obtuse point, milk-white, 

 semitransparent : spires five or six, quite flat and not visi- 

 bly raised, faintly striate longitudinally ; the first very.large 

 and occupying three-fourths of the shell : aperture narrow- 

 Oval, -the outer-lip thin and without teeth, pillar quite 

 smooth, sometimes a little spread, but not in the least re- 

 fleeted nor forming a perforation, with two folds near the 

 base : length about the tenth of an inch ; breadth a third 

 of its length. 



Dublin bay, and North Britain, v. v. 



5, Voluta 



