256 



Mont. p.332.Turt. D. p. 199. Somewhat conic, 

 smooth, glossy, transparent ; whorls three, the body very 

 large, variegated with white and bronze generally in 

 bands, terminating in a small obtuse point ; aperture 

 somewhat orbicular, margin acute. Minute. Whitsand 

 Bay, very rare. 



By the advice of several distinguished Conchologists, 

 I have determined on the adoption of the genus 



LACUNA. TURTON. 



Thin, conoid or somewhat globular clothed with an epi- 

 dermis. Aperture entire, roundish or oval, with the 

 lips disunited at the top. Pillar flattened, with a 

 longitudinal groove which terminates at the upper 

 end in an umbilicus . Operculum horny. 



To this genus then will belong our Rufa (L. Pute- 

 olus) (fide Turton) Natica. Pallidula, Lacuna Turbo, 

 Quadrifasciatus, Vinctus and Crassior. 



LACUNA FASCIATA Macg. Ab. p. 145. HELIX F 

 Mont. p. 446. (Adams in Lin. T. 5. t.l.f. 20, I.) 

 PHASIANELLA F Brown HI. Cone. t. 46./ 54. Sub- 

 globose, broader than long, spire depressed, of three 

 very thin transparent rapidly increasing volutions, 



