257 



which are glossy and nearly smooth, the suture deep ; 

 body-whorl very large, with four white and three red- 

 dish brown bands, the central one being bioader and 

 sometimes separated into two by a pale line ; mouth 

 roundish, peristome thin and whitish : a deep and wide 

 groove from the umbilicus, margined by the slightly re- 

 flected columellar margin. Aberdeen. 



L. CANALIS Turton Zool. Jour. 3. p. 192. TURBO 

 C Mont. p. 309. t. 12. f. 11. L. VARIABILIS VAR. 

 Macff. Aber. p. 145. Conoid, opaque, pale coloured 

 without markings ; outer lip hard and thickened. 

 0,37.... 0,25. Southampton. 



LITTORINA SOWERBY. 



Ovoidal, ovate-conical or subglobose ; the spire often 

 short, often acuminated ; the whorls convex, spi- 

 rally striated, the last very ventricose ; aperture 

 elliptical, rather acute above ; pillar lip thickened 

 rather flat and generally covering the umbilicus ; 

 the outer lip thickened and bevelled to a thin edge , 

 operculum horny, spiral, consisting of few volutions, 

 increasing rapidly in width. 



L. JUGOSA. Macg. Ab. p. 326. TURBO C. Mont. t. 

 20. /. 2. Lin. Tr. 8. t. 4./. 7.- Dor. Cat. t. 19. f. 



