150 POPULAR BRITISH CONCHOLOGY. 



B. costulata : with the ridges thicker, less obHque, but an- 



gulated. 

 ^. rufilahnim. 



R. abyssicola : beautifully cancellated. 

 B. calathus : the same, but with a crenulated outer Hp, and 



more produced spire. 

 B. rubra : smooth, pyramidal, of a reddish-brown colour. 

 B. costata : with beautifully-carved oblique ridges, and a 



sliglit keel. 

 B. striata : spirally striated, and puckered at the suture. 

 B. crenulata : broadly cancellated. 

 B. lactea : upper part of whorls decussated, lower part 



spirally ribbed. 

 B. Beanii : decussated, with a thickened, crenulated outer 



Up- 



B. striatula : with sharp spiral keels, and intermediate sculp- 

 ture. 

 B. cingillus : banded with reddish-brown. 

 j^. ZetlancUca : cross-barred coarsely. 

 B. rubra : smooth, with a broad red band. 

 B. semistriata : striated, prettily coloured with flames. 

 B. sculpta : finely cross-barred. 

 B. jjunctura : striated both ways, coloured with flames. 



