154 SPECIFIC 



is wide and not contracted at its entrance to the 

 aperture, the latter gradually, and not, as in a true 

 Murex, suddenly ojDening into the beak ; the outer 

 lip is nearly straight, and not compressed towards 

 the columella at the lower part of the body. This 

 shell cannot therefore be considered as belonging 

 to Murex, or any other than the genus Bulla, — no 

 other, besides these two, possessing an elongated 

 straight beak. 



Fig. 7. B. Ampulla, 



Shell rounded, opaque ; vertex umbilicate. 



Lister Conch, tab. 713. fig. 69. 



Specimen pale reddish brown, mottled with ci- 

 nereous spots^ and marked with two darker bands; 

 columella covered with the inner lip, white. 



Inhabits all seas. 



The variety to which the figured specimen be- 

 longs differs uniformly from that which is without 

 bands, in having the outer lip rounder and more 

 expanded. 



Fig. 8. B. Terehellum, 



Shell cylindrical; spire subulate; base truncate, 



Luier Conch, tab. 736. fig. 30, 31. 



