258 Lamarck's Genera of Shells. 



5. Fasciolaria *. 



Shell subfusiform, channelled at the base, no varices ; two 

 or three very oblique folds on the columella, near the canal. 



Distinguished from fusus by the folds on the columella, and 

 from turbinella by their oblique direction. 



Type. Fasciolaria tulipa f. (Murex tulipa. Linn.) 



Shell fusiform, ventricose in the middle, smooth, reddish 

 orange-coloured, or marbled with white and red ; brown trans- 

 verse lines at unequal distances ; whorls very convex ; sutures 

 marginally fringed ; base sulcated ; lip internally white, striated. 



Antilles. PI. VIll. Fig. 177. 8 Species. 



6. Fusus t- 



Shell fusiform, or subfusiform, channelled at the base ; ven- 

 tricose in the middle, or lower part ; no external varices ; spire 

 elevated and elongated ; no fissure or sinus in the right lip. 

 Columella smooth. Operculum horny. 



Type. Fusus colus §. (Murex colus. Linn.) 



Shell fusiform, narrow, transversely sulcated, white ; apex 

 and base red ; belly small ; whorls convex, nodular carinate in 

 the middle ; base slender, long ; lip sulcated internally, margin 

 toothed. 



Indian Ocean. PI. VIII. Fig. 178. 37 recent species, and 



13 fossil. 



7. Pyrula. 11 



Shell subpyriform, channelled at the base, ventricose at the 

 upper part ; no external varices ; spire short, sometimes flat- 

 tened, columella smooth. No fissure on the right lip. 



The pyrula differs widely from fusus, by its short spire, and 

 by the remarkable inflation of the last whorl, being always at 

 the upper part of the shell. 

 Type. Pyrula canaliculata^ (Murex canaliculatus. Linn.) 



Shell pyriform, ventricose, thin, rather smooth, palish yellow ; 

 upper part of the whorls angular, with flattened tops ; channels 

 of the sutures distinct ; angle of the upper whorls crenate ; base 

 rather long. 



Canada. PI. VIII. Fig. 179. 28 Species. 



* From fasciola, a little band. t A tulip. J A spindle. 



§ A distaff. Lamarck's third species ; his type is F. colossevs. 



11 Dim, from pyrum, a pear, ^ Channelled. 



