234 



FUSUS. 



iHUREX COLUS. LlMl. 



Martini, A, tab. U4,fiff. 1S42, 



The genus Fusus was constituted by Bruguiere of an- 

 other division of the G. Murex of Linnaeus; in which 

 he included all the species not having thickened bands 

 on the spire, without distinguishing the genera Pyrula, 

 Fasciolaria, Pleurotoma, &c. The shells of the G. Fu- 

 sus, as it is now established, are of an elongated fusi- 

 form shape; the whorls ventricose at the lower extre- 

 mity, and without varices, or longitudinal, thickened 

 bands on the spire or body. The columella is seldom 

 plaited as in theTurbinellae and Fasciolarise; the right 

 margin exhibits no slit, as in the Pleurotomae; and the 

 long produced turreted spire distinguishes them from 

 the Pyrulae. These shells are turreted, and have a 

 transverse or nodulous keel, sometimes striated lon- 

 gitudinally ; columella plain; aperture canaliculated at 

 the base, and ending in a channelled beak, frequently 

 longer than the spiral whorls; the right side of the 

 aperture in adult shells is always dentaled or cre- 

 nulated. They arc marine shells, with a horny oper- 

 culum. 



