ii-OSSIL CERlTHlUai. TURBINELLA. 83 



remarkable that Cerithium giganteicm^ a species 

 more than a foot in length, is found fossil in 

 France, and as a living species in the seas of New 

 Holland. C. telescopium is a fine shell from the 

 East Indies. C. vertagus is smooth, tawny- 

 white, with a recurved canal. It comes from the 

 Moluccas. Many species occur fossil in London 

 clay and in plastic clay : the Woolwich pits af- 

 ford specimens, and also of Turritella. 



'' Pleurotoma, formerly united with Murex^ 

 is distinguished by the singular notch in the right- 

 margin of the shell. One species, the Tower of 

 Babel, is well known, and another is common 

 under the name of Micrex java7iiis. The fossil 

 species are numerous. 



" Turhinella is taken from Murex and 

 Voluta : some species are thick, heavy shells, 

 from the Indian seas. 



" Cancellaria is an elegant genus : the shells 

 are varicose, reticulated, or cancellated ; the 

 columella has folds upon it, varying in number, 

 the right-margin sulcated within. There are se- 

 veral fossil species, which are considered very 

 beautiful. 



'' Fasciolaria trapexiufn, the Persian robe, 

 is a fine shell from the Indian seas, very common 

 in collections. 



" The genus Fusus consists of spindle-shaped 

 shells, of which Fusus colus, the distaff, will 



