69 





LETTER VII. 



TOSSIL SHELLS CONTINUED. CERITHIUM TROCHUS ....... SOLA- 

 RIUM TURBO MONODONTA DELPHIXULA C YCLOSTOM A.... 



SCALARIA TURRITELLA PUPA JANTHINA BULL A BU- 



LIMUS ACHATINA PHASIANELLA LYMNJEA PYR A MI- 

 DELL A MELANIA AURICULA VOLVAR1A AM PULL ARIA 



PLANORBIS HELIX HELIC1NA NERITA NAT 1C A TES- 



TACELLA....STOMATIA....CARINARIA HALIOT IS STGARETUS.... 



ARGONAUTA. 



XXXV. CERITHIUM. A turreted univalve, with an oblique opening; 

 the base terminated by a short truncated or recurved channel, and end- 

 ing upwards in a channel more or less distinct. 



This genus, so plainly marked by the oblique opening, with, as it were, 

 a reversed groove in its superior part, was formed by Bruguiere from 

 shells possessing these generic characters, and which had been retained 

 *by Linnaeus in the genera Murer, Strombus, and Trochus. 



It is well observed, by Lamarck, that, since the extreme diversity of 

 the protuberant parts on the surface of these shells, as well as the regu- 

 larity and elegance in which they are disposed, leaves hardly any pos- 

 sible form of which nature does not here show a pattern, one may be 

 permitted to say that architecture might receive from the species of 

 this, and indeed of the preceding genus, a choice of models which 

 might be well worthy of being employed for the embellishment of co- 

 lumns, &c. 



