284 



CERITHIINiE. 



Shells usually without epidermis, with the aperture more 

 or less beaked, and produced in. front. 

 Marine. 



Genus CEIUTHIUM, Adanson. 



Shell turreted, many-whorled, with indistinct varices ; 

 canal produced in front and slightly recurved; columella 

 thickened, with a callosity at the hind part. 



Syn. Anas, Klein, not Linn. Clava, Humph. Ce- 

 rites, Delameth. Camillus, Montf. 



Ex. C. vulgatum, Brugniere, pi. 29, fig. 7. Oper- 

 culum, C. vulgatum, fig. 7, «, 7, h. Shell, C. vulgatum, 

 fig. 7, c. 



Some of the species of this genus emit a bright green 

 fluid when molested. CeritJiia are found in all parts 

 of the world, in the East and West Indies, along the 

 coasts of the Pacific, the Gallapagos Islands, Australia, 

 China, and the Mediterranean. 



Species of Cerithium. 



Adansonii, Brug. 

 adustum, Kien. 

 algicola, C. B. Adams. 

 alternatum, Phil. 

 armatum, Phil. 

 atratum, Born. 

 balteatum, Phil. 

 Billeheusti, Petit. 

 breve, Qnoy and Gaim. 

 breviculura, Sow. 

 carbonarium, Phil. 

 columna, Sow. 

 corallium, Kien. 



crassilabrum, Krauss. 

 dialeucum, Phil. 

 eburneum, Brug. 

 echinatuai, Lam. 

 famelicum, C. B. Adams. 

 ferrugineum, Say. 

 fuscatum, Costa. 

 granosum, Kien. 

 heteroclites, Lam. 

 inflatum, Quoy. 

 irroratum, Gould. 

 lacteum, Kien. 

 lemuiscatum, Quoy. 



