GASTEROPODA. 



215 



low water to 10 or 20 fathoms ; one minute species has been 



dxedged at 50 fathoms. 



Fig. 79. One of the buccal pla es of Triton, ^ (Wilton.) 



Fossil, 45 species. Eocene — . Britain, France, &c. Chili. 



The great triton {T. tritonis) is the conch b'own by the 

 Australian and Polynesian Islandei s. A yery similar species 

 {T. nodiferus) is found in the Medi.erranean, and a t-i rd in the 



Fig. 80. Teeth of Trito) 



("Wilton.) 



"West Indies. The buccal plates and teeth of Triton are shown 

 in Figs. 79, 80. 



Fasciolaria, Lam. 



Etymology f fasciola, a band. 



Type, F. tulipa. PI. Y., Fig. 1. 



Shell fusiform, elongated ; whorls 

 round or angular ; canal open ; 

 columellar lip tortuous, with several 

 oblique folds. Operculum claw- 

 shaped. F. gigantea of the South 

 Seas attains a length of nearly two 

 feet. The teeth of Fasciolaria re- 

 semble those of Fusua Islandicus. 

 median tooth has five, or rarely six denticles ; and Mr. Wiltou 



Fig. 81. 



Fasciohiria Tarentina, 

 (Wilton.) 



In Buccinum undatum, the 



