GA.STEROPODA. 



21. 



low "water to 10 or 20 fathoms ; one minute species has beer, 

 dredged at 50 fathoms. 



Fig. 79. Oue of the buccal plfi'es of Triton, -M- ("Wilton.) 



T" 



FcssU, 45 species. Eocene — . Britain, France, &c. Cliili. 



The great triton {T. tritonis) is the conch lilown by tho 

 Australian and Polynesian Islanders. A very similar species 

 {T. nodiferus) is found in the Mediterranean, and a third in tho 



Fig. 80. Teeth of Trltop, Si^Q-. ("\Vilton.) 



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

 in Figs. 79, 80. 



Fasciolahia, Lam. 



Etymology J fasciola, a band. 



Type, F. tuHpa. PL V., Fig. 1. 



Shell fusiform, elongated ; "whorls 

 round or angular ; canal open ; 

 columellar lip tortuous, "with several 

 oblique folds. Operculum cla"w- 

 shaped. F. gigantea of the South 

 Seas attains a length of nearly t"wo 

 feet. The teeth of Fasciolaria re- 

 semble those of Fusus Islandicus. 



Fig. 81. Fasciolaria Tarentina. 

 ("Wilton.) 



In Buccinum undatum, the 



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



