274 POPULAR CONCHOLOGY. 



given of the supposed size and power of these 

 mollusca by De Montford, in Buffon's Histoire 

 Naturelle, but, though exceedingly amusing, 

 their accuracy is now doubtful. Some are de- 

 scribed as large enough to draw down men-of- 

 w T ar at sea, and completely destroy them. But 

 this is an exaggeration no doubt, though there 

 are some species that grow to a very large 

 size. Mr. Swainson remarks in his Malacology 

 that he saw many caught on the shores of 

 Sicily, and that two would be a heavy load, 

 their arms being as thick as those of a man. 



ORDER V. 



HETEROPODA. 



In this tribe, the foot is formed into a kind 

 of fin, by the aid of which the animal moves; 

 there are only four genera, Carinaria, Atlanta, 

 Pterotrachea, and Phyllirbe, and of these the 

 two former alone possess shells, and need a 

 particular description. 



139. Carikaria (^Cuvier^, — Shell, conical, 

 flat at the sides, transparent, 

 and having the apex recurved. 

 Animal, body long, gelatinous, 



