79 



DIVISION VIII. Pillar lip appearing as if worn flat, aperture very wide 



and open. 



Family 1st. Armed with a subulate tooth at the base. 



Scientific name. 

 Monodon, 

 Imbricatum, 

 Crassilibrum, 



Locality. 

 So.'Seas, Cape Horn, 

 do. do. 



Scientific name. Locality. 



Narval, South Seas. 



Cingulatum, Peru. 



Rhinoceros, 



Family 2d. Without the tooth, and the outside striated. 



Persicum, 

 Sertum, 



Asiat. Ocean, Amboyna. Haustrum, 

 do. Red Sea. Vexillum, 



New Zealand. 



Patulum, 



Lateostomum, 



Ha3mastoma, 



Family Sd. With the outside tubercidated. 



E. & W. Ind., America. Armigerum, South Seas. 



South Seas, China. Dentex, 



Eu., Med. & Asiat. Seas. 



DIVISION IX. Shell with spire obliquely recurved, aperture very large, 

 outer lip reflected, and pillar lip with two obsolete teeth at the base. 



Concholepas, Peru, Magellan. 



DIVISION X. Shell coarse, spire acute, aperture ovate, pillar lip smooth 



or flattish. 



