Class VI. 



VOLUTA. VOLUTE. 



26 



■ 



- Mont. Test. Br. Sup. gg. , 



12. TRIPLI- 



CATA. 



* V. with a smooth ovate shell ; chesnut brown ; 

 six volutions, first very large ; aperture narrow ; 

 pillar with three plaits; length scarcely half 

 an inch. - ' 



Mont. Test. Br. Sup. 100. 13, bideu- 



TATA. 



* V. with a sti'ong conic white glossy shell, of 

 six or seven volutions; pillar furnished with 

 plaits like teeth ; length a quarter of an inch. 



Found near DiDihar, and on the DevomJiire 

 coast. 



Mont. Test. Br. Sup. 101. 14. hyali- 



NA. 



* V. with a smooth pellucid shell ; six flat vo- 

 lutions and obtuse apex. 



Shell bank near Dunbar. 



Mont. Test. Br. Sup. 102. J3_ bulla- 



OIDES. 



* V. with a pale ovate horn-colored shell, hav- 

 ing eleven or twelve flat subimbricated volu- 

 tions ; aperture contracted, with one strong 

 spiral ridge on the columella, which is extended 

 into a canal ; length three eighths of an inch. 

 In Mr. Laskeys cabinet. 



