22 CONCHOLOGY. 



and slightly carinated ; peduncle long, naked, of a scarlet 

 colour. 



8. Pollicipes, Three species. 

 Easily distinguished by the numerous small valves situ- 

 ated at the base. 



Pollicipes cornucopia. Pollicipes mitella. 



P. scalpellum. 



P. cornuco'pia. The Cornucopia Pollicipes. PI. 4, fig. 6. 

 Peduncle covered with imbricated scales, the lower ones 

 rounded and turned upward. 



P. mitella. The Mitre Pollicipes. PI. 4, fig. 4. 



Valves indefinite in number, from six to twenty-four ; al- 

 most equal, and open like tulips ; colour bluish, purplish, 

 brownish, or reddish cast. 



9. Cineras. One species. 



Shell composed of five testaceous oblong valves, separate, 

 not covering the whole of the body ; two at the sides of the 

 aperture, the others on the back ; peduncle of a greenish 

 colour, with six longitudinal stripes. 



C vittata. The filleted Cineras. 

 Answers to the above description. 



10. Otion. Two species. 



Shell composed of two testaceous valves, enclosed in a 

 mantle or membranous bag, which is prolonged and termi- 

 nated in two fleshy tubes formed hke ears, one of the two 

 having a lateral opening. 



Otion Cuvierii. Otion Blainvillii. 



O. Cuvierii. Cuvier's Otion. 

 Answers to the above. 



O. Blainvilli. Blainville's Otion. 



Ash coloured ; the body and ears spotted with black. 



