168 

 and a third, the T. Maugei of de Ferrusac, has been 

 naturalized in a garden at Bristol, but is a native of 



Teneriffe. 



Testacellus haliotideus. 



VITRINA. 



Sowerby's Genera, No. 11, plate 4. 



This mollusca, like the preceding genus, possesses a 

 shell beneath which the animal partially contracts it- 

 self. It is small, very thin, depressed, terminated above 

 by a short spire; the last whorl very large, and form- 

 ing a wide rounded or oval opening, the left edge arch- 

 ed,' and slightly bent inwards. Lamarck only men- 

 tions one species, but several others are known, and 

 two of them are natives of this country. See Sower- 

 by's description of this genus. 



Vitrina pellucida. 



