Our British Snails 35 



Testacella scuhdum (a little shield). — Not so 

 common as the former species, and differing chiefly 

 in anatomy. 



Testacella Mangei. — First found at Tenerife by 

 M. Mauge. Reaches 4 inches in length. Deep 

 brown in colour. Shell larger. Rarer and more 

 western in habitat than the other species. 



Testacella halioHdea. 



Vitrina pelhicida. — The Vitrinas in several 

 ways afford a connecting link between the slugs 

 and snails, having the same tooth-formation and 

 mantle as the former, while the shell cannot 

 contain the whole body. As the name indicates, 

 the shell is like a bubble of clear greenish glass 

 and very delicate. It is small, and found in damp 

 places, coming out mostly at night. Omnivorous, 

 it is often found feeding on dead w^orms, and, 



