240 HELICIDJE. 



noticed elsewhere in this country. It is the Bulimus 

 clavulus of Turton. 



The B. decollatus was recorded by Dr. Turton as 

 having been once found living in a greenhouse at Wat- 

 ton in the South of Devon, where it was observed to 

 breed for many years in succession ; but, in consequence 

 of some alterations being made in the greenhouse, the 

 colony was destroyed and became extinct. It is common 

 in the South of Europe, as well as on the opposite shores 

 of the Mediterranean ; but its most northern locality 

 appears to be Agen, in the Department of Lot-et- 

 Garonne. 



Genus VI. PUTA*, Lamarck. PL VII. f. 3, 4, 5. 



BODY slender, but generally short, always containable 

 within the shell : tentacles 4, short, especially the lower ones : 

 foot narrow. 



SHELL cylindrical, not very thin or glossy : whorls com- 

 pact, the last not broader, or very little more so, than the 

 penultimate or preceding one : spire long : mouth horseshoe- 

 shaped or semilunar, mostly furnished with one or more teeth; 

 sometimes there are also spiral plates and incomplete septa 

 in the interior : umbilicus oblique, very small, and con- 

 tracted by an upward twist of the last whorl at its base. 



The Pupce are all of a small size and gregarious. They 

 live in moss or in the crevices of rocks and walls, as well 

 as on exposed hill-sides under stones or at the roots of 

 grass. They are vegetable feeders, and appear to live 

 on small plants, Cryptogamia, and decaying leaves. 

 Some species are ovoviviparous. The mouth is parallel 

 to the columella or axis of the shell ; and this, combined 

 with the last whorl being of nearly the same breadth 

 as the preceding one, causes the shell to assume some- 



* Like the chrysalis of an insect. 



