Mollusca of Great Britain. 347 
Pine-pits at Miller's nursery near Bristol, can hardly be 
said to be thoroughly naturalized. 
Genus V. CIONELLA. SR 
Animal glutinosum. Tentacula inferiora brevissima. 
Testa oblonga seu elongata; anfractu ultimo majore. Apex 
acutiusculus. Columella subinterrupta. Apertura ca- 
naliculata, ad basin subeffusa, marginibus inæqualis- 
simis. Umbilicus nullus. 
Baron Férussac remarks, that the animals of his Styloides, 
a group of his subgenus Cochlicopa, and which answers to 
this division, do not agree in their conformation with those 
of the true Polyphemi of Montfort. This remark will, I 
believe, be found to apply equally well to the genus Acha- 
tina as established by Lamarck, besides the character which 
seems essential to that genus, of the truncature of the colu- 
mella being parallel, or nearly so, with the base of the 
shell. In the genus I have proposed, the columella is 
slightly interrupted, and forms a channel or sinus in the 
aperture; though I have not observed that it is attended 
on the part of the animal by any corresponding pecu- 
liarity. 
1. LuBRICca. 
Animal nitidum, fuscescenti-nigrum ; subtis pallidius. Ten- 
tacula inferiora vix percipienda. 
Testa oblonga, subcylindrica, diaphana, polita, nitidissima, 
. fulvo-flavescens.  Anfractus 4—6, rotundati. Apertura 
ovato-oblonga, in junioribus ad basin arcuata : peri- 
stomio sæpè incrassato, luteo, in columellam reflexius- 
culo. 
Long. 0.25.— Diam. 0.085. E 
. Helix 
