144 PNEUMONOBRANCHIA.TA. 



(G. B. Sowerby.) Native of the south of France, 

 whence, perhaps, it was introduced. 



This species, which is found in the south of 

 France, Switzerland, and Germany, was first dis- 

 covered in England by Mr. Sowerby, in the habitat 

 indicated; but it is extremely doubtful if it had not 

 been accidentally introduced with some plant from 

 the Continent, as, after considerable inquiries, I have 

 not been able to hear of any other specimens having 

 been observed, either in the same locality or any 

 where else. Mr. Alder first added it to the British 

 list. (Mag. Zool Bot. 106.) 



It varies considerably in colour, some being nearly 

 pellucid white, and others reddish brown ; and the 

 white band is always distinctly marked, but varies 

 in width in different individuals. 



This species is very like Helix cinctella and H. 

 incarnata ; it almost appears to unite them. We have 

 received the dark variety, like that in Mr. Alder's 

 cabinet, from M. N. Boubee as H. incarnata : it does 

 not agree with Pfeiffer's, Sturm's, or other figures of 

 that species. 



29. 11. HELIX Cantiana. Kentish Snail, (f. 26.) 

 Shell slightly depressed, subglobose, brittle, 

 semitransparent, pale rosy, with an obscure 

 paler band; region of the aperture rufous- 

 brown; umbilicus small. 



Helix Cantiana. Montagu, p. 422. t. 13. f. 1. ; 

 Maton and Racket, Linn. Trans, viii. 197.; Fer. 

 Prod. 43. 



Teba Cantiana. Leach, Moll. p. 94. 



Helix Carthusiana. Drop. p. 102. t. 6. f. 33. (?) 



