LIMNEA. 



Lam. — Hist. Nat. des Anim. sans vert. T. 6. pt. ^. p. 157. 



TESTA oblonga turrita^ interdum elongata ; spird 

 semper exserta. Apertura integra^ longitudinalis. 

 Labium externum acutum^ inferne ad smistrum 

 revertens^ et in plicam columellarem aseendens. 

 Labium internum plus minusve dilatatum. 



Again we are obliged to express our dissent from the 

 opinion of Lamarck, who has put at the head of the species 

 of his own Genus Limneay the Helix Columna of Gmel., 

 &c. calling it Limnea Columnaris^ although it is sufficiently 

 distinguished from all the Limneae by its peculiar charac- 

 ters, which, indeed, bring it much nearer to Achatina ; 

 wherefore, we think De Ferussac has arranged it in a much 

 more natural situation after the Achatina, though, at the 

 same time, he expresses some doubt about the propriety of 

 placing it there, on account of his being unacquainted with 

 its animal ; indeed we are not surprized at this, for the 

 shell is so singular, that, without a knowledge of its 

 animal, we cannot hope to arrive at certainty in placing it. 

 It is however a land shell, there can therefore be no 

 doubt but that the animal differs essentially from that of 

 Limnea. 



The Genus Limnea was established by Lamarck, hav- 

 ing been previously included by Bruguiere with his Bulimi^ 

 and by Linne and Linnaeans in Helix; if we except the 

 shell we have mentioned above, it appears to us to be a very 

 natural Genus. 



The Limneae are of an oblong geileral form, their 

 spire is always apparent, and sometimes elongated and 



