252 LIMNiEINiE. 



in that country the Limnace of more temperate regions, and 

 are characterised by the plaits on the columella, and by the 

 shells being ornamented with spots and coloured, undulated 

 markings. They are found fossil in the Miocene of Pata- 

 gonia and of the Kio Negro. 



Species of Chilina. 



ampullacea, Sow. gibbosa, Sow. 



bulimoides, Lam. major, Gray. 



bulloides, Wrb. obovata, Gould. 



Cepuelca, D'Orb. ovalis, Soiv. 



Dornbeyana, Brug. Parchapii, D'Orb. 



fasciata, Gould. Patagonica, DVrb. 



fluctuosa, Humph. pulchra, D'Orb. 



fluminea, Maton. robustior, Sow. 



fiuviatilis, Maton. tenuis, Gray. 



Genus LIMN^A, Lamarck. 



Tentacles flattened, triangular. Mantle with the front 

 edge thickened. 



Shell dextral, spiral, oblong, translucent, horn- coloured ; 

 spire acute, more or less produced, last whorl ventricose ; 

 aperture large, wide, rounded in front ; inner lip with an 

 oblique fold ; outer lip simple. 



Si/n. Limnseus, Drop. Lymnus, Montf. Limnea, 

 Flem. Lymnula, Cyclemis, Espiphylla, Lomastoma, Rajln. 



Ex. L. stagnalis, Litmaus, pi. 83, fig. 7. Shell, L. 

 stagnalis, fig. 7, a. 



The animals of this genus are found in Europe, North 

 America, China, and in most temperate countries of the 

 globe inhabiting the pouds and stagnant waters, where they 

 feed on aquatic plants and on decaying vegetable substances. 



