PLANORBIS. 



261 



foot, locomotion is very slow; when irritated, a purple fluid 

 is ejected from under the margin of the mantle. Many 

 fossil examples occur in the tertiary formations of Europe. 



Species of Planorbis. 



Bahiensis, Dkr. 

 Banaticus, Dkr. 

 Beckianus, Dkr. 

 Benguelensis, Dkr. 

 Bolivianus, Phil. 

 brunneus, Gray. 

 Cannarum, Morel. 

 Cantori, Bens. 

 capillaris, Beck. 

 Chilensis, Anton. 

 cimex, Moric. 

 coenosus, Bens. 

 Corinna, Gray. 

 corneus, Linn. 

 covnu, Ehrenb. 

 costatus, Fabr. 

 dentifer, Moric. 

 fragilis, Dkr. 

 fuscus, Dkr. 

 Gangeticus, Beck. 

 grandis, Dkr. 

 Havanensis, Pfeiff. 

 heliciformis, Both. 

 hemispherula, Bens. 

 humilis, G. B. Adams. 



labiatus, Bens. 

 Lanieriauus, D'Orb. 

 Liebmanni, Dkr. 

 lugubris, Wagn. 

 lutescens, Lam. 

 modicus, Bens. 

 montanus, D'Orb. 

 Natalensis, Dkr. 

 orientalis, Oliv. 

 peregrinus, D'Orb. 

 Pfeifferi, Dkr. 

 Provicandi, Beck. 

 refulgeus, Dkr. 

 Rossmaessleri, Schmidt. 

 rotula, Bens. 

 Riippellii, Dkr. 

 Sindicus, Bens. 

 solidus, Dkr. 

 stramiueus, Dkr. 

 Tongauensis, Quoy. 

 turaidus, Pfeiff. 

 umbilicalis, Bens. 

 vermicularis, Gould, 

 viridis, Spix. 

 zebrinus, Dkr. 



Sub-gen. planorbella, Haldeman. 



Shell with the whorls few; aperture campanulate or bell- 

 shaped, prominent. 



antrorsus, Conr. 

 campanulatus, Say. 



VOL. II. 



proboscideus, Mke. 



M M 



