PALUDINA GENICULA. 15 



rait aussi bien placer cette coquille parmi les 

 Ampullaires que parmi les Paludines, son ou- 

 verture se trouvant plus allongee et plus etroite 

 que dans la plupart des especes de ce dernier 

 genre." — Deshayes. I regret that I am unable 

 to give a figure, or at least a description of 

 the animal, of this fine species. 



Reference to Plate 4. 



The inferior surface of two shells, an opercle, and the 

 very young are represented. The specimens figured are 

 not of the largest size. 



PALUDINA GENICULA, Conrad. 



Plate 5. 



P. testa subovalis, spirit elongata: anfractibus quaternis 

 scalariformis, postice angulatis. 



SYNONYMS AND REFERENCES. 

 P. genicula, Con. N. F. w. Shells, p. 48, pi. 8, fig. 3. 



DESCRIPTION. 



Shell suboval, composed of four scalariform 

 whirls, which are angulated posteriorly: spire 



