10 PALUDINA INTEGRA. 



and have less than three complete whirls. The 

 shell is more lengthened and much less ventri- 

 cose than the young of P. decisa. 



REFERENCE TO PLATE 2. 



Figs. 1 and 2 represent a very large individual, of which 

 la is the opercle. Figs. 3 and 4 are views of a more 

 characteristic specimen. Fig. 5 is the very young. 



PALUDINA INTEGRA, Say. 



PLATE 3. 



P. testa elongata, fusca vel olivacea: anfractibus quinis 

 vel senis, convexis: sutura valde impressa: apertura inte- 

 gra, postice obtusa vel rotundata. 



SYNONYMS AND REFERENCES. 

 P. INTEGRA, SAY. Jour. Acad. Nat. Sci., vol. ii. p. 174, 



DESCRIPTION. 



"SHELL olivaceous, pale, conic: whirls six, 

 wrinkled across: spire rather elongated, entire 

 at the apex: suture profoundly indented: aper- 

 ture sub-ovate, less than half the length of the 

 shell." Say. 



