11 



AMPULLARIA URCEUS, Muller. 



SYNONYMS AND REFERENCES. 



NERITA URCEUS, MULLER. Verm., p. 174, No. 360. 

 /?. RUGOSA, LAM., vol. viii. p. 532. 

 A. URCEUS, FERUSSAC. Syst. Conch., p. 68, No. 3. 

 .#. RUGOSA, LAM. VALENC. in Humb. Rec. d'Obs. deZool. 

 etc., vol. ii. p. 258, pi. 57, fig. 2, a, 6. 



OBSERVATIONS. 



This fine species inhabits Mexico, and ap- 

 pears never to have been found in the Missis- 

 sippi as Lamarck supposes. 



(A? INTERTEXTA, Say.) 



Paludina intertexta, Say, presents much the 

 appearance of an imperforate Ampullaria. Pa- 

 ludina ponderosa, Say, which M. Deshayes sup- 

 poses may be an Ampullaria, is a true Paludina, 

 as some drawings of the mollusk sent me by 

 Mrs. Say prove. 



