11 



30. Ampullaria (Pomus) crassa. 



Ampullaria crassa, Swainson, Zool. III. I, Vol. Ill, 1822, Loc. ? ; Reeve, 

 fig. 5, Brazil. 



1 Ecuador ; ex c. Dr. H. Dohrn. 



Agrees with Reeve's fig. 5, only a little smaller and colu- 

 mella less straight. 



var. oblonga. 

 Near Reeve's fig. 106, as " A. crassa, oblong convoluted var." 



1 Brazil; ex c. Prof. W. Newcomb (sent as " A. spixi"). 

 4 Amazon Rv. j ex c. Prof. W. Newcomb (as "A. nubila"). 



Alt. 22J, diam. 19f mil. Imperforate, intermediate between 

 Reeve's figs. 5 and 106 as regards convexity of the whorls and 

 height of the spire. I cannot detect the slightest difference 

 between Dr. Newcomb's specimens, and I believe they must 

 have come from one locality ; they do not in the least resemble 

 A. nubila or A. spixi ! 



31. Ampullaria (Pomus) platse. 



An>pullaria Plata?, Maton, Trans. Lin. Soc., 1809, R. Plata ;=A. naticoides, 

 Orb. 1835 ; sect. Asolene. 



1 Rio Plata ; ex c. A. Morelet, Esq. 



32. Ampullaria (Pomus) pulchella. 



Ampullaria pulchella, Anton, Verz. Conch. 1839, [sine Hab.] ;=A. 

 roissyi, Orb. 1839. 



3 Rio Plata; ex c. A. Morelet, Esq. 



2 Rio Plata ; ex c. Dr. H. Dohrn (as " A. platce "). 



33. Ampullaria (Pomus) elegans. 



Ampullaria elegans, d'Orbigny, Voy. Amer. Merid., 1839, Bolivia, fyc.;= 

 A. peristomata, Orb. 1835. 



4 Bolivia ; ex c. G. Nevill, Esq. 

 The above are all decollated. 



1 Brazil ; ex c . Prof. W. Newcomb (as " A. spixii "). 



