Paleontology. 203 



Lastly, attention may here again be directed to the 

 very instructive series of shells which has already 

 been shown in a previous chapter, and which serves 

 to illustrate the successive geological forms ofPaludina 

 from the Tertiary beds of Slavonia, as depicted by 

 Prof. Neumayr of Vienna. (Fig. i, p. 19.) 



