Note. It will be seen that some of the forms on these Plates 

 are not named. It is difficult with only a general view to do so 

 correctly, as there was neither time nor opportunity to go into every 

 detail. I have preferred leaving them thus, rather than calling them 

 by inappropriate or incorrect names. But I believe, that when com- 

 pared carefully with all previously discovered forms, both recent and 

 fossil, many will be found new. 



E 



