204 PALEONTOLOGY. , 



of Septocaedia. These shells have the general aspect externally of the 

 genus Cardita, and resemble very cosely the forms of that genus peculiar to 

 the Eocene formations. Since, however, they prove to be a new generic 

 type, they cannot be said to possess the same stratigraphical importance as 

 one already known to be peculiar to any definite horizon, and they may 

 be only the first appearance of what afterward becomes a common feature 

 of a group, characterizing a later period. Several fragments of additional 

 species, all apparently new to science, occur in the collections from this 

 locality, but all in too imperfect a condition to be serviceable. 



Among the collections are many small groups of species from various 

 localities, which would have been of great interest, and highly advantageous 

 to science, could they have been illustrated, but the limited time and means 

 at our disposal would not permit. 



