416 THE CANADIAN NATURALIST. [Vol. X. 



several of the shells commoa to Newfoundland and Nova Scotia 

 show a larger size and better development in the more northern 

 locality. 



With the above species are the following, already described in 

 Acadian Geology, as found in the Lower Carboniferous of Nova 

 Scotia : — 



Serjmlites annulatus, Dawson. 



Conularia j^lanicostaOt, Do. 



Aviculopecten Debertianus^ Do. 



Bakevellia antiqiia, Munst. 



Cypricardia sp. 



Terehratida sacculua^ Martin. 



Sjyh'ifera glabra. 



Productiis semireticidatus, Martin. 



P. Cora, D'Orbigny. 



Streptorhynclius crenistria, Phillips. 



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