PLATE 121. 
STROMBODES STRIATUS. Magara. 
1. View of the upper surface of a weathered corallum, from the ferru- 
ginous clay of the Upper Niagara, near Louisville. Collection 
of the author. 
STROMBODES PENTAGONUS. Niagara. 
2. View of the upper surface of a fragment, from the white clay of 
the Upper Niagara, near Louisville. Collection of the author. 
3. View of the upper surface of a corallum, from the red clay of the 
passage-beds between the Niagara and Devonian rocks, near 
Louisville. Collection of the author. 
STROMBODES sINEMURUS, Nov. Spec. Niagara. 
4, View of the upper surface of a corallum, from the horizon and neigh- 
borhood of S. pentagonus, Fig. 2. Collection of Mr. McConathy. 
