PLATE 2, 
LYELLIA GLABRA. Niagara. 
1. Upper surface of a corallum from the white clay nine feet below the 
Niagara and Devonian passage-beds, near Louisville. Collection 
of the author. 
LYELLIA PAPILLATA. Niagara. 
2. Upper surface of a corallum from the white clay seven feet below the 
Niagara and Devonian passage-beds, near Louisville. Collection 
of the author. 
LYELLIA. PUELLA, Nova Species. Niagara. 
3. Upper surface of a weathered corallum from the limestone twelve feet 
below the Niagara and Devonian passage-beds, near Louisville. 
Collection of the author. 
