PLATE II C. ^ 



FaVOSITES HEMISPHERICA Var. RECTA. 

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Figs. 1, 2. Views of the opposite sides (posterior and anterior) of a specimen of tliis variety, 



sliowiiig tjie erect form of the lower part, aliove wliicli tlie coral expands more 



rapidly and irregularly. 

 Figs. 3, 4. Views of the opposite sides of another specimen, from the upper- part of which project 



two buds or colonies, especially shown on the left side of figure 3. Upper Helder- 



berg Limestone, Cayuga, Ontario. 



FaVOSITES HEMISPHERICA Viir. TURBIN'ATA. 



(For reference, see Explanation of Plate 2 B.) 



Fig. 5. View of tlie upper surface of a small weathered specimen, .showing the form and size of 

 the cells. From the Upper HelJerberg Limestone, Falls of the Ohio. 



