PLATE IX. 



FaVOSITES EjIilONSII. 11. SJI. 



Fuvosites alveolaris (GoUlf.) Hall. Geology of N. Y. Surv. Fourth Dist., page 157, figs. 1, la. 



GoUUu>is. 

 Emmonsia heinisiilierirn KilwarJs-Haime. ut. cit., page 274. 

 Fuvosites Jtemisiikerica YanJell- Shumard, of Edwavjs-Haime. 



Turbinate lieniispheric or spreading flattened masses. 



1. Lateral view of a small specimen, showing the two kinds of cell.s very distinctly. 



2. View of a larger pyriform specimen, showing the same feature as the preceding, but less 



distinctly. 



3. A summit view of a portion of the specimen fig. 4, showing the larger cells projecting by 



the breaking away of the smaller intermediate ones. The larger cells usually have 

 stronger walls and are better preserved in the weathering. 



4. An oblique view of a specimen, showing more distinctly the projecting larger tubes. 



5. The upper side of a specimen where the cells are small and more eqnal in size. 



6. An oblique .summit view of a specimen having .smaller cells, but distinctly of two kinds. 



Figs. 1 and 2 are from specimens from Cayuga, Ontario : 3 and 4 are from near 

 Williamsville, N. Y., and the otner specimens are from the Falls of the Ohio. 



These specimens from widely separated localities, present variations in the size 

 and proportions of the cells, together with other characteristics which might be 

 noticed as evidence of distinct varieties, or perhaps of species. 



