PLATE LVIII—Continued 
Fistulipora scrobiculata. 
Page 212. 
Fig-. 17. An enlargement, showing the form and disposition of the cell apertures and interapertural pits, 
and a portion of one of the maculae destitute of cell ■apertures. (X 6.) 
Fig. 18. A still farther enlargement, showing more distinctly the form of the cell apertures and inter¬ 
apertural pits. (X 18.) 
Hamilton group. York, Livingston county, N. Y. 
Fistulipora plana. 
Page 215. 
An enlargement, showing the form and disposition of the cell apertures ; the specimen is covered 
with a thin incrustation which obscures the interapertural pits over a portion of the surface. 
(X 6). 
A still farther enlargement, showing more distinctly the form of the cell apertures. (X 18.) 
Hamilton group. Near Canandaigua Lake, N. Y. 
Favicella inclusa. 
Page 234. 
Fig. 21. An enlargement, showing the form and disposition of the cell apertures, the angular elevations 
surrounding them, the interapertural pits, and the monticules, the centers of which are desti¬ 
tute of cell apertures. (X 6.) 
Fig. 22. A still farther enlargement, showing more distinctly the cell apertures, the surrounding eleva¬ 
tions and interapertural pits. (X 18.) 
Fig. 23. A vertical section, showing the manner of growth of the cell tubes and the intermediate vesicu- 
lose structure. (X 6 ) 
Hamilton group. York, Livingston county, N. Y. 
Fig. 19. 
Fig. 20. 
