PLATE LX—Continued. 
Stictopora subrigida. 
Page 251. 
Fig-. 21. An enlargement, showing the form and disposition of the cell apertures, and the longitudinal 
ridges. (X 6.) 
Hamilton group. Two and one-half miles east of Alden Station , N. Y. 
Stictopora CRENULATA. 
Page 252. 
Fig. 22. An enlargement, showing- the form and disposition of the cell apertures, the striations separating 
them and the crenulated margins of the frond. (X 6.) 
Hamilton group. Two and one-half miles east of Alden Station, N. Y. 
