PLATE LVn— Continued. 



LrOHENALIA VE8ICULATA. 



Page 19S. 



See Plate 59. 



Fig. 14. A sjiecimen, natural size, showing- the manner of growth upon a Cyathophylloid coral. 



Figs. 15-17. Enlargements of vertical sections from different portions of the same frond, showing vanations 



in the form and disposition of the intei-celhilar vesicles. (X 6.) 

 Fig. 18. An enlargement, showing the form and disposition of the cell ajiertures, and a portion of one of 



the elongate depressed maculs destitute of apertures. (X (J.) 

 Fig. 19. An enlargement of a transvei-se section, showing more distinctly the subtrilobate foi-m of the 

 cells, and the form of the intercellular vesicles. (X 6.) 



Hamilton group. York, Livingston county, N. Y. 



FiSTULIPOKA MICROPORA. 



Page 220. 



See Plate 59. 



Fig. 20. An enlargement, showing the manner of growth of the frond, the form and disjKwition of the eel! 



apertures, and interapertural pits. (X 0-) 



Hamilton group. Wtst Hamburg, Erie county, N. Y. 



