PLATE LVII—Continued. 
Lichenalia vesiculata. 
Page 19S. 
See Plate 59. 
Fig-. 14. A specimen, 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 variations 
in the form and disposition of the intercellular vesicles. (X 6.) 
Fig. 18. An enlargement, showing the form and disposition of the cell apertures, and a portion of one of 
the elongate depressed maculae destitute of apertures. (X 6.) 
Fig. 19. An enlargement of a transverse section, showing more distinctly the subtrilobate form of the 
cells, and the form of the intercellular vesicles. (X 9.) 
Hamilton group. York, Livingston county, N. Y. 
FlSTULIPORA MICROPORA. 
Page 220. 
See Plate 59. 
Fig. 20. An enlargement, showing the manner of growth of the frond, the form and disposition of the cell 
apertures, and interapertural pits. (X 0.) 
Hamilton group. 1 Vest Hamburg, Erie county, N. Y. 
