PLATE LIX. 
Licpienalia vesiculata. 
Page 198. 
See Plate 57. 
Fig. 1. An enlargement, showing trilobate cell apertures. (,X 18.) 
Hamilton group. Four miles south of Le Hoy, Genesee county, N. Y. 
Fig. 14. An enlargement, showing a depressed stelliform macula, and the form and disposition of the 
adjacent cell apertures. (X 6.) 
Hamilton group. Darien, N. Y. 
Fistulipora involvens. 
Page 2-21. 
Fig. 2. An enlargement, showing the form and disposition of the cell apertures and mesopores. (X 6.) 
Hamilton group. East of Alden Station, N. Y. 
Fistulipora micropora. 
Page 229. 
See Plate 57. 
Fig. 3. An enlargement, showing the form and disposition of the cell apertures and mesopores more dis¬ 
tinctly than in fig. 20, pi. 57. (X 18.) 
Hamilton group West Hamburg, Erie county, N. F. 
Fistulipora segregata. 
Page 219. 
Fig. 4. An enlargement, showing circular cell apertures, and numerous mesopores. (X 18.) 
Hamilton group. West Hamburg, Erie county, N. Y. 
Fistulipora minuta. 
Page 223. 
Fig. 5. An enlargement, showing the form and disposition of the cell apertures and mesopores ; they are 
nearly equally prominent and so disposed that their margins give to the surface a striated 
appearance. (X 18.) 
Fig. 6. An enlargement from a slightly macerated portion of the same frond, showing the cell apertures 
much more prominent than the mesopores. (X 18.) 
Fig. 7. An enlargement from another portion of the same frond, showing some of the apertures to be sub- 
trilobate. (X 18.) 
Hamilton group. West Hamburg, Erie county, N. Y. 
Fig. 8. An enlargement from another specimen, showing elongate oval cell apertures. (X 18.) 
Hamilton group. Delphi, Onondaga county, N. Y. 
Fistulipora decipiens. 
Page 232. 
Fig. 9. An enlargement, showing the form and disposition of the cell apertures ; the lower portion of the 
figure is worn, and the apertures are larger than when the surface is well preserved. 
Hamilton group. York, Livingston county, N. Y. 
