PLATE LVII. 



FiSTULIPORA UNILINEA. 

 Page 217. 

 Fig. 1. An enlargement of a transverse section of the cell tubes, and intercellular vesicles. (X 18.) 

 Fig:. 2. An enlai-gement of a transverse section, .showing- the form and <lisposition of the cell tubes, inter- 

 cellular vesicles and one of the sterile niaculs. (X t)-) 

 Fig. 5. An enlargement of a vertical section, showing the form and manner of growth of the cell tubes and 

 intercellular vesicles. ( X 6. ) 



Hamilton gi-oup. Near York, Livingston county, N. T. 



FiSTULIPORA 8PHEBOIDEA. 

 Page 235. 

 Fig. 3. An enlargement, showing more distinctly the charactei-8 illu.strated in fig. 4. (X 18.) 

 Fig. 4. An enlargement, showing the form and disposition of the cell apertures, and mesopores. (X B.) 

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



Ceramopora? (Lichenalia) foliacea. 



Page 23S. 

 Fig. 6. An cnlarg^ement, showing the form and disposition of the cell apertui-es, and one of the maculae 



destitute of apertures. (X fi.) 

 Fig. 7. A still farther enlargement, showing more distinctly the form of ihe cell apertui-es. (X 18.) 

 Hamilton group. Wettem New York. 



FiSTULIPORA IIEMISPIIERICA. 



Page 226. 



Pig. 8. An enlargement, showing the form and diapusition of the cell apertures, and interapertui-al pita. 



(Xii.) 

 Fig. 9. An enlargement, showing broadly oval or circular cell apertures, with sti-ong peristomes, and 



elongate interajtertural pits. (X 18.) 

 Fig. 10. An enlargement, showing subtrilobate cell apertures, and the interapertural pits obsolete on a 



large jMirtion of the sui-face. ( X 1 8. ) 

 Fig. 11. An enlargement of a vertical section, showing the form and manner of growth of the cell tubes 

 and the form ami dis|H>8ition of the intercellular vesicles. (X 6.) 

 Hamilton gi-oup. Near York, Livingston county, N. Y. 



Lichenalia bullata. 



Page 206. 

 Fig. 12. An enlargement, showing very small cell apertures and large interapertural bullte. (X 18.) 

 Fig. 13. An enlargement, showing cell apertui-es of normal size, their fonn and disposition, and the inter- 

 apertural bullie. (X 18.) 



Hamilton gi-oup. Near York, Livingxton county, N. Y. 



