PLATE LIX. 



LiCHENAMA VESICULATA. 

 Page 198. 

 See Plate 57. 

 Fig. 1. An enlargement, showing trilobate cell apertures. (X 18.) 



Hamilton group. Miiir miles south of Le Hoy, ffenesee county, N. T. 

 Fig. 14. An enlargement, showing a depressed stelliform macula, and the form and disposition of the 

 adjacent cell apertui-es. (X 6.) 



Uamiltou group. Darien, N. Y. 



FiSTUUPORA INVOLVEN8. 

 Page 2.'1. 

 Pig. 2. An enlargement, showing the form and disposition of the cell apertures and mesopores. (X 6.) 

 Hamilton group. Jiwit of Aldea Station, iV. Y. 



FlSTULIPOKA MICKOPORA. 

 Page2'JU. 

 See Plate 57. 

 Fig. 3. An enlargement, showing the form and di.sposition of the cell apertures and mesopores more dis- 

 tinctly than in fig. 20. pi. 57. (X 18.) 



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



FiSTULIPORA SEGREGATA. 

 Page il». 

 Kg. 4. An enlargement, showing circular cell a|>erture8, and numerous mesopores. (X 18.) 

 Hamilton gi-oup. Wext Hamlxu-g, Erie ruunty, N. Y. 



FlSTULII'OUA .MIXUTA. 



Page ii$. 



Pig. 5. An enlargement, showing the foi-m and disiMwilion of the cell apertures and mesopores ; they are 



nearly eijually pn>minent and so disposed that their margins give to the surface a striated 



ai)i>earance. (X 18.) 



Fig. 6. An enlargement from a slightly macerated portion of the same frond, showing the cell apertures 



much more prominent than the mesopoi-es. (X 18.) 

 Kig. 7. An enlargement from another jxtrtion of the same fi-ond, showing some of the ai>ertures to be sub- 

 trilobate. (X 18.) 



Hamilton group. IVeM Hamlmrg, Erie county, JV. Y. 

 Fig. 8. An enlargement from another si>eciraen, showing elongate oval cell apertures. (X 18.) 

 Hamilton group. JJelp/ii, Onondaga county, N. Y. 



FlSTULIPOKA DECIPIEN8. 

 Page 232. 

 Fig. 9. An enlargement, showing the form an<l disjiosition of the cell apertures ; the lowei' ijortion of the 

 figure is worn, and the ai>ertures are larger than when the surface is well pi-eserved. 

 Hamilton groui). Yirrk, Lieingxtim county, N. Y. 



