36(5 AMEEICAN FOSSIL BRYOZO/ [bull. 173. 



Polypora nexa (Hall). 



1883. Fenestella nexa. Hall, Trans. Albany Institute, X, p. 167 (abstract, 1881, 



p. 25). 

 1883. Fenestella (Polypora) nexa. Hall, Rep. State Geologist New York for the 



year 1882, pi. xxxii, 4-9. 

 1887. Fenestella (Polypora) nexa. Hall and Simpson, Pal. New York, VI, p. 

 165, pi. xxxix, 4-9. 

 Upper Helderberg: Walpole, Ontario. 



Polypora nodocarinata Ulrich. 



1890. Polypora nodocarinata. Ulrich, Geol. Sur. Illinois, VIII, p. 601, pi. ixi, 

 9, 9a. 

 Upper Coal Measures: Crooked Creek, near Centralia, and Macoupin 

 County, Illinois. 



Polypora obliqua (Hall and Simpson). 



1879. Fenestella Arta (in part). Hall, Thirty -second Ann. Rep. New York State 



Museum, p. 163 (reprint, 1880, p. 25). 

 1883. Fenestella arta (in part). Hall, Rep. State Geologist New York for the 



year 1882, i)l. xviii, 8, 9. 



1887. Fenestella (Polypora) obliqua. Hall and Simpson, Pal. New York, VI, 



p. 64, pi. xviii, 8, 9. 



1888. Fenestella obliqua. Hall, Seventh Ann. Rep. State Geologist New York 



for the year 1887, pi. xiv, 4; Forty-first Ann. Rep. New York State 

 Museum, ipl. xiv, 4. 

 Lower Helderberg: Catskill, Greene County, New York. 



Polypora paxillata (Hall). 



1879. Fenestella i^axillata. Hall, Thirty-second Ann. Rep. New York State 



Museum, p. 164 (reprint, 1880, p. 26). 

 1883. Fenestella papillata (in error). Hall, Rep. State Geologist New York for 



the year 1882, pi. xviii, 10-12. 

 1887. Fenestella (Polypora) paxillata. Hall and Simpson, Pal. New York, VI, 

 p. 65, pi. xviii, 10-12. 

 Lower Helderberg: Clarksville, New York. 



Polypora perangulata (Hall), 



1883. Fenestella perangulata. Hall, Trans. Albany Institute, X, p. 165 



(abstract, 1881, p. 23). 

 1883. Fenestella (Polypora) perangulata. Hall, Rep. State Geologist New York 



for the year 1882, pi. xxx, 13, 14. 

 1887. Fenestella (Polypora) perangulata. Hall and Simpson, Pal. New York, 

 VI, p. 162, pi. xxxvii, 13, 14. 

 Upper Helderberg: Western New York. 



Polypora perundata Hall. See Reteporidra perundata (Hall). 



Polypora porosa (Hall). 



1883. Fenestella porosa. Hall, Trans. Albany Institute, X, p. 167 (abstract, 



1881, p. 26) . 

 1883. Fenestella (Polypora) porosa. Hall, Rep. State Geologist New York for 



the year 1882, pi. xxxi, 1-6. 

 1887. Fenestella (Polypora) porosa. Hall and Simpson, Pal. New York, VI, p. 

 163, pi. xxxviii, 1-6. 

 Upper Helderberg: Walpole, Ontario. 



