370 AMEKICAN FOSSIL BRYOZOA. [bull. 173. 



Polypora tenella Nicholson. 



1874. Polypora tenella. Nicholson, Geol. Mag., new ser., I, p. 162, pi. ix, 196. 

 1874. Polypora tenella. Nicholson, Pal. Province Ontario, p. 100, fig. 36. 

 Upper Helderberg: Wainfleet, Ontario. 



Polypora transversa Ulrich. 



1886. Polyi^ora transversa. Ulrich, Contr. American Pal., I, p. 18, pi. ii, 2, 2a. 

 Hamilton: Falls of the Ohio. 



Polypora tuberculata Prout. 



1858. Polypora tuberculata. Prout, Trans. St. Louis Acad. Sci., I, i>. 449, pi. 



xviii, 3. 



1885. Polypora tuberculata. Vine, Proc. Yorkshire Geol. Polyt. Soc, IX, p. 87. 



1890. Polypora tuberculata. Ulrich, Geol. Sur. Illinois, VIII, p. 595, pi. Ix, 8. 



1894. Polypora tuberculata. Keyes, Missouri Geol. Sur., V, p. 80. 

 Chester: Chester, Illinois; Litchfield, Kentucky. 



Polypora tuberculata Nicholson (not Prout). See Polypora arkonensis 

 Miller. 



Polypora varia (Hall). 



1888. Fenestella varia (Hall). Hall, Seventh Ann. Rep. State Geologist New 



York for the year 1887, pi. xiv, 10-12; Forty-first Ann. Rep. New York 

 State Museum, pi. xiv, 10-12. 

 Lower Helderberg: Clarksville, New York. 



Polypora varsoviensis Prout. 



1858. Polypora varsoviensis. Prout, Trans. St. Louis Acad. Sci., I, p. 237, pi. xv, 

 3-3h. 



1890. Polypora varsoviensis. Ulrich, Geol. Sur. Illinois, VIII, p. 593, pi. Ix, 2-26. 



1891. Polypora Varsouviensis (?). Whitfield, Annals New York Acad. Sci., V, 



p. 578. 

 1894. Polypora varsoviensis. Keyes, Missouri Geol. Sur., V, p. 29. 



Warsaw: Barretts Station, Missouri; Warsaw, and Monroe County, Illi- 

 nois. 



St. Louis or Chester (Maxville Limestone): Newtonville, Ohio (Whit- 

 field). 



Polypora white! Ulrich. 



1890. Polypora whitei. Ulrich, Geol. Sur. Illinois, VIII, p. 600, pi. Ixii, 2. 

 Base of Coal Measures: Seville, Illinois. 



Polypora whitei-insculpta Ulrich. 



1890. Polyix)ra whitei var. insculpta. Ulrich, Geol. Sur. Illinois, VIII, p. 600, 

 pi. Ixii, 1. 



1889. Polypora whitei var. eximia (in error for insculpta). (Ulrich, in press). 



Miller, North American Geol. Pal., p. 317. 

 Upper Coal Measures: Sj^ringfield, Illinois. 



Polypora whitei var. eximia Ulrich. See Polypora whitei-insculpta 



Ulrich. 



Polyporella Simpson. See Polypora McCoy. 



Polyporella fistulata Simpson. See Polypora listulata (Hall). 



PRASOPORA Nicholson and Etheridge, Jun. Genotype: Prasopora 

 g-rayee Nicholson and Etheridg-e, Jun. 

 1877. Prasopora. Nicholson and Etheridge, Jvm., Ann. Mag. Nat. Hist., ser. 4, 

 XX, p. 38. 



