NicKLES AND BASSI.ER.] CATALOGUE OF GENERA AND SPECIES. 363 



Polypora ? gracilis Prout. 



1860. Polypora gracilis. Prout, Trans. St. Louis Acad. Sci., I, p. 580. 



1866. Polypora gracilis. Prout, (ieol. Sur. Illinois, II, p. 422, pi. xxi, 1, la. 



1888. Polypora gracilis. Ulrich, Bull. Denison Univ., IV, p. 73. 



1890. Polypora ? gracilis. Ulrich, Geol. Sur. Illinois, VIII, p. 590, pi. Ixi, 10, 10a. 



1894. Polypora gracilis. Keyes, Missouri Geol. Sur., V, p. 28. 



Keokuk: "Warsaw and Nauvoo, Illinois; Keokuk, Iowa; Kings Mountain, 



Kentucky. 

 Waverly : Richfield and Sciotoville, Ohio. 



Polypora granilinea (Hall). 



1883. Fenestella granilinea. Hall, Trans. Albany Institute, X, ]>. 168 (abstract, 

 1881, p. 27). 



1886. Fenestella (Polypora) granilinea. Hall, Fifth Ann. Rep. State Geologist 



New York for the year 1885, pi. xl, 20-23. 



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



p. 154, pi. xl, 20-23. 

 Tapper Helderberg: Walpole, Ontario. 



Polypora halliana Prout. 



1860. Polypora Halliana. Prout, Trans. St. Louis Acad. Sci., I, ji. 580. 

 1866. Polypora Halliana. Prout, Geol. Sur. Illinois, II, p. 421, pi. xxi, 4-4h. 

 1876-7. Protoretepora ( Polypora) Halliana. De Koninck, Rech. sur les Foss. Pal. 

 de la Nouv. Galles du Sud, III, y). 179; 1898, English translation, Mem. 

 Geol. Sur. New South Wales, Pal. No. 6, p. 137. 

 1890. Polypora halliana. Ulrich, Geol. Sur. Illinois, VIII, p. 587, pi. lix, 5-5c. 

 1894. Polypora halliana. Keyes, IMissouri Geol. Sur. , V, p. 28. 



Keokuk and "Warsaw: AVarsaw, Illinois, and Keokuk, Iowa. 



Polypora Halliana Nicholson (not Prout) = ? 



1874. Polypora Halliana. Nicholson, Pal. Province Ontario, j). 99. 

 Upper Helderberg: "Wainfleet, Ontario. 



Polypora Hamiltonensis Prout. See Reteporina hamiltonensis (Prout). 



Polypora hexagonalis (Hall). 



1883. Fenestella hexagonalis. Hall, Trans. Albany Iiistitute, X, p. 109 (abstract, 



1881, p. 27). 

 1883. Fenestella (Polypora) hexagonalis. Hall, Rep. State geologist New York 



for the year 1882, pi. xxxi, 14-20. 

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

 VI, p. 164, pi. xxxiii, 14-20. 

 Upper Helderberg: Walpole, Ontario. 



Polypora hexagonalis-foraminulosa (Hall). 



1883. Fenestella hexagonalis var. foraminulosa. Hall, Trans. Albany Institute, 



X, p. 169 (abstract, 1881, p. 27). 

 1883. Fenestella (Polypora) hexagonalis var. foraminulosa. Hall, Rep. State 



Geologist New York for the year 1882, pi. xxxii, 16-20. 

 1887. Fenestella (Polypora) hexagonalis var. foraminulosa. Hall and Simpson, 



Pal. New York, VI, p. 165, pi. xxxix, 16-20. 

 Upper Helderberg: Walpole, Ontario. 



Polypora idothea (Hall). 



1874. Polypora elegans (?). Hall, Twenty-sixth Ann. Rep. New York State 



Museum, p. 97. 

 1879. Fenestella Idothea. Hall, Thirty-second Aim. Rep. New York State 

 Museum, p. 166 (reprint, 1880, p. 28). 



