376 AMERICAN FOSSIL BRYOZOA. [bull. 173. 



Protoretepor:i (Polypora) Halliana De Koninck. See Polypora halliana 



Prout. 

 Protoretepora (Polypora) mexicana De Koninck. See Polypora mexi- 



cana Prout. 

 Protoretepora (Polypora) Shumardii De Koninck. See Polypora 



shumardi Prout. 

 Protoretepora (Polypora) hamiltoniana De Koninck. See Reteporina 



hamiltonensis (Prout). 



PROUTELLA Ulrich. Genotype: Cyclopora discoidea Prout. 

 1890. Proutella. Clrich, Geol. Sur. Illinois, VIII, pp. 403, 674. 



1889. Proutella. (Ulrich, in press), Miller, North American Geol. Pal., p. 318. 

 1897. Proutella. Simpson, Fourteenth Ann. Rep. State Geologist New York for 



the year 1894, p. 601. 



Proutella discoidea (Prout). 



I860. Cyclopora discoidea. Prout, Trans. St. Louis Acad. Sci., I, p. 578. 

 1866. Cyclopora discoidea. Prout, Geol. Sur. Illinois, II, j). 420, pi. xxi, 2, 2a, 

 pi. xxii, 10, 10«. 



1890. Proutella discoidea. Ulrich, Geol. Sur. Illinois, VIII, p. 674, pi. Ixix, 4-4d. 

 1894. Proutella discoidea. Keyes, Missouri Geol. Sur., V, i>. 37. 



1897. Proutella discoidea. Simpson, Fourteenth Ann. Rep. State Geologist New 

 York for the year 1894, ligs. 214-216 (p. 602) . 

 Keokuk: Warsaw, Hamilton, and Nauvoo, Illinois; Keokuk, Iowa. 



Pteropora Hall. See Tteniopora Nicholson. 



Pteropora duogeneris Hall. See Toeniopora exigua Nicholson. 



Ptilionella Hall. See Reptaria Rolle. 



Ptilionella conferta Hall. See Hederella conferta (Hall). 



Ptilionella nodata Hall. See Reptaria nodata (Hall). 



Ptilionella penniformis Hall. See Reptaria stolonifera Rolle. 



PTILOCELLA Simpson. Genotype: Ptilodictya parallela Hall. 



1897. Ptilocella. Simpson, Fourteenth Ann. Rep. State Geologist New York for 

 the year 1894, p. 605. 



Ptilocella parallela (Hall and Simpson). 



1887. Ptilodictya parallela. Hall and Simpson, Pal. New York, VI, p. 270, 

 pi. Ixi, 7, 8. 



1891. Ptilodictya paiallela. Hall, Tenth Ann. Rep. State Geologist New York 



for the year 1890, p. 54; Forty-fourth Ann. Rep. New York State Museum, 

 p. 84. 

 1897. Ptilocella parallela. Simpson, Fourteenth Ann. Rep. State Geologist New 

 York for the year 1894, pi. xv, 1-3. 

 Hamilton: Darien Center and near the head of Lake Canandaigua, New 

 York. 



PTILODICTYA Lonsdale. Genotype: Flustra lanceolata Lonsdale 



(GoldfussO- 



1839. Ptilodictya. Lonsdale, Murchison's Silurian System, p. 676. 



1852. Ptilodictya. McCoy, Brit. Pal. Foss., p. 45. 



1860. Ptilodictya. Eichwald, Lethjca Rossica, I, p. 387. 



1874. Ptilodictya. Nicholson, Geol. Mag., new ser., I, p. 123. 



1874. Ptilodictya. Nicholson, Pal. Province Ontario, p. 97. 



1881. Ptilodictya. Vine, Rep. Brit. Assoc. Adv. Sci., p. 164. 



