380 AMEBIC AN FOSSIL BRYOZOA. [bull. 173. 



Ptilodictya nebulosa (Hall'). 



1874. Escharopora nebulosa. Hall, Twenty-sixth Ann. Rep. New York State 



Museum, p. 99. 

 1879. Escharopora nebulosa. Hall, Thirty-second Ann. Rep. New York State 



Museum, p. 162 (reprint, 1880, p. 24). 

 1883. Escharopora (Ptilodictya) nebulosa. Hall, Rep. State Geologist New York 



for the year 1882, pi. xvii, 14-16. 

 1887. Ptilodictya nebulosa. Hall and Simpson, Pal. New York, VI, p. 40, pi. 



xvii, 13-18. 

 1874. Paleschara bifoliata. Hall, Twenty-sixth Ann. Rep. New York State 



Museum, p. 107. 

 1879. Escharopora (? Paleschara) bifoliata. Hall, Thirty-second Ann. Rep. New 



York State Museum, p. 162 (reprint, 1880, p. 24) . 



1883. Paleschara ? foliata. Hall, Rep. State Geologist New York for the year 



1882, pi. xvii, 17, 18. 

 Lower Helderberg: Catskill, Clarksville, and Schoharie, New York. 



Ptilodictya nitidula Billings. See Dicranopora nitidula (Billings). 



Ptilodictya nodosa James. 



1879. Ptilodictya nodosa. James, Paleontologist, No. 3, p. 20. 



1882. Ptilodictya nodosa. Ulrich, Jour. Cincinnati Soc. Nat. Hist., IV, pi. vii, 



2, 2a. 

 1881. Ptilodictya clintonensis. James, Paleontologist, No. 5, p. 38. 



1881. Ptilodictya teres. James, Paleontologist, No. 5, p. 40. 



1890. Ptilodictya variabilis. Ulrich, Geol. Sur. Illinois, VIII, p. 304, fig. 2a, and 



fig. 6a (p. 317). 

 1889. Ptilodictya variabilis. Miller, North American Geol. Pal., figs. 505, 506 

 (p. 319). 

 Cincinnati (Richmond) : Clinton and AVarren counties, Ohio. 

 Obs. See also Ptilodictya flagellum Nicholson. 



Ptilodictya obliqua (Ringueberg). 



1884. Stictopora obliqua. Ringueberg, Proc. Acad. Nat. Sci. Philadelphia, p. 146, 



pi. ii, 2, 2a. 

 1889. Ptilodictya obliqua. Miller, North American Geol. Pal. , p. 319. 

 Clinton: Lockport, New York. 

 Obs. This species was defined and figured in such a manner that it is 



questionable whether it can be recognized. 



Ptilodictya parallela Hall and Simpson. See Ptilocella parallela (Hall 



and Simpson). 

 Ptilodictya parallela James. See Rhinidictya parallela (James). 

 Ptilodictya pavonia D'Orbigny. See Escharopora pavonia (D'Or- 



bigny). 

 Ptilodict3^a perelegans Ulrich. See Graptodictya perelegans (Ulrich). 

 Ptilodictya platyphylla James. See Phsenopora expansa Hall and 



Whitfield. 



Ptilodictya plumaria James. 



1878. Ptilodictya plumaria. James, Paleontologist, No. 1, p. 4. 



1882. Ptilodictya plumaria. Ulrich, Jour. Cincinnati Soc. Nat. Hist., V, pi. vii, 



1, Irt. 

 Cincinnati (Richmond) : Waynesville and Oxford, Ohio. 



