336 AMERICAN FOSSIL BRYOZOA. Ibull.173. 



Orthopora regularis (Hall)— Continued. 



1883. Trematopora regularis. Hall, Rep. State Geologist New York for the year 

 1882, pi. xxiv, 5, 6. 



1886. Orthopora regularis. Hall, Fifth Ann. Rep. State Geologist New York 



for the year 1885, pi. xxv, 27, 28. 



1887. Trematopora (Orthopora) regularis. Hall and Simpson, Pal. New York, 



VI, p. 71, pi. xxv, 27, 28, pi. xxvi, 5, (3. 

 1897. Rhombopora regularis. Simpson, Fourteenth Ann. Rep. State Geologist 



New York for the year 1894, pi. xix, 10, 11. 

 Hamilton: Falls of the Ohio. 

 Obs. The above arrangement has been given Ijecause the two forms are 



undoubtedly distinct. The Hamilton species should be compared with 



Rhombopora lineinodis Ulrich. 



Orthopora reticulata (Hall and Simpson). 



1887. Trematopora (Orthopora) reticulata. Hall and Simpson, Pal. New York, 



Vr, p. 179, pi. Iv, 9, pi. Ivi, 5. 

 1899. Rhombopora reticulata. Grabau, Bull. Buffalo Soc. Nat. Sci., VI, p. 165, 

 fig. 54. 

 Hamilton: West Hamburg, Erie County, New York. 

 Obs. Probably the same as Orthopora subquadrata. 



Orthopora rhombifera (Hall). 



1S74. Trematopora rhomljifera. Hall, Twenty-sixth Ann. Rep. New York State 



Museum, p. 103. 

 1879. Trematopora rhomlMfera. Hall, Thirty-second Ann. Rep. New York State 



Museum, p. 152 (reprint, 1880, p. 14). 

 1883. Trematopora rhombifera. Hall, Rep. State Geologist New York for the 



year 1882, pi. xi, 15-20. 

 1887. Trematopora (Orthopora) rhombifera. Hall and Simpson, Pal. New York, 



VI, p. 18, pi. xi, b5, 17-20, pi. xxiii, 11, 12. 

 Lower Helderberg: Clarksville and Schoharie, New York. 

 1883. Trematopora rhombifera. Hall, Rep. State Geologist New York for the 



year 1882, pi. xxiv, 3, 4. 



1886. Orthopora rhombifera. Hall, Fifth Ann. Rep. State Geologist New York 



for the year 1885, pi. xxv, 29. 



1887. Trematopora (Orthopora) rhombifera. Hall and Simpson, Pal. New York, 



VI, p. 71, pi. xxv, 29, pi. xxvi, 3, 4. 

 Hamilton: Falls of the Ohio. 

 Obs. The above arrangementhas been given because the two forms, though 



considered identical by Hall, are undoubtedly distinct. 



Orthopora scutulata (Hall). 



1883. Trematopora scutulata. Hall, Trans. Albany Institute, X, p. 148 (abstract, 



1881, p. 6). 

 1883. Trematopora (Orthopora) scutulata. Hall, Rep. State Geologist New 



York for the year 1882, pi. xxiv, 7, 8. 

 1887. Trematopora (Orthopora) scutulata. Hall and Simpson, Pal. New York, 

 VI, p. 70, pi. xxvi, 7, 8. 

 Upper Helderberg: AVaterville and Onondaga Valley, New York. 



Orthopora subquadrata (Hall). 



1883. Trematopora subquadrata. Hall, Trans. Allmny Institute, X, p. 181 



(abstract, 1881, p. 181). 



1884. Trematopora subquadrata. Hall, Rep. State Geologist New York for the 



year 1883, p. 11. 



