496 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Erldotrypa briareus Continued. 



Monotrypella briarea Ulrich, Jour. Cincinnati Soc. Nat. Hist., 5, 1882, pp. 248, 



256 (gen. ref.). 

 Eridotrypa briareus Nickles and Bassler, Bull. U. S. Geol. Surv., 173, 1900, p. 



237. Nickles, Bull. Kentucky Geol. Surv. No. 5, 1905, p. 43, pi. 1, figs. 4, 5. 

 Trenton: Covington, Kentucky. An abundant species in central Kentucky 



(Cynthiana) and central Tennessee (Bigby, Cathey). 



Erldotrypa echinata (Hall). 



Trematopora echinata Hall, 28th Ann. Rep. New York State Mus., doc. ed., 1876, 

 pi. 11, figs. 1-5; ibid., Mus. ed., 1879, p. 112, pi. 11, figs. 1-5; llth Ann. Rep., 

 Indiana Geol. Nat. Hist., 1882, p. 233, pi. 10, figs. 1-5. Lesley, Geol. Surv. 

 Pennsylvania, Rep. P 4, p. 1200, figs. 



Eridotrypa echinata Ulrich, Geol. Minnesota, 3, 1893, p. 265. 



Niagaran (Waldron): Waldron, Indiana. 



Eridotrypa exigua Ulrich. 



Eridotrypa exigua Ulrich, Geol. Minnesota, 3, 1893, p. 266, pi. 26, figs. 17-19. 



Bassler, Bull. U. S. Nat/Mus., 77, 1911, pp. 245, 246, fig. 140. 

 Trenton: Cannon Falls, Minnesota (Prosser) ; Trenton Falls, New York; Chimney 



Point, Vermont. 



Middle Ordovician (Jewe) : Near Jewe, Esthonia, Russia. 

 Cotypes. Cat. No. 43535, U.S.N.M. 



ERIDOTRYPA MUTABILIS Ulrich. See Eridotrypa sedilis. 



ERIDOTRYPA MUTABILIS var. MINOR Ulrich. See Eridotrypa sedilis minor. 



Eridotrypa nodulosa Bassler. 



Eridotrypa nodulosa Bassler, Bull. U. S. Geol. Surv., 292, 1906, p. 30, pi. 11, figs. 



14, 15; pi. 25, figs. 1-3. 



Clinton (Rochester) : Lockport and Rochester, New York. 

 Cotypes. Czt. No. 35524, U.S.N.M. 



Eridotrypa parvulipora Ulrich and Bassler. 



Eridotrypa parvulipora Ulrich and Bassler, Maryland Geol. Surv., Low. Dev., 



1913, p. 272, pi. 43, figs. 5-8; pi. 44, figs. 7, 8. 

 Helderbergian (Keyser): Keyser and Cherry Run, West Virginia; Cumberland, 



Maryland. 

 Cotypes G&t. No. 53643, U.S.N.M. 



Eridotrypa similis Bassler. 



Eridotrypa similis Bassler, Bull. U. S. Geol. Surv., 292, 1906, pp. 31, 32, pi. 12, 



figs. 10-14; pi. 26, figs. 1, 2. Grabau and Shimer, N. A. Index Fossils, 1, 



1907, p. 134. 



Clinton (Rochester): Lockport, etc., New York; Grimsby and Thorold, Ont 

 Cotypes. Cat. No. 35519, U.S.N.M. 



Eridotrypa simulatrix (Ulrich). 



Batostomella simulatrix Ulrich, Geol. Surv. Illinois, 8, 1890, p. 432, pi. 35, 



1-lg. 

 Eridotrypa simulatrix Ulrich, Geol. Minnesota, 3, 1893, p. 265. Cumings, 



Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 828, pi. 16, figs. 4, 4b; 



29, figs. 5, 5a. 

 Monticulipora simulatrix J. F. James, Jour. Cincinnati Soc. Nat. Hist., 16, 1894, 



p. 194. 

 Richmond: Clarksville, Waynesville, and other localities in Ohio; Weisberg and 



Versailles, Indiana; Savannah, Illinois; Anticosti. 

 Cotypes. Cat. No. 43744, U.S.N.M. 



