BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 495 



Eridophyllum rugosum Continued. 



Diphyphyllum rugosum Rominger, Geol. Surv. Michigan, 3, pt. 2, 1876, p. 122, 

 pi. 45, fig. 2. Lambe, Cont. Can. Pal., Geol. Surv. Canada, 4, pt. 2, 1901, 

 p. 157. 



Middle Silurian: Gotland; Louisville, Kentucky; CabotsHead, Georgian Bay, etc., 

 Ontario (Niagaran). 



Eridophyllum sentum Davis. 



Eridophyllum sentum Davis, Kentucky Fossil Corals, Geol. Surv. Kentucky, 



pt. 2, 1885, pi. 51, fig. 4; pi. 108, fig. 1. 

 Niagaran (Louisville): Louisville, Kentucky. 



ERIDOPHYLLUM VENNORI Billings. See Synaptophyllum multicaule. 

 ERIDORTHIS Foerste. See Hebertella subgenus Eridorthis. 



ERIDOTRTPA Ulrich. Genotype: E. mutabilis Ulrich. 



Batostomella (in part) Ulrich, Geol. Surv. Illinois, 8, 1890, pp. 375, 432. 



Eridotrypa Ulrich, Geol. Minnesota, 3, 1893, p. '264. Miller, N. A. Geol. Pal., 2d 

 App., 1897, p. 756. NicklesandBassler, Bull. U. S. Geol. Surv., 173, p. 32. 

 Bassler, Bull. U. S. Geol. Surv., 292, 1906, p. 29. Cumings, 32d Ann. Rep. Dep. 

 Geol. Nat. Res. Indiana, p. 745. Hennig, Archiv. fur Zool., 4, 21, p. 36. 

 Grabau and Shimer, N. A. Index Fossils, 1, 1908, p. 134. Bassler, Bull. U. 

 S. Nat. Mus., 77, p. 242. 



Eridotrypa aedilis (Eichwald). 



Cladopora aedilis Eichwald, Bull. Soc. Nat. Moscou, No. 4, 1855, p. 457; Leth. 



Rossica, 1, 1860, p. 404, pi. 24, figs. 12, 13. 

 Monticulipora aedilis Dybowski, Die Chsetetiden Ostbaltischen Silur-Formation, 



1877, p. 98, pi. 3, figs. 5, 5a. 

 Eridotrypa sediUs Bassler, Bull. U. S. Nat. Mus., 77, 1911, pp. 242, 244, pi. 4, figs. 



5, 5a; figs. 137, 138. 

 Eridotrypa mutabilis Ulrich, Geol. Minnesota, 3, 1893, p. 265, pi. 26, figs. 20-32. 



Sardeson, Jour. Geol., 9, 1901, p. 13, pi. A, fig. 11. Grabau and Shimer, 



N. A. Index Fossils, 1, 1907, p. 134, fig. 188f, 190f. 

 Middle Ordovician: Various localities in Esthonia, Russia; Goodhue, Ramsey, 



and Dakota Counties, Minnesota; Wisconsin, Tennessee, Kentucky, Ontario, 



etc. (Black River and Trenton). 

 Pkswtypes.Csit. No. 43536, U.S.N.M. Cotypes of E. mutabilis. 



Eridotrypa aedilis minor (Ulrich). 



Eridotrypa mutabilis var. minor Ulrich, Geol. Minnesota, 3, 1893, p. 266, pi. 26, 



figs. 20, 21, 29, 30. 



Eridotrypa sedilis minor Bassler, Bull. U. S. Nat. Mus., 77, 1911, p. 245, fig. 139. 

 Middle Ordovician: Cannon Falls, etc., Minnesota (Trenton-Prosser) ; Wesenberg, 



Esthonia, Russia (Wesenberg). 

 Cotypes. Cat. No. 43537, U.S.N.M. 



Eridotrypa briareus (Nicholson). 



Chaetetes briareus Nicholson, Pal. Ohio, 2, 1875, p. 202, pi. 21, 13-13b. 

 Monticulipora (Monotrypa) briareus Nicholson, Genus Monticulipora, 1881, 



p. 198, pi. 2, figs. 5-5c. 

 Monticulipora briarea James and James, Jour. Cincinnati Soc. Nat. Hist., 10, 



1888, p. 172. J. F. James, ibid., 16, 1894, p. 191. 

 Monticulipora (Chsetetes) briareus Chamberlin, Geol. Wisconsin, 1, 1883, p. 



172, fig. 



