518 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



EURYDICTYA Ulrich. Genotype: E. montifera Ulrich. 



Eurydicta Ulrich, Geol. Surv. Illinois, 8, 1890, pp. 389, 520. (Ulrich in press), 

 Miller, N. A. Geol. Pal., 1889, p. 301. Ulrich, Geol. Minnesota, 3, 1893, p. 

 138. Pocta, Syst. Sil. Centre Boheme, 8, pt. 1, 1894, p. 17. Simpson, 14th 

 Ann. Rep. State Geol. New York for 1894, 1897, p. 527. Nickles and Bassler, 

 Bull. U. S. Geol. Surv., 173, 1900, p. 48. 



Eurydictya calhounensls Ulrich. 



Eurydictya calhounensis Ulrich, Geol. Surv. Illinois, 8, 1890, p. 520, pi. 30, 



figs. 4-4c. 

 Black River (Kimmswick) : Three miles north of Cap au Gres, Calhoun County, 



Illinois. 

 Sections of holotype.C&t. No. 43754, U.S.N.M. 



Eurydictya montifera Ulrich. 



Eurydictya montifera Ulrich, Geol. Surv. Illinois, 8, 1890, p. 521, pi. 30, 



figs. 3-3d. Simpson, 14th Ann. Rep. State Geol. New York for 1894, 1897, 



figs. 80-82 (p. 528). 



Richmond (Fernvale) : Wilmington, Illinois. 

 Fragment of holotype. Cat. No. 43753, U.S.N.M. 



Eurydictya multipora (Hall). 



Phsenopora multipora Hall, Foster and Whitney 's Rep. Geol. Lake Superior Land 

 District, pt. 2, 1851, p. 206, pi. 24, figs, la, b. Ulrich, Jour. Cincinnati Soc. 

 Nat. Hist., 5, 1882, p. 171, pi. 8, figs. 7-7b. 



Eurydictya multipora Ulrich, Geol. Surv. Illinois, 8, 1890, p. 520; Geol. Minne- 

 sota, 3, 1893, p. 139, pi. 6, 9-11; pi. 14, 9-11 (not pi. 7, 24, 29-31=Rhinidictya 

 fidelis Ulrich). Nickles and Bassler, U. S. Geol. Surv., 173, 1900, p. 241. 

 Bassler, Proc. U. S. Nat. Mus., 30, 1906, p. 38, pi. 1, figs. 11, 12. 



Ptilodictya antiqua James, Paleontologist, 5, 1881, p. 37. 



Black River and Trenton: Escanaba River, Michigan; Burgin, Kentucky; Nash- 

 ville, Tennessee; St. Paul, Minnesota. 



Plesiotypes. Cat. No. 43604, U.S.N.M. 



EURYDICTYA MULTIPORA (in part) Ulrich. See Rhinidictya fidelis. 



Eurydictya sterlingensis Ulrich. 



Eurydictya sterlingensis Ulrich, Geol. Surv. Illinois, 8, 1890, p. 522, pi. 30, 



figs. 2, 2a. 

 Richmond (Maquoketa): Sterling and South Elgin, Illinois. 



EURTMTA Ulrich. Genotype: Modiolopsis plana Hall. 



Eurymya Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 512. Sardeson, Amer. Geol., 

 30, 1902, p. 39. Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 517. 



Eurymya alata (Ulrich). 



Modiolopsis alata Ulrich, Amer. Geol., 5, 5, 1890, p. 280, figs. 8a-c. 

 Eurymya alata Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 512 (gen. ref.). 

 Maysville (Fairmount): Cincinnati, Ohio, and vicinity. 

 Cotypes.G&t. No. 46201, U.S.N.M. 



Eurymya plana (Hall). 



Modiolopsis plana Hall, Rep. Supt. Geol. Surv. Wisconsin, 1861, p. 30; Geol 

 Wisconsin, 1, 1862, pp. 38 and 438, fig. 6. Chamberlin, Geol. Wisconsin, 1, 

 1883, p. 156, fig. Ulrich, 19th Ann. Rep. Geol. Nat. Hist. Surv. Minnesota, 

 1892, p. 224, fig. Whitfield, Mem. Amer. Mus. Nat. Hist., 1, pt. 2, 1895, p. 

 pi. 7, figs. 12, 13 (?14, 15). Sardeson, Amer. Geol., 30, 1902, p. 40, figs. 1 



