1108 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Rhinidictya minima TJlrich. 



Rhinidictya minima Ulrich, Jour. Cincinnati Soc. Nat. Hist., 12, 1890, p. 183, 



fig. 8; Geol. Minnesota, 3, 1893, p. 132, pi. 5, figs. 13-18. 

 Trenton (Prosser): Cannon Falls, Minnesota. 

 Cotypes.— Cat. No. 43709, U.S.N .M. 



Rhinidictya minima modesta Ulrich. 



Rhinidictya minima var. modesta Ulrich, Geol. Minnesota, 3, 1893, p. 133, pi. 



5, fig. 17. 

 Trenton (Prosser): Cannon Falls, Minnesota. 

 Cotypes.— Cat. No. 43610, U.S.N.M. 



Rhinidictya mutabilis (Ulrich). 



Stictopora mutabilis Ulrich (part), 14th Ann. Rep. Geol. Nat. Hist. Surv. Minne- 

 sota, 1886, p. 66.— Miller, N. A. Geol. Pal., 1889, fig. 517 (p. 324).— Ulrich, 

 Geol. Surv. Illinois, 8, 1890, figs. 2c-h (p. 304). 



Rhinidictya mutabilis Ulrich, Geol. Minnesota, 3, 1893, p. 125, pi. 6, figs. 1-6, 

 12, 13; pi. 7, figs. 10-23, 25-28; pi. 8, figs. 1-3.— Whiteaves, Pal. Foss., 3, 1897, 

 p. 240.— Sardeson, Amer. Geol., 26, 1900, p. 388, fig. 1; Jour. Geol., 9, 1901, 

 p. 155, pi. B, figs. 4-6.— Grabau and Shimer, N. A. Index Fossils, 1, 1907, p. 

 158, fig. 20SL— Bassler, Bull. U. S. Nat. Mus., 77, 1911, pp. 132, 133, fig. 56; 

 Zittel-Eastman Textb. Pal., 1913, p. 345, fig. 505a-c. 



Stictopora mutabilis var. minor Ulrich, 14th Ann. Rep. Geol. Nat. Hist. Surv. 

 Minnesota, 1886, p. 67. 



Black River (Decorah) and Trenton (Prosser): Minneapolis, etc., Minnesota; 

 Decorab, Iowa. 



Ordovician ( Wassalem) : Uxnorm, Esthonia, Russia. 



Cotypes.— Cat. No. 43812, U.S.N.M. 



Rhinidictya mutabilis major (Ulrich). . 



Stictopora mutabilis var. major Ulrich, 14th Ann. Rep. Geol. Nat. Hist. Surv. 



Minnesota, 1886, p. 66. 

 Rhinidictya mutabilis var. major Ulrich, Geol. Minnesota, 3, 1893, p. 127, pi. 



7, figs. 22, 23, 25-28, 32. 

 Black River (Decorah): St. Paul, Minneapolis, and Cannon Falls, Minnesota. 

 Cotypes.— Cat. No. 43813, U.S.N.M. 



Rhinidictya mutabilis senilis Ulrich. 



Rhinidictya mutabilis var. senilis Ulrich, Geol. Minnesota, 3, 1893, p. 127, pi. 6, 



figs. 2, 3; pi. 7, figs. 16, 17. 

 Black River (Decorah): St. Paul, Minnesota. 

 Cotypes.— Cat. No. 43814, U.S.N.M. 



Rhinidictya nashvillensis (Miller). 



Bytbopora nashvillensis Miller, Jour. Cincinnati Soc. Nat. Hist., 3, 1880, p. 143, 



pi. 4, figs. 4, 4a; N. A. Geol. Pal., 1889, fig. 462 (p. 295). 

 Rhinidictya nashvillensis Ulrich, Jour. Cincinnati Soc. Nat. Hist., 12, 1890, p. 



185.— Nickles and Bassler, Bull. U. S. Geol. Surv., 173, 1900, p. 391. 

 Stones River (Pierce): Murfreesboro, Tennessee. 



Rhinidictya neglecta Ulrich. 



Stictopora paupera (part) Ulrich, 14th Ann. Rep. Geol. Nat. Hist. Surv. 



Minnesota, 1886, p. 69. 

 Rhinidictya neglecta Ulrich, Geol. Minnesota, 3, 1893, p. 130, pi. 5, figs. 22-25. 

 Trenton: Frankfort, Boyle, and Mercer Counties, Kentucky (Wilmore); Nash- 

 ville, Tennessee; St. Paul, Minnesota. 

 Cotypes.— Cat. No. 43608, U.S.N.M. 



