BlBLlOlilUPIlIC LIST OF GENERA AJS'U SrEClES. 3G1 



Cyrtodonta Emma Billings. See Rhytimya emma. 



Cyrtodonta? fcrruginea (Flail and WTiitfield). 



Cypricai'dites ferrugineum Hall and "WTiitfield, Geol. Surv. Ohio, Pal., 2, 1875, 

 p. IIG, pi. 5. fig. 11.— Foerste, Bull. Sci. Lab. Deuison Univ., 1, 1885, p. 93. 

 Avicula whitfieldi, Foerste, Geol. Surv. Ohio, Pal., 7, 1893, p. 558, pi. 37, fig. 5. 

 Upper Medinan (Brassfield): Near Wilmington, Ohio. 

 PJastotype.— Cat. No. 46544, U.S.N.M. 



Cyrtodonta flnitima (Sardeson). 



Cypricardites finitimus Sardeson, Ihill. M-innesota Acad. Nat. Sci., 4, 1896, p. 70, 



pi. 2, fig. 6. 

 St. Peter: Highland Park, Minnesota. 



Cyrtodonta Ganth Safford. See Modiolodon ganti. 



Cyrtodonta gibbera Ulrich. 



C\Ttodonta gibbera Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 542, pi. 39, figs. 



13-15.— Schuchert, Proc. U. S. Nat. Mus., 22, 1900, p. 162, pi. 13, figs. .34, 36. 



Trenton: Thii-teen miles south of Cannon Falls, Minnesota (Prosser); Bafiin 



Land. 

 Holotype.—CAt. No. 46177, U.S.N.M. 



Cyrtodonta glabella (Ulrich). 



Cypricardites glabella Ulrich, 19th Ann. Rep. Geol. and Nat. Hist. Surv. Minne- 

 sota (March), 1892, p. 234, fig. 20. 



Cyrtodonta glabella Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 543, pi. 39, figs. 

 37, 40. 



CjTpricardites minnesotensis Sardeson, Bull. Minnesota Acad. Nat. Sci., 3 (April), 

 1892, p. 338, pi. 6, fig. 21. 



Black River: Minneapolis, Minnesota (Platteville and Decorah); Beloit, Wis- 

 consin, and Dunleith, Illinois (Platteville). 



Holotype and plesiotype.—C-At. Nos. 46178-46180, U.S.N.M. 



Cyrtodonta grandls (UMch). 



Cypricardites grandis Ulrich, Amer. Geol., 6, 1890, p. 387, figs. 19a-c. 

 Cyrtodonta grandis Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 547, pi. 40, fig. 11, 



fig. 43a-i.— Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 409, fig. 529. 

 Trenton: Between Burgin and Danville, Kentucky; Cannon Falls, Kenyon, etc., 



Minnesota; Decorah, Iowa; Oshkosh, Wisconsin. 

 Cotypes and plesiotypcs. —Cat. Nos. 46182, 46859, U.S.N.M. 



Cyrtodonta grandis germana (Ulrich). 



Cypricardites germanus Ulrich, 19th Ann. Rep. Geol. and Nat. Hist. Surv. 

 Minnesota, 1892, p. 236, fig. 22. 



Cyrtodonta grandis var. germana Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 549, 

 pi. 40, figs. 9, 10, 12, fig. 43j. 



Trenton: Between Burgin and Danville, Kentucky; Cannon Falls, etc.. Minne- 

 sota; Iowa; Wisconsin. 



Holotype and plesiotype.—CsX. Nos. 46181, 46862, U.S.N.M. 



Cyrtodonta grandis Intermedia Ulrich. 



Cyrtodonta grandis var. intermedia Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 549, 



fig. 43k^ 

 Trenton (Catheys): Haynie's Mill, central Tennessee. 

 Cotype.— Cat. No. 46183, U.S.N.M. 



