350 BULLETIN !)2, UNITED STATES NATIONAL MUSEUM. 



CYRTOCERAS BONDI Safford. See Plectoceras bondi. 



Cyrtoceras bovlnum Clarke and Ruedemann. 



Cyrtoceras boviuum Clarke and Ruedemann, Mem. New York State Mu*., 5, 



1903, p. 90, pi. 16, figs. 8, 9; pi. 18. figs. 5, 6. 

 Niagaran (Guelph) : Rochester, New York. 



BOYCII Whitfield. See Cyrtactinoceras boycii. 

 < YUTOCERAS BREVICORNE Hall. See Cyclostomiceras brevicorne. 



Cyrtoceras camurum Hall. 



Cyrtoceras camurum Hall, Pal. New York, 1, 1847, p. 196, pi. 42, fig. 6. Emmoiis, 

 Amer. Geology, 1, pt, 2, 1855, p. 148. Whitfield, Geol. Wisconsin, 4, 1882, 

 p. 231, pi. 7, figs. 7, 8, 9. Clarke, Geol. Minnesota, 3, pt. 2, 1897, p. 805, pi. 

 60, figs. 5, 6. 



Mohawkian: Middleville, New York (Trenton): Beloit, Wisconsin (Black River). 



CYRTOCERAS? CANCELLATUM Hall. See Cyrtoceras subcancellatum. 



Cyrtoceras capricornulus (Troost). Not recognized. 



Conilites capricornulus Troost, 5th Geol. Rep. Tennessee, 1840, p. 50. 

 Cyrtoceras capricornulus Troost, 6th Geol. Rep. Tennessee, 1841, p. 178. 

 Ordovician(?): Davidson County, Tennessee. 



Cyrtoceras carrollense Worthen. 



Cyrtoceras CarrollensisWorthen, Geol. Surv. Illinois, 6, 1875, p. 496, pi. 23, fig. 3. 

 Trenton (Galena): Carroll County, Illinois. 



Cyrtoceras cinctutum Foerste. 



Cyrtoceras cinctutus Foerste, Bull. Sci. Lab. Deniaon Univ., 14, 1909, p. 61, pi. 3, 



figs. 37a-b. 

 Niagaran (Osgood): Clifton, Tennessee. 



Cyrtoceras cllntonense Foerste. 



Cyrtoceras Clintonense Foerste, Geol. Surv. Ohio, Pal., 7, 1893, p. 534, pi. 36, 



figs. 2a-e. 

 Upper Medinan (Brassfield): Huffmans quarry, near Dayton, Ohio. 



Cyrtoceras clltus Billings. 



Cyrtoceras clitus Billings, Cat. Sil. Foss. Anticosti, Geol. Surv. Canada, 1866, p. 



85, fig. 24. 

 Niagaran (Lockport): Grimsby, Ontario. 



Cyrtoceras confertissimum Whitfield. 



Cyrtoceras confertissimum Whitfield, Bull. Amer. Mus. Nat. Hist., 1, 1886, p. 



327, pi. 27, figs. 7-9. Ruedemann, Bull. New York State Mus., 90, 190G, 



p. 506, pi. 38, figs. 1-4. 

 Canadian (Beekmantown): Fort Cassin, Vermont; Valcour, New York. 



Cyrtoceras conicum Owen. Not recognized. 



Cyrtoceras conicum Owen, Geol. Expl. Iowa, Wisconsin, Illinois, 2d ed., 1844, 



p. 70, pi. 16, fig. 9. 

 Mohawkian: Wisconsin. 



Cyrtoceras couoldale Wetherby. 



Cyrtoceras conoidale Wetherby, Jour. Cincinnati Soc. Nat. Hist., 4, 1881, p. 78, 



pi. 2, figs. 6, 6a. 

 Maysville: Maury County, Tennessee (Leipers); Boyle and Garrard 



Kentucky. 



