350 BULLETIN \}'2, UNITED STATES NATIONAL MUSEUM. 



Cyktocekas bondi Safford. See Plectooeros boudi. 



Cyrtoceras bovlnuin Clarke and Ruedemaun. 



CjTtoceraH bo\inum Clarke and Riiedemauu, Mem. New York State Mus., .">, 



1903, p. 90, pi. 1(5, figs. 8, 0; pi. 18, figs, r,, G. 

 Xiagaran (Guelph): Rochester, New York. 



Cyrtoceras boycii Whitfield. See ('yrtactinoceras boycii. 



Cyrtoceras brevicorne Hall. See Cyclostomiceraa brevicome. 



Cyrtoceras camiirum Hall. 



Cyrtoceraa camurum Hall, Pal. New York, 1, 1847, p. 196, pi. 42, fig. 6.— Emmons, 

 Amer. Geologj', 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, figg. 5, 6. 



Mohawkian: MiddleA-ille, New York (Trenton): Beloit, \\isconsin (Black River). 



Cyrtoceras? cancellatum Hall. See Cyrtoceras eubcancellatum. 



Cyrtoceras capricornulua (Troost). Not recognized. 



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

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

 Ordo'\dcian(?): Davidson County, Tennessee. 



Cyrtoceras carrollenso Worthen. 



Cyrtoceraa Carrollensia Worthen, Geol. Surv. Illinois, 6, 1875, p. 496, pi. 23, fig. 3. 

 Trenton (Galena): Carroll County, Illinois. 



Cyrtoceras cine tu turn Foerstc. 



Cyrtoceras cinctutus Foerste, Bull. Sci. Lab. Denison Univ., 14, 1909, p. 61, pi. o, 



figa. 37a-b. 

 Niagaran (Osgood): Clifton, Tennessee. 



Cyrtoceras clintonense Foerate. 



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



figa. 2a-e. 

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



Cyrtoceras clitus Billings. 



Cyrtoceraa clitua Billinga, Cat. Sil. Foss. Auticosti, Geol. Unrw Canada, 1866, }>. 



85, fig. 24. 

 Niagaran (Lockport): Grimsby, Ontario. 



Cyrtoceras confer tisslmum ^\Tiitfield. 



CjTtoceras confortissimum Whitfield, Bull. Amer. Mus. Nat. Hist., 1, 1886, p. 



327, pi. 27, figs. 7-9.— Ruedemann, Bull, New York State Mua., 90, 1906, 



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

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



CjTtoceras conicum Owen. Not recognized. 



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



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

 Mohawkian: Wisconsin. 



Cyrtoceras oonoldale Wetherby. 



CjTtoceras conoidale Wetherby, .Tour. Cincinnati Soe. Nat. Hist., 4, 1881, p. 78, 



pi. 2, figa. 6, 6a. 

 Mayaville: Maury County, Tennessee (Leipera); Boyle and Garrard Counties, 



Konmckv. 



