BIBLIOGHAPHIC LIST OF GENERA AND SPECIES. 355 



CJyrtocerah mvkick Hall and Whitlield. See Kionocerae darwini. 



Cyrtoceras nashvlllense Miller. 



Cyrtoceraa nashvillensis Miller, 17lli Ann. Rej). Dep. Geol. Nat. Res. Indiana, p. 



6!>7, pi. ]G, fisr. 1 ; adv. sheets, 1891, p. 87. 

 Niagaran (Osgood or I.aurel): West of Nashville, Tennessee. 



ryuTocKRAs NKLEu.s Hall. See Mtelonooeras neleiis. 



Cyrtoceras iiorwoodi Clarke. 



CjTtoceras norwoodi Clarke, Geol. ^Minnesota, 3, pt. 2, 1897, p. 809, pi. 60, figs. 



7-9. 

 Black River (Platteville): Rockton, Illinois. 



Cyrtocekas obscura Miller. See Cyrtoceras magister. 



Cyktoceka.s orcas Hall. See Oncoceras orcas. 



Cyrtoceras orestes Billings. 



Cyrtoceras Orestes Billings, Pal. Foss., 1, Geol. Siirv. Canada, 1865, p. 177. 

 Upper Medinan (Cataract): West Flamborough, Ontario. 



Cyrtoceras orodes Billings. See Cyclostomiceras erodes. 



Cyrtoceras planodorsatum Whitfield. See Tripteroceras planodorsatum. 



Cyrtoceras postumius Billings. 



Cyrtoceras Postumius Billings, Pal. Foss, 1, Geol. Surv. Canada, 1865, p. 178. 

 Richmond: Cape Smyth, Manitoulin Island, Lake Huron. 



Cyrtoceras pusillum Hall. 



Cyrtoceras pusillum Hall. 20th Rep. New York State Cab. Nat. Hist., 1868, p. 357; 



rev. ed., 1870, p. 407. 

 Niagaran (Racine): Racine, Wisconsin. 



Cyrtoceras 'quebecense Whiteaves. 



Cyrtoceras Quebecense Whiteavc?, Ottawa Nat., 12, 1898, p. 120; Geol. Surv. 



Canada, Pal. Foss., 3, pt. 4, 1906, p. 315, pi. 35, figs. 1, la. 

 Canadian (Levis limestone): Point Levis, Quebec. 



Cyrtoceras raei Whitfield. See Ooceras? raei. 



Cyrtoceras rectum Whitfield. 



Cyrtoceras rectum Whitfield, Ann. Rep. for 1877, 1878, p. 85; Geol. Wisconsin, 4, 



1882, p. 319, pi. 24, figs. 6, 8. 

 Niagaran (Guelph): Carlton, Wisconsin. 



Cyrtoceras regulare Billings. 



Cyrtoceras regulare Billings, Geol. Surv. Canada, Rep. Progr. for 1853-56, 1857, p. 



314. 

 Black River (Leray) : Pauquettes Rapids, Ottawa River, Canada. 



Cyrtoceras reversum Spencer. Not recognized. 



Cyrtoceras reversum Spencer, Bull. Missouri State Mus., 8, 1884, p. 60, pi. 7, 

 fig. 8; Trans. Acad. Sci. St. Louis, 4, 1884, p. 610, pi. 7, fig. 8.— Clarke and 

 Ruedemann, Mem. New York State Mus., 5, 1903, p. 96. 

 Niagaran (Lockport): Limehouse Station, Ontaiio. 

 Observation.— Cast of the living chamber probably of Poteriocerafi sauridens 

 Clarke and Ruedemann, figured in a re>'ersed position. 



