354 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Cyrtoceras macrostomuin Hall. 



Cyrtoceras marginalia Conrad (not Phillips, 1841), Proc. Acad. Nat. Sci. Phila- 

 delphia, 1, 1843, p. 334. Emmons, Amer. Geology, 1, pt. 2, 1855, p. 147, fig. 

 30. 



Cyrtoceras macrostomum Hall, Pal. New York, 1, 1847, p. 194, pi. 42, figs, 

 la-c, 3a-b. Clarke and Ruedemann, Bull. New York State Mus., 65, 1903, 

 p. 584. 



Black River: Mineral Point, Wisconsin (Platteville) ; Middleville, New York; 

 Carlisle, Pennsylvania. 



Cyrtoceras magister Miller. 



Cyrtoceras obscura Miller (not Barrande), Cincinnati Quart. Jour. Sci., 2, 1875, 



p. 132, text fig. 17. 



Cyrtoceras magister Miller, Cincinnati Quart. Jour. Sci., 2, 1875, p. 284. James, 

 J. F., Jour. Cincinnati Soc. Nat. Hist., 8, 1886, p. 246. Miller, N. A. Geol. 

 Pal., 1889, p. 434, fig. 729. 

 Eden (Southgate): Cincinnati, Ohio. 



Cyrtoceras manltobense Whiteaves. 



Cyrtoceras Manitobense Whiteaves, Trans. Royal Soc. Canada, 7, sec. 4, 1890, 

 p. 80, pi. 13, figs. 3-5; pi. 15, fig. 4; Pal. Foss., Geol. Surv. Canada, 3, pt. 3, 

 1897, p. 223. Schuchert, Proc. U. S. Nat. Mus., 22, 1900, p. 170. 



Oncoceras manitobense Clarke, Geol. Minnesota, 3, pt. 2, 1897, p. 799. 



Black River or Richmond: Lake Winnipeg, Manitoba; Baffin Land. 



CYRTOCERAS MARGIN ALIS Conrad. See Cyrtoceras macrostomum. 



Cyrtoceras markcei Castelnau. Not recognized. 



Cyrtoceras Markoei Castelnau, Essai Syst. Sil. I'Amerique Septent., 1843, p. 30, 



pi. 9, fig. 3. 

 Ordovician: Montmorency River, Canada. 



Cyrtoceras massiense Safford. 



Cyrtoceras Massiense Safford, Geol. Tennessee, 1869, p. 290, pi. 4 (G 3), fig. 4a, b. 

 Trenton: Nashville, Tennessee. 



Cyrtoceras mecoyi Billings. 



Cyrtoceras McCoyi Billings, Canadian Nat. Geol., 4, 1859, p. 467. 

 Chazyan: Mingan Islands, Quebec. 



CYRTOCERAS METELLUS Billings. See Mselonoceras metellus. 



Cyrtoceras microscopicum Dwight. 



Cyrtoceras microscopicum Dwight, Amer. Jour. Sci. Arts (3), 27, 1884, p. 256, pi. 7, 



fig. 11. 

 Canadian (Beekmantown) : Rochdale, New York. 



CYRTOCERAS MINNEAPOLIS Clarke. See Cyrtorizoceras minneapolis. 



Cyrtoceras missisquoi Billings. 



Orthoceras Missisquoi Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, 



" fig. 303. 



Cyrtoceras missisquoi Miller, N. A. Geol. Pal., 1889, p. 435 (gen. ref.). 

 Canadian (Beekmantown): Phillipsburg, Quebec. 



Cyrtoceras multicameratum Hall. 



Cyrtoceras multicameratum Hall, Pal. New York, 1, 1847, p. 195, pi. 42, 

 Emmons, Amer. Geology, 1, pt. 2, 1855, p. 147. 



Trenton: Middleville, New York. 



