356 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Cyrtoceras rlgidum Hall. 



Cyrtoceras ri.gidum Hall, 20tli Rep. New York State Cab. Nat. Hist., 1868, p. 358, 



fig., pi. 16 (7), figs. 3-5; rev. ed., 1870, p. 408, pi. 16, figs. S-5, text fig. 5. 

 Niagaran (Racine): Bridgeport, Illinois. 



Cyrtoceras .safifordi Miller. 



Cyrtoceras saffordi Miller, i7tli Ann. Rep. Indiana Dep. Geol. Nat. Rea., 1892, 



p. 698, pi. 17, figs. 2, 3; adv. sheets, 1891, p. 88. 

 Trenton (Catheys): Nashville, Tennessee. 



Cyrtoceras scofleldi Clarke. 



Cyrtoceras scofieldi Clarke, Geol. Minnesota, 3, pt. 2, 1897, p. 810, pi. -19, figs. 9-11. 

 Black River (Platteville) : Janesville, Wisconsin. 



Cyrtoceras septoris Hall and Whitfield. See Septameroceras septore. 



Cyrtoceras shumardi Clarke. 



Cyrtoceras shumardi Clarke, Geol. Minnesota, 3, pt. 2, 1897, p. 810, pi. 60, figs. 1-4. 

 Black River (Platte^^:lle) : Cannon Falls, Mnnesota. 



Cyrtoceras simplex Billings. 



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



p. 313. 

 Black River: "I^ot N. concession A. Nepeau," Canada. 



Cyrtoceras sinuatum Billings. 



Cyrtoceras sinuatum Billings, Geol. Surv. Rep. Progr. for 1853-56, 1857, p. 315. — 



Whiteaves, Geol. Surv. Canada, Pal. Foss., 3, pt. 4, 1906, p. 312, pi. 40, 



figs. 3, 3a. 

 Black River (Leray): La Petite Chaudi^re, Ottawa River, Canada. 



Cyrtoceras? stoneuse Safford. 



CjTtoceras? stonense Safford, Geol. Tennessee, 1869, p. 290, pi. 4 (G. 3), figs, 



2a-c. 

 Stones River (Murfreesboroj : Murfreesboro, Tennessee. 



Cyrtoceras subannulatus D'Orlngny. See Spyroccras subannulatuni. 



Cyrtoceras subarcuatum D'Orbigny. 



Cyrtoceras arcuatum Hull (not Steininger, 1830), Pal. New York, 1, 1847, p. 196, 



pi. 42, figs. 5a-c. — Emmons, Amer. Geology, 1, pt. 2, 1855, p. 147. 

 Cyrtoceras subarcuatum D'Orbigny, Prodr. de Pal., 1, 1849, p. 2. 

 Trenton: Middleville, New York. 



Cyrtoceras subcancellatum llall. 



Cyrtoceras? cancellatum Hall (preoccupied). Pal. New York, 2, 1852, p. 290, pi. 



61, figs. 2a-c. 

 Cyrtoceras subcancellatum Hall, Miller's N. A. Geol. Pal., Isted., 1877, p. 243.- — 



Grabau, Bull. New York State Mus., 45, 1901, p. 216, fig. 148; Bull. Buffalo 



Soc. Nat. Sci., 7, 1901, p. 216, fig. 148. 

 Clinton (Rochester): Niagara Falls, etc., New York. 



Cyrtoceras (Glyptoceras) subcompressum Beecher. 



CjTtoceras subcompres.sum Beecher, 5th Rep. State Geol. New York for 1885, 

 1886, pi. 14, figs. 2, 3; Pal. New York, 7, Sup., 1888, p. 35, pi. 129, figs. 2, 3.— 

 Foerete, Proc. Boston Soc. Nat. Hist., 24, 1889, p. 276, pi. 7, fig. 7. 



