352 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Cyrtoceras eugium Hall. 



Cyrtoceras eugium Hall, Rep. Geol. Surv. Wisconsin, 1861, p. 40. Whitfield, 



Mem. Amer. Mus. Xat. Hist,, 1, pt. 2, 1895, p. GG, pi. 9, figs. 3, 4. 

 Black River (Platteville): Beloit, Wisconsin. 



CYKTOCERAS EXIUUUM Billings. See Oncoceras exiguum. 



Cyrtoceras faberi J. F. James. 



Cyrtoceras faberi James. J. F.. .l".ir. Cincinnati Sor. Xat. Hist., S, 1880, p. 2-lfi, 



pi. 4, figs. 3a, b. 

 Richmond: Waynesville, Ohio. 



CYRTOCERAS FALX Billings. See Maelonoccraa falx. 



Cyrtoceras feathers tonhaugbi Clarke. 



( 'yrtoceras featherstonhaughi Clarke. Geol. Minnesota, 3, pt, 2, 1897, p. 807, pi. 58, 



figs. 12-15. 

 Black River (Platteville): Cannon Foils. Minnesota. 



Cyrtoceras fllosum (Conrad). 



Cyrtoceras filosum (Conrad M. S.) Emmons, Xat. Hist, Xew York Geol.. 2, 



p. 392, fig. 4. Owen, Amer. Jour. Sci. Arts, 47, 1844, p. 369, fig. 4 on p. 365. 



D'Orbigny, Prodr. de Pal., 1, 1849, p. 2. Lesley, Geol. SUIT. Pennsylvania, 



Rep. P 4, 1889, p. 181, fig. 

 Cyrtolites filosum Hall, Pal. Xew York, 1, 1847, p. 190, pi. 41, figs. 3a, b. 



Emmons, Amer. Geology, 1. pt. 2, 1855, p. 167, pi. 12, fig. 4; Man. Geol., 



1860, p. 98, fig. 87. 

 Trenton: Watertown, New York. 



CYRTOCERAS FOSTERI Hall. See Cyrtorizoceras fosteri. 



CYRTOCERAS FRAGILE Billings. See Oncoceras fragile. 



' VIITOCERAS FULTONENSIS Meek and Worthen. See Cyrtorizoceras dardanum. 



CYKTOCERAS GIGANTEUM McChesney. See Nautilus?? cancellatus. 



Cyrtoceras gracile Cleland. 



Cyrtoceras sp. Cleland, Amer. Pal., 3, Bull. 13, 1000, p. 19, pi. 17. figs. ">. ''. 

 Cyrtoceras gracilis Cleland, Bull. Amer. Pal., 4, 1903, p. 13, pi. 3, fig. 11. 

 Canadian (Tribes Hill): Fort Hunter, Tribes Hill, and Canajoharie, Xew York. 



CYRTOCERAS HALLEANUS D'Orbigny. See Zitelloceras halliamim. 

 ( YUTOCEBAS HERCULES Hall. See Protophragmoceras hercules. 

 CYRTOCERAS HERTZEEI Hall and ^Tiitfield. See Hexameroceras hertzeri. 



Cyrtoceras hitzi Foerste. 



Cyrtoceras hitzi Foerste, Bull. Sci. Lab. Denison Univ.. 16, 1910, p. 78, pi. 1, 



fig. 7a, b; pi. 2, figs. 23a-c. 

 Richmond (^Tiitewater-Saluda) : Madison, Indiana. 



Cyrtoceras bought oni Clarke. 



C^Ttoceras houghtoni Clarke, Geol. Minnesota, 3, pt. 2, 1897. p. 807, pi. 59 



12-15. 

 Black River (Platteville): Cannon Falls, Minnesota. 



Cyrtoceras howardi Miller. 



Cyrtoceras howardi Miller, 18th Ann. Rep. Dep. Geol. Xat. Res. Indiana, 1894, 



p. 323, pi. 12, fig. 1; adv. sheets, 1892 ; p. 69, pi. 12, fig. 1 . 

 Xiagaran (Laurel): St. Paul, Indiana. 



