876 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Oncoceras magnum Whiteaves. 



Oncoceras magnum Whiteaves, Trans. Royal Soc. Canada, 7, sec. 4, 1890, p. 79, 



pi. 15, fig. 1; Pal. Foes., Geol. Surv. Canada, 3, pt. 3, 1897, p. 220. 

 Black River or Richmond: East Selkirk, Manitoba. 



Oneoeeras magnum intermedium Whiteaves. 



Oncoceras (magnum? var.) intermedium Whiteaves, Pal. FOBS., Geol. Surv. 



Canada, 3, pt. 3, 1897, p. 221, fig. 13. 

 Black River or Richmond: Little Black Island, Lake Winnipeg, Manitoba. 



ONCOCERAS MANITOBENSE Clarke. See Cyrtoceras manitobense. 



Onaoceras minnesotense Clarke. 



Oncoceras minnesotense Clarke, Geol. Minnesota, 3, pt. 2, 1897, p. 798, pi. 58, 



figs, 16-18; fig. 10. 

 Trenton (Prosser): Hader, Stewartville, etc., Minnesota. 



ONCOCERAS MUMIAFORME Whitfield. See Clinoceras mtimiaforme. 



Oncoceras orcas (Hall). 



Cyrtoceras orcas Hall, Jlep. Sup. Geol. Surv. Wisconsin, 1862, p. 43. 



Oncoceras Orcas Chamberlin, Geol. Wisconsin, 1, 1883, p. 194, fig. Hall, 20th 

 Rep. New York State Cab. Nat. Hist., 1868 (extras, 1865), p. 350, pi. 17 (8), 

 figs. 1, 2; rev. ed., 1870, p. 410, pi. 17, figs. 1, 2. Grabau and Shimer, N. A. 

 Index Fossils, 2, 1910, p. 124, fig. 1369. 



Niagaran (Racine) : Racine and Waukesha, Wisconsin. 



Oncoceras ovoides Hall. 



Oncoceras ovoides Hall, Pal. New York, 3, 1859, p. 342, pi. 69, figs. 2a, 2b. 

 Cayugan (Manlius): Herkimer County, New York. 



Oncoceras pandion Hall. 



Oncoceras pandion Hall, Rep. Supt. Geol. Surv. Wisconsin, 1861, p. 45; ibid., 

 1862, p. 41, fig. 3. Whitfield, Geol. Wisconsin, 4, 1882, p. 233, pi. 7, fig. 6. 

 Chamberlin, Geol. Wisconsin, 1, 1883, p. 159, fig. Whitfield, Mem. Amer. 

 Mus. Nat. Hist., 1, pt. 2, 1895, p. 69, pi. 9, figs. 20-22. Clarke, Geol. Minne- 

 sota, 3, pt. 2, 1897, p. 802, pi. 58, figs. 4-6. Grabau and Shimer, N. A. Index 

 Fossils, 2, 1910, p. 123, fig. 1367. 



Black River (Platteville): Beloit and Janesville, Wisconsin; Cannon Falls, 

 Minnesota. 



Oneoeeras pettiti Billings. 



Oncoceras Pettiti Billings, Cat. Sil. FOBS. Anticosti, Geol. Surv. Canada, 1866, 



p. 86, fig. 26. 

 Niagaran (Lockport): Grimsby, Ontario. 



Oncoceras plebeium Hall. 



.Oncoceras plebeium Hall, Rep. Sup. Geol. Surv. Wisconsin, 1861, p. 44. Whit- 

 field, Mem. Amer. Mus. Nat. Hist. 1, pt. 2, 1895, p. 68, pi. 9, figs. 15-19. 

 Black River (Platteville): Beloit, Wisconsin. 



Oncoceras pristinum Ruedemann. 



Oncoceras pristinum Ruedemann, Bull. New York State Mus., 90, 1906, p. 503, 



pi. 34, figs. 1, 2. Grabau and Shimer, N. A. Index Fossils, 2, 1910, p. 122, 



fig. 1364. 

 Chazyan (Valcour): Chazy and Plattsburg, New York. 



