1296 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Triptoceras Miller. See Tripteroceraa Hyatt. 



TROCHOCERAS Barrande. Genotype: T. davidsoni Barrande. 



Trochoceras Barrande, Haidinger's Beriehte, Wien, 1847, p. 266; Neues Jahrb. 



Min., Geol., Pal., 1853, p. 343; ibid., 1854, p. 8.— Pictet, Traite de Pal., 2ded., 



2, 1854, p. 640.— Barrande, Neues Jahrb. Min., Geol., Pal., 1855, p. 259, pi. 3, 



fig. 18; Bull. Soc. Geol. France, 2dser., 12, 1855, p. 159, pi. 5, figs. 9, 10; Syst. 



Sil. Boheme, 2, pt. 1, 1867, p. 74— Hyatt, Proc. Amer. Phil. Soc, 32, 1894, p. 



502.— Foord, Cat. Foss. Ceph. British Mus., 2, 1891, p. 14.— Zittel, Handb. 



Pal., 2, 1885, p. 384. — Clarke and Ruedemann, Mem. New York State Mus., 5, 



1903, p. 102. 

 Sphyradoceras Hyatt, Boston Soc. Nat. Hist., 22, 1883, p. 298.— Grabau and 



Shimer, N. A. Index Fossils, 2, 1910, p. 74 (Genotype: Trochoceras clio 



Hall). 



Trochoceras Hall. See Mitroceras Hyatt. 



Trochoceras aeneas Hall. 



Trochoceras aeneas Hall, 20th Rep. New York State Cab. Nat. Hist., rev. ed., 1868, 



1870, footnote expl. of pi. 25, fig. 16. 

 Niagaran: Lyons, Iowa. 



Trochoceras Americanum Foord. See Gyroceras americanum. 



Trochoceras anderdonense Grabau. 



Trochoceras anderdonense Grabau, Michigan Geol. Surv., Geol., 1st ser., 1909, p. 



200, pi. 28, fig. 9; pi. 29, figs. 5, 6. 

 Upper Monroan (Amherstburg) : Detroit River, opposite Amherstburg, Ontario. 



Trochoceras baeri Meek and Worthen. See Gyroceras baeri. 



Trochoceras (Gyroceras) bannisteri Hall. See Gyroceras bannisteri. 



Trochoceras boreale Foord. 



Trochoceras boreale Foord, Cat. Foss. Ceph. British Mus., 2, 1891, p. 23. — Ami, 



Canadian Rec. Sci., 4, 1891, p. 399. 

 Niagaran : Wellington Channel, Arctic America. 



Trochoceras costatum (Hall). 



Trochoceras costatum Hall, Geol. Surv. Wisconsin, Rep. Prog, for 1860, 1861, p. 61; 

 Trans. Albany Inst., 4, 1863, p. 288; 20th Rep. New York State Cab. Nat. 

 Hist., 1868, p. 360, pi. 16, figs. 1, 2; rev. ed., 1870, p. 402, pi. 25, fig. 15 — 

 Chamberlin, Geol. Wisconsin, 1, 1883, p. 194, fig. — Clarke and Ruedemann, 

 Mem. New York State Mus., 5, 1903, p. 103, pi. 20, figs. 1, 2. 



Sphyradoceras costatum Grabau and Shimer, N. A. Index Fossils, 2, 1910, p. 74. 

 fig. 1287. 



Niagaran: Racine and near Milwaukee, Wisconsin (Racine); Shelby, New York 

 (Guelph). 



Trochoceras desplainense McChesney. 



Trochoceras desplainensis McChesney, Desc. New Species Fossils, 1860, p. 68 

 pis., 1865, pi. 8, fig. 2; Trans. Chicago Acad. Sci., 1, 1868, p. 52, pi. 8, fig. 1.— 

 Hall, 20th Rep. New York State Cab. Nat. Hist., 1868, p. 359, pi. 16, figs 

 8-10; rev. ed., 1870, p. 401, pi. 16, figs. 8-10.— Whiteaves, Pal. Foss., Geol 

 Surv N Canada, 3, pt. 1, 1884, p. 36, pi. 5, fig. 5.— Newell, Proc. Boston Soc 

 Nat. Hist., 23, 1888, p. 486.— Whiteaves, Pal. Foss., Geol. Surv. Canada, 3 

 pt. 2, 1895, p. 105.— Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p 

 1228, fig.— Clarke and Ruedemann, Mem. New York State Mus., 5, 1903, p 

 100, pi. 20, fig. 3-9. 



