NAU. — SOI,.] 



CEPHALOPODA. 



697 



2d Ann. Rep. Geo. Sur. Texas, pp. 334 

 to 340, Coal Meas. 

 planorbiforme, Meek & Worthen, 1860, 

 Proc. Acad. Nat. Sci. Phil., p. 469, and 

 Geo. Sur. 111., vol. 2, p. 386, (Nautilus 

 planorbif ormis,) Upper Coal Meas. 



Fig. 1256.— Metacoceras cavatiforme. 



sangarnonense, Meek & Worthen, 1860, 

 (Nautilus sangamonensis,) Proc. Acad. 

 Nat. Sci. Phil., p. 470, and Geo. Sur. 

 111., vol. 2, p. 386, Up. Coal Meas. 

 Nautilus bisulcatus, Herrick, 1888, Bull. 

 Denison Univ., vol. 3, p. 20, Wa- 

 verly Gr. 



fofbesanus, refer to Temnochilus forbes- 

 anum. 



kelloggi is from the Calciferous. 



parallelus is Beecher's species. 



planorbiformis, see Metacoceras planorbi- 

 forme. » 



quadrangular is, McChesney, should be 

 quadrangulus. It is now referred to 

 the genus Tainoceras, and is therefore 

 T. quadrangulum. 



sangamonensis, see Metacoceras sanga- 

 rnonense. 



toddi, S. A. Miller, 1892, Advance Sheets 

 18th Rep. Geo. Sur. Ind., p. 72, Up. 

 Coal Meas. 

 Oncoceras gibbosum, Whiteaves, see O. 

 whiteavesi. 



magnum, Whiteaves, 1889, Trans. Roy. 

 Soc. Can., p. 79, Trenton (?) Gr. 



whiteavesi, n. sp. Trenton (?) Gr. Pro- 

 posed instead of O. gibbosum, Whit- 

 eaves, in Trans. Roy. Soc. Can., 1889, 

 p. 80, which name was preoccupied. 

 Orthoceras brainerdi is from the Calcif- 

 erous. 



canadense, Whiteaves, 1891, (Sactoceras 

 canadense,) Trans. Roy. Soc. Can., vol. 

 9, p. 85, Trenton Gr. 



colletti, Up. Coal. Meas., O. franklinense, 

 Niagara Gr., and O. gorbyi, Hud. Riv. 

 Gr., S. A. Miller, 1892, Advance Sheets 

 18th Rep. Geo. Sur. Ind., pp. 65 to 68. 



harii, S. A. Miller, 1891, Advance Sheets 

 17th Rep. Geo. Sur. Ind., p. 87, Up. 

 Coal Meas. 



obstructum, Newell, 1888, Proc. Bost. 

 Soc. Nat. Hist., vol. 23, p. 467, Ni- 

 agara Gr. 



selkirkense, Whiteaves, 1891, Trans. Roy. 

 Soc. Can., vol. 9, p. 82, Trenton Gr. 



semiplanatum, Whiteaves, 1891, Trans. 

 Roy. Soc. Can., vol. 9, p. 81, Tren- 

 ton Gr. 



tyrrelli, Whiteaves, 1890, Trans. Roy. Soc. 

 Can., vol. 8, p. 100, Devonian. 



winnepegense, Whiteaves, 1891, Trans. 

 Roy. Soc. Can., vol. 9, p. 82, Tren- 

 ton Gr. 

 Phaeoceras, Hyatt, 1883, Proc. Bost. Soc. 

 Nat. Hist., vol. 22, p. 292. [Ety. phakoa, 

 a lentil ; keras, horn.] The characters 

 ascribed to it do not distinguish it from 

 Discitoceras. Type P. oxystomum. In 

 1891 the same author described ' P. 

 dumbli from the Coal Meas. in 2d 

 Ann. Rep. Geo. Sur. Texas, p. 347. 

 Phragmoceras missouriense, S. A. Miller, 

 1891, Advance Sheets 17th Rep. Geo. 

 Sur. Ind., p. 89, Chouteau lime- 

 stone. 

 Popanoceras, Hyatt, 1883, Proc. Bost. Soc. 

 Nat. Hist. , vol. 22, p. 337. [Ety. popanon, 

 a round, flat cake ; keras, horn.] Volu- 

 tions involute, compressed and costate, 

 or marked by furrows ; the lobes and 

 saddles are numerous and club-shaped ; 

 the ventral lobes are divided by prom- 

 inent narrow, siphonal saddles, carry- 

 ing small funnel lobes. Three or more' 

 pairs of lobes are divided by marginal 

 saddles, either single or double, the 

 terminations of the lobes being either 

 bifid or trifid. Type P. kinganum. 



walcotti, White, 1889, Am. Nat., vol. 23, 

 p. 117, and Bull. U. S. Geo. Sur., No. 

 77, p. 21, Permian Gr. 

 Poterioceras, McCoy, 1854, British Pal. 

 Foss. p. 321. [Ety. poterion, a cup; 

 keras, horn.] Shell short, fusiform ; sec- 

 tion circular ; mouth contracted ; septa 

 simple; siphon subcentral, monili- 

 form; distinguished from Gomphoce- 

 ras and allied genera by having an en- 

 tire and simple aperture. Type P. el- 

 lipticum. 



apertum and P. nobile, Whiteaves, 1889, 

 Trans. Roy. Soc. Can., vol. 8, pp. 77, 78, 

 Trenton (?) Gr. 



gracile, Whiteaves, 1891, Trans. Roy. Soc. 

 Can., vol, 9, p. 87, Trenton Gr. 



missouriense, S. A. Miller, 1892, Advance 

 Sheets 18th Rep. Geo. Sur. Ind., p. 70, 

 Chouteau limestone. 

 Ptychites cumminsi, see Waagenoceras cum- 



minsi. 

 Sactoceras canadense, see Orthoceras cana- 

 dense. 

 Solenochilus blairi, S. A. Miller, 1892, Ad- 

 vance Sheets 18th Rep. Geo. Sur. Ind., 

 p. 75, Chouteau limestone. 



newloni, Hyatt, 1891, (Asymptoceras 

 newloni,) 2d Ann. Rep. Geo. Sur. 

 Texas, p. 346, Coal Meas. 



rockfordense, S. A. Miller, 1891, Advance 



