172 



CEPHALOPODA. 



jason, Billings, 1859, Can. Nat. & Geol., 

 vol. 4, Chazy Gr. [Ety. mythological 

 name.] 

 lasellensis. Meek & Worthen, 1866, Proc. 

 Acad. Nat. Sci., Phil., Up. Coal Meas. 

 [Ety. proper name.] 

 latus, see Temnocheilus latum, 

 lawsi. Swallow, 1860, Trans. St. Louis 

 Acad. Sci., Ham. Gr. [Ety. proper 

 name.] 

 leidyi, see Solenocheilus leidyi. 

 marcellensis, Vanuxem, 1842, i Goniatites 

 marcellensis) Geo. Rep. N. Y., Ham. 

 Gr. [Ety. proper name.] 

 maximus, Conrad, 1838, (Cyrtoceras max- 

 imus) Ann. Rep. N. Y., Ham. Gr. 

 [Sig. the largest.] 

 meekanus, see Trematodiscus meekanus. 

 missouriensis. Swallow, 1858, Trans. St. 

 Louis Acad. Sci., Coal Meas. [Ety. 

 proper name.] 

 natator, Billings, 1859, Can. Nat. & Geo., 

 vol. 4, Chazy Gr. [Sig. a swimmer.] 

 niot€7isis, see Temnocheilus niotense. 

 nodocarinatus, McChesney, syn. for N. 



occidentalis. 

 nodoso-dorsatus, Shumard, 1858, Trans. 

 St. Louis Acad. Sci., Coal Meas. [Ety. 

 Tiodosm, knotty; dorsatus, high-backed.] 

 occidentalis, Swallow, 1858, Trans. St. 

 Louis Acad. Sci., Permian Gr. [Sig. 

 western.] 

 occidentalis, Hall, 1860, 20th Reg. Rep., 

 Niagara Gr. This name being preoc- 

 cupied, McChesney's name, cancellatus, 

 has precedence. See Lituites cancel- 

 latus. 

 oriens. Hall, 1876, lUust. Devonian Foss., 



Marcellus shale. [Sig. the east.] 

 omatus, UaU, 1860, 13th Reg. Rep. See 



Discites ornatus. 

 permianus. Swallow, 1858, Trans. St. 

 Louis Acad. Sci., Permian Gr. [Ety. 

 proper name.] 

 planidorsaliSy see Trematodiscus planidor- 



salis. 

 planorbiformis, Meek & Worthen, 1860, 

 Proc. Acad. Nat. Sci. Phil., Coal Meas. 

 [Sig. shaped like a shell of the genus 

 Flanorbis.] 

 planovolvis, Shumard, 1858, Trans. St. 

 Louis Acad. Sci., Coal Meas. [Sig. 

 plane-whorled.] 

 pomponius, Billings, 1862, Pal. Foss., Cal- 

 ciferousGr. [Ety. mythological name.] 

 ponderosus. White, 1872, Pal. of E. Neb., 



Coal Meas. [Sig. heavy.] 

 qtiadrangularisy McChesney, 1860, Desc. 

 New Pal. Foss., Coal Meas., syn. for 

 N. occidentalis. 

 rockfordensis. Meek & Worthen, 1866, 

 Proc. Acad. Nat. Sci. Phil., Kinder- 

 hook Gr. [Ety. proper name.] Prob- 

 ably a Gyroceras. See 111. Geo. Sur., 

 vol. 3. 

 eangamonensis. Meek & Worthen , 1860 

 Proc. Acad. Nat. Sci. Phil., Coal Meas. 

 [Ety. proper name.] 



seebachanus, Geinitz, 1866, Carb. und Dyas 

 in Neb., Permian Gr. [Ety. proper 

 name.] This species was made the 

 type by Prof. Meek of the new genus 

 Pteronautilus, which see. 

 spectabilis, see Temnocheilus spectabile. 

 springeri. White & St. John, 1868, Trans. 

 Chi. Acad. Sci., Coal Meas. [Ety. 

 proper name.] 

 striatulus, see Trematodiscus striatulus. 

 subglobosus, Meek & Worthen, 1860, Proc. 

 Acad. Nat. Sci. Phil., Chester Gr. 

 Syn. for N. globatus, see Geo. Sur. 111., 

 vol. 3. 

 submlcaius, Phillips, 1836, Geol. York. 

 Not clearly identified in this country. 

 trigonus, see Trematodiscus trigonus. 

 trisulcatus,^ see Trematodiscus trisulcatus. 

 tyrans, Billings, 1859, Can. Nat. & Geol., 



vol. 4, Chazy Gr. [Sig. a tyrant.] 

 versutus, Billings, 1865, Pal. Foss., Que- 

 bec Gr. [Sig. complicated.] 

 wimloui, see Temnocheilus winslowi. 

 Oncoceras, Hall, 1847, Pal. N. Y., vol. 1. 

 [Ety. onkos, a swelling; keras, horn.] 

 abruptum. Hall, 1861, Rep. of Progr. Wis., 



Trenton Gr. [Sig. abrupt.] 

 alceus, Hall, 1861, Rep. of Progr. Wis., 

 Chazy & Black Riv. Gr. [Ety. my- 

 thological name.] 

 amator, Billings, 1866, Catal. Sil. Foss. 



Antic, Clinton Gr. [Sig. a lover.] 

 clitus, Billings, 1866, Catal. Sil. Foss. 

 Antic, Niagara Gr. [Ety. proper 

 name.] 

 constrictum. Hall, 1847, Pal. N. Y., vol. 

 1, Black Riv. & Trenton Gr. [Sig. 

 constricted.] 

 corydon, Billings, 1866, Catal. Sil. Foss. 

 Antic, Niagara Gr. [Ety. proper 

 name.] 

 dilatatum, Hall, 1860, 13th Reg. Rep., 



Ham. Gr. [Sig. spread out.] 

 expansum, Hall, 1852, Pal. N. Y., vol. 2, 



Coralline Gr. [Sig. expanded.] 

 futile, Billings, 1866, Catal. Sil. Foss. 

 Antic, Clinton Gr. [Sig a water jar, 

 fusiform.] 

 gibbosum. Hall, 1852, Pal. N. Y., vol. 2, 



Medina sandstone. [Sig. gibbous.] 

 lycus, Hall, 1861, Rep. of Progr. Wis.' 

 Chazy & Black Riv. Gr. [Ety. proper 

 name.] 

 orcas. Hall, 1861, (Cyrtoceras orcas) Rep. 

 of Progr. Geo. Sur. of Wis., Niagara 

 Gr. [Ety. proper name.] 

 ovoides. Hall, 1859, Pal. N. Y., vol. 3, 



Low. Held. Gr. [Sig. egg-like.] 

 pandion. Hall, 1861, Rep. of Progr. Wis., 

 Chazy & Black Riv. Gr. [Ety. my- 

 thological name.] 

 pettiti, Billings, 1866, Catal. Sil. Foss. 

 Antic, Niagara Gr. [Ety. proper 

 name.] 

 plebeium. Hall, 1861, Geo. Rep. WMs., 

 Trenton Gr. [Sig. the common sort.] 

 subrectum. Hall, 1852, Pal. N. Y., vol. 2, 

 Clinton Gr. [Sig. nearly straight. 3 



