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.] 

 niotensis, see Temnocheilus niotense. 

 nodocarinatus, McChesney, syn. for N. 



occidentalis. 

 nodoso-dorsatus, Shumard, 1858, Trans. 



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



nodosus, knotty; dorsatus, high-backed.] 

 occidentalis, Swallow, 1858, Trans. St. 



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



wfistern "I 

 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, Illust. Devonian Foss., 



Marcellus shale. [Sig. the east.] 

 ornatus, Hall, 1860, 13th Reg. Rep. See 



Discites ornatus. 

 permianus, Swallow, 1858, Trans. St. 



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



proper name.] 

 planidorsalis, see Trematodiscus planidor- 



salis. 

 planorbiformis, Meek & Worthen, 1860, 



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



[Sig. shaped like a shell of the genus 



PlanorbisJ] 

 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.] 

 quadrangularis, 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. 

 sangamonensis, 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.] 

 striatidus, see Trematodiscus striatulus. 

 subglobosus, Meek & Worthen, 1860, Proc. 



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



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



vol. 3. 

 subsulcatus, Phillips, 1836, Geol.. York. 



Not clearly identified in this country. 

 trigonus, see Trematodiscus trigonus. 

 trimlcatus, 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.] 

 winslouri, see Temnocheilus winslowi. 

 Oncockras, 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. Wis., 



Trenton Gr. [Sig. the common sort.] 

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



Clinton Gr. [Sig. nearly straight. J 



