GASTEROPODA. 



153 



20 



helicteres, Salter, 1859, Can. Org. Rem., 



Decade 1, Black Riv. and Trenton Gr. 



[Sig. a round, smooth spire.] 

 Mrcynia, Billings, 1862, Pal. Foss., vol. 1, 



Guelph Gr. [Ety. proper name.] 



The name was preoccupied bv Eoemer 



in 1843. 

 hermione, Billings, 1862, Pal. Foss., vol. 



1, Chazy or Black Riv. Gr. [Ety. 



mythological name.] 

 hyale, Billings, 1862, Pal. Foss., vol. 1, 



Chazy or Black Riv. Gr. [Ety. proper 



name.] 

 infrequens, Billings, 1859, Can. Nat. & 



Geo., vol. 4, Chazy Gr. [Sig. rare.] 

 inornata. Meek & Worthen, 1866, Proc. 



Acad. Nat. Sci., Coal Meas. [Sig. not 



adorned.] 

 insculpta, Hall, 1858, Trans. Alb. Inst., 



vol. 4, Warsaw Gr. [Sig. engraved.] 

 Jessica, Billings, 1865, Pal. Foss., vol. 1, 



Quebec Gr. [Ety. proper name.] 

 kansasensis. Swallow, 1858, Trans. St. 



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



proper name.] 

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



Niagara Gr. [Ety. proper name.] 

 leda, Hall, 1861, 14th Reg. Rep. N. Y., 



Up. Held. Gr. [Ety. mythological 



name.] 

 limitaris, Hall, 1860, 13th Reg. Rep. N. 



Y., Ham. Gr. [Sig. limited.] 

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



vol. 4, Calciferous Gr. [Sig. marked 



with lines.] 

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



Guelph Gr. [Ety. proper name.] 

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



Guelph Gr. [Sig. long-spired.] 

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



Guelph Gr. [Sig. large or long-spired.] 

 maia, Hall, 1861, 14th Reg. Rep., Up. 



Held. Gr. [Ety. mythological name.] 

 major. Hall, 1851, Geo. Lake Sup. Land 



Dist., vol. 2, Trenton Gr. [Sig. the 



greater.] 

 melaniiformis, Shumard, 1855, Geo. Rep. 



Mo., Calciferous Gr. [Ety. formed 



like the Melania, a genus of shells.] 

 minima. Swallow, 1858, Trans. St. Louis 



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



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

 Low. Held. Gr. [Sig. small.] 



missisquoi, Billings, 1865, Pal. Foss., vol. 

 1, Quebec Gr. [Ety. proper name.] 



modesta, Billings, 1857, Rep. of Progr., 

 Hud. Riv. Gr. [Sig. not large.] 



mucro, Winchell, 1866, Rep. Low. Pen- 

 insula Mich., Ham. Gr. [Sig. a sharp 

 point.] 



multivolvis, Billings, 1857, Rep. of Progr., 

 Hud. Riv. Gr. [Sig. many rolled.] 



mylitta, BiUings, 1862, Pal. Foss., vol. 1, 

 Guelph Gr. [Ety. proper name.] 



nebrascensis, Geinitz, 1866, Carb. und 

 Dyas in Neb., Coal Meas. [Ety. 

 proper name.] 



neglecta, Winchell, 1863, Proc. Acad. Nat. 



Sci., Chemung Gr. [Sig. neglected.] 

 obtusa, Hall, 1852, Pal. N. Y., vol. 2, Cor- 

 alline limestone. [Sig. obtuse.] 

 ozarkensis, Shumard, 1863, Trans. St. 



Louis Acad. Sci., Calciferous Gr. 



[Ety. proper name.] 

 papillosa, Billings, 1857, Rep. of Progr., 



Mid. Sil. [Sig. covered with tubercles.] 

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



Black Riv. and Trenton Gr. [Sig. 



very angular.] 

 perversa. Swallow, 1858, Trans. St. Louis 



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



turned around.] 

 petilla, Hall, 1872, ■24th Reg. Rep., Niag- 

 ara Gr. [Sig. thin, slender.] 

 placida, Billings, 1865, Pal. Fobs., vol. 1, 



Quebec Gr. [Sig. placid, smooth.] 

 procris, Billings, 1862, Pal. Foss., vol. 1, 



Black Riv. Gr. [Ety. mythological 



name.] 

 quadricincta, Winchell, 1863, Proc. Acad. 



Nat. Sci., Chemung Gr. [Sig. four- 

 girded.] 

 rugosa, Billings, 1857, Rep. of Progr., 



Hud. Riv. Gr. [Sig. wrinkled.] 

 serrulata, Salter, 1859, Can. Org. Rem., 



Decade 1, Black Riv. and Trenton Gr. 



[Sig. minutely-serrated.] 

 shumardana, Winchell, 1863, Proc. Acad. 



Nat. Sci. Phil, Chemung Gr. [Ety. 



proper name.] 

 simulatrix, Billings, 1865, Pal. Foss., vol. 



1, Quebec Gr. [Sig. an imitator.] 

 sororcula, Billings, 1865, Pal. Foss., vol. 1, 



Quebec Gr. [Sig. a little sister.] 

 subfusifonnis, see Fusispira subfusiformis. 

 subtseniata, see Orthonema subtaeniatum. 

 subulata, Conrad, 1842, (Loxonema subu- 



lata) Jour. Acad. Nat. Sci., vol. 8, 



Clinton Gr. [Sig. awl-shaped.] 

 sumnerensis, Safford, 1869, Geo. of Tenn., 



Nashville Gr. [Ety. proper name.] 

 Sylvia, Billings, 1865, Pal. Foss., vol. 1, 



Quebec Gr. [Ety. mythological name.] 

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



Coralline limestone. [Sig. like an 



auger.] 

 terebriformis. Hall, 1858, Trans. Alb. 



Inst., vol. 4, Warsaw Gr. [Sig. in the 



form of an auger or borer.] 

 teretiformis, Billings, 1857, Rep. of Progr., 



Hud. Riv. Gr. [Sig. of a long, round 



shape.] 

 texana, Shumard, 1860, Trans. St. Louis 



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



name.] 

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



Trenton Gr. [Sig. three-keeled.] 

 tricingulata, Dawson, 1868, Acad. Geol., 



Carboniferous. [Sig. three-banded.] 

 turricula, Billings, 1857, Rep. of Progr., 



Mid. Sil. [Sig. a little tower.] 

 turricula, Hall, 1862, 15th Reg. Rep. N. 



Y., Ham. Gr. This name was pre- 

 occupied. 



