GASTEROPODA. 



161 



subangulata, Hall, 1858, Trans. Alb. Inst., 

 vol. 4, Warsaw Gr. [Sig. somewhat 

 angular.] 



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

 Black Riv., Trenton & Hud. Riv. Gr. 

 [Sig. somewhat conical.] 



subconstricta, Meek & Worthen, 1860, 

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

 Meas. [Sig. somewhat constricted.] 



subdecussata, Geinitz, 1866, Carb. und 

 Dyas in Neb., Coal Meas. [Sig. some- 

 what arranged in pairs that ci'oss each 

 other.] 



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

 Coralline limestone. [Sig. somewhat 



g 



subscalaris, Meek & Worthen, 1860, Proc. 



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



[Sig. somewhat ladder-shaped.] 

 subsinuata, Meek & Worthen, 1860, Proc. 



Acad. Nat. Sci. Phil., Coal Meas. [Sig. 



somewhat sinuated.] 

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



1, Trenton Gr. [Sig. finely shaped.] 

 subturbinata, Meek & Hayden, 1872, 



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



[Sig. somewhat top-shaped.] 

 sulcomarginata, Conrad, 1842, Jour.Acad. 



Nat. Sci., vol. 8, Ham. Gr. [Sig. hav- 

 ing the margin deeply furrowed.] 

 supracingulata, Billings", 1857, Rep. of 



Progr., Trenton Gr. [Sig. encircled 



with lines on the upper part.] 

 swallovana, Hall, 1858, Trans. Alb. Inst., 



vol. 4, Warsaw Gr. [Ety. proper name.] 

 sybillina, Billings, 1866, Catal. Sil. Foes. 



Antic, Anticosti Gr. [Ety. proper 



name.] 

 tabulata, Conrad, 1835, (Turbo tabulata) 



Trans. Geo. Soc. Penn., vol. 1, Coal 



Meas. [Sig. tabulated.] 

 tectoria, Winchell, 1863, Proc. Acad. Nat. 



Sci., Chemung Gr. [Sig. rough cast.] 

 tenuicincta, Meek & Worthen, 1860, Proc. 



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



finely girded.] 

 tenuistriata, Shumard, 1860, Trans. St. 



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



finely striated.] 

 textiligera, Meek, 1871, Proc. Acad. Nat. 



Sci., Waverly Gr. [Sig. web-bearing.] 

 thalia, Billings," 1857, Rep. of Progr., Mid. 



Sil. [Ety. mythological name.] 

 trilineata, Hall, 1858, Trans. Alb. Inst., 



vol. 4, Warsaw Gr. [Sig. three-lined.] 

 trilix, Hall, 1862, 15th Reg. Rep. N. Y., 



Ham. Gr. [Sig. three-lined.] 

 trochiformis, Swallow, 1863,Trans. St. Louis 



Acad. Sci., Chester Gr. [Sig. like the 



Trochus, or wheel-shell.] The name 



was preoccupied by Portlock in 1843. 

 tropidophora, Meek, 1872, Am. Jour. Sci. 



& Arts, 3rd series, vol. 4, Cin'ti Gr. 



[Sig. keel-bearing.] 

 tumida, Meek & Worthen, 1860, (Platy- 



stoma tumida) Proc. Acad. Nat. Sci., 



Coal Meas. [Sig. tumid.] The name 



was preoccupied by Phillips in 1836. 



turbiniformis, Meek & Worthen, I860, 



Proc. Acad. Nat. Sci., Coal Meas. [Sig. 



top-shaped.] 

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



Calciferous Gr. [Sig. swollen.] 

 umbilicata, see Trochonema umbilicatum. 

 unimkata, see Platvceras unisulcatum. 

 vadosa, Hall, 1860, "l3th Reg. Rep., N. Y., 



Ham. Gr. [Sig. shallow.] 

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



Quebec Gr. [Sig. dispersed.] 

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



Guelph Gr. [Ety. proper name.] 

 valvatiformis, Meek & Worthen, 1866, 



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



[Sig. like the genus ValvataJ] 

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



Guelph Gr. [Sig. a violet.] 

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



Quebec Gr. [Sig. a virgin.] 

 virguncula, Billings, 1865, Pal. Foss., vol. 



1, Quebec Gr. [Sig. a little maid.] 

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



Black Riv. Gr. [Ety. proper name.] 

 voltumna, Billings, 1874, Pal. Foss., vol. 



2, Devonian. [Ety. mythological 

 name.] 



whitii, Winchell, 1862, Proc. Acad. Nat. 



Sci., Marshall Gr. [Ety. proper name.] 

 wortheni, Hall, 1856, Trans. Alb. Inst., 



vol. 4, Warsaw Gr. [Ety. proper 



name.] 

 Polyphemopsis, Portlock, 1843, Geol. Lon- 

 donderry. [Ety. Polyphe>7ius, a genus 



of shells; opsis, appearance.] 

 bulimiformis, Hall, 1858, (Bulimella buli- 



miformis) Trans. Alb. Inst., vol. 4, 



Warsaw Gr. [Sig. like a Bulimus.] 

 canaliculata, Hall, 1858, (Bulimella canal- 



iculata) Trans. Alb. Inst., vol. 4, War- 

 saw Gr. [Sig. channeled or grooved.] 

 chrysalis, Meek & Worthen, 1866, Proc. 



Acad. Nat. Sci. Phil, Coal Meas. [Sig. 



chrysalis.] 

 ehngata, Hall, 1858, (Bulimella elongata) 



Trans. Alb. Inst., vol. 4, Warsaw Gr. 



[Sig. lengthened.] The name was 



preoccupied by Portlock in 1843. 

 inornata, Meek & Worthen, 1860, (Lox- 



onema inornata) Proc. Acad. Nat. Sci. 



Phil., Up. Coal Meas. [Sig. not 



adorned.] 

 louisvillffi, Hall, 1872, 24th Reg. Rep., 



Up. Held. Gr. [Ety. proper name.] 

 nitidula, Meek & Worthen, 1860, (Lox- 



onema nitidula) Proc. Acad. Nat. Sci. 



Phil, Up. Coal Meas. [Sig. quite 



neat.] 

 peracuta, Meek & Worthen, 1860, (Euli- 



ma (?) peracuta) Proc. Acad. Nat. Sci. 



Phil., Up. Coal Meas. [Sig. very 



sharp-pointed.] 

 Poecellia, Leveille, 1835, Mem. Soc. Geol. 



France. [Etv. porcellus, a little pig.] 

 hertzeri, Hall, 1876, Illust. Devonian 



Foss., Up. Held. Gr. [Ety. proper 



name.] 



