GASTEEOPODA. 



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 ia pairs that cross each 



other.] 

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



Coralline limestone. [Sig. somewhat 



depressed.] 

 subscalaris. Meek & Worthen, I860, 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.] 

 Bulcomarginata, Conrad, 1842, Jour. Acad. 



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

 ing the margin deeply furroweil.] 

 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. propername.] 

 sybillina, Billings, 1866, Catal. Sil. Foss. 



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.] 

 triUneata, Hall, 1858, Trans. Alb. Inst., 



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

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



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

 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. 



21 



turbiniformis, Meek & Worthen, 1860, 



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



top-shaped.] 

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



Calciferous Gr. [Sig. swollen.] 

 umbilicata, see Trochonema umbihcatum. 

 uni.iidcata, see Platyceras unisulcatum. 

 vadcsa. Hall, 1860, 13th Reg. Rep., N. Y., 



Ham. Gr. [Sig. shallow.] 

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



Quebec Gr. [Sig. dispersed.] 

 Valeria, Billings, 1805, Pal. Foss., vol. 1, 



Guelph Gr. [Ety. proper name.] 

 valvatiformis, Meek & Worthen, 1866, 



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



[Sig. like the genus Valnito.l 

 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, AVinchell, 1862, Proc. Acad. Nat. 



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

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



vol. 4, AVarsaw Gr. [Ety. proper 



name.] 

 PoLYPHEMOPSis, Portlock, 1843, Geol. Lon- 

 donderry. [Ety. Polyphemus, a genus 



of shells; opuis, 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 o'r grooved.] 

 chrysalis. Meek & AVorthen, 1866, Proc. 



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



chrysalis.] 

 elongata, 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.] 

 louisvilla. 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. [Ety. porcellm, a little pig.] 

 hertzeri, Hall, 1876, Ulust. Devonian 



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



name.] 



