POL.] 



GASTEROPODA. 



423 



subtilstriata, see Eaphistoma subtilstri- 



atum. 

 subturbinata, Meek & Hayden, 1858, Proc. 



Acad. Nat. Sci. Phil., p. 264, and Pal. 



Up. Mo., p. 47, Coal Meas. 

 sulcomarginata, Conrad, 1842, Jour. Acad. 



Nat. Sci., vol. 8, p. 272, and Pal. N. Y., 



vol. 5, pt. 2, p. 69, Ham. Gr. 

 supracingulata, Billings, 1857, Rep. of 



Progr., Geo. Sur. Can., p. 302, Tren- 



ton Gr. 

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



vol. 4, p. 24, and Bull. Am. Mus. Nat. 



Hist., p. 80, Warsaw Gr. 

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



Antic., p. 54, Anticosti Gr. 

 tabuiata, Conrad, 1835, (Turbo tabulata,) 



Trans. Geo. Soc. Penn., vol. 1, p. 267, 



Coal Meas. 

 taggarti, Meek, 1874, 7th Rep. Hayden's 



U. S. Geo. Sur. Terr., p. 271, and Cont. 



to Pal., No. 6, p. 140, Coal Meas. 

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



Sci., p. 19, Marshall Gr. 

 tenuicincta, Meek & Worthen, 1860, Proc. 



Acad. Nat. Sci., p. 459, and Geo. Sur. 



111., vol. 2, p. 355, Up. Coal Meas. 

 tenuimarginata, Hall, syn. for Eotrochus 



concavus. 

 tenuistriata, Shumard, 1860, Trans. St. 



Louis Acad. Sci., vol. 1, p. 625, Coal 



Meas. 

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



Sci., p. 176, and Ohio Pal., vol. 2, p. 314, 



Waverly Gr. 



thalia, see Cyclonema thalia. 

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



vol. 4, p. 25, and Bull. Am. Mus. Nat. 



Hist., p. 80, Warsaw Gr. 

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



Nat. Hist., p. 45, and Pal. N. Y., vol. 5, 



pt. 2, p. 79, Ham. Gr. 

 trochiformis, Swallow, 1863. The name 



was preoccupied by Portlock in 1843. 



See P. Cooperensis. 

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



and Arts, 3d series, vol. 4, p. 278, and 

 -. 1, p. 154, Hud. 



turbiniformis, Meek 

 & Worthen, 1860, 

 Proc. Acad. Nat. 

 Sci., p. 461, and Geo. 

 Sur. 111., vol. 2, p. 

 359, Up. Coal Meas. 

 turgida, see Holopea 



turgida. 



umbilicata, see Trocho- 

 nema umbilicatum. 

 unisulcata, Conrad, 

 1842, Jour. Phil! 

 Acad. Sci., vol. 8, p. 271, Up. Held. Gr. 

 vadosa, Hall, 1860, 13th Rep. N. Y. 

 Mus. Nat. Hist., p. 108, Kinder- 

 hook Gr. 

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



p. 90, Quebec Gr. 



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

 169, and vol. 3, p. 23, Guelph Gr. 



PIG. 702. Pleuroto- 

 maria turbini- 

 formis - 



valvatiformis, Meek & Worthen, 1866, 

 Proc. Acad. Nat. Sci. Phil., p. 273, 

 and Geo. Sur. 111., vol. 5, p. 602, Coal 

 Meas. 



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

 169, Guelph Gr. 



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

 224, Quebec Gr. 



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



1, p. 225, Quebec Gr. 



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



p. 171, Black Riv. Gr. 

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



2, p. 61, Gaspe limestone No. 8, De- 

 vonian. 



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

 Sci., p. 423, Marshall Gr. 



wortheni, Hall, 1858, Trans. Alb. Inst., 

 vol. 4, p. 23, and Geo. Sur. Iowa, p. 664, 

 Warsaw Gr. 



POLYPHEMOPSIS, Portlock, 1843, Geol. Lon- 

 donderry, p. 415. [Ety. Polyphemus, a 

 genus of shells; opsis, appearance.] 

 Subfusiform ; spire elongated ; whorls 

 flattened, last one produced below and 

 forming half the length of the shell ; 

 outer lip thin, nearly straight; inner 

 lip wanting; columella without folds, 

 slightly twisted and truncated at the 

 connection with the outer lip ; aper- 

 ture narrow, subovate, effuse or slightly 

 notched at the base of the columella ; 

 surface smooth, or only with obscure 

 lines of growth. Type P. elongata. 



chrysalis, Meek & Worthen, 1866, Proc. 

 Acad. Nat. Sci. Phil., p. 267, and Geo. 

 Sur. 111., vol. 5, p. 596, Coal Meas. 



keokuk, Worthen, (in press,) Geo. Sur. 

 111., vol. 8, p. 144. Keokuk Gr. 



inornata. Meek & Worthen, 1860, (Loxo- 

 nema inornatum,) Proc. Acad. Nat. Sci. 

 Phil., p. 463, and Geo. Sur. 111., vol. 2, 

 p. 374, Up. Coal Meas. 



louisvillse, Hall & Whitfield, 1872, 24th 

 Rep. N. Y. Mus. Nat. Hist., p. 193, Up. 

 Held. Gr. 



melanoides, Whitfield, 1882, Ann. N. Y. 

 Acad. Sci., vol. 2, p. 225, Kaskaskia Gr. 



nitidula, Meek & 

 Worthen, 1860, 

 (Loxonema nitid- 

 ula,) Proc. Acad. 

 Nat. Sci. Phil., 

 p. 465, and Geo. 

 Sur. 111., vol. 2, p. 

 374, Up. Coal 

 Meas. 



peracuta, Meek & 

 Worthen, 1860, 

 (Eulima (?) pera- 

 cuta,) Proc. Acad. 

 Nat. Sci. Phil., p. 

 466, arid Geo. Sur. 

 111., vol. 2, p. 375, 

 Up. Coal Meas. 



teretiformis, Hall, 1877, 1st Ed. Am. Pal. 

 Foss., p. 245, Warsaw Gr. Proposedjin- 

 stead of P. elongata, Hall, 1858, which 

 was preoccupied. 



