160 



GASTEROPODA. 



muralis, Owen, 1852, Geo. Sur. Wis., 



Iowa & Minn., Calciferous Gr. [Sig. 



mural.] 

 nasoni. Hall, 1861, Geo. Rep. Wis., Tren- 

 ton Gr. [Ety. proper name.] 

 niota, Hall, 1861, Geo. Rep. Wis., Trenton 



Gr. [Ety. proper name.] 

 nodomarginata, McChesney, 1860, Desc. 



New Pal. Foss., Ham. Gr. [Sig. hav-' 



ing a nodose margin.] 

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



The name was preoccupied by Sand- 



berger in 1842, and by King in 1844. 

 nodulostriata. Hall, 1848, Trans. Alb. Inst., 



vol. 4, Warsaw Gr. [Sig. nodulose 



and striated.] 

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



Quebec Gr. [Ety. proper name.] 

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



Birdseye Gr. [Sig. like a little nut.] 

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



Quebec Gr. [Ety. mythological name.] 

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



Birdseye Gr. [Sig. obsolete.] 

 obtusispira, Shumard, 1859, Trans. St. 



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



having a blunt spire.] 

 occidens, Hall, 1867, 20th Reg. Rep., Ni- 

 agara Gr. [Sig. western.] 

 parvispira, Winchell, 1862, Rep. Low. 



Peninsula Mich., Ham. Gr. [Sig. 



having a small spire.] 

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



vol. 4, Chazy Gr. [Sig. poor.] 

 pauper, Hall, 1865, 20th Reg. Rep. The 



name was preoccupied. 

 percarinata, see Cyclonema percarinatum. 

 perhumerosa, Meek, 1872, Pal. E. Neb., 



Coal Meas. [Sig. very humid.] 

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



Guelph Gr. [Sig. very wide.] 

 perornata, Shumard, 1859, Trans. St. 



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



highly ornamented.] 

 pervetusta, Conrad, 18 3 8, (Cyclostoma 



pervetusta) Ann. Rep. N. Y., Medina 



sandstone. [Sig, very ancient.] 

 piasaensis, Hall, 1858, Trans. Alb. Inst., 



vol. 4, Warsaw Gr. [Ety. proper 



name.] 

 planidorsalis. Hall, 1876, Illust. Devonian 



Foss., Ham. Gr. [Sig. plane-backed.] 

 plena. Hall, 1876, Illust. Devonian Foss., 



Ham. Gr. [Sig. full, large.] 

 postumia, Billings, 1862, Pal. Foss., vol. 



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

 poulsoni, Conrad, 1842, Jour. Acad. Nat. 



Sci., vol. 8, Onondaga Gr. [Ety. proper 



name.] 

 pratteni. Meek & Worthen, 1860, Proc. 



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



[Ety. proper name.] 

 princessa, Billings, 1874, Pal. Foss., vol. 



2, Up. Held. Gr. [Sig. a princess.] 

 progne, Billings, 1860, (^an. Nat. & Geol., 

 • vol. 5, Black Riv. & Trenton Gr. [Ety. 



mythological name.] 



proutana, Shumard, 1859, Trans. St. Louis 



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



name.] 

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



1, Birdseye Gr. [Sig. four-ribbed.] 

 quebecensis, Billings, 1865, Pal. Foss., 



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

 quinquesulcata, Winchell, 1865, Proc. 



Acad. Nat. Sci., Chemung Gr. [Sig. 



five-furrowed.] 

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



vol. 4, Calciferous Gr. [Ety. proper 



name.] 

 regulata. Hall, 1860, 13th Reg. Rep., Ham. 



Gr. [Sig. regular.] 

 riddlei, Shumard, 1860, Trans. St. Louis 



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



name.] 

 rota, Winchell, 1863, Proc. Acad. Nat. Sci., 



Chemung Gr. [Sig. a wheel.] 

 rotalia. Hall, 1862, 15th Reg. Rep., Ham. 



Gr. [Sig. wheeled.] 

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



Black Riv. and Trenton Gr. [Sig. like 



a little wheel.] 

 rotunda. Hall, 1843, (Euomphalus (?) ro- 



tundus) Geo. Rep. 4th Dist. N. Y., 



Corniferous Gr. [Sig. rounded.] 

 rotundata, Hall, 1858, Trans. Alb. Inst., 



vol. 4, Warsaw Gr. This name was 



preoccupied by Munster. 

 rotundispira, Billings, 1865, Pal. Foss., 



vol. 1, Quebec Gr. [Sig. having a 



round spire.] 

 scitula. Meek & Worthen, 1860, Proc. 



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



Meas. [Sig. pretty, neat.] 

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



Quebec Gr. [Sig. choice, select.] 

 semele. Hall, 1861, Geo. Rep. Wis., Hu(i. 



Riv. Gr. [Ety. mythological name.] 

 shumardi, Meek & Worthen, 1860, Proc. 



Acad. Nat. Sci. Phil., Keokuk Gr. 



[Ety. proper name.] 

 sigaretoides, Winchell & Marcy, 1865, 

 • Bost. Soc. Nat. Hist., vol. 1, Niagara 



Gr. [Sig. like a shell of the genus 



Sigaretus. ] 

 sinistrorsa, Swallow, 1858, Trans. St. Louis 



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



to the left.] 

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



Guelph Gr. [Sig. like a shell of the 



genus Solarium.] 

 speciosa. Meek & Worthen, 1860, Proc. 



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



[Sig. beautiful.] 

 sphserulata, Conrad, 1842, Jour. Acad. 



Nat. Sci., vol. 8, Coal Meas. [Sig. 



a widened sphere.] 

 spironema. Meek & Wortheh, 1866, Proc. 



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



spiral-lined.] 

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



Quebec Gr. [Sig. betrothed.] 

 Stella, Winchell, 1862, Proc. Acad. Nat. 

 Sci., Marshall Gr. [Sig. a star.] 



