154 



GASTEROPODA. 



turritella, Hall, 1858, Trans. Alb. Inst., 



vol. 4, Warsaw Gr. [Sig. a little 



tower.] 

 turritiformis, Hall, 1852, Pal. N. Y., vol. 



2, Guelph Gr. [Sig. like a tower.] 

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



1, Trenton & Hud. Riv. Gr. [Sig. 



having one angular line.] 

 uniangulata var. abbreviata, Hall, 1847, 



Pal. N. Y., vol. 1, Hud. Riv. Gr. [Sig. 



comparatively shortened.] 

 varians, Billings, 1857, Rep. of Progr., 



Hud. Riv. Gr. [Sig. variable.] 

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



Birdseve Gr. [Sig. varicose.] 

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



Black Riv. & Trenton Gr. [Sig. ven- 



tricose.] 

 vermicula, Hall, 1858, Trans. Alb. Inst., 



vol. 4, Warsaw Gr. [Sig. worm- 

 shaped.] 

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



Calciferous Gr. [Ety. mythological 



name.] 

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



Guelph Gr. [Ety. proper name.] 

 vittala, see Fusispira vittata. 

 Xanthippe, Billings, 1862, Pal. Foss., vol. 



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

 Natica, Adanson, 1757, Histoire Naturelle 



du Senegal, etc. [Ety. nato, to swim 



with a fluctuating motion.] This genus 



is unknown in Palaeozoic rocks. 

 altonensis, see Naticopsis altonensis. 

 carleyana, see Naticopsis carleyana. 

 chesterensis, see Naticopsis chesterensis. 

 littonana, see Naticopsis littonana. 

 magister, syn. for Naticopsis ventricosa. 

 shumardi, see Naticopsis shumardi. 

 ventricosa, see Naticopsis ventricosa. 

 Naticopsis, McCoy, 1844, Synop.Carb. Foss., 



Ireland. [Ety. from resemblance to 



the genus Natica.~\ 

 aequistriata. Meek, 1873, Ohio Pal., vol. 



1, Cornif. Gr. [Sig. having equal 



striae.] 

 altonensis, McChesney, 1865, (Natica 



altonensis) Desc. New Pal. Foss., Coal 



Meas. [Ety. proper name.] 

 carleyana, Hall, 1858, (Natica carleyana) 



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



[Ety. proper name.] 

 chesterensis, Swallow, 1863, Trans. St. 

 , Louis Acad. Sci., Kaskaskia Gr. [Ety. 



proper name.] 

 cretaeea, Hall, 1873, 23rd Reg. Rep. N. Y., 



Cornif. Gr. [Sig. chalk-like.] 

 depressa, Winchell, 1863, Proc. Acad. 



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

 pressed.] 

 dispassa, Dawson, 1868, Acad. Geol., 



Carbonif. [Sig. much spread out.] 

 gigantea, Hall, 1873, 23rd Reg. Rep. N. 



Y., Chemung Gr. [Sig. unusually 



large.] 

 hollidayi, see Trachydomia hollidayi. 

 howi, Hartt, 1868, Acad. Geol., Carboni- 

 ferous. [Ety. proper name.] 



humilis, Meek, 1871, (Isonema humilis) 



Proc. Acad. Nat. Sci. Phil., Cornif. 



Gr. [Sig. small, dwarfish.] 

 lsevis, Meek, 1871, Proc. Acad. Nat. Sci., 



Cornif. Gr. [Sig. smooth.] 

 littonana, Hall, 1858, (Natica littonana) 



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



[Ety. proper name.] 

 magvder, syn. for N. ventricosa. 

 nana, Meek & Worthen, 1860, (Platys- 



toma nana) Proc. Acad. Nat. Sci., Coal 



Meas. [Sig. dwarfish.] 

 nodosa, see Trachydomia nodosa, 

 pricei, Shumard, 1858, Trans. St. Louis 



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



proper name.] 

 remex, White, 1876, Geo. Uinta Moun- 

 tains, Low. Aubrey Gr. [Sig. a rower.] 

 shumardi, McChesney, 1860, (Natica 



shumardi) Desc. New Pal. Foss., Coal 



Meas. [Ety. proper name.] 

 subovata, Worthen, 1873, Geo. Sur. 111., 



vol. 5, Coal Meas. [Sig. somewhat 



ovate.] 

 ventricosa, Norwood & Pratten, 1855, 



(Natica ventricosa) Jour. Acad. Nat. 



Sci., Coal Meas. [Sig. ventricose.] 

 wheeleri, Swallow, 1860, (Littorina 



wheeleri) Trans. St. Louis Acad. Sci., 



Coal Meas. [Ety. proper name.] 

 Omphalotrochus, Meek, 1864, Geo. California. 



A name proposed as a subgenus of 



Euomplialus or Straparollus. 

 Ophileta, Yanuxem, 1842, Geo. Rep. N. Y. 



[Ety. ophis, a snake.] 

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



Quebec Gr. [Sig. concealed.] 

 (?) bella, Billings, 1865, Pal. Foss., vol. 1, 



Quebec Gr. [Sig. beautiful.] 

 compacta, Salter, 1859, Can. Org. Rem., 



Decade 1, Calciferous Gr. [Sig. com- 

 pact.] 

 complanata, Vanuxem, 1842, Geo. Rep. 



N. Y., Calciferous Gr. [Sig. smoothed.] 

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



Calciferous Gr. [Sig. disjoined.] 

 levata, Vanuxem, 1842, Geo. Rep. N. Y., 



Calciferous Gr. [Sig. polished, 



smoothed.] 

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



Quebec Gr. [Ety. mythological name.] 

 ottawaensis, Billings, 1860, Can. Nat. & 



Geol., vol. 5, Trenton Gr. [Ety. my- 

 thological name.] 

 owenana, Meek & Worthen, 1868, Geo. 



Sur. 111., vol. 3, Galena Gr. [Ety. 



proper name. ] 

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



Quebec Gr. [Sig. deep.] 

 sordida, Hall, 1847, (Maclurea sordida) 



Pal. N. Y., vol. 1, Calciferous Gr. [Sig. 



paltry.] 

 uniangulata, Hall, 1847, (Euomphalus uni- 



angulatus) Pal. N. Y., vol. 1, Calcifer. 



Gr. [Sig. one angled ; from the angu- 

 lar line on one whorl.] 



