158 



GASTEROPODA. 



advena, Winchell, 1864, Am. Jour. Sci. & 



Arts, 2d series, vol. 37. Potsdam Gr. 



[Sig. a stranger.] 

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



Quebec Gr. [Ety. proper name.] 

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



Trenton Gr. [Ety. mythological 



name.] 

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



Trenton Gr. [Sig. doubtful.] 

 americana, Billings, 1860, Can. Nat. & 



Geo., vol. 5, Trenton Gr. [Ety. proper 



name.] 

 amphitrite, Billings, 1862, Pal. Foss., vol. 



1, Chazy or Black Riv. Gr. [Ety. 



mythological name.] 

 angulata, Conrad, 1843, Proc. Acad. Nat. 



Sci. Phil. This name was preoccupied 



by Sowerby. 

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



Chazy Gr. [Sig. antiquated.] 

 aperta, see Raphistoma apertum. 

 apicalis, Hall, 1876, Illust. Devonian Foss., 



Chemung Gr. [Sig. apical.] 

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



Calciferous Gr. [Ety. proper name.] 

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



Black Riv. Gr. [Ety. mythological 



name.] 

 arata, Hall, 1862, 15th Reg. Rep., Scho- 

 harie grit. [Sig. furrowed.] 

 axion, Hall, 1867,20th Reg. Rep., Niagara 



Gr. [Sig. furrowed.] 

 beckwithana, McChesney, 1860, Desc. 



New Pal. Foss., Coal Meas. [Ety. 



proper name.] 

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



Chazy Gr. [Sig. double-angled, from 



the two angular elevations on each 



whorl.] 

 bicarinata, McChesney, 1860. This name 



was preoccupied and the species is 



now called P. turbiniformis. 

 Mix, see Cyclonema bilix. 

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



Guelph Gr. [Sig. two-whorled.] 

 bonharborensis, Cox, 1857, Geo. Sur. Ky., 



vol. 3, Coal Meas. [Ety. proper 



name.] 

 brazoensis, Shumard, 1860, Trans. St. 



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



proper name.] 

 calcifera, Billings, 1859, Can. Nat. & Geo., 



Calciferous Gr. [Ety. from the Cal- 

 ciferous Group.] 

 calphurnia, Billings, 1865, Pal. Foss., vol. 



1, Quebec Gr. [Ety. mythological 



name.] 

 calyx, Billings, 1859, Can. Nat. & Geo., 



vol. 4, Chazy Gr. [Sig. a cup.] 

 canadensis, Billings, 1865, Pal. Foss., 



vol. 1, Calciferous Gr. [Ety. proper 



name.] 

 capillaria, Conrad, 1842, Jour. Acad. Nat. 



Sci., vol. 8, Ham. Gr. [Sig. pertain- 

 ing to hair.] 



carbonaria, Norwood & Pratten, 1855, 



Jour. Acad. Nat. Sci., 2d series, vol. 3, 



Coal Meas. [Sig. pertaining to coal.] 

 casii, Meek & Worthen, 1868, Geo. Sur. 



111., vol. 3, Niagara Gr. [Ety. proper 



name.] 

 cavumbilicata, Winchell, 1866, Rep. Low. 



Peninsula Mich., Ham. Gr. [Sig. 



having a hollow umbilicus.] 

 chesterensis, Meek & Worthen, 1860, 



Proc. Acad. Nat. Sci., Chester Gr. 



[Ety. proper name.] • 

 cliesterensis, Swallow, 1863, Trans. St. Louis 



Acad. Sci., Chester Gr. The name 



was preoccupied, 

 circe, Billings, 1857, Rep. of Progr., Hud. 



Riv. Gr. [Ety. mythological name.] 

 concava. Hall, 1858, Trans. Alb. Inst., vol. 



4, Warsaw Gr. The name was pre- 

 occupied by Deshayes in 1824-'36. 

 conoides, Meek & Worthen, 1866, Proc. 



Acad. Nat. Sci., Coal Meas. The 



name was preoccupied by Deshayes 



in 1831. 

 conulus, Hall, 1858, Trans. Alb. Inst., vol. 



4, Warsaw Gr. [Sig. a little cone.] 

 coronula, syn. for P. sphaerulata.] 

 coxana, Meek & Worthen, 1866, Proc. 



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



proper name.] 

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



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

 cryptata, Billings, 1866, Catal. Sil. Foss., 



Antic, Anticosti Gr. [Sig. concealed.] 

 cyclonemoides, Meek & Worthen, 1868, 



Geo. Sur. 111., vol. 3, Niagara Gr. [Sig. 



like a Cyclonema.] 

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



Guelph Gr. [Ety. mythological 



name.] 

 delia, Billings, 1874, Pal. Foss., vol. 2, 



Devonian. [Ety. mythological name.] 

 delicatula, Hall, 1876, Illust. Devonian 



Foss., Up. Held. Gr. [Sig. very deli- • 



cate.] 

 delphinuloides, Goldfuss, as identified by 



d'Archiac & Verneuil. Not American, 

 depauperata, Hall, 1862, Geo. Rep. Wis., 



Hud. Riv. Gr. [Sig. impoverished.] 

 depressa, Cox, 1857, Geo. Sur. Ky., vol. 3, 



Coal Meas. The name was preoccu- 

 pied by Passy in 1832, by Phillips in 



1836, and by Koninck in 1841. 

 disjuncta, Hall, 1876, Illust. Devonian 



Foss., Ham. Gr. [Sig. disjoined.] 

 dispersa, Dawson, 1868, Acad. Geol., 



Carboniferous. [Sig. dispersed.] 

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



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

 doris, Hall, 1862, 15th Reg. Rep., Scho- 

 harie & Cornif. Gr. [Ety. mythologi- 

 cal name.] 

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



Black Riv. Gr. [Ety. mythological 



name.] 

 ella, Hall, 1876, Illust. Devonian Foss., . 



Ham. Gr. [Ety. proper name.] 



