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. mytiiologioal 



name.] 

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



Trenton Gr. [Sig. dofttful.] 

 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 Fo.ss., 



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 ileas. [Ety. 



proper name.] 

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



Chazy Gr. [Sig. double-angled, from 



the two angular elevations on each 



whorl.] 

 bicarinala, McChesney, 1860. This name 



was preoccupied and the species is 



now called P. turbiniformis. 

 hilix, 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.] 



carlionaria, Norwood & Pratten, 1855, 

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

 Coul Jfoas. [Sig. pertaining to coal.] 



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

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

 name.] 



cavumbilicata, AVinchell, 1866, Rep. Low. 

 Peninsula Mich., Ham. Gr. [Sig. 

 having a hollow u&bilicus.] 



chesterensis. Meek & Wortlien, 1860, 

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

 [Ety. proper name.] 



i-liraterenau, 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.] 



concttva, 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 ^leas. The 

 name was preoccupied by Deshayes 

 in 1831. 



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

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



cortinida, syu. for P. sphaerulata.] 



coxana, jNEeek & Worthen, 1866, Proc. 

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

 proper name.] 



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

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



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

 Antic, Anticosti fUr. [Sig. concealed.] 



cyclonemoides, Aleek & Worthen, 1868, 

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

 like a C'ljdonema.] 



deiopea, Billings, 18(i2, 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.] 



(h'JjihiMilnidi's, Goldfuss, as identified by 

 d'Archiac & Verneuil. Not American. 



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

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



depressa, Cox, 1S57, Geo. Sur. Ky., vol. 3, 

 Coal Meas. Thejiame 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., 

 \'ol. 4, Chazy Gr. [Sig. teaching.] 



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

 harie & Cornif. Gr. [Ety. mythologi- 

 cal name.] 



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

 Black Riv. Gr. [Ety. mythological 

 name.] 



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

 Ham. (it. [Ety. proper name.] 



