«2 



GASTEROPODA. 



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



Calcif. Gr. [Ety. mythological name.] 

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



Quebec Gr. [Ety. mythological name.] 

 quebecensis, Billings, 1865, Pal. Foss., 



vol. 1, Quebec Gr. [Ety. proper 



name.] 

 rugosa, Hall, 1847, Pal. N. Y., vol. l,Hud. 



Riv. Gr. [Sig. wrinkled.] 

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



Calcif. Gr. [Sig. simple.] 

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



Black Riv. Gr. [Sig. magnificent.] 

 trentonensis, Billings, 1862, Pal. Foss., 



vol. 1, Trenton Gr. [Ety. proper 



name.] 

 undata, Winchell, 1865, Proc. Acad. Nat. 



Sci. Phil., Kinderhook Gr. [Sig. 



wavy.] 

 umbella, Meek & Worthen, 1866, Proc. 



Acad. Nat. Sci. Phil., Burlington Gr. 



[Sig. umbrella-like.] 

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



Quebec Gr. [Ety. mythological name.] 

 Microceras, Hall, 1845, Am. Jour. Sci., vol. 



48. [Ety. mikros, small; keras, horn.] 

 inornatus, Hall, 1845, Am. Jour. Sci., vol. 



48, Cin'ti Gr. [Sig. not adorned, 



smooth.] 

 Microdoma, Meek & Worthen, 1866, Proc. 



Acad. Nat. Sci. [Ety. mikros, small ; 



domus, house.] 

 conica, Meek & Worthen, 1866, Proc. 



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



[Sig. conical.] 

 Murchisonia, D'Archiac & Verneuil, 1841, 



Bull. Soc. Geo. Fr., vol. 12. [Ety. 



proper name.] 

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



Chazy Gr. The name was preoccu- 

 pied by Koninck in 1841. 

 aciculata, Hall, 1860, Can. Nat. & Geo., 



vol. 5, Silurian. [Sig. needle-pointed.] 

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



Quebec Gr. [Ety. proper name.] 

 ada, Billings, 1865, Pal. Foss., vol. 1, Cal- 



ciferous Gr. [Ety. proper name.] 

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



Quebec Gr. [Ety. proper name.] 

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



Quebec Gr. [Sig. from the depths.] 

 alexandra, Billings, 1865, Pal. Foss., vol. 



1, Black Riv. Gr. [Ety. proper name.] 

 angulata, Phillips, 1836, (Rostellaria an- 



gulata) Geol. of Yorkshire, Devonian. 



[Sig. angulated.] Very doubtfully 



identified in America, 

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



Birdseye Gr. [Sig. narrowed.] 

 anna, Billing3, 1859, Can. Nat. & Geol., 



vol. 4, Calciferous Gr. [Ety. St. Annis 



in Canada.] 

 archimedea, McChesney, 1861, Desc. 



New Pal. Foss., Coal Meas. [Sig. per- 

 taining to the machine invented by 



Archimedes.] 

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



vol. 4, Calciferous Gr. [Sig. sandy.] 



arisaigensis, Hall, 1860, Can. Nat. & Geo., 

 vol. 5, Silurian. [Ety. proper name.] 



artemisia, Billings, 1865, Pal. Foss., vol. 

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



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

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



attenuata, Hall, 1858, Trans. Alb. Inst,, 

 vol. 4, Warsaw Gr. [Sig. drawn out, 

 attenuated.] 



augustina, Billings, 1865, Pal. Foss., vol. 

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



bellicincta, Hall, 1847,*Pal. N. Y., vol. 1, 

 Trenton & Hud. Riv. Gr. [Sig. beau- 

 tifully banded.] 



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

 Trenton & Hud. Riv. Gr. [Sig. double- 

 banded.] This name was preoccupied 

 by McCoy in 1844. 



bilirata, Hall, 1859, Pal. N. Y., vol. 3, 

 Low. Held. Gr. [Sig. double-fur- 

 rowed.] 



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

 Guelph Gr. [Sig. double-banded.] 



bowdeni, Safford, 1869, Geo. of Tenn., 

 Nashville Gr. [Ety. proper name.] 



boydi, Hall, 18 43, (Loxonema boydi) 

 Geo. Rep. 4th Dist. N. Y., Guelph Gr. 

 [Ety. proper name.] 



boylii, Nicholson, 1875, Quar. Jour. Geo. 

 Soc. Lond., vol. 31, Guelph Gr. [Ety. 

 proper name.] 



carinifera, Shumard, 1863, Trans. St. Louis 

 Acad. Sci., Calciferous Gr. [Sig. keel- 

 bearing.] 



cassandra, Billings,. 1865, Pal. Foss., vol. 

 1, Quebec Gr. [Ety. mythological 

 name.] 



catherina, Billings, 1865, Pal. Foss., vol. 

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



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

 Quebec Gr. [Ety. proper name.] 



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

 Medina Gr. [Sig. somewhat conical.] 



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

 agara Gr. [Ety. proper name.] 



desiderata, Hall, 1862, 15th Reg. Rep., 

 Up. Held. Gr. [Sig. desired.] 



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

 Up. Held. Gr. [Sig. excellent.] 



elegantula, Hall, 1858, Trans. Alb. Inst., 

 vol. 4, Warsaw Gr. [Sig. quite elegant.] 



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

 Guelph Gr. [Ety. proper name.] 



extenuata, Hall, 1859, Pal. N. Y., vol. 3, 

 Low. Held. Gr. [Sig. thinned-out.] 



funata, Billings, 1866 r Catal. Sil. Foss. 

 Antic, Anticosti Gr. [Sig. corded.] 



gigantea, Billings, 1857, Rep. of Progr., 

 Mid. Sil. [Sig. unusually large.] 



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

 Trenton & Hud. Riv. Gr. [Sig. slen- 

 der.] , 



gypsea, Dawson, 1868, Acad. Geol., Car- 

 boniferous. [Sig. gvpsum.] 



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

 Devonian. [Ety. mythological name.] 



