182 



LAMELLIBRANCHIATA. 



leda, Hall, 1860, 13th Reg. Rep. N. Y., 



Ham. Gr. [Ety. mythological name.] 

 sinuata, see Ilionia sinuata. 

 Anodontopsis, McCoy, 1851, Ann. & Mag. 



Nat. Hist., 2nd series, vol. 7. [Ety. 



from the resemblance to the shells of 



the genus Anodonta.~\ 

 (?) milleri, Meek, 1871, Am. Jour. Sci., 



3rd series, vol. 2, Cin'ti Gr. [Ety. 



proper name.] 

 (?) unionoides, Meek, 1871, Am. Jour. 



Sci., 3rd series, vol. 2, Cin'ti Gr. [Sig. 



like a Unio.~\ This species is probably 



a Modiolopsis. 

 ventricosa, Billings, 1874, Pal. Foss., vol. 



2, Devonian. [Sig. bulging out.] 

 Anomalodonta, S. A. Miller, 1874, Cin. 



Quar. Jour. Sci., vol. 1. [Sig. anom- 

 alous-toothed.] 

 alata, Meek, 1872, (Ambonychia alata) 



Proc. Acad. Nat. Sci. Phil., Cin'ti Gr. 



[Sig. winged.] 

 gigantea, S. A. Miller, 1874, Cin. Quar. 



Jour; Sci., vol. 1, Cin'ti Gr. [Sig. 



very large.] 

 Anthracomya, Salter, 1861, Mem. Geo. Sur. 



Gr, Brit. [Ety. anthrax, coal; Mya, 



a genus of shells.] 

 angulata, Dawson, 1860, (Naiadites angu- 



lata) Acadian Geology, Coal Meas. 



[Ety. from the angular outline of the 



posterior extremity.] 

 arenacea, Dawson, 1860, (Naiadites are- 



nacea) Acadian Geology, Coal Meas. 



[Ety. from the arenaceous shale.] 

 carbonaria, Dawson, 1860, (Naiadites car- 



bonaria) Acadian Geology, Coal Meas. 



[Ety. from the Coal Measures.] 

 elongata, Dawson, 1860, (Naiadites elon- 



gata) Acadian Geology, Coal Meas. 



[Ety. from the elongation laterally.] 

 lsevis, Dawson, 1860, (Naiadites lsevis) 



Acadian Geology, Coal Meas. [Sig. 



smooth.] 

 obtusa, Dawson, 1860, (Naiadites obtusa) 



Acadian Geology, Coal Meas. [Ety. 



from the obtuse anterior end.] 

 ovalis, Dawson, 1860, (Naiadites ovalis) 



Acadian Geology, Coal Meas. [Sig. 



oval.] 

 Anthracoptera, Salter, 1862, Mem. Geo. 



Sur. Gr. Brit. [Ety. anthrax, coal; 



pteron, a wing.] 

 carbonaria, see Anthracomya carbonaria. 

 fragilis, Meek & Worthen, 1866, Proc. 



Chi. Acad. Sci., Keokuk Gr. [Sig. 



easily broken.] 

 hems, see Anthracomya lsevis. 

 Area, Linne, 1758. This genus is unknown 



in the palaeozoic rocks. 

 carbonaria, Cox, 1857, Geo. Sur. Ky., vol. 



3. See Macrodon carbonarius. 

 cuspidata, Swallow, 1858, Trans. St. Louis 



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

 pointed.] 

 modesta, Winchell, 1863, Proc. Acad. Nat. 

 Sci., Chemung Gr. [Sig. modest, 

 small.] 



striata, Schlotheim, as identified by 



Geinitz, is Macrodon tenuistriatus. 

 punctifera, Dawson, 1868, Acad. Geol., 



Carb. [Sig. bearing dots.] The name 



was preoccupied by Deshayes in his 



work, 1824-1836. 

 Anthracosia, King, 1844, in Mag. Nat. Hist. 



[Ety. anthrax, coal.] 

 bradorica, Dawson, 1868. Acad. Geol., 



Carb. [Ety. proper name.] 

 Astarte, Sowerby, 1818, Min. Conch., vol. 2. 



[Ety. mythological name.] 

 mortonensis, Geinitz, 1866, Carb. und 



Dyas in Neb., Coal Meas. [Ety. 



proper name.] 

 nebrascensis, Geinitz, 1866, Carb. und 



Dyas in I^b., Coal Meas. [Ety. 



proper name.] 

 sublextilis, see Cardiomorpha subtextilis. 

 Astartella, Hall, 1858, Geo. Rep. Iowa. 



[Ety. diminutive of Astarte.'] 

 concentrica, McChesney, 1860,(Edmondia 



concentrica) Descr. New Pal. Foss., 



Coal Meas. [Sig. from the concentric 



wrinkles or folds.] 

 newberryi, Meek, 1875, Ohio Pal., vol. 2, 



Coal Meas. [Ety. proper name.] 

 varica, McChesney, 1860, Descr. New Pal. 



Foss., Coal Meas. [Sig. straddling.] 

 vera, Hall, 1858, Geo. Rep. Iowa, Coal 



Meas. [Sig. true, genuine.] 

 Avicula, Klein, 1753, Ostrac. [Ety. avicula, 



a little bird.] 

 acanthoptera, Hall, 1843, Geo. Rep. 4th 



Dist. N. Y., Chemung Gr. [Ety. 



akantha, a spine ; pteron, a wing.] 

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



Coal Meas. [Sig. without ribs.] The 



correct etymology would make this 



word incosta. 

 seqwUatera, see Aviculopecten sequilaterus. 

 sequiradiata, Hall, 1859, Pal. N. Y., vol. 



3, Low. Held. Gr. [Sig. having equal 



radiating striae.] 

 sesopus, Conrad, 1842, Jour. Acad. Nat. 



Sci., vol. 8, Up. Sil. [Ety. proper 



name.] 

 angustirostra, Conrad, 1842, Jour. Acad. 



Nat. Sci., Up. Sil. [Sig. narrow- 

 beaked.] 

 antiqua, see Bakevellia antiqua. 

 armaria. Not American, 

 aviformis, Conrad, 1842, Jour. Acad. Nat. 



Sci., vol. 8, Low. Sil. [Sig. bird-like:'] 

 bella, Conrad, 1841, Ann. Rep. N. Y., 



Devonian. [Sig. beautiful.] 

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



Low. Held. Gr. [Sig. quite beautiful.] 

 boydi, see Pterinea boydi. 

 chemungensis, see Pterinea chemungensis. 

 circulus, Shumard, 1855, Geo. Rep. Mo., 



Kinderhook Gr. [Sig. a circle.] 

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



Low. Held. Gr. [Sig. a common form.] 

 cooperensis, see Entolium cooperense. 

 corrugata, James, 1874, Cin. Quar. Jour. 



Sci., vol. 1, Cin'ti Gr. [Sig. wrinkled.] 

 cruciformis, see Actinodesma truciforme. 



