LAMELLIBRANCHIATA. 



185 



2i 



oblongus, Meek & Worthen, 1860, (Avic- 

 ula oblonga) Proc. Acad. Nat. Sci. 

 Phil., Keokuk Gr. [Sig. oblong.] 

 occidental is, Shumard, 1855, (Pecten oc- 

 cidentalis) Geo. Rep. Mo., Carbonifer- 

 ous & Permian. [Sig. western.] 

 occidentalis, Wincbell, 1863, Proc. Acad. 

 Nat. Sci., Chemung Gr. This name 

 was preoccupied. 

 orbiculatus, see Lyriopecten orbiculatus. 

 oweni, Meek & Wortheh, 1860, Proc. 

 Acad. Nat. Sci. Phil., Keokuk Gr. 

 [Ety. proper name.] 

 parihs, Conrad, 1842, (Avicula parilis) 

 Jour. Acad. Nat. Sci. Phil., vol. 8, 

 Cornif. Gr. [Sig. equal, like.] 

 pecteniformis, Conrad, 1842, (Avicula 

 pecteniformis) Jour. Acad. Nat. Sci., 

 vol. 8, Up. Held. Gr. and Marcellus 

 shale. [Sig. like a Fecten.] 

 pellucid us, Meek & Worthen, 1860, Proc. 

 Acad. Nat. Sci. Phil., Coal Meas. [Sig. 

 clear, transparent.] 

 princeps, Conrad, Ham. Gr. [Sig. prin- 

 cipal.] 

 providencensis. Cox, 1857, (Pecten pro- 

 videncensis) Geo. Sur. Ky., vol. 3, 

 Coal Meas. [Ety. proper name.] 

 rectilaterarius. Cox, 1857, (A.vicula rec- 

 talaterarea) Geo. Sur. Ky., vol. 3, 

 Coal Meas. [Sig. straight-sided.] 

 reticulatus, Dawson, 1868, Acad. Geol., 



Carboniferous. [Sig. reticulated.] 

 ringens, Swallow, 1858, (Pecten ringens) 

 Trans. St. Louis Acad. Sci., Permian 

 Gr. [Sig. gaping.] 

 rug{?estriatus, Hall, 1843, (Lima rugse- 

 striata) Geo. Rep. 4th Dist. N. Y., 

 Chemung Gr. [Sig. having wrinkled 

 striae.] 

 sanduskyenm, syn. for Aviculopecten par- 



ilis. 

 gignatus, Hall, 1843, (Avicula signata) 

 Geo. Rep. 4th Dist. N. Y., Chemung 

 Gr. [Sig. marked.] 

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

 boniferous. [Sig. simple.] 

 striatus, Hall, 1843, (Pecten striatus) Geo. 

 Rep. 4th Dist. N. Y., Chemung Gr. 

 [Sig. striated.] 

 suborbicularis. Hall, 1843, (Pterinea sub- 

 orbicularisj Geo. Rep. 4th Dist. N. Y., 

 Chemung Gr. [Sig. somewhat orbic- 

 ular.] 

 subrectus,Conrad, 1 841, ( Avicula subrecta) 

 Ann. Rep. N. Y., Coralline limestone. 

 [Sig. somewhat-straight.] 

 tenuicostus, Winchell, 1863, Proc. Acad. 

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

 ribbed.] 

 undulatus. Hall, 1877, Pal. N. Y., vol. 5, 



Ham. Gr. [Sig. wavy.] 

 unionensis, Worthen, 1875, Geo. Sur. 111., 

 vol. 6, Corniferous Gr. [Ety. proper 

 name.] 



utahensis. Meek, 1860, (Pecten utahensis) 

 Proc. Acad. Nat. Sci., Coal Meas. 

 [Ety. proper name.] 

 whitei. Meek, 1872, Pal. E. Neb., Coal 



Meas. [Ety. proper name.] 

 williamsi. Meek, 1871, Proc. Acad. Nat. 

 Sci., Chouteau limestone. [Ety. 

 proper name.] 

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

 Waverly Gr. [Ety. proper name.] 

 AvicuLOPiNNA, Meek, 1867, Am. Jour. Sci., 

 vol. 44. [Ety. from the resemblance 

 to the genera Avicula and Pinna.'\ 

 americana. Meek, 1867, Am. Jour. Sci., 

 vol. 44, Coal Meas. [Ety. proper 

 name.] 

 AxiNus, Sowerby, 1821, Min. Conch., vol. 3. 

 [Ety. accine, battle-axe.] This genus 

 is unknown in palaeozoic rocks. 

 ovatm, see Schizodus ovatus. 

 securis, Shumard, 1859, Trans. St. Louis 

 Acad. Sci., Permian Gr. [Sig. axe or 

 hatchet-shaped.] 

 Bakevellia, King, 1849, Perm. Foss. [Ety. 

 proper name.] 

 antiqua, Munster, 1826, (Avicula antiqua) 

 Goldfuss Germ. Petref. Not American, 

 parva, Meek & Hayden, 1858, Trans. Alb. 

 Inst., vol. 4, Permian Gr. [Sig. small.] 

 (?) pulchra, Swallow, 1858, Trans. St. 

 Louis x^cad. Sci., Permian Gr. [Sig. 

 beautiful.] 

 £)arbonarca, Meek & Worthen, 1870, Proc. 

 Acad. Nat. Sci. Phil. [Ety. carbo, 

 coal; Area, a genus of shells; from 

 the minute teeth on the cardinal mar- 

 gin, as in Area.'] 

 . gibbosa, Meek & Worthen, 1870, Proc. 

 Acad. Nat. Sci. Phil., Coal Meas. [Sig. 

 gibboi!rs.] 

 Cardinia, Agassiz, 1838, in Societ. Basil. 

 [Ety. cardo, the hinge of a door.] 

 aequimarginalis, Winchell, 1862, Proc. 

 Acad. Nat. Sci., Marshall Gr. [Sig. 

 equal-margined.] 

 antigonesensis, Dawson, 1868, Acad. Geo., 



Carb. [Ety. proper name.] 

 complanata, Winchell, 1862, Proc. Acad. 

 Nat. Sci., Portage Gr. [Sig. smoothed.] 

 concentrica, Winchell, 1862, Proc. Acad. 

 Nat. Sci., Marshall Gr. [Sig. con- 

 centric] 

 cordata, Swallow, 1858, Trans. St. Louis 

 Acad. Sci., Permian Gr. [Sig. heart- 

 like.] 

 (?) fragilis. Cox, 1857, Geo. Sur. Ky., vol. 

 3, Coal Meas. [Sig. frail, easily 

 broken.] 

 occidentalis. Swallow, 1860, Trans. St. 

 Louis Acad. Sci., Chemung Gr. [Sig. 

 western.] 

 subangulata. Swallow, 1858, Trans. St. 

 Louis Acad. Sci., Permian Gr. [Sig. 

 somewhat angular.] 

 subangulata, Dawson, 1868, Acad. Geol 

 This name was preoccupied. 



