LAMELLIBRANCHIATA. 



201 



pallasi, as identified by Geinitz, is P. 



oblongus. 

 permianus, Swallow, 1858, Trans. St. Louis 

 Acad. Sci., Permian Gr. [Ety. proper 

 name.] 

 quadricostatus, Dawson, 18G8, Acad. Geo., 



Carboniferous. [Sig. four-ribbed.] 

 simplus, as identified by Geinitz, is P. 



subcuneatus. 

 subcostatus, Meek & Worthen, 1865, Proc. 

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

 [Sig. somewhat costated.] 

 subcuneatus, Meek & Harden, 1858,Trans. 



Alb. Inst., vol. 4, Permian Gr. [Sig. 



somewhat wedge-shaped.] 

 (?) subellipticus, Meek, 1867, Am. Jour. 



Sci., vol. 4-i, Coal Meas. [Sig. some- 

 what elliptical.] 

 tropidophorus, Meek, 1875, 'Ohio Pal., vol. 



2, Coal Meas. [Sig. keel- bearing.] 

 Pleurorhynchns, Phillips, syn. for Conocar- 



dium. 

 attenuatus, see Conocardium attenuatum. 

 crassifrons, see Conocardium crassifrons. 

 cuneus, see Conocardium cuneus. 

 trigonalis, see Conocardium trigonale. 

 vomer, see Conocardium vomer. 

 PoeiDONiA, Bronn, 1824, Syst. Urweltlicher 



Konchvlien. [Etv. proper name.] 

 alata, Hall, 1843, Geo. Rep. 4th Dist. N. 



Y., Clinton Gr. [Sig. winged.] 

 aiveQta, see Grammysia alveata. 

 arcuata, see Grammysia arcuata. 

 clathrata, Lea, 1852, Jour. Acad. Nat. 



8d., 2d ser., vol. 2, Coal Meas. [Sig. 



latticed.] 

 distans, Lea, 1852, Jour. Acad. Nat. Sci., 



2d ser., vol. 2, Coal Meas. [Sig. dis- 

 tant.] 

 Urata, see Paracyclas lirata. 

 moorei, Gabb, 1859, Proc. Acad. Nat. Sci., 



Coal Meas. [Ety. proper name.] 

 perstriata, Lea, 1852, Jour. Acad. Nat. 



Sci., Coal Meas. [Sig. closely lined.] 

 Posidonomya, Bronn, 1837, Leth. Geogn. 



[Ety. Poseidon, a proper name ; Mya, 



a genus of shells.] 

 ambigua, Winchell, 1863, Proc. Acad. Nat. 



Sci., Chemung Gr. [Sig. doubtful.] 

 fracta, Meek, 1875, Ohio Pal., vol. 2, Coal 



Meas. [Sig. frail, easily broken.] 

 mesambonata, Winchell, 18 62, Proc. 



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



mesos, middle; ambon, umbone.] 

 rhomboidea. Hall, 1852, Pal. N. Y., vol. 



2, Niagara Gr. [Sig. rhomboidal.] 

 romingeri, Winchell, 1862, Proc. Acad. 



Nat-. Sci., Marshall Gr. [Ety. proper 



name.] 

 striata, Stevens, 1858, Am. Jour. Sci., vol. 



25, Coal Meas. [Sig. striated.] 

 whiteana, Winchell, 1862, Proc. Acad.Nat. 



Sci., Marshall Gr. [Ety. proper name.] 

 Pkomacrus, Meek, 1871. [Ety. pro, forward; 



makros, long.] 

 andrewsi, Meek, 1871, Am. Jour. Conch., 



vol. 7, Waverly Gr. [Ety. proper 



name.] 



missouriensis, see Sanguinolites missouri- 



ensis. 

 nasutus, see Sanguinolites nasutus. 

 Pkothyris, Meek, 1869, Proc. Acad. Nat. 



Sci. Phil. [Ety. pro. forward ; thyris, 



an orifice.] 

 elegans, Meek, 1871, Am. Jour. Conch., 



vol. 7, Coal Meas. [Sig. elegant.] 

 meeki, Winchell, 1875, Ohio Pal., vol. 2, 



Waverly Gr. [Ety. proper name.] 

 Pseudomoxotis, Beyrich, 1862, Zeit. der 



Deutsch., Geol. Gesselsch., vol. 14. 



[Ety. pseucbs, false; Monotis, a genus 



of shells.] 

 curta, Hall, 1852, (Avicula custa, a typo- 

 graphical error) Stansbury'sEx. Ex. to 



Gt.Salt Lake, Coal Meas. [Sig. short.] 

 hawni, Meek & Hayden, 1858, (Monotis 



hawni) Trans. Alb. Inst., vol. 4, Up. 



Coal Meas. [Ety. proper name.] 

 hawni var. ovata, Meek & Hayden, 1865, 



(Eumicrotis hawni var. ovata) Pal. 



Up. Mo., Permian Gr. [Sig. ovate.] 

 hawni var. sinuata, Meek & Worthen, 



1866, (Eumicrotis hawni var. sinuata) 



Geo. Sur. 111., vol. 2, Up. Coal Meas. 



[Sig. sinuated.] 

 radialis, (?) Phillips, 1834, (Pecten radi- 



alis) Encyc. Meth., vol. 4, Coal Meas. 



[Sig. radiated.] 

 Ptekixea, Goldfuss, 1826, Germ. Petref. 



[Ety. pteron, a wing.] 

 appressa, Conrad, 1838, Ann. Rep. N. Y., 



Ham. Gr. [Sig. pressed together.] 

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



Chemung Gr. [Sig. sandy.] 

 bellilineata, Billings, 1866, Catal. Sil. Foss. 



Antic. Hud. Riv. Gr. [Sig. beautifully 



lined.] 

 bisulcata, see Grammysia bisulcata. 

 brisa, Hall, 1867, 20th Reg. Rep. N. Y., 



Niagara Gr. [Sig. pressed.] 

 boydi, Conrad, 1842, (Avicula boydi) 



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



Ham. Gr. [Ety. proper name.] 

 cardiiformis, see Megambonia cardiiformis. 

 cardinata, Winchell, 1862, Proc. Acad. 



Nat. Sci., Marshall Gr. [Sig. hinged.] 

 carinata, Goldfuss, see Ambonychia cari- 



nata. 

 chemungensis, Conrad, 1842, (Avicula 



chemungensis) Jour. Acad. Nat. Sci., 



vol. 8, Chemung Gr. [Ety. proper 



name.] 

 concentrica, Conrad, 1838, Ann. Rep. N. 



Y., Ham. Gr. [Sig. concentrically 



lined.] 

 cuneata, see Sanguinolites cuneatus. 

 curiosa, Billings, 1866, Catal. Sil. Foss. 



Antic, Anticosti Gr. [Sig. curious.] 



cyrtodontoides, Winchell & Marcy, 1865, 



Mem. Bost. Soc. Nat. Hist., Niagara 



Gr. [Sig. like a shell of the genus 



Cyrtodonta.] 

 flabellum, Conrad, 1842, (Avicula flabella) 

 Jour. Acad. Nat. Sci., vol. 8, Up. Held, 

 and Ham. Gr. [Sig. a little fan.] 



