200 



LAMELLIBRANCHIATA. 



elliptica var. occidentalis, Hall, 1872, 24th 

 Reg. Rep., Up. Held. Gr. [Sig 

 western.] 



lirata, Conrad, 1838, (Posidonia lirata) 

 Ann. Rep. N. Y., Corniferous Gr 

 [Sig. furrowed.] 



ohioensis, Meek, 1871, Proc. Acad. Nat 

 Sci. Phil., Cornif. Gr. [Ety. proper 

 name.] 



sabini, White, 1876, Proc. Acad. Nat. Sci., 

 Devonian. [Ety. proper name.] 

 Pectcn, Mueller, 1776. This genus is un- 

 known in the Palaeozoic rocks. 



acxdialatus, see Aviculopecten acutialatus. 



armigerus, see A. armigerus. 



aviculatm, see A. aviculatus. 



broadfieadi, syn. for Aviculopecten car- 

 bon if er us. 



cancdlatus, see Aviculopecten cancellatus. 



carboniferus, see A. carboniferus. 



clevelartdicus, see A. clevelandicus. 



cohradoensis, see A. coloradoensis. 



convexus, see A. convexus. 



crenulatus, see Pernopecten crenulatus. 



dolabriformis, see Aviculopecten dolabri- 

 formis. 



duplicatus, see A. duplicatus. 



hatti, see A. halli. 



havmi, syn. for A. carboniferus. 



missouriensis, see A. missouriensis. 



neglectus, see A. neglectus. 



occidentalis, see A. occidentalis. 



providencensis, see A. providencensis. 



radialis, see Pseudomonotis radialis. 



ringens, see Aviculopecten ringens. 



striatus, see A. striatus. [ata. 



tenuilineatus, see Streblopteria tenuiline- 



utahensis, see Aviculopecten utahensis. 

 Pernopecten, Winchell, 1865, Proc. Acad. 

 Nat. Sci. Phil. [Ety. from the shells 

 Perna and Pecten.] 



crenulatus, Hall, 1843, (Pecten crenula- 

 tus) Geo. Rep. 4th Dist. N. Y., Che- 

 mung Gr. [Sig. crenulated.] 



fasciculatus, Hall, 1877, Pal. N. Y., vol. 

 5, Chemung Gr. [Sig. fasciculated.] 



glaber, Hall, 1843, (Lima glaber) Geo. 

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

 [Sig. smooth.] 



limiformis, White & Whitfield, 1862, 

 (Aviculopecten limaformis) Proc. 

 Bost. Soc. Nat. Hist., vol. 8, St. Louis 

 Gr. [Sig. like a shell of the genus 

 Lima."] 



limatus, Winchell, 1865, Proc. Acad. Nat. 

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



obsoletus, Hall, 1843, (Lima obsoleta) 

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

 Gr. [Sig. obsolete.] 



shumardanus, Winchell, 1865, Proc. 

 Acad. Nat. Sci. Phil., Kinderhook 

 Gr. [Ety. proper name.] 

 Pholadella, Hall, 1870, Prelim. Notice 

 Lam. shells. [Ety. diminutive of the 

 recent genus Photos.] 



cuneata, Hall, 1870, Prelim. Notice Lam. 

 shells, Kinderhook Gr. [Sig. wedge- 

 shaped.] 



newberryi, Hall, 1870, Prelim. Notice 



Lam. shells, WaverlyGr. [Ety. proper 



name.] 

 ornata, Hall, 1870, Prelim. Notice Lam. 



shells, Chemung Gr. [Sig. orna- 

 mented.] 

 radiata, Conrad, 1842, (Nuculites radiata) 



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



Gr. [Sig. radiated.] 

 truncata, Hall, 1870, Prelim. Notice Lam. 



shells, Ham. Gr. [Sig. truncated.] 

 Phthonia, Hall, 1870, Prelim. Notice Lam. 



shells, 

 nodicostata, Hall, 1870, Prelim. Notice 



Lam. shells, Ham. Gr. [Sig. from the 



nodes on the costa;.] 

 sectifrons, Conrad, 1842, (Cypricardites 



sectifrons) Jour. Acad. Nat. Sci., Ham. 



Gr. [Sig. having a divided front.] 

 Pinna, Linmeus, 1758, Syst. Nat, 10th Ed. 



[Ety. pinna, a feather.] 

 adamsi, syn. for Pinna peracuta. 

 binrichsana, White & St. John, 1868, 



Trans. Chi. Acad. Sci., St. Louis Gr. 



[Ety. proper name.] 

 marshallensis, Winchell, 1865, Proc.Acad. 



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



name.] 

 missouriensis, Swallow, 1863, Trans. St. 



Louis Acad. Sci., Low. Carb. [Ety. 



proper name.] 

 peracuta, Shumard, 1858, Trans. St.Louis 



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



acute.] 

 subspatulata, Worthen, 1875, Geo. Sur. 



111., vol. 6, Warsaw Gr. [Sig. some- 

 what spatulate or blade-shaped.] 

 Pinnopsis, syn. for Lunulacardium. 



acutirostra, see Lunulacardium acutirost- 



rum. 

 ornatus, see Lunulacardium ornatum. 

 Placunopsis, Morris & Lycett, 1853, Monogr. 



Foss. Great Oolite. [Ety. Placuna, a 



genus of shells; opsk, resemblance.] 

 carbonaria, Meek & Worthen, 1866, Proc. 



Chi. Acad. Sci., vol. 1, Up. Coal Meas. 



[Sig. pertaining to coal.] 

 recticardinalis, Meek, 1875, Ohio Pal., 



vol. 2, Coal Meas. [Sig. straight on 



the cardinal line.] 

 Pleurophorus, King, 1844, Ann. Mag. Nat. 



Hist., vol. 14. [Ety. pleuron, a rib ; 



phoros, bearing.] 

 angulatus, Meek & Worthen, 1865, Proc. 



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



angulated.] 

 calhouni, Meek & Hayden, 1858, (Ed- 



monia calhouni) Trans. Alb. Inst., 



vol. 4, Permian Gr. [Ety. proper 



name.] 

 costatiformis, Meek & Worthen, 1865, 



Proc. Acad. Nat. Sci. Phil., Keokuk 



Gr. [Sig. like P. costatus.] 

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



Meas. [Sig. oblong.] 

 occidentalis, Meek & Hayden, 1862, Trans. 



Alb. Inst., vol. 4, Coal Meas. [Sig. 



western.] 



