AVI.] 



LAMELLIBRANCHIA TA. 



465 



subrugosa, D'Orbigny, 1850, Prodr. d. Pal- 

 eon t, t. 1, p. 33. Syn. for Pterinea 

 rugosa. 



tenuilamellata, Hall, 1859, Pal. N. Y., 

 vol. 3, p. 281, Low. Held. Gr. 



textilis, Hall, 1859, Pal. N. Y., vol. 3, p. 

 288, Low. Held. Gr. 



textilis var. arenaria, Hall, 1859, Pal. 

 N. Y, vol. 3, p. 465, Oriskany Gr. 



trentonemis, see Pterinea trentonensis. 



tricortala, see Lyriopecten tricostatus. 



trilobata, Conrad, 1842, Jour. Acad. Nat. 

 Sci., vol. 8, p. 240, Ham. Gr. 



triplistriata, Stevens, 1858, Am. Jour. Sci., 

 vol. 25, p. 265. Coal Meas. 



triquetra, Hall, 1843, Geo. Rep. N. Y., p. 

 137, Onondaga Gr. 



tuberculata, Conrad, 1838, Ann. Rep. 

 N. Y., p. 117, Corniferous Gr. 



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

 p. 284, Low. Held. Gr. 



undata, Hall, 1852, Pal. N. Y., vol. 2, p. 

 283, Niagara Gr. 



undosa, Ringueberg, 1886, Bull. Buf. 

 Soc. Nat. Sci., vol. 5, p. 18, Niag- 

 ara Gr. 



welchi, James, 1874, Cin. Quar. Jour. Sci., 

 vol. 1, p. 239, Hud. Riv. Gr. 



whitii, Winchell, 1863, Proc. Acad. Nat. 

 Sci., p. 8, Marshall Gr. 

 Aviculopecten, McCoy, 1851, Ann. Mag. 

 Nat. Hist., 2d ser., vol. 7, p. 171. [Ety. 

 from the genera Avicula and Pecten.] 

 Inequivalve, inequilateral ; straight or 

 slightly extended obliquely toward the 

 posteiior side ; anterior ear flattened, 

 smaller than the posterior, sharply and 

 deeply defined, with a notch in the 

 right valve between it and the body of 

 the shell for the passage of the byssus ; 

 posterior ear pointed, extending about 

 as far as the margin of the shell, de- 

 fined or not; ligament confined to a 

 narrow facet along the hinge margin, 

 or having a wider cardinal area with 

 cartilage furrows ; no medial cartilage 

 pit; muscular impression and pallial 

 soar as in Pecten. Type A. docens. 



acadicus, Hartt, 1868, Acad. Geol., p. 307, 

 Carb. 



acutialatus, Swallow, 1858, (Avicula acu- 

 tialata,) Trans. St. Louis Acad. Sci., p. 

 185, Permian Gr. 



sequilateralis, Hall, 1883, Pal. N. Y., vol. 

 5, pt. 1, p. 19, Chemung Gr. 



eequilaterus, Hall, 1843. (Avicula sequila- 

 tera,) Geo. Rep. 4th Dist. N. Y., p. 181, 

 Up. Held. Gr. and Marcellus Shale. 



affinis, Walcott, 1885, Monogr. U. S. Geo. 

 Sur., vol. 8, p. 229, Subcarboniferous. 



amplus. Meek & Worthen, 1860, Proc. 

 Acad. Nat. Sci. Phil., p. 454, and Geo. 

 •Sur. 111., vol. 2, p. 257, Keokuk Gr. 



armigerus, Conrad, 1835, (Pecten arinige- 

 rus,) Trans. Geo. Soc. Penn., p. 268, 

 Coal Meas. 



bellus, Conrad, 1841, (Avicula bella,) 

 Ann. Rep. N. Y., p. 54, and Pal. N. Y., 

 vol. 5, pt. 1, p. 35, Ham. Gr. 



burlingtonensis, Meek & Worthen 1860, 



Proc. Acad. Nat. Sci., p.- 453, and Geo. 



Sur. 111., vol. 2, p. 231, Burlington Gr. 

 cancellatus, Hall, 1843, (Pecten cancel- 



latus,) Geo. Rep. 4th Dist. N. Y., p. 



264, and Pal. N. Y., vol. 5, pt. 1, p. 18, 



Chemung Gr. 

 carboniferus, Stevens, 1858, (Pecten car- 



boniferus,) Am. Jour. Sci. and Arts, 



vol. 25, p. 261, and Pal. E. Neb., p. 193, 



Coal Meas. 

 caroli, Winchell, 1863, Proc. Acad. Nat. 



Sci., p. 9, and Pal. N. Y., vol. 5, pt. 1, 



p. 29, Waverly Gr. 

 catactus, Meek, 1877, U. S. Geo. Expl. 



40th parallel, vol. 4, p. 93, Carbonif- 

 erous, 

 celsus, Hall, 1883, Pal. N. Y., vol. 5, pt. 1, 



p. 23, Chemung Gr. 

 chesterensis, Worthen, 1884, Bull. No. 2, 



111. St. Mus. Nat. Hist., p. 20, and Geo. 



Sur. 111., vol. 8, p. 115, Kaskaskia Gr. 

 cleon, Hall, 1883, Pal. N. Y., vol. 5, pt. 1, 



p. 6, Up. Held. Gr. 

 clevelandicus, Swallow, 1858, (Pecten 



clevelandicus,) Trans. St. Louis Acad. 



Sci., vol. 1, p. 184, Permian Gr. 

 colletti, Worthen, 1884, Bull. No. 2, 111. 



St. Mus. Nat. Hist, p. 21, and Geo. Sur. 



111., vol. 8, p. 119, Keokuk Gr. 

 coloradoensis, Newberry, 1861, Ives' Col. 



Ex. Exped., p. 129, Coal Meas. 

 convexus, Hall, 1843, (Pecten convexus,) 



Geo. Rep. 4th Dist. N. Y., p. 265, and 



Pal. N. Y., vol. 5, pt. 1, p. 28, Che- 

 mung Gr. 

 cora, Dawson, 1868, Acad. Geol., p. 307, 



Carb. 

 coreyanus, White, 1874, Rep. Invert. 



Foss., p. 21, and Geo. Sur. W. 100th 



Mer., vol. 4, p. 147, Coal Meas. 

 coxanus, Meek & Worthen, 1860, Proc. 



Acad. Nat. Sci. Phil., p. 453, and Geo. 



Sur. 111., vol. 2, p. 326, Low. Coal 



Meas. 

 crassicostatus,Hall & Whitfield, 1872, 24th 



Rep. N. Y. Mus. Nat. Hist., p. 188, Up. 



Held. Gr. 

 crenistriatus, Meek, 1871, Proc. Acad. 



Nat. Sci. Phil., p. 60, and Ohio Pal., vol. 



2, p. 295, Waverly Gr. 

 curticardinalis. Hall & Whitfield, 1877, 



U. S. Geo. Expl. 40th parallel, vol. 4, 



p. 273, Coal Meas. 

 debertanus, Dawson, 1868, Acad. Geol., 



p. 307, Carboniferous, 

 dolabril'ormis, Hall, 1843, (Pecten (?) 



dolabriformis,) Geo. Rep. 4th Dist. 



N. Y., p. 265, and Pal. N. Y., vol. 5, pt. 



1, p. 26, Chemung Gr. 

 duplicatus, Hall, 1843, (Pecten duplicatus,) 



Geo. Rep. 4th Dist. N. Y., p. 26 i, and 



Pal. N. Y., vol. 5, pt. 1, p. 17, Che- 

 mung Gr. 

 edwardsi, Worthen, 1884, Bull. No. 2, 111. 



St. Mus. Nat. Hist., p. 22, and Geo. Sur. 



111., vol. 8, p. 119, Keokuk Gr. 

 ellipticus, Hall, 1883, Pal. N. Y., vol. 5, 



pt. 1, p. 25, Chemung Gr. 



