196 



LAMELLIBRANCHIATA. 



angustata, Vanuxem, 1842, (Cypricardites 



angustata) Geo. Rep. N. Y., Catskill 



Gr. [Sig. narrowed.] 

 catskillensis, Vanuxem, 1842, (Cypricar- 

 dites catskillensis) Geo. Rep. N. Y., 



Catskill Gr. [Ety. proper name.] 

 complanata, Hall, 1870, Prelim. Notice 

 . Lam. shells, Up. Held. Gr. [Sig. 



smooth.] 

 concentrica, Conrad, 1838, (Cypricardites 



concentrica) Geo. Rep. 4th Dist. N. 



Y., Ham. Gr. [Sig. marked with con- 

 centric lines.] 

 cymbula. Hall, 1870, Prelim. Notice Lam. 



shells. Ham. Gr. [Sig. a small boat.] 

 hyalea, Hall, 1870, Prelim. Notice Lam. 



shells, Waverly Gr. [Ety. proper 



name.] 

 inornata, Billings, 1874, Pal. Foss., vol. 



2, Devonian. [Sig. unadorned.] 

 macilenta. Hall, 1870, Prelim. Notice 



Lam. shells. Ham. Gr. [Sig. lean, 



meager.] 

 perovata. Meek & Worthen, 1865, (Modi- 



olopsis perovata) Proc. Acad. Nat. Sci. 



Phil., Ham. Gr. [Sig. very ovate.] 

 planulata, Hall, 1870, Prelim. Notice 



Lam. shells. Ham. Gr. [Sig. flattened.] 

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



Up. Held. Gr. [Sig. large.] 

 quadrula. Hall, 1870, Prelim. Notice 



Lam. shells, Chemung Gr. [Sig. a 



small square.] 

 subalata, Conrad, 1841, (Cypricardites 



subalata) Ann. Rep. N. Y., Ham. Gr. 



[Sig. somewhat winged.] 

 MoNOPTERiA, Meek & Worthen, 1866, Proc. 



Chi. Acad. Nat. Sci., vol. 1. [Ety. 



monos, single ; pteron, a wing. ] 

 gibbosa. Meek & Worthen, 1866, Proc. 



Chi. Acad. Sci., Coal Meas. [Sig. gib- 

 bous, tumid.] 

 longispina. Cox, 1857, (Gervillia longi- 



spina) Geo. Sur. Ky., vol. 3, Coal 



Meas. [Sig. long-spined.] 

 marian. White, 1874, Rep. Invert. Foss., 



Carboniferous. [Ety. proper name.] 

 MoNOTis, Bronn, 1824, System Urweltlicher 



Konchylien. [Ety. monos, one; ous- 



oto8, ear.] 

 elevata, Conrad, 1848, Proc. Acad. Nat. 



Sci., vol. 3, Chemung Gr. [Sig. 



elevated.] 

 gregaria. Meek & Worthen, 1870, Proc. 



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



[Sig. clustered together, found in 



flocks.] 

 halli. Swallow, 1858, Trans. St. Tx)uis 



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



name.] 

 hawni, see Eumicrotis hawni. 

 poulsoni, Conrad, 1848, Proc. Acad. Nat. 



Sci., vol. 3, Chemung Gr. [Ety. proper 



name.] 

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



Ham. Gr. [Sig. primitive, original.] 



radialis, Phillips, 1834, (Pecten radialis) 



Permian Gr. See Pseudomonotis 



radialis. 

 radians, Conrad, 1842, (Pterinea radians) 



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



[Sig. radiating.] 

 speluncaria, Schlotheim, 1816, (Gryphites 



speluncarius) Permian Gr. [Sig. like 



a cave, den, or hole in a rock.] 

 variabilis. Swallow, 1858, Trans. St. Louis 



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

 ble, changing.] 

 Myalina, Koninck, 1844, Desc. Anim. Foss. 



Carb. Belg. [Ety. Mya, sl genus of 



shells ; inus, like.] 

 angulata. Meek & Worthen, 1860, Proc. 



Acad. Nat. Sci. Phil., Chester Gr. [Sig. 



angulated.] 

 apachei, M a r c o u , 1858, Geol. North 



America, Carboniferous. [Ety. proper 



name.] 

 aviculoides. Meek & Hayden, 1860, Proc. 



Acad. Nat. Sci. Phil., Permian Gr. 



[Sig. like an Avicula.'] 

 aviculoides, Winchell, 1862. This name 



was preoccupied, 

 concentrica. Meek & Worthen, 1860, Proc. 



Acad. Nat. Sci. Phil., St. Louis Gr. 



[Sig. having concentric lines.] 

 deltoidea, Gabb, 1859, Proc. Acad. Nat. 



Sci. Phil., Low. Carb. [Sig. like the 



Greek letter Delta.l 



imbricaria, Winchell, 1862, Proc. Acad. 



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

 cated.] 

 iowensis, Winchell, 1865, Proc. Acad. 



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



name.] 

 kansasensis, Shumard, 1858, Trans. St. 



Louis Acad. Sci., Coal Meas. [Ety. 



proper name.] 

 keokuk, Worthen, 1875, Geo. Sur. 111., vol. 



6, Keokuk Gr. [Ety. proper name.] 

 meliniformis. Meek & AVorthen, 1866, 



Proc. Chi. Acad. Sci., Coal Meas. [Sig. 



in the form of a purse.] 

 michiganensis, Winchell, 18 6 2, Proc. 



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



proper name.] 

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



2, Clinton Gr. [Sig. like a Mytilus.'] 

 perattenuata. Meek & Hayden, 18 62, 



Trans. Alb. Inst., vol. 4. Coal Meas. 



[Sig. very much drawn out, attenu- 

 ated.] 

 permiana. Swallow, 1858, (Mytilus per- 



mianus) Trans. St. Louis Acad. Sci., 



Permian Gr. [Ety. proper name.] 

 perniformis, Cox, 1857, Geo. Sur. Ky., 



vol. 3, Coal Meas. [Sig. in the form 



of a Penia.1 

 pterineaiformis, Winchell, 1862, Proc. 



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



in the form of a Pterinea.'] 

 recta, Shumard, 1858, Trans. St. Louis 



Acad. Sci., Permian Gr. [Sig. straight.] 



