492 



LAMELLIBRANCHIA TA. 



[MON. MYA. 



cymbula, Hall, 1870, Prelim. Notice Lam. 

 Shells, p. 75, and Pal. N. Y., vol. 5, pi. 



36, figs. 19-20, Ham. Gr. 

 desiderata, Walcott, 1885, Monogr. U. S. 



Geo. Sur., vol. 8, p. 240, Carboniferous, 

 hyalea, Hall, 1870, Prelim. Notice Lam. 



Shells, p. 79, and Pal. N. Y., vol. 5, pi. 



41, figs. 28-30, Waverly Gr. 

 inornata, Billings, 1874, Pal. FOBS., vol. 



2, p. 52, Devonian, 

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



5, pi. 34, figs. 15-17, Up. Held. Gr. 

 macilenta, Hall, 1870, Prelim. Notice Lam. 



Shells, p. 76, and Pal. N. Y., vol. 5, pi. 



37, fig. 17, and pi. 39, figs. 17-21, 

 Ham. Gr. 



mytiloides, Conrad, 1841, (Cypricardites 



mytiloides,) Ann. Rep. Geo. N. Y., p. 52, 



and Pal. N. Y., vol. 5, p. 277, Ham. Gr. 

 neglecta, Hall, 1883, Pal. N. Y., vol. 5, pi. 



41, figs. 12-13, Chemung Gr. 

 oblonga, Walcott, 1885, Monogr. U. S. 



Geo. Sur., vol. 8, p. 170, Devonian, 

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



Sur., vol. 8, p. 171, Devonian, 

 perovata, Meek & Worthen, 1865, (Modi- 



olopsis perovata,) Proc. Acad. Nat. Sci. 



Phil., p. 246, and Geo. Sur. 111., vol. 3, 



p. 438, Ham. Gr. 

 pintoensis, Walcott, 1885, Monogr. U. S. 



Geo. Sur., vol. 8, p. 240, Carboniferous. 

 planuJata, Hall, 1870, Prelim. Notice Lam. 



Shells, p. 74, syn. for M. mytiloides. 

 ponderosa, Hall, 1870, (Sanguinolites pon- 



derosus,) Prelim. Not. Lam. Shells, p. 



35, and Pal. N. Y., vol. 5, pi. 34, fig. 11, 



Up. Held Gr. 

 putillus, Hall, 1883, Pal. N. Y., vol, 5, pi. 



41, figs. 1-2, Schoharie grit, 

 quadrula, Hall, 1870, Prelim. Notice Lam. 



Shells, p. 77, and Pal. N. Y., vol. 5, pi. 



41, figs. 18-26, Chemung Gr. 

 recta, Hall, 1885, Pal. N. Y., vol. 5, p. 286, 



Ham. Gr. 

 recurva, Hall, 1883, Pal. N. Y., vol. 5, pi. 



41, fig. 17, Chemung Gr. 

 regularis, Hall, 1885, Pal. N. Y., vol. 5, p. 



270, Schobarie grit, 

 rigida, Hall, 1883, Pal. N. Y., vol. 5, pi. 41, 



figs. 10, 11, 14-16, Chemung Gr. 

 rigidula, Simpson, 1889, Trans. Am. Phil. 



Soc., p. 449, and Diet. FOBS. Pa., p. 415, 



Chemung Gr. 

 schobarie, Hall, 1884, Pal. N. Y., vol. 5, 



p. 269, pi. 34, fig. 13, Schoharie grit, 

 subalata, Conrad, 1841, Cypricardites 



subalatus,) Ann. Rep. N. Y., p. 83, and 



Pal. N. Y., vol. 5, pi. 39, figs. 1-16, 



Ham. Gr. 

 subalata var. chemungensis, Hall, 1885, 



Pal. N. Y., vol. 5, p. 284, Chemung Gr. 

 subangulata, Hall, 1885, Pal. N. Y., vol. 5, 



p. 287, Chemung Gr. 

 tioga, Hall, 1885, Pal. N. Y., vol. 5, p. 291, 



Chemung Gr. 

 MONOPTERIA, Meek & Worthen, 1866, Proc. 



Chi. Acad. Nat. Sci., vol. 1, p. 20. [Ety. 



monos, single ; pteron, a wing.] Avicu- 



loid, obliquely produced, angular pos- 



FIG. 858. Monopteria 

 gibbosa. 



teriorly, rounded in front, subequivalve, 

 both valves convex ; posterior wing 

 slender, produced, anterior one obsolete 

 or drawn back between the beaks, in a 

 deep lunule; no bysfal emargination, 

 but a little gaping in the lunuie ; mus- 

 cular impressions faint; cardinal area 

 narrow, with few longitudinal cartilage 

 furrows;- hinge edentulous. Type M. 

 longiepina. 



auricula, Stevens, 1858, (Gervillia auric- 

 ula,) Am. Jour. Sci. and Arts, 2d ser., 

 vol. 25, p. 265, Coal Meas. 



gibboea, Meek & 

 Worthen, 1866, 

 Proc. Chi. Acad. 

 Sci., p. 20, Coal 

 Meas. 



longispina, Cox, 

 1857, (Gervillia 

 longispina,) 

 Geo. Sur. Ky., 

 vol. 3, p. 568, 

 Coal Meas. 



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

 p. 22, and Geo. Sur. W. 100th Mer., 

 vol. 4, p. 151, Carboniferous. 

 MONOTIS, Bronn, 1824, System Urweltlicher 

 Konchylien. [Ety. monos, one ; ous, otos, 

 ear.] Obliquely oval, compressed, ra- 

 diated; anterior side short, rounded; 

 posterior slighty" eared. Type M. sa- 

 linaria. 



elevata, see Panenka elevata. 

 gregaria, Meek & Worthen, 

 1870, Proc. Acad. Nat. Sci. 

 Phil., p. 38, and Geo. Sur. 

 111., vol. 5, p. 573, Coal 

 Meas. 



halli, Swallow, 1858, Trans. 

 St. Louis Acad. Sci., vol. 1, 

 p. 185, Permian Gr. 



hawni, see Pseudomonotis hawni. 



pouhoni, see Panenka poulsoni. 



princeps, see Aviculopecten princeps. 



radialis, Phillips, 1834, (Pecten radialis,) 

 see Pseudomonotis radialis. 



radians, see Panenka radians. 



septentrionalis, Haughton, 1857, Jour. 

 Roy. Dub. Soc., vol. 1, (?) Gr. 



speluncaria, Schlotheim, 1816, Denkschrif- 

 ten d. k. Ac. d. Wiss. zu Munchen, p. 

 30, (Gryphites speluncarius,) Permian 

 Gr. Probably not American. 



variabilis, Swallow, 1858, Trans. St. Louis 



Acad. Sci., vol. 1, p. 187, Permian Gr. 

 MYALINA, DeKoninck, 1844, Desc. Anim. 

 Foss. Carb. Belg., p. 125. [Ety. My a, a 

 genus of shells; inus, like.] Subrhom- 

 boidal, inequilateral, inequivalve, ob- 

 lique, slightly sinuous in front for the 

 passage of the byssus; beaks pointed, 

 nearly terminal; surface smootl or con- 

 centrically marked ; hinge edentulous; 

 ligamental area broad and tun-owed 

 parallel to the hinge-line; muscular 

 and pallial impressions apparently as 

 in Fteria; shell structure prismatic. 

 Type M. lamellosa. 



FIG. 859. Mo- 

 n o t i s gre- 

 garia. 



