EDM.] 



LAMELLIBRANCHIA TA. 



479 



name.] Shell equivalve, inequilateral, 

 tumid, short, oblong or rounded, closed 

 all around; dorsal and ventral margins 

 slightly convex ; beaks tumid, with an 

 impressed lunette between them; sur- 

 face with concentric strise ; no teeth, but 

 an internal lamellar cartilage support, 

 much dilated within the cavity of the 

 beaks, the broad end forming the slits 

 in casts coinciding with the edges of the 

 anterior lunette, and the posterior end 

 running nearly parallel to and close 

 within the hinge-line ; dorsal margins 

 erect and simple ; two simple adductor 

 impressions, often with an accessory 

 impression over each, pallia! scar sim- 

 ple, entire. Type E. unioniformis. 



gequimargin- 

 alis, Win- 

 chell,1862, 

 (Cardin i a 

 sequim a r- 

 ginalis, ) 

 P r o c . 

 Acad. Nat. 

 Sci.,p.413, 

 Marshall 

 Gr. 



an om a la , 

 Daw son, 



1868, Acad. Geo., p. 303, Garb. 

 aspenwallensis, Meek, 1871, Hayden's 

 Rep. Sur. Wyoming, p. 299, and Pal. E. 

 Neb., p. 216, Coal Meas. 

 bicarinata, Winchell, 1863, Proc. Acad. 

 Nat. Sci., p. 13, Marshall Gr. Prof. Hall 

 regards this as a syn. for Sanguinolites 

 rigidus. 



binumbonata, Winchell, 

 1862, Proc. Acad. Nat. 

 Sci., p. 414, Marshall Gr. 

 burlingtonensis, White & 

 Whitfield, 1862, Proc. 

 Bost. Soc. Nat. Hist., vol. 

 8, p. 301, and Pal. N. Y., f 

 vol. 5, p. 390, Kinder- ' 

 hook Gr. 

 calhouni, see Pleurophorus 



calhouni. 



circularis, Walcott, 1885, 

 Monogr. U. S. Geo. Sur., 

 vol. 8, p. 246, Carbonif- FIG. 820. - Ed- 



" 



FIG. 819. Edmondia aspenwall- 

 ensis. Kight valve. 



concentrica, see Astartella Cardinal view! 



concentrica. 

 depressa, Hall, 1870, Prelim. Notice Lam. 



Shells, p. 91, and Pal. N. Y., vol. 5, pi. 



64, fig. 32, Waverly Gr. 

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



392, Waverly Gr. 

 elliptica, Winchell, 1863, Proc. Acad. Nat. 



Sci., p. 13, Marshall Gr. 

 gibbosa, Swallow, 1858, Trans. St. Louis 



Acad. Sci., vol. 1, p. 189, Permian Gr. 

 glabra, Meek, 1872, Pal. E. Neb. p. 214, 



Coal Meas. 

 hartti, Dawson, 1868, Acad. Geol., p. 303, 



Garb. 



hawni, Swallow, 1858, Trans. St. Louis 



Acad. Sci., vol. 1, p. 209, Coal Meas. 

 illinoisensis, Wortben, 1884, Bull. No. 2 



111. St. Mus. Nat. Hist., p. 18, and Geo. 



p. 122, Ke 

 ledoides, Winchell, 1866, Rep. Low. Pen- 



Sur. 111., vol. 8, p. 122, Keokuk Gr. 



insula Mich., p. 96, Ham. Gr. 

 mactroides, Winchell, 1866, Rep. Low. 



Peninsula Mich., p. 96, Ham. Gr. 

 marionensis, Swallow, 1860, Trans. St. 



Louis Acad. Sci., vol. 1, p. 654, Cho- 



teau Gr. 

 medon, Walcott, 1884, Monogr. TJ. S. Geo. 



Sur., vol. 8, p. 245, Subcarboniferous. 

 mortonensis, Geinitz, 1866, (Astarte mor- 



tonensis,) Carb. und Dyas in Neb., p. 17, 



Coal Meas. 

 nebraskensis, Geinitz, 1866, (Astarte ne- 



braskensis,)Carb. und Dyas in Neb., p 16, 



and Pal. E. Neb., p. 214, Coal Meas. 

 nilesi, Winchell & Marcy, 1865, Proc. 



Bost. Soc. Nat. Hist., p. 97, Niagara Gr. 

 nitida, Winchell, 1863, Proc. Acad. Nat. 



Sci., p. 12, Marshall Gr. 

 nuptialis, Winchell, 1863, Proc. Acad. Nat. 



Sci., p. 12, Marshall Gr. 

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



38, Chemung Gr. 

 otoensis, Swallow, 1858, Trans. St. Louis 



Acad. Sci., vol. 1, p. 189, Permian Gr. 

 peroblonga, Meek & Worthen, 1866, Proc. 



Acad. Nat. Sci. Phil., p. 249, and Geo. 



Sur. 111., vol. 5, p. 583, Coal Meas. 

 philipi, Hall, 1870, Prelim. Notice Lam. 



Shells, p. 90, and Pal. N. Y., vol. 5, pi. 



64, figs. 9-18, Chemung Gr. 

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



40th parallel, vol. 4, p. 46, Devonian. 

 radiata. see Clinopistha radiata. 

 reflexa, Meek, 1872, Pal. E. Neb., p. 213, 



Coal Meas. 

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



pi. 64, figs. 7-8, Chemung Gr. 

 semiorbiculata, Swallow, 1858, Trans. St. 



Louis Acad. Sci., vol. 1, p. 190, Per- 



mian Gr. 

 strigillata, Winchell, 1863, Proc. Acad. Nat. 



Sci., p. 12, Marshall Gr. 

 subangulata, see Cypricardites subangu- 



latus. 

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



pi. 64, fig. 31, Chemung Gr. 

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



pi. 64, figs. 5-6, Chemung Gr. 

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



389, Chemung Gr. 

 subplana, Hall, 1858, Cypricardia sub- 



plana,) Trans. Alb. Inst., vol. 4, p. 19, 



and Bull, Am. Mus. Nat, Hist., p. 66, 



Warsaw Gr. 



subtruncata, see Cuneamya subtruncata. 

 subtruncata, Meek, 1872, Pal. E. Neb., p. 



215, Coal Meas. 

 tapetiformis, Meek, 1875, (E. tapesiformis,) 



Ohio Pal., vol. 2, p. 304, Waverly Gr. 

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



p. 393, Chemung Gr. 

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



p. 389, Chemung Gr. 



