470 



LAMELLIBRANCHIATA. 



[CAR. — CH4. 



oblonga, see Protomya oblonga. 



ovata, see Dexiobia ovata, 



parvirostris, White, 1862, Proc. Bost. Soc. 

 Nat. Hist., vol. 8, p. 31, syn. for Dexio- 

 bia ovata. 



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

 St. Mus. Nat. Hist., p. 16, and Geo. Sur. 

 111., vol. 8, p. 126, St. Louis Gr. 



radiata, see Cardiopsis radiata. 



rhomboidea, Hall, see Cardiomorpha sub- 

 rhomboidea. 



rhomboidea, Swallow, 1858, Trans. St. 

 Louis Acad. Sci., vol. 1, p. 191, Per- 

 mian Gr. 



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

 63, figs. 17-20, refer figs. 18 and 19 to 

 Paracyclas rotunda, fig. 17 to Schizodus 

 degener, and fig. 20 to S. patulus. 



Bubglobosa, Meek, 1875, Ohio Pal., vol. 2, 

 p. 304, Waverly Gr. 



suborbicularis, Hall, 1843, (TJngulina sub- 

 orbicularis,) Geo. Rep. 4th Dist. N. Y., 

 p. 244, and Pal. N. Y., vol. 5, pi. 63, figs. 

 9-10, Portage < i r. 



subrhomboidea, Hall, 1877, 1st Ed. Am. 

 Pal. Fobs., p. 186, (proposed instead 

 of Cypricardites rhomboidea, in Geo. 

 Rep. Iowa, p. 523, which was preoccu- 

 pied,) Kinderhook Gr. 



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

 63, figs. 11-15, Chemung Gr. 



triangulata, Swallow, 1860, Trans. St. 

 Louia Acad. Sci., vol. 1, p. 655, Waverly 

 or Choteau Gr. 



trigonalis, Winchell, 1863, Proc. Acad. 

 Nat. Sci., p. 15, Marshall Gt. 



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

 pi. 63, fig. 16, Portage Gr. 



(?) vetwta, see Cypricardites vetustus. 



vindobonensis, Hartt, 1868, Acad. Geol., 

 p. 304, Carboniferous. 



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

 63, fig. 5, Ham. Gr. 

 Cardiopsis, Meek & Worthen, 1861, Proc. 

 Acad. Nat. Sci. Phil., p. 144. [Ety. 

 kardia, the heart; opsis, appearance.] 

 Equivalve, somewhat inequilateral, ob- 

 lique, ovate or cordiform, entirely 

 closed; beaks elevated, incurved, di- 

 rected anteriorly ; cardinal margin 

 short; rounding into the posterior bor- 

 der ; two anterior teeth in each valve ; 

 surface radiated. Type C. radiata. 



crassicostata, Hall & Whitfield, 1873, 24th 

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

 Schoharie grit and Corniferous lime- 

 stone. 



crenistriata, see Pterinea crenistriata. 



jejuna, Winchell, 1862, Proc. Acad. Nat. 

 Sci., p. 417, Marshall Gr. 



megambonata, Winchell, 1862, Proc. Acad. 

 Nat. Sci., p. 417, Marshall Gr. 



parvirostris, White, 1862, Proc. Bost. Soc. 

 Nat. Hist., vol. 9, p. 31, syn. for Dexi- 

 obia ovata. 



radiata, Meek & Worthen, I860, (Cardi- 

 omorpha radiata,) Proc. Acad. Nat. Sci. 

 Phil., p. 458, and Geo. Sur. 111., vol. 2, 

 p. 157, Kinderhook Gr. 



Cardium, Linnpeus, 1758, Syst. Nat., 10th Ed. 



[Ety. kardia, the heart.] Not a Pakeo- 



zoic genus. 

 ioiremis, see Cypricardites iowensis. 

 lexingtonensit, Swallow, 1858, Trans. St. 



Louis Acad. Sci., vol. 1, p. 207, Mid. 



Coal Meas. 

 nautiUndes, Castelnau, 1843, Syst. Sil. 



Seneca Lake, N. Y. Not recognized. 

 vetustum, see Prsecardium vetustum. 



Ch iGNOC AR- 



dia, Meek 

 & Wor- 

 then, 1869, 

 Proc: 

 A cad. Nat. 

 Sci., p. 

 170. [Ety. 

 chaino, to 

 gape; kar- 

 dia, the 

 h e art . ] 

 Ovate, 

 ventri- 

 cose, gap- 

 ing an- 

 terior ly, 

 edge trun- 

 c a t e d , 

 hinge- 



line short, beaks small, incurved ; sur- 

 face concentrically marked. Type C. 

 ovata. 

 ovata, Meek & Worthen, 1869, Proc. 

 Acad. Nat. Sci. Phil., p. 170, and Geo. 

 Sur. 111., vol. 5, p. 586, Coal Meas. 

 ChjEnomya, Meek, 1864, Pal. of Up. Mo., p. 

 42. [Ety. chaino, to open or gape ; 

 Mya, a genus of shells.] Shell thin, 

 equivalve, longitudinally oblong, sub- 

 cylindrical ; anterior side rounded, 

 closed ; posterior side long, truncated, 

 gaping at the extremity ; surface granu- 

 lose and concentrically marked ; cardi- 

 nal margin inflected as in Allorisma ; 

 ligament external; hinge edentulous; 

 posterior muscular impressions near 

 the posterior extremity of the dorsal 

 margin; scars of the anterior adductor 

 and pedal muscles connected; pallial 

 line with a broad shallow sinus. Type 

 C. leavenworthensis. 



Fig. 791.— Chaiuocardia ovata. 



Fig. 792.— Cheenomya maria. Right valve. 



cooperi, Meek & Hayden, 1858, (Panopasa 

 cooperi,) Trans. Alb. Inst., vol.4, p. 83, 

 and Pal. Up. Mo., p. 44, Coal Meas. 



hybrida, see Allorisma hybridum. 



