460 



LAMELLIBRANCHIA TA. 



[AMB. 



latum, Swallow, 1858, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 210, Mid. Coal 

 Meas. 



kavcnworthense, see Chsenomya leaven- 

 worthensis. 



FIG. 768. Allorisma subcuneatum. 



marionense, White, 1876, Proc. Acad. Nat. 

 Sci., p. 31, and Cont. to Pal., No.- 8, p. 

 167, St. Louis Gr. 



maxvillense, Whitfield, 1882, Ann. N. Y. 

 Acad. Sci., vol. 2, p. 222, Kaskaskia Gr. 

 minnehaha, see Chsenomya minnehaha. 

 pleuropistha, Meek, 1871, Proc. Acad. Nat. 

 Sci. Phil., p. 70, and Ohio Pal., vol. 2, 

 p. 309, Waverly Gr. 

 reflexum, Meek, 1872, Pal. E. Neb., p. 217 



Coal Meas. 



sinuatum, McChesney, 1860, New Pal. 

 Foss., p. 56, Chester Gr. 



subcuneatum, 

 Meek & Hayden, 

 1858, Proc. Acad. 

 Nat. Sci. Phil., p. 

 263, and Pal. E. 

 Neb., p. 221, Coal 

 Meas. 



subelegans, Meek, 

 1872, Pal. E. Neb., 

 p. 220, Coal Meas. 

 terminale, Hall, 

 1852, Stans. Ex. 

 to Gt. Salt Lake, 

 p. 41 3, Coal Meas. 

 ventricosum, Meek, 

 1871, Proc. Acad. 

 Nat. Sci. Phil., p. 

 168, and Ohio 

 Pal., vol. 2, p. 

 312, Waverly Gr. 

 winchelli, Meek, 

 1871, Proc. Acad. 

 Nat. Sci. Phil., p. 

 167, and Ohio 

 Pal., vol. 2, p. 

 311, Waverly Gr. 

 worthenanum,n.sp. 

 KeokukGr. Pro- 

 posed instead of 

 A. elongatum in 

 Geo. Sur. 111., vol. 8, p. 133, which was 

 preoccupied. 



AMBONYCHIA, Hall, 1847, Pal. N. Y., vol. 1, 

 p. 163. [Ety. ambon, the boss of a 

 shield; onyx, a claw or talon.] Equi- 

 v&lve, inequilateral, subalate poste- 



Fio. 769. Allorisma 

 subcuneatum. 



riorly, abrupt or curving down ante- 

 riorly ; umbones high ; beak incurved , 

 cardinal line oblique; sinuate on the 

 anterior side for the passage of the 

 byssus; muscular impression large; 

 cardinal tooth below the beak 

 anteriorly ; two or three remote 

 lateral teeth, elongated and 

 ranging parallel with the car- 

 dinal line posteriorly ; surface 

 radiately furrowed and con- 

 centrically lined. Type A. bel- 

 listriata. 



acutirostra, Hall, 1867, 20th Rep. 

 N. Y. Mus. Nat. Hist., p. 383, 

 Niagara Gr. 



alata, see Anomalodonta alata. 

 amygdalina, see Cypricardites 



amygdalinus. 



aphtea, Hall, 1867, 20th Rep. N. Y. 

 Mus. Nat. Hist, p. 383, Niagara Gr. 

 attenuata, Hall, 1861, Geo. Rep. Wis., 

 p. 33, and Geo. Wis., vol. 4, p. 206, 

 Trenton Gr. 

 bellistriata, Hall, 

 1847, Pal. N. Y., 

 vol.1, p. 163, Tren- 

 ton Gr. 



cancellosa, Hall, 1861, 

 Geo. Rep. Wis., 

 p. 31. Mistake for 

 A. lamellosa. 

 carinata, Goldfuss, 

 1826, ( Pterin ea 

 carinata,) Germ. 

 Petref., p. 136, and 

 Pal. N. Y., vol. 1, p. FIG. 770. Ambonychia 

 292, 294, Trenton bellistriata. h, Byssal 

 orwl TJ,^ -R;,T fi- sinus; t, cardinal 





teeth ; , lateral 



and Hud. Riv. Gr. 



casii, Meek & Wor- teeth, 

 then, 1866, Proc. 

 Chi. Acad. Nat, Sci., p. 22, Kud. 

 Riv. Gr. 



costata, Meek, 1873, Ohio Pal., vol. 1, p. 

 130, Hud. Riv. Gr. 



erecta, Hall, 1861, Geo. Rep. Wis., p. 32, 

 Trenton Gr. 



illinoisensis, Worthen, 1875, Geo. Rep. 

 111., vol. 6, p. 495, Hud. Riv. Gr. 



intermedia, Meek & Worthen, 1868, Geo. 

 Sur. 111., vol. 3, p. 306, Galena Gr. 



jamesi, Meek, 1872, (Megambonia jamesi,) 

 Proc. Acad. Nat. Sci. Phil., p. 321, and 

 Ohio Pal., vol. 1, p. 136, Hud. Riv. Gr. 



lamellosa, Hall. 1861, Geo. Rep. Wis., p. 

 31, and Geo. Wis., vol. 4, p. 205, Tren- 

 ton Gr. 



maxima, Safford, 1869, Geo. of Tenn. Not 

 defined. 



mytiloides, Hall, 1847, Pal. N. Y., vol. 1, 

 p. 315, Chazy Gr. 



neglecta, see Amphiccelia neglecta. 



nitida, Billings, 1866, Catal. Sil. Foss. 

 Antic., p. 50, Anticosti Gr. 



oblusa, see Cypricardites obtusus. 



orbicularis, Emmons, 1842, (Pterinea or- 

 bicularis,) Geo. Rep. N. Y., p. 397, 

 and Pal. N. Y., vol. 1, p. 164, Tren- 

 ton Gr. 



