612 



LAMELLIBRANCHIA TA. 



[soi,. 



altirostrata, Meek & Hay den, 1858, (Al- 

 lorisma (?) altirostratum,) Proc. Acad. 

 Nat. Sci. Phil., p. 263, and Pal. Up. Mo., 



f. 41, Coal Meas. 

 compressa, Meek, 1872, Proc. Acad. 



Nat. Sci. Phil., p. 324, and Ohio Pal., 



vol. 1, p. 14-1, Hud. Riv. Gr. 

 concava, Meek & Hayden, 1858, (Lyonsia 



concava,) Trans. Alb. Inst., vol. 4, p. 



82, and Pal. Up. Mo., p. 41, Coal 



Meas. 

 (?) divaricata, Hall & Whitfleld, 1875, 



Ohio Pal., vol. 2, p. 89, Hud. Riv. Gr. 

 (?) fragilis, Meek, 1872, Proc. Acad. Nat. 



Sci. Phil., p. 323, and Ohio Pal., vol. 1, 



p. 143, Hud. Riv. Gr. 

 (?) lunulata, Whitfleld, 1878, Jour. Gin. Soc. 



Nat. Hist., vol. 1, p. 140, Hud. Riv. Gr. 

 neglecta, see Cuneamya neglecta. 

 subarcuata, Meek & Worthen, 1865, Proc. 



Acad. Nat. Sci. Phil., p. 251, and Geo. 



Sur. 111., vol. 3, p. 537, Keokuk Gr. 



FIG. 920. Sedgwickia topeketisis. 



topekensis, Shumard, 1858, (Leptodomus 

 topekaensis,) Trans. St. Louis Acad. 

 Sci., vol. 1, p. 208, and Pal. Up. Mo., p. 

 40, Coal Meas. 



Solemya, Lamarck, 1818, Hist. Nat. An. sans 

 Vert., vol. 5. See Solenomya the cor- 

 rect orthography, first used by Menke, 

 1828, Syn. Meth. Edit. 



SOLEN, Linnaeus, 1758, Syst. Nat., 10th ed. 

 [Ety. Solen, a tube or pipe.] Shell very 

 long ; subcylindrical ; ends gaping ; 

 hinge teeth two in each valve ; liga- 

 ment external ; anterior scar elongated ; 

 posterior oblong; pallialline extending 

 beyond the adductors. Type S. siliqua. 

 Not a Palaeozoic genus. 



FIG. 921. Solen siliqua. One-third diam. 



missouriensis, see Sanguinolites missouri- 



ensis. 



permiamis, see Solenopsis permianus. 

 priscus, Winchell, 1862, Proc. Acad. Nat. 



Sci., p. 423, Portage Gr. 

 quadrangnlaris, Winchell, 1862, Proc. Acad. 



Nat. Sci., p. 422, Marshall Gr. 

 scalpriformis, see Solenopsis scalpriformis. 

 SOLENOMYA, Lamarck, 1818, (Solemya,) Hist. 



Nat. Anim. sans Vert., vol. 5, p. 488. 



[Ety. from the resemblance to the two 



genera Solen and Mya.~\ Elongate, ob- 



long, equivalve, very inequilateral, 

 posterior end the shorter ; dorsal and 

 ventral margins subparallel ; ends 

 rounded and gaping; surface covered 

 with a thick, horny periostraca, ex- 

 tending in jagged portions beyond the 

 ventral margin ; beaks minute ; carti- 

 lage forming a thick, triangular mass 

 behind the beaks, supported internally 

 by an oblique ensiform plate ; long an- 

 terior margin simple, erect, without 

 teeth ; posterior adductor small, ovate, 

 within the cartilage pit, anterior im- 

 pression large, comma-shaped. Type S. 

 australis. 



anodontoides, Meek, 1875, Ohio Pal., vol. 

 2, p. 339, Coal Meas. 



biarmica, Verneuil, 1845, Geo. Russ. and 

 Ural Mountains, Permian Gr. This 

 species does not occur in this country. 



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

 Sur., vol. 8, p. 242, Subcarboniferous. 



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

 St. Mus. Nat. Hist., p. 13, and Geo. Sur. 

 111., vol. 8, p. 132, St. Louis Gr. 



monroensis, Worthen, 1884, Bull. No. 2, 

 111. St. Mus. Nat. Hist., p. 13, and Geo. 

 Sur. 111., vol. 8, p. 131, St. Louis Gr. 



radiata, Meek & Worthen, 1860, (Solemya 

 radiata,) Proc. Acad. Nat. Sci. Phil., p. 

 457. and Geo. Sur. 111., vol. 2, p. 349, 

 Coal Meas. 



recurvata, Swallow, 1858, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 208, Up. Coal 

 Meas. 



soleniformis, Cox, 1857, Geo. Sur. Ky., 

 vol. 3, p. 573, Coal Meas. 



varsoviensis, Worthen, 1884, Bull. No. 2, 

 111. St. Mus. Nat. Hist., -p. 12, and 

 Geo. Sur. 111., vol. 8, p. 131, Keo- 

 kuk Gr. 

 vetusta, Meek, 

 1871, Proc. 

 Acad. Nat. 

 Sci. Phil., p. 

 66, and Ohio 

 Pal., vol. 1, d. 

 206, Up. Held. 

 Gr. 



SOLENOPSIS, McCoy, 1844, Carb. Foss. Ire- 

 land, p. 47. [Ety. 

 Solentrpsis, re- 

 sembling a shell 

 of the genus 

 Solen.'] Elon- 

 gated ; beaks 

 compressed, anterior; depression in 

 front of beaks ; surface concentrically 



> marked. Type S. minor. 



permianus, Swallow, 1858, (Solen per- 

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

 vol. 1, p. 190, Permian Gr. 



scalpriformis, Winchell, 1862, (Solen 

 scalpriformis,) Proc. Acad. Nat. Sci., p. 

 422, Marshall Gr. 



solenoides, Geinitz, 1866, (Clidpphorus 

 solenoides.) Carb. und Dyas in Neb., 

 p. 25, and Pal. E. Neb., p. 223, Coal 

 Meas. 



FIG. 922. Soleuomya 

 vetusta. 



FIG. 923. Solenopsis 

 solenoides. 



