BRA CHIOPODA. 



351 



oblonga, Conrad, 1839, Ann. Rep. N. Y. 

 The name was preoccupied, and after- 

 ward it was called L. clintoni. 



obtusa, Hall, 1847, Pal. N. Y., vol. 1, p. 

 98, Trenton Gr. 



ovata, McCoy, 1844, Syn. Sil. Foss. Ire- 

 land, p. 24. Not clearly identified in 

 America. 



paliformis, Hall, 1860, 13th Rep. N. Y. St. 

 Mus. Nat, Hist, p. 76, and Pal. N. Y., 

 vol. 4, p. 8, Ham. Gr. 



papillosa, Emmons, 1856, Am. Geol., p. 

 202, Trenton Gr. 



perlata. Hall, 1859, Pal. N. Y., vol. 3, p. 



156, Low. Held. Gr. 



perovata, Hall, 1852, Pal. N. Y., vol. 2, p. 

 55, Clinton Gr. 



perplexa, Hall, 1877, 1st ed. Am. Pal. Foss., 

 p. 244. Proposed instead of L. ellip- 

 tica, which was preoccupied, but D'Or- 

 bigny had previously proposed L. sub- 

 elliptica. 



perryi, Billings, 1861, Pal. Foss., vol. 1, p. 

 20, Black Riv. Gr. 



philomela, Billings, 1862, Pal. Foss., vol. 

 1, p. 49, Trenton Gr. 



pinmformis, see Lingulepis pinniformis. 



polita, see Obolella polita. 



prima, see Lingulepis prima. 



prima, Emmons, 1856, Am. Geol. This 

 name was preoccupied. 



proctori, Ulrich, 1889, Am. Geol., vol. 3, 

 p. 377, Trenton Gr. 



progne, Billings, 1862, Pal. Foss., vol. 1, p. 

 47, Utica Slate and Trenton Grs. 



punctata, Hall, 1863, 16th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 21, and Pal. N. Y., 

 vol. 4, p. 10, Ham. Gr. 



quadrata, Eichwald, 1829, (Crania quad- 

 rata,) Zool. Specialis, vol. 1, p. 273, 

 and Pal. N. Y., vol. 1, p. 96, Tren- 

 ton Gr. 



quebecensis, Billings, 1862, Pal. Foss., vol. 

 1, p. 72, Quebec Gr. 



reciilatera, Hall, 1859, Pal. N. Y., vol. 3, 

 p. 156, Low. Held. Gr. 



rectilateralis, Emmons, 1842, Geo. Rep. 

 N. Y., p. 399, Utica Slate. 



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

 p. 95, Trenton Gr. 



scotica, Davidson, 1860, Monogr. Scot. 

 Garb. Brach., p. 62, Waverly Gr. 



scotica var. ntbraskensis, see L. nebras- 

 kensis. 



spathata, Hall, 1859, Pal. N. Y., vol. 3, p. 



157, Low. Held. Gr. 



spatiosa, Hall, 1859, Pal. N. Y., vol. 3, p. 



158, Low. Held. Gr. 



spatulata, Vanuxem, 1842, Geo. Rep. 3d 

 Dist. N. Y., p. 168, and Pal. N. Y., vol. 

 4, p. 13, Genesee slate. 



stoneana, Whitfield, 1882, Geo. Wis., vol. 

 4, p. 344, Potsdam Gr. 



striata, Emmons, 1856, Am. Geol., p. 112, 

 Up. Taconic. 



subelliptica, D'Orbigny, 1850, Prodr. d. 

 Paleont, t. 1, p. 34, Clinton Gr. Pro- 

 posed instead of L. elliptica, Hall, in 

 1843, Geo. Rep. 4th Dist. N. Y., p. 77. 



suboblonga, D'Orbigny, syn. for L. clintoni. 



subspatulata, Meek & Worthen, 1868, Geo. 

 Sur. 111., vol. 3, p. 437, Ham. Gr. 



thedfordensis, Whiteaves, 1887, Cont. to 

 Can. Pal., vol. 1, p. Ill, Ham. Gr. 



trentonensis, Conrad, 1842, Jour. Acad. 

 Nat. Sci., vol. 8, p. 266, Trenton Gr. 



triquetra, Clarke, 1885, Bull. U. S. Geo. 

 Sur., vol. 16, p. 62, Portage (Jr. 



umbonata, Cox, 1857, 

 Geo. Sur. Ky.,vol. 3, p. 

 576, Coal M'eas. 



vanhorni, S. A. Miller, 

 1875, Gin. Quar. Jour. 

 Sci., vol. 2, p. 9, Hud. 

 Riv. Gr. 



varsoviensis, Worthen, F RwTTrjn 

 1884, Bull. No. 2 111. vanimrn" 

 St. Mus. Nat. Hist., p. 

 24, and Geo. Sur. 111., vol. 8, p. 104, War- 

 saw Gr. 



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

 Sur., vol. 8, p. 109, Devonian. 



whitfieldi, Uliich, 1889, Am. Geol., vol. 3, 

 p. 381, Utica Slate. 



winona, Hall, 1863, 16th Rep. N. Y. St. 



Mus. Nat. Hist., p. 126, Potsdam Gr. 

 LINGULELASMA, Ulrich, 1889, Am. Geol., vol. 

 3, p. 383. [Ety. Lingula, a genus; elasma, 

 plate.] Form and composition like 

 Lingula ; pedicle valve with slightly 

 projecting beak, faintly arched deltid- 

 ium, no area, small socket on each side 

 of the deltidial borders, and subtrian- 

 gular scar opposite their anterior ends 

 subtriangular, trilobed platform from 

 base of detidium to middle of valve, 

 with central part produced below in a 

 low median ridge ; two muscular scars 

 on the lower lateral sides of the plat- 

 form ; brachial valve, with transverse 

 ridge and swollen ends for sockets on 

 the opposite valve ; platform concave, 

 elevated in front, and prolonged in a 

 median plate, subcardinal, umbolateral 

 and postmedian scars. Type L. schu- 

 cherti. 



FIG. 576. Lingulelasma schucherti. , Posterior 

 transverse ridge; 6, subcardinal scars; u, um- 

 bolateral scars ; 'p, postmedian scars; I, lateral 

 scars; TO. median scars; n, anterior scars; t, 

 transverse scars; s, septum; 5a, ventral valve. 



schucherti, Ulrich, 1889, Am. GeoL, vol. 

 3, p. 389, Hud. Riv. Gr. 



