EAT. EIC.] 



BRACHIOPODA. 



345 



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

 Mus. Nat. Hist, p. 29, Chemung Gr. 



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

 Mus. Nat. Hist., p. 30, Waverly Gr. 



nitida, Phillips, 1836, (Orbicula nitida,) 

 Geo. of York., vol. 2, p. 221, and Geo. 

 Sur. 111., vol. 5, p. 572, Coal Meas. 



patellaris, Winehell, 1863, Proc. Acad. Nat. 

 Sci., p. 4, Waverly or Marshall Gr. 



pelopea, Billings, 1862, Pal. Foss., vol. 1, 

 p. 52, Trenton Gr. 



pleurites, Meek, 1875, Ohio Pal., vol. 2, p. 

 278, Waverly Gr. 



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

 Mus. Nat. Hist., p. 25, Ham. Gr. 



saffordi, Winchell, 1869, Geo. of Tenn., 

 and, in 1870, Proc. Am. Phil. Soc., p. 

 248, Marshall Gr. 



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

 Mus. Nat. Hist., p. 26, Ham. Gr. 



sublamellosa, Ulrich, 1878, Jour. Gin. Soc. 

 Nat. Hist., p. 97. Probably the cast of 

 a Trematis. 



subtrigonalis, McChesney, 1865, Desc. New 

 Pal. Foss., Coal Meas. Not recognized. 



tenuilamellata, Hall, 1852, (Orbicula ten- 

 uilamellata,) Pal. N. Y., vol. 2, p. 250, 

 Niagara Gr. 



tenuilamellata var. subplana, Hall, 1860, 

 Can. Nat. and Geol., vol. 5, p. 144, Up. Sil. 



tenuilineata, Meek & Hayden, 1859, Proc. 

 Acad. Nat. Sci., p. 25, Coal Meas. 



tenuistriata, Ulrich, 1878, Jour. Gin. Soc. 

 Nat. Hist., p. 96. Probably the cast of 

 a Trematis. 



trigonalis, syn. for D. subtrigonalis. 



truncata, see Schizobolus truncatus. 



tullia, Hall, 1863, 16th Rep. N. Y. St. Mus. 

 Nat. Hist, p. 28, Tully limestone. 



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

 p. 162, Water-lime or Low. Held. Gr. 



varsoviensis, Worth en, 1884, Bull. No. 2, 

 111. St. Mus. Nat Hist, p. 23, and Geo. 

 Sur. 111., vol. 8, p. 102, Keokuk Gr. 

 EATONIA, Hall, 1857, 10th Rep. N. Y. St. 

 Mus. Nat. Hist, p. 90, and 12th Rep., 

 p. 35. [Ety. proper name.] Oval, ovoid, 

 subcircular, elongate, or transverse ; 

 valves very unequally convex ; mesial 

 fold and sinus; beak of ventral valve 

 small, perforate, closely incurved over 

 the umbo of the dorsal valve; two 

 teeth in the ventral, with corresponding 

 sockets in the dorsal valve ; a prominent 

 bifurcating cardinal process and four 

 crural processes in the dorsal valve dis- 

 tinguish this genus. Type E. medialis. 



eminens, Hall, 1857, N. Y. St. Mus. Nat. 

 Hist, p. 92, and Pal. N. Y., vol. 3, p. 242, 



Low. Held. Gr. 

 medialis, Vanux- 

 em, 1842, (Atrypa 

 mediaalis,) Geo. 

 Rep.3d Dist. N. 

 FIG. 562.-Eatoma medi- Y^p.121 andPal. 



alls. Anterior view. N.Y., vol.3,p.241, 



Low. Held. Gr. 



peculiaris, Conrad, 1841, (Atrypa pe- 

 culiaris,) Ann. Rep. N. Y., p. 56, and 



Pal. N. Y., vol. 3, p. 244, Oriskany and 

 Low. Held. Gr. 

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



437, Oriskany sandstone. 

 singularis, Vanuxem, 1842, (Atrypa sin- 

 gularis,) Geo. Rep. 

 3d Dist. N. Y., p. 

 120, and Pal. N. Y., 

 vol. 3, p. 243, Low. 

 Held. Gr. 



sinuata, Hall, 1857, FIG. 563.-Eatonia 

 10th Rep. N. Y. St. singularis. 



Mus. Nat Hist, p. 

 91, and Pal. N. Y., vol. 3, Oriskany 

 sandstone. 

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



p. 437, Oriskany sandstone. 

 EICHWALDIA, Billings, 1858, Rep. of Progr. 

 Geo. Sur. Can., p. 190. [Ety. proper 

 name.] Ovate or subtrigonal, with or 

 without mesial fold and sinus ; ventral 

 valve obscurely perforate on the umbo ; 

 apex acute and entire; space beneath 

 occupied by an imperforate concave 

 plate ; interior of the rostral cavity 

 containing a transverse septum ; dorsal 

 valve with a slender cardinal process 

 and a very elevated medio-longitudinal 

 septum ; valves articulated in a narrow 

 groove in the dorsal valve ; surface of 

 the shell reticulate, solid, and fibrous 

 beneath. Type E. subtrigonalis. 

 anticostiensis, Billings, 1866, Catal. Sil. 

 Foss. Antic., p. 10, Hud. Riv. Gr. 



concinna, Hall, 



1868. 20th Rep. 



N. Y. St. Mus. 



Nat. Hist, p. 31 9, 



Niagara Gr. 

 coral lifera, Hall, 



1852, (Atrypa 



corallif era, ) Pal. 



N. Y., vol. 2, p. 



281, Niagara Gr. 



Prof. Davidson 

 regarded this shell as identical with E. 

 capewelli, which was described in 1848, 

 in Bull. Soc. Geol. France, vol. 3. 

 g i b bosa, 

 Hall, 1868, 

 20th Rep. 

 N. Y. St. 

 Mus. Nat. 

 Hist, p. 

 319, Niag- 

 ara Gr. 

 r eticulata, 

 Hall, 1863, 

 ( Rh y n- 

 chonella(?) 

 reticula- 

 ta,) Trans. 



l ' A DS ri' 

 v l- 4. P- 



217, Niag- front, and apex views. 

 ara Gr. 

 Davidson said a syn. for E. capewelli. 

 subtrigonalis, Billings, 1858, Rep. of Progr. 

 Geo. Sur. Can., p. 192, Black Riv. Gr. 



FIG. 564. Eichwaldia 

 reticulata. 



| 



- 565. Ecb waldia subtrigo- 

 nails. Dorsal, ventral, side, 



