LAMELLIBRANCHIATA. 



191 



binumbonata, Winchell, 1862, Proc. Acad. 

 Nat. Sci., Marshall Gr. [Sig. having 

 double umbones.] 



burlingtonensis, White & Whitfield, 1802, 

 Proc. Bost. Soc. Nat. Hist., vol. 8, 

 Kinderhook Gr. [Ety. proper name.] 



caUiouni, see Pleurophorus calhouni. 



concentrica, see Astartella concentrica. 



depressa, Hall, 1870, Prelim. Notice Lam. 

 shells, Waverlv Gr. [Sig. depressed.] 



elliptica, Winchell, 1803, Proc. Acad. Nat. 

 Sci., Chemung Gr. [Sig. elliptical.] 



gibbosa, Swallow, 1858, Trans. St. Louis 

 Acad. Sci., Permian Gr. [Sig. gib- 

 bous, tumid.] 



glabra, Meek, 1872, Pal. E. Neb., Coal 

 Meas. [Sig. smooth.] 



hartti, Dawson, 1808, Acad. Geol., Carb. 

 [Ety. proper name.] 



hawni, Swallow, 1858, Trans. St. Louis 

 ' Acad. Sci., Coal Meas. [Ety. proper 

 name.] 



inlesi, Winchell & Marcy, 1805, Proc. 

 Bost. Soc. Nat. Hist., Niagara Gr. 

 [Ety. proper name.] 



ledoides, Winchell, 1800, Eep. Low. Pen- 

 insula Mich., Ham. Gr. [Sig. re- 

 sembling a shell of the genus Leda.] 



mactroides, Winchell, 1800, Rep. Low. 

 Peninsula Mich., Ham. Gr. [Sig. re- 

 sembling a shell of the genus Mactra.] 



marionensis, Swallow, 1800, Trans. St. 

 Louis Acad. Sci., Chemung Gr. [Ety. 

 proper name.] 



nebrascensis, Geinitz, 1806, Carb. und 

 Dyas in Neb., Coal Meas. [Ety. proper 

 name.] 



nilesi, Winchell & Marcy, 1865, Proc. 

 Bost. Soc. Nat. Hist., Niagara Gr. 

 [Ety. proper name.] 



nitida, Winchell, 1863, Proc. Acad. Nat. 

 Sci., Chemung Gr. [Sig. smooth, 

 neat.] 



nuptialis, Winchell, 1863, Proc. Acad. Nat. 

 Sci., Chemung Gr. [Sig. nuptial.] 



otoensis, Swallow, 1858, Trans. St. Louis 

 Acad. Sci., Permian Gr. [Ety. proper 

 name.] 



peroblonga, Meek& Worthen, 1866, Proc. 

 Acad. Nat. Sci. Phil., Coal Meas. [Sig. 

 somewhat oblong.] 



philipi, Hall, 1870, Prelim. Notice Lam. 

 shells, Chemung Gr. [Ety. proper 

 name.] 



radiata, see Clinopistha radiata. 



reflexa, Meek, 1872, Pal. E. Neb., Coal 

 Meas. [Sig. turned back, reversed.] 



rhomboidea, Hall, 1877, Pal. N.Y., vol. 5, 

 Chemung Gr. [Sig. rhomboidal.] 



semiorbiculata, Swallow, 1858, Trans. St. 

 Louis Acad. Sci., Permian Gr. [Sig. 

 half orb-shaped.] 



strigillata, Winchell, 1863, Proc. Acad. 

 Nat. Sci., Chemung Gr. [Sig. fur- 

 rowed.] 



subangulata, see Cypricardites subangu- 

 latus. 



subtruncata, Hall, 1847, see Cypricardites 

 subtruncatus. 



subtruncata, Meek, 1872, Pal. E. Neb., 

 Coal Meas. [Sig. somewhat trun- 

 cated.] 



tapetiformis, Meek, 1875, (E. tapesiformis) 

 Ohio Pal., vol. 2, Waverly Gr. [Ety. 

 tapet, a carpet; formis, like.] 



undulata, Hall, 1870, Prelim. Notice Lam. 

 shells, Chemung Gf. [Sig. undulated.] 



unioniformis, Phillips, 1830, (Isocardia 

 unioniformis) Geol. Yorkshire, vol. 2, 

 Carboniferous. [Sig. resembling the 

 shell of the genus Unio.'] 



ventricosa, Hall, see Cypricardites ventri- 

 cosus. 

 Extolium, Meek, 1804, Cal. Geo. Sur., vol. 

 2. [Ety. enlos, inside; Irion, smooth.] 



avicula, Swallow, 1858, (Pecten avicu- 

 lus) Trans. St. Louis Acad. Sci., Coal 

 Meas. [Sig. like a shell of the genus 

 Avicula.~\ 



cooperensis, Shumard, 1855, (Avicula 

 cooperensis) Low. Carb. [Ety. proper 

 name.] 

 Eoptkria, Billings, 1865, Pal. Foss., vol. 1. 

 [Ety. eos, dawn ; pteron, a wing.] Prof. 

 Billings says if Euchasma is the same 

 as Eopteria, then he desires Eopteria to 

 be withdrawn from science. 



(?) ornata, Billings, 1865, Pal. Foss., vol. 

 1, Quebec Gr. [Sig. adorned.] 



richardsoni, Billings, 1865, Pal. Foss.,vol. 

 1, Quebec Gr. [Ety. proper name.] 



typica, Billings, 1865, Pal. Foss., vol. 1, 

 Quebec Gr. [Ety. type of the genus.] 

 Euchasma, Billings, 1865, Pal. Foss., vol. 1. 

 < [Ety. eu, well ; chasma, a hollow.] 



blumenbachi, Billings, 1859, (Conocar- 

 dium blumenbachi) Can. Nat. & Geo., 

 vol. 4, Quebec Gr. [Ety. proper 

 name.] 

 ErciioxnKiA, Meek, 1874, Am. Jour. Sci., 

 3rd series, vol. 7, a subgeneric name 

 proposed for Avicidopecten neglectus, on 

 account of its peculiar hinge line. 

 Eumkrotis, syn. for Pseudomonotis. 



curia, see Pseudomonotis curta. 



hawni, see Pseudomonotis hawni. 



Imwni var. ovata, see Pseudomonotis 

 hawni var. ovata. 



limuni var. sinuata, see Pseudomonotis 

 hawni var. sinuata. 

 Exochorhynchus, Meek, 1864, Pal. Up. Mo. 

 [Ety. exochos, prominent ; rhynchos, 

 beak.] This name was suggested as 

 a probable genus or subgenus to in- 

 clude iSedyivtckia altirodratu. 

 Gervillia, DeFrance, 1820, Diet. Sci. Nat., 

 xviii. [Ety. proper name.] This 

 genus is probably unknown in the 

 palaeozoic rocks. 



auricula, Stevens, 1858, Am. Jour. Sci., 

 vol. 25, Coal Meas. [Sig. the ear lap.] 



longa, see Avicula longa. 



Umgispina, see Monopteria longispina. 



