LAMELLIBRANCHIATA. 



191 



binumbonata,Winchell, 1862, Proc. Acad. 

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

 double umbones.] 

 burlingtonensis, White & Whitfield, 1862, 

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

 Kinderhook Gr. [Ety. proper name.] 

 calhouni, see Pleurophorus (-"alhouni. 

 concentrica, see Astartella concentrica. 

 depressa, Hall, 1870, Prelim. Notice Lam. 

 shells, Waverly Gr. [Sig. depressed.] 

 elliptica, Winchell, 1863, 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, 1868, Acad. Geol., Carb. 

 [Ety. proper name.] 



hawni, Swallow, 1858, Trans. St. Louis 

 Acad. Sci., Coal Meas. [Ety. projjer 

 name.] 



inlesi, Winchell & Marcy, 1865, Proc. 

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

 [Ety. proper name.] 



ledoides, Winchell, 1866, Rep. Low. Pen- 

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

 sembling a shell of the genus Leda.'\ 



mactroides, Winchell, 1866, Rep. Low. 

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

 sembling a shell of the genus Maclra.l 



marionensis. Swallow, 1860, Trans. St. 

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

 proper name.] 



nebrascensis, Geinitz, 1866, 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. 



mhiruncota, 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 Gr. [Sig. undulated.] 

 unioniformis, Phillips, 1836, (Isocardia 



unioniformis) Geol. Yorkshire, vol. 2, 



Carboniferous. [Sig. resembling the 



shell of the genus Unio.] 

 ventricosa, Hall, see Cypricardites ventri- 



cosus. 

 Entolium, Meek, 1864, Cal. Geo. Sur., vol. 



2. [Ety. mtos, inside; leion, smooth.] 

 avicula. Swallow, 1858, (Pecten avicu- 



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



Meas. [Sig. like a shell of the genus 



Avicula.l 

 cooperensis, Shumard, 1855, (Avicula 



cooperensis) Low. Carb. [Ety. proper 



name.] 

 EoPTERiA, 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. eii, well; chasma, a hollow.] 

 blumenbachi, Billings, 1859, (Conocar- 



dium blumenbachi) Can. Nat. &Geo., 



vol. 4, Quebec Gr. [Ety. proper 



name.] 

 EucHONDRiA, Meek, 1874, Am. Jour. Sci., 



3rd series, vol. 7, a subgeneric name 



proposed for Aviculopecten neglectus, on 



account of its peculiar hinge line. 

 Euniicrotis, syn. for Pseudomonotis. 

 curta, see Pseudomonotis curta. 

 haumi, see Pseudomonotis hawni. 

 haivni var. ovata, see Pseudomonotis 



hawni var. ovata. 

 haivni var. sinuata, see Pseudo&ionotis 



hawni var. sinuata. 



Exochorhynchm, Meek, 1864, Pal. Up. Mo. 

 [Etv. exochos, prominent ; rhynchos, 

 beak.] This name was suggested as 

 a probable genus or subgenus to in- 

 clude Sedgwickia altirodrata. 

 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.] 



hiiga, see Avicula longa. 



hrigispina, see Monopteria longispina. 



