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 calhouni. 

 cwicentrica, 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. 



[iSty. proper name.] 

 hawni, Swallow, 1858, Trans. St. Louis 



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



name.] 

 inlesi, Winchell & Marcy, 1865, Proc. 



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



[Etv. proper name.] 

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

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

 sembling a shell of the genus £eda.] 

 mactroides, Winchell, 1866, Rep. Low. 



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

 sembling a shell of the genus Mactra.'j 

 marionensis, Swallow, 1860, Trans. St. 



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



proper name.] 

 nebrascensis, Geinitz, 1866, Carb. und 



Dyasin 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. 



somewliat oblong.] 

 philipi, Hall, 1870, Prelim. Notice Lam. 



shells, Chemung Gr. [Ety. proper 



name.] 

 radiaia, 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.] 

 mbangulata, see Cypricardites subangu- 



latus. 



mbiruncata, 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. 

 iapet, 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. enlos, inside; lekm, 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.] 

 EoPTEKiA, 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, BilUngs, 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.] 

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

 3rd series, vol. 7, a subgeneric name 

 proposed for Avicuhpecten negkctus, on 

 account of its peculiar hinge line. 

 Eumicrotu, syn. for Pseudomonotis. 



curta, see Pseudomonotis curta. 



hawni, see Pseudomonotis hawni. 



Imvmi var. mala, see Pseudomonotis 

 hawni var. ovata. 



hawni var. dnuata, see Pseudomonotis 

 hawni var. sinuata. 

 Exochorhynchvs, Meek, 1864, Pal. Up. Mo. 

 [Ety. e.wchos, prominent ; rhynchos, 

 beak.] This name was suggested as 

 a probable genus or subgenus to in- 

 clude Sedgwickia altirostrala. 

 Gervilua, DeFrance, 1820, Diet. Sci. Nat, 

 xviii. [Ety. proper name.] This 

 genus is probably unknown in the 

 pateozoic rocks. 



auricula, Stevens, 1868, Am. Jour. Sci., 

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



longa, see Avicula longa. 



Imgispina, see Monopteria longispina. 



