192 



LAMELLIBRANCHIATA. 



strigosa, White, 1862, Proc. Bost. Soc. 



Nat. Hist., vol. 9, Chemung Gr. [Sig. 



lean, thin.] This species may belong 



to the genus Bakevellia. 

 sulcata, see Avicula sulcata. 

 GoNioPHORA, Phillips, 1848. [Ety. gonia, an 



angle; pkoros, bearing.] Goniophorus 



was used by Agassiz for a genus of 



Echinoderm's in 1840. 

 acuta. Hall, 1877, Pal. N. Y., vol. 5, Ham. 



Gr. [Sig. acute.] 

 bellula, Billings, 1874, Pal. Foss., vol. 2, 



Up. Sil. [Sig. small and beautiful.] 

 consimilis, Billings, 1874, Pal. Foss., vol. 



2, Up. Sil. [Sig. very like, just such 



another.] 

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



Chemung Gr. [Sig. smooth,] 

 hamiltonensis. Hall, 1870, (Sanguinolites 



hamiltonensis) Prelim. Notice Lam. 



Shells, Ham. Gr. [Ety. proper name.] 

 mediocris, Billings, 1874, Pal. Foss., vol. 



2, Up. Sil. [Sig. middling.] 

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



Up. Held. Gr. [Sig. very angular.] 

 rugosa, Conrad, 1841, (Cypricardites ru- 



gosa) Ann. Rep. N. Y., Ham. Gr. 



[Sig. wrinkled.] 

 transiens, Billings, 1874, Pal. Foss., vol. 



2, Up. Sil. [Sig. transient, passing.] 

 Grammysia, DeVerneuil, 1847, Bull. Soc. 



Geo. France. [Ety. gramme, a line of 



writing ; Mys, a mussel shell, in allu- 

 sion to the transverse furrows which 



cross the valves from the umbones to 



the middle of the ventral margin.] 

 acadica, Billings, 1874, Pal. Foss., vol. 2, 



Up. Sil. [Ety. proper name.] 

 alveata, Conrad, 18n,(Posidonia alveata) 



Ann. Rep. N. Y., Ham. Gr. [Sig. 



hollowed out.] 

 arcuata, Conrad, 1841, (Posidonia arcuata) 



Ann. Rep. N. Y., Ham. Gr. [Sig. 



arched.] 

 bisulcata, Conrad, 1838, (Pterinea bisul- 



cata, 1841,) (Cypricardites bisulcata) 



Ann. Rep. N. Y., Ham. Gr. [Sig. two- 

 furrowed.] 

 canadensis, Billings, 1874, Pal. Foss., vol. 



2, Up. Sil. [Ety. proper name.] 

 chemungensis, Pitt, 1874, BufF. Soc. Nat. 



Hist., Chemung Gr. [Ety. proper 



name.] 

 circularis. Hall, 1870, Prelim. Notice Lam. 



shells. Ham. and Chemung Gr. [Sig. 



circular.] 

 constricta. Hall, 1870, Prelim. Notice Lam. 



shells. Ham. Gr. [Sig. constricted.] 

 elliptica, Hall, 1870, Prelim. Notice Lam. 



shells, Chemung Gr. [Sig. elliptical.] 

 erecta. Hall, 1870, Prelim. Notice Lam. 



shells. Ham. Gr. [Sig. erect.] 

 globosa. Hall, 1870, Prelim. Notice Lam. 



shells. Ham. Gr. [Sig. globose.] 

 hamiltonenm, syn. for G. bisulcata. 

 hannibalensis, Shumard, 1855, (Allorisma 



hannibalensis) Geo. Sur. Mo., Kinder- 

 hook Gr. [Ety. proper name.] 



lirata. Hall, 1870, Prelim. Notice Lam. 



shells. Ham. Gr. [Sig. furrowed.] 

 magna, Hall, 1870, Prelim. Notice Lam. 



shells. Ham. Gr. [Sig. large.] 

 nodocostata. Hall, 1870, Prelim. Notice 



Lam. shells, Ham. Gr. [Sig. having 



nodes on the ribs.] 

 obsoleta, Hall, 1870, Prelim. Notice Lam. 



shells, Ham. Gr. [Sig. obsolete.] 

 parallela. Hall, 1870, Prelim. Notice Lam. 



shells. Ham. Gr. [Sig. parallel.] 

 prsecursor. Hall, 1870, Prelim. Notice Lam. 



shells, Schoharie grit. [Sig. a fore- 

 runner.] 

 remota, Billings, 1874, Pal. Foss., vol. 2, 



Up. Sil. [Sig. remote.] 

 rhomboidalis, Meek & Worthen, 1865, 



Proc. Acad. Nat. Sci. Phil., Ham. Gr. 



[Sig. rhomboidal.] 

 rhomboides, Meek, 1871, Proc. Acad. Nat. 



Sci. Phil., Waverly Gr. [Sig. rhomb- 

 like.] 

 rustica, Billings, 1874, Pal. Foss., vol. 2, 



Up. Sil. [Sig. rough, rustic] 

 secunda. Hall, 1870, Prelim. Notice Lam. 



shells, Up. Held. Gr. [Sig. following.] 

 subarcuata. Hall, 1870, Prelim. Notice 



Lam. shells, Chemung Gr. [Sig. 



somewhat like G. arcuata.'] 

 ventricosa. Meek, 1871, Proc. Acad. Nat. 



Sci. Phil., Waverly Gr. [Sig. ventri- 



cose.] 

 Gryphorhynchus, Meek, 1864, Am. Jour. Sci. 



Not defined. 

 Ilionia, Billings, 1875, Can. Nat. & Geol. 



[Ety. proper name.] 

 canadensis, Billings, 1875, Can. Nat. & 



Geol., Corniferous Gr. [Ety. proper 



name.] 

 sinaata, Hall, 1859, (Anatina sinuata) Pal. 



N. Y., vol. 3, Low. Held. Gr. [Sig. 



wavy.] 

 Inoceramus, Sowerby, 1818, Min. Conch., vol. 



2. This genus is unknown in Amer- 

 ican palaeozoic rocks. 

 chemungensis, see Mytilarca chemungensis. 

 mytilimeris, see Mytilarca mytilimeris. 

 oviformis, see Mytilarca oviformis. 

 IscHYRiNiA, Billings, 1866, Catal. Sil. Foss. 



Antic. [Ety. ischyros, strong.] 

 plicata, Billings, 1866, Catal. Sil. Foss. 



Antic, Anticosti Gr. [Sig. folded.] 

 winchelli, Billings, 1866, Catal. Sil. Foss. 



Antic, Hud. Riv. Gr. [Ety. proper 



name.] 

 Isocardia, Klein, 1753, Tent. Meth. Ostr. 



[Ety. isos, like; kardia, the heart.] 



This is an existing littoral genus that 



burrows in the sand. It is not known 



in the palaeozoic rocks. 

 (?) curta, Shumard, 1858, Trans. St. Louis 



Acad. Nat. Sci., Chemung Gr. [Sig. 



short.] 

 jenn{e, Winchell, 1863, Proc. Acad. Nat. 



Sci., Chemung Gr. [Ety. proper 



name.] 

 unimiformis, see Edmondia unioniformis. 



