482 



LAMELUBRANCHL 1 TV /. 



[GOS. — GRA. 



carinata, Conrad, 1841, (Cypricardites 

 carinatus,) Ann. Rep. Geo. Sur. N. Y., 

 p. 53, and Pal. N. Y., vol. 5, pi. 44, figs. 

 6-8, Ham. Gr. 



chemungensis, Vanuxem, 1842, Cypri- 

 cardites chemungensis, ) Geo. Rep. N. Y., 

 p. 181, and Pal. N. Y., vol. 5, pi. 44, figs. 

 18-22, Chemung Gr. 



consimilis, Billings, 1874, Pal. Fobs., vol. 

 2, p. 135, Up. Sil. 



crassa, Whiteaves, 1888, Pal. Foss., vol. 3, 

 p. 9, Guelph Gr. 



glabra, Hall, 1883, Pal. N. Y., vol. 5, pi. 44, 

 figs. 9-17, syn. for G. glaucus. 



glaucus, Hall, 1870, (Sanguinolites glau- 

 cus,) Prelim. Notice Lam. Shells, p. 38, 

 and Pal. N. Y., vol. 5, p. 299, Ham. Gr. 



hamiltonensis, Hall, 1870, (Sanguinolites 

 hamiltonensis,) Prelim. Notice Lam. 

 Shells, p. 30, and Pal. N. Y., vol. 5, pi. 

 43, figs. 8-21, Ham. <ir. 



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

 p. 137, Up. Sil. 



minor, Hall, 1885, Pal. N. Y., vol. 5, p. 305, 

 Chemung Gr. 



perangulata, Hall, 1870, (Sanguinolites 

 perangulatus,) Prelim. Notice Lam. 

 Shells, and Pal. N. Y., vol. 5, pi. 34, figs. 

 1-7, Up. Held. <ir. 



retusa, Hall, 1883, Pal. N. Y., vol. 5,pt. l r 

 p. 266, Ham. Gr. 



Fig. 829.— Goniophora chemungensis 



plicata, Hall, 1858, (Cypricardella plicata,) 

 Trans. Alb. Inst., vol. 4, p. 18, and Bull. 

 Am. Mus. Nat. Hist., p. 66, Warsaw Gr. 



rugosa, Conrad, 1841, (Cypricardites ru- 

 gosus,) Ann. Rep. N. Y., p. 53, and Pal. 

 N. Y., vol. 5, p. 297, Ham. Gr. 



speciosa, Hall, 1879, Desc. New. Spec. 

 Foss., p. 17, and 11th Rep. Geol. Indi- 

 ana, p. 317, Niagara Gr. 



subrecta, Hall, 1885, Pal. N. Y., vol. 5, p. 

 304, Chemung Gr. 



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

 p. 134, Up. Sil. 



trigona, Hall, 1885, Pal N. Y., vol. 5, p. 

 302, Chemung Gr. 



truncata, Hall, 1883, Pal. N. Y., vol. 5, pi. 

 44, fig. 15, Ham. Gr. 



Gosselettia, Barrois, 1881, Ann. Soc. Geol. 

 du Nord, vol. 8, p. 176. [Ety. proper 

 name.] Shell subtriangular, truncate 

 on the anterior side, subalate posteri- 

 orly; ligamental area wide, longitudi- 

 nally striate ; cardinal teeth below the 

 beak strong; lateral teeth elongate; 

 surface with concentric striae. 



Fig. 830.— Gosselettia trlquetra. Right valve. 



triquetra, Conrad, 1838, (Pterinea trique- 

 tral Ann. Rep. Geo. N. Y., p. 116, 

 and Pal. N. Y., vol. 5, pt. 1, p. 265, 

 Ham. Gr. 

 Grammysia, DeVerneuil, 1847, Bull. Soc. 

 Geo. France, 2d ser., vol. 4, p. 696. 

 [Ety. gramme, a line of writing ; Mys, a 

 mussel shell, in allusion 

 to the transverse furrows 

 which cross the valves 

 from the umbones to the 

 middle of the ventral 

 margin.] Equivalve, in- 

 equilateral ; shell thick, 

 oblong ; anterior side 

 short, contracted by a 

 deep oval lunette beneath 

 the beak; posterior end 

 elliptically rounded; 

 hinge-line straight ; two 

 large adductor impressions 

 in each valve, anterior 

 rounded, posterior pear-shaped ; pallial 

 scar entire ; cartilage external, short, 

 in the anterior part of a deep depression 

 formed by the inflexion of the hinge 

 margins; an oblique furrow extends 

 from the beak to about the middle of 

 the ventral margin. Type G. bisulcata. 

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



p. 140, Up. Sil. 

 alveata, Conrad, 1841, (Posidonia alveata,) 

 Ann. Rep. N. Y., p. 53, and Pal. N. Y.. 

 vol. 5, pi. 57, figs. 1-2, and pi. 60^ 

 Ham. Gr.. 

 arcuata, Conrad, 1841, (Posidonia arcuata,) 

 Ann. Rep. N. Y., p. 53, and Pal. N. Y., 

 vol. 5, p. 373, Ham. Gr. 

 bisulcata, Conrad, 1838, (Pterinea bisul- 

 cata,) 1841, (Cvpricardites bisulcata,) 

 Ann. Rep. N. Y., p. 116, and Pal, N. Y., 

 ' vol. 5, pi. 51, figs. 1-16, Ham. Gr. 

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



2, p. 51, Gaspe sandstone. Up. Sil. 

 caswe.Ui, Foerste, 1885, Bull. Sci. Lab. Deni- 

 son University, p. 92. Not properly de- 

 fined. 



