360 



BRACHIOPODA. 



[ORT. PEN. 



subnodosa, Hall, 1879, Desc. New Spec. 

 Foss., p. 14, and llth Rep. Geo. and 

 Nat. Hist. Ind., p. 286, Niagara Gr. 

 suborbicularis, Hall, 1858, Geo. of Iowa, 



p. 486, Ham. Gr. 

 subquadrata, Hall, 1847, Pal. N. Y., vol. 



1, p. 126, Trenton to Hud. Riv. Gr. 

 mbumbona, see Martinia subumbonata. 

 swallovi, Hall, 1858, Geo. Rep. Iowa, p. 



597, Burlington Gr. 

 tenuidens, Hall, 1852, Pal. N. Y., vol. 2, p. 



58, Clinton Gr. 



tenuistriata, Hall, 1843, Geo. Rep. 4th 

 Dist. N. Y., p. 244, Portage Gr. The 

 name was preoccupied by Sowerby. 

 testudinaria, Dalman, 1827, Vet. Acad. 

 Hand., p..-115, and Pal. N. Y., vol. 1, p. 

 117, Trenton and Hud. Riv. Grs. 

 thiemii, White, 1860, Jour. Bost. Soc. 

 Nat. Hist., vol. 7, p. 231, and Cont. to 

 Pal. No. 8, p. 164, Kinderbook Gr. 



tioga, Hall, 1867, Pal. N. Y., 

 vol. 4, p. 59, (O. interlineata, 

 Sow.,) Geo. Rep. 4th Dist. 

 N. Y., Portage and Chemung 

 Grs. 



tricenaria, Conrad, 1843, Proc. ' 

 Acad. Nat. Sci., vol. 1, p. 333, I 

 and Pal. N. Y., vol. 1, p. 121, | 

 Trenton Gr. 



trinucleus, Hall, 1852, Pal. ! 

 N.Y., vol.2, p. 58, Clinton Gr. | 

 triplicatella, Meek, 1873, Ohio I 

 Pal., vol. 1, p. 109, Hud. j 

 Riv. Gr. 

 tritonia, Billings, 1862, Pal. Foss., vol. 1, 



p. 76. Quebec Gr. 



tubulostriata, Hall, 1857, 10th Rep. N. Y. 

 St. Mus. Nat. Hist., p. 42, and Pal. 

 N. Y., vol. 3, p. 166, Low. Held. Gr. 

 tulliensis, Vanuxem, 1843, Geo. Rep. 3d 



of ventral valve with two broad, dental 

 lamellae bordering the cardinal pit, and 

 converging to a 

 mesial line at 

 the surface of 

 the shell ; in- 

 terior of dorsal 

 valve with a FIG. 593. Orthisina grand- 

 trifid rostral va. Dorsal and ven- 

 tooth, from ***- 

 which a small mesial septum extends 

 toward the margin ; lateral cardinal 

 teeth as in Orthis. Tpye O. verneuili. 



alternate, see Streptorhynchus perversum. 



arctostriata, see Streptorhynchus arcto- 

 striatum. ' 



crassa, see Streptorhynchus crassum. 



diversa, Shaler, syn. for Orthisina ver- 

 neuili. 



festinata, Billings, 1861, Pal. Foss., vol. 

 1, p. 10, Georgia Gr. 



grandseva, Billings, 1859, Can. Nat. Geo., 

 vol. 4, p. 349, Calcif. Gr. 



missouriensis, Swallow, 1858, syn. for 

 Meekella striatocostata. 



occidentals, Swallow, 1863, Trans. St. 

 Louis Acad. Sci., vol. 2, p. 82, Up. Coal 



FIG. 592. 

 Ortbls tri- 

 ce n aria. 

 Half nat- 

 ural size. 



Dist. N. Y., p. 163, and Pal. N. Y., vol. 



p. 55, Tully 

 uberis, Billings, 1866, Catal. Sil. Foss. 



4, p. 55, Tully limestone. 



Antic., p. 42, Anticosti Gr. 



umbonata, see Amboccelia umbonata. 



umbraculum, DeKoninck, see Orthis keo- 

 kuk and Streptorhynchus umbraculum. 



unguiculus, Phillips, as identified by Hall 

 in 1843, see Ambocoelia gregaria. 



unguiformis, Castlenau, 1843, Syst. Sil., p. 

 37, syn. for Orthis hipparionyx. 



vamixemi, Hall, 1857, 10 Rep. N. Y. St. 

 Mus. Nat. Hist., p. 135, and Pal. N. Y., 

 vol. 4, p. 47, Ham. Gr. 



vanuxemi, Winchell, 1862, Proc. Acad. 

 Nat. Sci., vol. 6, 2d ser., p. 409, Portage 

 Gr. The name was preoccupied. 



varica, Conrad, 1842, (Delthyris varica,) 

 Jour. Acad. Nat. Sci.. vol. 8, p. 262, and 

 Pal. N. Y., vol. 3, p. 179, Low. 

 Held. Gr. 



OHTHISINA, D'Orbigny, 1850, Prodr. d. Pal., 

 vol. 1, p. 16. [Ety. Orthis, a genus ; inus, 

 implying resemblance to.] External 

 characters of Orthis, but the triangular 

 pit in the cardinal area of the ventral 

 valve is closed by a cicatrix with an 

 oval perforation near the apex ; interior 



orientalis, Whitfield, 1884, Bull. Am. Mus. 

 Nat. Hist., vol. 1, p. 139, Georgia Gr. 



shumardana, Swallow, 1858, Trans. St. 

 Louis Acad. Sci., p. 183, Permian Gr. 



transversa, Walcott, 1886, Bull. U. 8, Geo. 

 Sur., No. 30, p. 121, Up. Taconic. 



verneuili Eichwald, 1842, (Orthis ver- 

 neuili,) Urwelt Russie, vol. 2, p. 51, 

 Trenton and Anticosti Gr. 

 Pentagonia, Cozzens, 1846, Ann. N. Y. Ly- 

 ceum, vol. 4, p. 158. [Ety. pente, five; 

 Cia, an angle.] This genus seems to 

 re been founded upon Conrad's 

 Atrypa unisulcata, which is now referred 

 to Meristella. The genus is not recog- 

 nized by authors. 



ptersi, Cozzens, 1846, Ann. N. Y. Ly- 

 ceum, vol. 4, p. 158, syn. for Meristella 

 unisulcata. 



FIG. 594. Pentamerella arata. Dorsal view. 



PKNTAMKRELLA, Hall, 1867, Pal. N. Y., vol. 

 4, p. 375. [Ety. diminutive of Penta- 



