378 



BRACHIOPODA. 



[STR. 



duplicatum, Hall, 1843, (Atrypa dupli- 

 cata,) Geo. 4th Dist. N. Y., pi. 67, fig. 2 

 and 2a, and Pal. N. Y., vol. 4, p. 350, 

 Chemung Gr. 



eximium, Hall, 1843, (Atrypa eximia,) 

 Geo. 4th Dist. N. Y., pi. 66, and Pal. 

 N. Y., vol. 4, p. 348, Chemung Gr. 



FIG. 616. Stenochisma eximium. 



formosum, Hall, 1857, (Rhynchonella 

 formoea,) 10th Rep. N. Y. Mus. Nat. 

 Hist., p. 76, and Pal. N. Y., vol. 3, p. 

 236, Low. Held. Gr. 



horsfordi, Hall, 1860, 13th Rep. N. Y. Mus. 

 Nat. Hist., p. 87, and Pal. N. Y., vol.4, 

 p. 339, Cornif. Gr., Marcellus shale and 

 Ham. Gr. 



orbiculare, Hall, 1860, (Rhynchonella or- 

 bicularis,) 13th Rep. N. Y. Mus. Nat. 

 Hist,, p. 88, and Pal. N. Y., vol. 4, p. 353, 

 Chemung Gr. 



prolificum, Hall, 1867, Pal. N. Y., vol. 4, 

 p. 343, Ham. Gr. 



royanum, Hall, 1860, Pal. N. Y., vol. 4, p. 

 338, Cornif. Gr. 



sappho, Hall, 1860, (Rhynchonella 

 sappho,) 13th Rep. N. Y. Mus. Nat. 

 Hist., p. 87, and Pal. N. Y., vol. 4, p. 

 340, Marcellus shale and Ham. Gr. 



stephani, Hall, 1867, Pal. N. Y., vol. 4, p. 

 349, Chemung Gr. 



tethys, Billings, 1860, (Rhynchonella 

 tethys,) Can. Jour., vol. 5, p. 271, Cor- 

 nif. Gr. 



STBEPTORHYNCHUS, King, 1850, Monograph 

 of Permian Fossils, p. 107. [Ety. strepto, 

 I bend or twist ; ' rhynchos, beak.] 

 Semicircular or in general form of 

 Strophomena, concavo-convex, plano- 

 convex, Or both valves convex and 

 striated; ventral beak small, or pro- 

 longed, bent and twisted, fissure be- 

 neath, closed or partially closed by a 

 solid deltidium ; area wide on the ven- 

 tral valve and narrow on the dorsal ; 

 externally like Strophomena, but inter- 

 nally resembling Orthis. Type S. pe- 

 largonatum. 



alternatum, Hall, 1860, (Orthisina alter- 

 nate,) 13th Rep. N. Y. Mus. Nat. Hist., 

 p. 81, Ham. Gr. 



americanum, Whitfield, 1878 > (Hemi- 

 pronites americanus,) Ann. Rep. Geo. 

 Sur. Wis., p. 72, and Geo. Wis., vol. 4, 

 p. 243, Hud. Riv. Gr. 



antiquatum, Sowerby, 1839, (Orthis anti- 

 quata,) Murch. Sil. Syst., p. 630, Anti- 

 costi Gr., Div. 3, Mid. Sil. 



arctostriatum, Hall, 1843, (Strophomena 

 arctostriata,) Geo. Rep. 4th Dist. N. Y., 

 p. 266, Chemung Gr. 



arctQstriatum, Hall, 1860, 13th Rep. N. Y. 

 Mus. Nat Hist., p. 80, (Ortbisina arcto- 



striata,) Ham. Gr. This name was pre- 

 occupied, 

 biloba, Hall, 1883, Rep. St. Geol., pi. 41, 



figs. 4, 5, Coal Meas. 

 cardinale, Whitfield, 1880, Ann. Rep. Geo. 



Sur. Wis., p. 61, and Geo. Wis., vol. 4, 



p. 261, Hud. Riv. Gr. 



chemungense, Conrad, 1843, (Stropho- 

 mena chemungensis,) Jour. Acad. Nat. 



Sci., vol. 8, p. 357, and Pal. N. Y., vol. 



4, p. 67, Chemung Gr. 

 crassum, Meek & 



Hayden, 1858, 



(Orthisina cras- 



sa,) Proc. Acad. 



Nat. Sci.. Phil., 



p. 260, and Geo. 



Sur. 111., vol. 5, p. 



570, Coal Meas. 

 crenistriatum, Phil- 

 lips, 1836, (Spi- FIG. 617. Streptorhyn- 



rifera crenistria.) ch us crassum. Dorsal 



Geo. York., vol. 2, vlew - 



p. 216, Waverly Gr. 

 deflectum, Conrad, 1843, (Strophomena 



deflecta,) Proc. Acad. Nat. Sci. Phil., p. 



332, and Pal. N. Y., vol. 1, p. 113, Tren- 

 ton Gr. 

 elongatum, James, 1874, Cin. Quar. Jour. 



Sci., vol. 1. p. 240, Hud. Riv. Gr. A 



variety of S. subtentum. 

 filitextum, Hall, 1847, (Lepteena filitexta,) 



Pal. N. Y., vol. 1, p. Ill, Trenton and 



Hud. Riv. Grs. 

 flabellum, Whitfield, 1882, Desc. New 



Spec. Foss., from Ohio, p. 200, Up. 



Held. Gr. 



FIG. 618. Streptorhynchus hallanum. Exterior 

 and interior of dorsal valve. 



hallanum, S. A. Miller, 1874, Cin. Quar. 

 Jour. Sci., vol. 1, p. 148, Hud. Riv. Gr. 

 hemiastfr, syn. for S. 



subplanum. 

 hydraulicum, Whit- 

 field, 1882, Desc. 

 New Spec. Foes., 



'rh' ncnusballanuin" from O hio > P- 193 > 

 Interior of ventral Low. Held. Gr. 

 valve. inflatum, White & 



Whitfield, 1862, Proc. Bost. Soc. Nat. 

 Hist., vol. 8, p. 293, Kinderhook Gr. 

 lens, White, 1862, Proc. Bost. Soc. Nat. 



Hist, vol. 9, p. 28, Chemung Gr. 

 minor, Walcott, 1885, Monogr. U. S. Geo. 



Sur., vol. 8, p. 75, Trenton Gr. 

 nutans, Meek, 1873, (Hemipronites nu- 

 tans, Pal. Ohio, vol. 1, p. 77, Hud. 

 Riv. Gr. 



occidental, Newberry, syn. for Meekella 

 striatocostata. 



