378 



BRACHIOPODA. 



[STR. 



duplicatum, Hall, 1843, (Atrypa dupli- 

 cate,) 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— Stenochlsma eximium. 



formosum, Hall, 1857, (Rhynchonella 



formosa,) 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, 



6339, Cornif. (Jr., Marcellus shale and 

 am. Gr. 



orbiculare, Hall, 1860, (Rhvnchonella 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. <ir. 



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. 

 Stbeptoruynchus, King, 1850, Monograph 

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

 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 Stropbomena, but inter- 

 nally resembling Orthis. Type 8. pe- 

 largonatum. 



alternatum, Hall, 1860, (Orthisina alter- 

 nata,) 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. 



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

 Mus. Nat Hist, p. 80, (Orthisina 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. (ir. 



chemungense, Conrad, 1843, (Stropho- 

 mena chemungensis,) Jour. Acad. Nat. 

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

 4, p. 67, Chemung (ir. 



crassum, Meek & 

 Hayden, 185 8, 

 (Orthisina cras- 

 sa,) Proc. Acad. 

 Nat. Sci.. l'lul.. 



p. 260, and Geo. 



Sur. 



111., vol. 5, p. 

 570, Coal Meas. 



crenistriatum, Phil- 

 lips, 1836, (Spi-KlG. «I7 -Str.pt. .rhyn- 

 riiera crenistria,) chuscrassum. Dona] 

 Geo. York., vol. 2, vi,u 

 p. 216, Waverly Gr. 



deflectum, Conrad, 1843, (Strophomena 

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

 .hi. I Pal. N. Y., vol. l, p. 113, Tren- 

 ton (ir. 



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

 S.L. vol. 1, p. 840, Hud. Riv. <ir. A 

 variety of S. subtentum. 



filitextum, Hall, 1847, (Leptana filit.xta,) 

 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.— Ki !•«■]>< <>rlj \ nclms hallanum. Exterior 

 and Interior nf dorsal valve. 



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

 Jour. Sci., vol. 1, p. 148. I hid. Riv. Gr. 

 hemiaster, syn. for S. 



Bubplanum. 

 hydraulicum, Whit- 

 field, 1882, Desc. 

 New Spec. Fo68., 



Fig. 619.— Strepto- 

 rhyncuus hallanum. 

 Interior of ventral 

 valve. 



from Ohio, p. 193, 

 Low. Held. Gr. 



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. (Jeo. 

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



nutans, Meek, 1873, (Hemipronites nu- 

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

 Riv. Gr. 



occidentale, Newberry, syn. for Meekella 

 striatocostata. 



