STR.] 



BRACHIOPODA. 



379 



pandora, Billings, I860, Can. Jour., vol. 5, 

 p. 266, and Pal. N. Y., vol. 4, p. 68, 

 Schoharie grit and Cornif. Gr. 



pectinaceum, Hall, 1843, (Strophomena 

 pectinacea and S. bifurcata,) Geo. Rep. 

 4th Dist. N. Y., p. 266, and Pal. N. Y. 

 vol. 4, p. 73, Chemung Gr. 



perversum, Hall, 1857, (Orthis perversa,) 

 10th Rep. N. Y. Mus. Nat. Hist., p. 137, 

 and Pal. N. Y., vol. 4, p. 72, (Orthisina 

 alternata, 1860, 13th Rep.,) Cornif. and 

 Ham. Gr. 



planoconvexum, Hall, 1847, (Leptsena 

 planoconvexa,) Pal. N. Y, vol. 1, p. 

 114, Hud. Riv. Gr. 



planunibonum, Hall, 1847, (Leptsena 

 planumbona,) Pal. N. Y., vol. 1, p. 112, 

 Trenton and Hud. Riv. Gr. 



primordiale, Whitfield, 1886, Bull.Am.Mus. 

 Nat. Hist., vol. 1, p. 301, Birdseye Gr. 



pyramidale, Newberry, syn. for Meekella 

 striatocostata. 



radiatum, Vanuxem, 1843, (Strophomena 

 radiata,) Geo. Rep. 3d Dist. N. Y., p. 

 122, and Pal. N. Y., vol. 3, p. 193, Low. 

 Held. Gr. 



rectum, Conrad, 1843, (Strophomena 

 recta,) Proc. Acad. Nat. Sci., vol. 1, p. 

 332, and Pal. N. Y., vol. 1, p. 113, Black 

 Riv. and Trenton Grs. 



sinuatuin, Emmons, 1855, Am. Geol., p. 

 199, Hud. Riv. Gr. 



subplanum, Conrad, 1842, Jour. Acad. 

 Nat. Sci., vol. 8, p. 258, and Pal. N. Y., 

 vol. 2, p. 259, (Strophomena subplana,) 

 Niagara Gr. 



subtentum, Conrad, 1847, (Strophomena 

 subtenta,) Pal. N. Y., vol. 1, p. 115, 

 Trenton and Hud. Riv. Gr. 



sulcatum, Verneuil, 

 1848, (Leptsena sul- 

 cata,) Bull. Geol. Soc. 

 France, vol. 5, p. 

 350, and Ohio Pal., 

 vol. 1, p. 85, Hud. 

 Riv. Gr. 

 tenue, Hall, 1863, 

 Trans. Alb. Inst., 

 vol. 4, p. 210, Niag- 

 ara Gr. 



thalia, Billings, 1860, (Strophomena 

 thalia,) Can. Nat. and Geol., vol. 5, p. 

 39, Trenton Gr. 



umbraculum, Schlotheim, 1820, (Tere- 

 bratulites umbraculum,) Petrefakten- 

 kunde, p. 256, Devonian to the Per- 

 mian Gr. 



vetustum, James, 1874, Cin. Quar. Jour. 

 Sci., vol. 1, p. 241, Hud. Riv. Gr. One 

 of the forms of S. subtentum. 



woolworthanum, Hall, 1857, (Stropho- 

 mena woolworthiana,) 10th Rep. N. Y. 

 Mus. Nat. Hist., p. 48, and Pal. N. Y., 

 vol. 3, p. 192, Low. Held Gr. 

 Stricklandia, Billings, 1859, Can. Nat. Geo., 

 vol. 4. This name having been pre- 

 viously applied to a genus of fossil 

 plants, the author abandoned it and 

 proposed Stricklandinia. 



Fig. 620.— St rep to- 

 rhyuchns sulcatum. 

 Interior of dorsal 

 valve. 



Stricklandinia, Billings, 1863, Can. Nat. 

 and Geo., vol. 8, p. 370. [Ety. proper 

 name.] Large, elongate-oval, trans- 

 versely subcircular, sometimes com- 

 pressed, valves subequal ; short mesial 

 septum in the interior of the ventral 

 valve, supporting a small triangular 

 chamber, beneath the beak, as in Pen- 

 tamerus ; in the dorsal valve no longi- 

 tudinal septum, spires, or loop; two 

 short, rudimental plates, bearing pro- 

 cesses. Type S. gaspensis. 



anticostiensis, Billings, 1863, Can. Nat. 

 Geo., vol. 8, p. 370, Anticosti Gr. 



(?) arachne, Billings, 1862, Pal. Fobs., vol. 

 1, p. 85, Quebec Gr. 



(?) arethusa, Billings, 1862, Pal. Foss., vol. 



1, p. 85, Quebec Gr. 



brevis, Billings, 1859, Can. Nat. Geo., vol. 

 4, p. 135, Mid. Sil. 



canadensis, Billings, 1859, Can. Nat. Geo., 

 vol. 4, p. 135, Clinton Gr. 



castellana, White, 1876, Proc. Acad. Nat. 

 Sci., p. 30, Niagara Gr. 



davidsoni, Billings, 1868, Lond. Geo. 

 Mag., vol. 5, p. 59, Up. Sil. 



deformis, Meek & Worthen, 1870, Proc. 

 Acad. Nat. Sci., Phil., p. 37, and Geo. 

 Sur. 111., vol. 6, p. 502, Niagara Gr. 



elongata, see Amphigenia elongata. 



elongata var. curta, see Amphigenia curta. 



gaspensis, Billings, 1859, Can. Nat. Geo., 

 vol. 4, p. 134, Mid. Sil. 



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

 p. 89, Mid. Sil. 



multilirata, Whitfield, 1878, Ann. Rep. 

 Geo. Sur. Wis., p. 81, and Geo. Wis., 

 vol. 4, p. 315, Niagara Gr. 



salteri, Billings, 1874, Pal. Foss., vol. 2, p. 

 87, Anticosti Gr., Mid. Sil. 

 Strophalosia, King, 1844, Ann. and Mag. 

 Nat. Hist., vol. 14, p. 313. [Ety. strophe, 

 a bending; alos, a disk.] Having the 

 general form and muscular impressions 

 of Leptsena, with the tubuliferous or 

 spinous surface of Productus; pos- 

 sessed of a well-developed condyloid 

 hinge, area, and deltidium. Type S. 

 excavata. 



horre&cem, Geinitz, 1866, Carb. und Dyas 

 in Neb., p. 49. Prof. Meek regarded this 

 name as a syn. for Productus nebras- 

 kensis. 



numularis, Winchell, 1863, Proc. Acad. 

 Nat. Sci., p. 4, Marshall Gr. 

 Strophodonta, Hall, 1852, Pal. N. Y., vol. 



2, p. 63. [Ety. strophos, bent ; odous, 

 tooth.] General form and characters as 

 in Strophomena, one valve convex and 

 the other concave, and following nearly 

 the same curve as the convex one, leav- 

 ing only a thin space for the animal, 

 and the surface radiated ; distinguished, 

 however, by a crenulated hinge-line ; 

 the absence of a foramen in the area of 

 the ventral valve ; dental lamellae ab- 

 sent, or nearly so ; the divaricator mus- 

 cular impressions spreading, flabelli- 

 form, without limitation, by an elevated 



