STR.] 



BRACHIOPODA. 



381 



parva, Hall, 1863, 16th Rep. N. Y. Mus. 

 Nat. Hist., p. 37, Schoharie grit. This 

 name was preoccupied. 



patersoni, Hall, 1857, (Strophomena pat- 

 ersoni,) 10th Rep, N. Y. Mus. Nat. Hist., 

 p. 114, and Pal. N. Y., vol. 4, p. 89, Scho- 

 harie grit and Cornif. Gr. 



perplana, Conrad, 1842, (Strophomena 

 perplana,) Jour. Acad. Nat. ScL, vol. 8, 

 p. 257, and Pal. N. Y., vol. 4, p. 92, 

 Onondaga, Schoharie, Cornif., Ham., 

 and Chemung. Grs. 



perplana var. nervosa, Hall, 1843, (Stro- 

 phomena nervosa,) Geo. Rep. 4th Dist. 

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

 113, Chemung Gr. 



planulata, Hall, 1859, Pal. N. Y., vol. 3, 

 p. 184, Low. Held. Gr. 



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

 Nat. Hist., p. 90, Ham. Gr. 



prisca, Hall, 1852, Pal. N. Y., vol. 2, p. 63, 

 Clinton Gr. 



profunda, Hall, 1852, (Leptaena profunda,) 

 Pal. N. Y., vol. 2, p. 61, Clinton and 

 Niagara Grs. 



punclulifera, see Strophonella punctu- 

 lifera. 



quadrata, Swallow, 1860, Trans. St. Louis 

 Acad. Sci., vol. 1, p. 639, Ham. Gr. 



quadrata, Calvin, 1878, Bull. TJ. S. Geo. 

 Sur. Terr., vol. 4, No. 3, p. 728. The 

 name was preoccupied. See S. calvini. 



reversa, see Strophonella reversa. 



semifasciata, see Strophonella semifasciata. 



striata, Hall, 1843, (Strophomena striata,) 

 Geo. Rep. 4th Dist. N. Y., p. 104, Ni- 

 agara Gr. 



suhcymbiformis, Swallow, 1860, Trans. 

 St. Louis Acad. Sci., vol. 1, p. 636, 

 Ham. Gr. 



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

 Mus. Nat. Hist., p. 145, Ham. Gr. 



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

 327, Coralline Limestone. 



variabilis, Calvin, 1878, Bull. TJ. S. Geo. 

 Sur., vol. 4, No. 3. p. 727, TJp. 

 Held. Gr. 



varistriata, Conrad, 1842, (Strophomena 

 varistriata,) Jour. Acad. Nat. Sci., vol. 

 8, p. 255, and Pal. N. Y., vol. 3, p. 180, 

 Low. Held. Gr. 



varistriata var. arata, Hall, 1859, Pal. 

 N. Y., vol. 3, p. 183, Low. Held. Gr. 



vascularia, Hall, 1859, Pal. N. Y., vol. 3. 

 p. 412, Oriskany sandstone. 

 Stkophomena, Rafinesque, 18%, Manuel de 

 Malacologie of Blainville, p. 513. [Ety. 

 slrophos, bent; mene, a crescent.] Shell 

 somewhat semicircular, or somewhat 

 semioval, though variable in outline ; 

 thin ; one valve convex, the other con 

 cave, with a thin space between them for 

 the animal ; surface with radiating striae ; 

 hinge-line straight, longer or shorter 

 than the width of the shell below ; 

 anterior end of the shell usually de- 

 flected or bent over toward the dorsal 

 valve; ventral valve convex, flat on the 

 umbo; beak small, and minutely per- 



forated ; cardinal area nearly cut in two 

 parts by an angular notch, which is 

 closed, or nearly closed, by the bifid 

 cardinal process of the dorsal valve; 

 two divergent teeth, two adductor scars, 

 and two cardinal muscular impressions ; 

 dorsal valve having a linear area, two 

 cardinal processes close together at the 

 middle of the hinge-line, directed for- 

 ward ; sockets for the reception of the 

 teeth of the ventral valve; two mus- 

 cular scars in front of the cardinal pro- 

 cesses. Type S. rugosa, which is gener- 

 ally regarded as synonymous with S. 

 rhomboidalis. 



aculiradiata, see Chonetes acutiradiatus. 



alternata, Conrad, 1838, (Leptaena alter- 

 nata,) Ann. Rep. N. Y., p. 115, and 

 Pal. N. Y., vol. 1, pp. 102, 286, Trenton 

 and Hud. Riv. Grs. 



altemiradiata, Shaler, 1865, Bulletin No. 

 4, M. C. Z., Anticosti Gr. Not defined 

 so as to be recognized. 



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

 1, p. 109, Trenton and Hud. Riv. Grs. 



alternata var. 

 loxorhytis, ^ 

 Meek, 1873, 

 Ohio Pal., vol. 



1, p. 91, Hud. 

 Riv. Gr. 



ampla, see Stro- 



p'honella 



ampla. 

 analoga,Phillips, 



1836, G e o 1 . 



Yorkshire, vol. 2, pi. 7, fig. 10, Sub- 



carb. 

 anticostiensis, syn. for Strophomena alter- 

 y nata. 

 antiqnata, see Streptorhynchus anti- 



quatum. 

 arctostriata, see Streptorhynchus arcto- 



striatum. 

 arcuata, Shaler, 1865. This name was pre- 

 occupied, 

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



p. 132, Hud. Riv. Gr. 

 aurora, Billings, 1865, Pal. Foss., vol. 1, 



p. 218, Quebec. Gr. 

 bifurcata, syn. for Streptorhynchus pecti- 



naceum. 

 bipartita, Hall, 1852, (Leptaena bipartita,) 



Pal. N. Y., vol. 2, p. 326, Coralline Lime- 

 stone, 

 blainvillii, Billings, 1874, Pal. Foss., vol. 



2, p. 28, Up. Sil. 



camerata, Conrad, 1842, Jour. Acad. Nat. 



Sci., vol. 8, p. 254, and Pal. N. Y., vol. 



1, p. 106, Trenton Gr. 

 carinata, Conrad, 1838, see Tropidoleptus 



carinatus. 

 carinata, Conrad, 1842, see Chonetes car- 

 inatus. 

 ceres, Billings, 1860, Can. Nat. and Geo., 



vol. 5, p. 54, Hud. Riv. Gr. and 



Mid. Sil. 

 chemungensis, Conrad, 1842, Jour. Acad. 



Nat. Sci., vol. 8, p. 257, Chemung Gr. 



Fig. 622. —Strophomena 

 alternata. 



