428 SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. [bull. 87. 



Strophodonta booiiensis Swa]low=S. navalis boonensis. 

 Strophodonta cadata Hall = Strophonella cadata. 

 Stiopliodouta cavumbona PIall = Stroplionella cavumbona. 

 Strophodonta cayuta Hall=Stopheodonta mucronata. 

 Strophodonta cyinbiforniis Swallow=S. navalis. 

 Strophodonta exilis Calvin = Stropheodonta calvini. 

 Strophodonta fragilis nall = S. i^erplana. 

 Strophodonta geniculata nall=:Strophonella geniculata. 

 Strophodonta headleyana nall = Strophonella headleyana. 

 Strophodonta hybrida Hall and Whittield = Strophonella reversa. 

 Strophodonta iniitata A. Winchell=S. demissa iiuitata. 

 Strophodonta inflexa Swallow=S. navalis boonensis. 

 Strophodonta intermedia Hall = Hipparionyx proximns. 

 Strophodonta leaven worthana Hall = Strophonella leaven worthan a. 

 Strophodonta mncronata Hall=S. interstrialis. 

 Strophodonta nacrea nall=Pholidostropliia iowaensis. 

 Strophodonta punctulifera HalI = Strophonella punctulifera. 

 Strophodonta quadrata Swallow=S. callawayensis. 

 Strophodonta quadrata Calvin (non Swallow) = S. calvini. 

 Strophodonta reversa Hall = Strophonella reversa. 

 Strophodonta striata Hall=Strophonella striata. 

 Strophodonta subcyinbitbrinis Swallow=S. navalis. 

 Strophodonta subdemissa Hall = S. demissa. 

 Strophodonta textilis Hall, 1857 (not 1852)=S. junia. 

 STROPHOMENA (Rafinesque) Blainville. Genotype S. rugosa Blainv. 



Stropliomcna Blainville, Manuel tie Malacologie et Couchyliologie, 1, 1825, p. 513, 

 pi. 53, fig. 2. — Defrauce, Dictionnaire des Sciences Natnrelles, LI, 1827, p. 151 

 and atlas. — King, Mon. Permian Fossils, Pal. Soc, 1850, p. 103. — Meek (par- 

 tim), Pal. Oliio, I. 1873, p. 73. — O^blert, Fischer's Manuel do Conoliyliologie, 

 1887, p. 1281.— Hall and Clarke, Pal. New York, VIII, P.t. I, 1892, p. 245.— 

 Winchell and Schucbert, Minnesota Geol. Survey, III, 1893, p. 381. — Hall 

 and Clarke, Eleventh Ann. Rep. N. Y. State Geologist, 1894, p. 283. 



Strophonienes Rafinesque, Desc. Remarkable Objects in the Cabinet of Professor 

 Rafinesqne, 1831, ji. 4. 



Hemipronites Meek and Hayden, Pal. Upper Missouri, Smithsonian Cont. to 

 Knowl. XTV, 172, 1864, ]). 24.— Miller, Cincinnati Quart. Jour. Sci., II, 1875, 

 p. 41. 



Obs. This genus is characteristic of the Ordovician, and probably does not 

 extend into the Silurian, where Orthotbetes replaces Strophoracna. A num- 

 ber of Silurian species are still left under Strophomeua since their generic 

 characters are unknown. 



Strophomena acanthoptera Whiteaves=Stropheodonta acanthoptera. 

 Stro])hoineiia acntiradiata Hall=Chonetes acutiradiatus. 

 Strophomena alternata Emmons=Rafinesqnina alternata. 

 Stroi)homena alternata fracta Meek=]lafinesquina alternata fraeta. 

 Stroi)homena alternata loxorhytis Meek = Kafinesquina alternata lox- 



orhytis. 

 Stroi)bomena alteruistriata Hall = llafiue8quina alternata alteruistriata. 



