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



WILSONIA Kayser. Genotype Terebratula wilsoiii Sowerby. 



AVilsouia Kayser, Zeitschr. d. deutsch. geolog. Gesselsch., XXIII, 1871, p. 502. — 

 Hall ami Clarke, Pal. New York, VIII, Pt. II, 1893, p. 195;— ThirteeutU Ann. 

 Rep. N. Y. State Geologist, 1895, p. 827. 



Uncinulina Bayle, Explic. de la Carte Geolog. France, IV, 1878, Atlas, pi. 13, 

 figs. 13-16. 



Obs. A siihgeniis of Caruarotcecliia. 



Wilsonia kokomoensis (Miller). Waterlime (Sil.). 



Rhynchouella kokomoensis Miller, Eighteenth Ann. Rep. Geol. Survey Indiana, 



1894, p. 312, pi. 9, figs. 22-24. 

 Loc. Kokomo, Indiana. 



Wilsonia saffordi Hall. Niagara and Lower Helderberg (Sil. and Dev.). 



Rhynchouella saflfordi Hall, Canadian Nat. Geol., V, 1860, p. 146.— Hall and 

 Whitfield, Twenty-seventh Rep. N. Y. State Cab. Nat. Hist., 1875, pi. 9, figs. 

 27-29.— Dawson, Acadian GeoL, 3d ed., 1878, p. 598.— Nettelroth, Kentucky 

 Fossil Shells, Mem. Kentucky Geol. Survey, 1889, p. 79, pi. 27, figs. 22-21; 

 pi. 33, figs. 4-6. 



Wilsonia safifordi Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, p. 198, pi. 

 58, figs. 5-14. 



Loc. In the Arisaig group of Nova Scotia ; Perry County, Tennessee ; Louisville, 

 Kentucky. 



Wilsonia saffordi depressa (Nettelroth). Niagara (Sil.). 



Rhynchouella saffordi var. depressa Nettelroth, Kentucky Fossil Shells, Mem. 



Kentucky Geol. Survey, 1889, p. 80, pi. 33, fig. 1-3. 

 Loc. Louisville, Kentucky. 



Wilsonia wilsoni (Sowerby). Niagara (Sil.). 



Terebratula wilsoni Sowerby, Mineral Couchology, 1818, p. 118, fig. 3. 

 Rhyuchonella wilsoni Roemer, Sil. Fauna d. West. Tennessee, 1860, p. 71, pi. 5, 



fig. 13. 

 Wilsonia wilsoni Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, p. 198. 



Loc. Europe; Decatur County, Tennessee; Louisville, Kentucky; Lake Temis- 

 couata. New Brunswick. 

 YORKIA Walcott. Genotype Y. wanneri Walcott. 



Yorkia Walcott, Proc. U. S. Nat. Mus., Xlk, 1897, p. 714. 

 Yorkia wanneri AValcott. Lower Cambrian. 



Yorkia wanneri Walcott, Proc. U. S. Nat. Mus., XIX, 1897, p. 715, pi. 60, figs. 1-le. 



Loc. Emigsville, Pennsylvania. 

 Yorkia (?) washingtonensis Walcott. Lower Cambrian. 



Yorkia (?) washiugtouensis Walcott, Proc. U. S. Nat. Mus., XIX, 1897, p. 715, 

 pi. 60, fig. 3. 



Loc. Salem, Washington County, New York. 



ZYGOSPIRA Hall. Genotype Atryi^a modesta Hall. 



Stenocisma Hall (non Conrad), Pal. New York, I, 1847, p. 142.— Meek and Hay- 

 den, Pal. Upper Missouri, Smithsonian Cont. to Knowl., XIV, 1864, p. 16. 



Zygospira Hall, Fifteenth Rep. N. Y. State Cab. Nat. Hist., 1862, p. 154, figs. 

 1, 2.— Billings, Canadian Nat. Geol., VII, 1862, p. 393.— Hall, Twentieth Rep. 

 N. Y. State Cab. Nat. Hist., 1867, ]>. 267.— Meek, Geol. Survey, Illinois, III, 

 1868, p. 377.— Davidson, Suppl. British Silurian Brachiopoda, Pal. Soc, 1882, 

 p. 122.— Winchell and Schuchert, Minnesota Geol. Survey, III, 1893, p. 465.— 

 Beecher and Schuchort, Biol. Soc. Washington, VIII, 1893, pp. 71-82.— Hall 

 and Clarke, Pal. New York, VIII, Pt. II, 1893, p. 154. 



Anazyga Davidson, Suppl. British Silurian Brachiopoda, Pal. Soc, 1882, p. 128. 



