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



WILSONIA Kayser. Genotype Teiebratula wilsoni Sowerby. 



Wilsonia Kaysor, Zeitscbr. <l. deutsch. geolog. Gesselscli., XXIII, 1871, p. 502. — 

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

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



Unciuulina Bayle, Explic. de la Carte Gdolog. France, IV, 1878, Atlas, pi. 13, 

 figs. 13-16. 



Obs. A subgenus of CamarotcBcbia. 



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



Rbyncbonella 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.). 

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



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



27-29.— Dawson, Acadian Geol., 3d ed., 1878, p. 598.— Nettelrotb, Kentucky 



Fossil Shells, Mem. Kentucky Geol. Survey, 1889, p. 79, pi. 27, figs. 22-24; 



pi. 33, figs. 4-6. 

 Wilsonia saffordi 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 ; Perrj^ County, Tennessee ; Louisville, 



Kentucky. 



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



Rbyncbonella saffordi var. depressa Nettelrotb, 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 Conchology, 1818, p. 118, fig. 3. 

 Rbyncbonella 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., XIX, 1897, p. 714. 



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



pi. 60, fig. 3. 

 Loc. Salem, Washington County, New York. 



ZYGOSPIRA Hall. Genotype Atrypa 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, p. 267.— Meek, Geol. Survey, Illinois, III, 

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

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

 Beecber and Scbuchert, 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 Bracbiopoda, Pal. Soc, 1882, p. 128. 



