BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 991 



Platystrophia biforata — Continued. 



Orthislynx Billings, Geol. Canada, 1863, p. 167, fig. 149.— Miller (part), Cin- 

 cinnati Quart. Jour. Sci., 2, 1875, p. 25. 



Orthis (Platystrophia) biforata Meek, Pal. Ohio, 1, 1873, p. 112. — Lesley, Geol. 

 Surv. Pennsylvania, Rep. P 4, 1889, p. 508, figs. 



Orthis (Platystrophia) biforata var. lynx Hall, 2d Ann. Rep. New York State 

 Geol., 1883, pi. 35, figs. 11-14 (not figs. 9, 10, 15 of pi. 35 and fig. 30, pi. 34). 



Platystrophia lynx Hall and Clarke, Pal. New York, 8, pt. 1, 1892, pp. 202, 223, 

 pi. 5B, fig. 10.— Keyes, Geol. Surv. Missouri, 5, 1895, p. 64, pi. 39, fig. 5. 



Platystrophia biforata Hall, 36th Rep. New York State Mus., 1884, p. 75, pi. 3, 

 fig. 2.— Beecher, Amer. Jour. Sci. Arts, 3d ser., 42, 1891, p. 55, figs. 2a, b. — 

 Winchell and Schuchert, Geol. Minnesota, 3, 1893, p. 455, pi. 33, figs. 51-54.— 

 Schuchert, Bull. U. S. Geol. Surv., 87, 1897, p. 309.— Whiteaves, Geol. Sun-. 

 Canada, Pal. Foss., 3, pt. 3, 1897, p. 177.— Schuchert, Proc. U. S. Nat. Mus., 

 22, 1900, p. 158.— Rued emann, Bull. New York State Mus., 49, for 1901, 1902, 

 p. 25. — Cumings, Arner. Jour. Sci., 4th ser., 15, 1903, p. 18; p. 41; p. 42, figs. 

 21, 22, 23; p. 122, fig. 26; 14, fig. 27.— Weller, Geol. Surv. New Jersey, Pal., 

 3, 1903, p. 153, pi. 9, figs. 25-28.— Grabau and Shimer, N. A. Index Fossils, 1, 

 1907, p. 258. 



Ordovician-Silurian: Various North American localities. 



Plesiotype— Oat. No. 51348, U.S.N.M. (Nettelroth). 

 Observation. — The above references are to various undetermined species of 



Platystrophia. 



Platystrophia biforata var. crassa Winchell and Schuchert. See Platystrophia 

 crassa. 



Platystrophia biforata var. laticosta Hall and Clarke. See Platystrophia lati- 

 costa. 



Platystrophia biforata var. lynx Hall and Clarke. See Platystrophia lynx. 



Platystrophia clarksvillensis Foerste. 



Platystrophia clarksvillensis Foerste, Bull. Sci. Lab. Denison Univ., 16, 1910, p. 



65, pi. 3, figs. 4, 3. 

 Richmond (Waynesville and Liberty): Fort Ancient, Clarksville, etc., Ohio. 



Platystrophia colbiensis Foerste. 



Platystrophia colbiensis Foerste, Bull. Sci. Lab. Denison Univ., 16, 1910, p. 55, 



pi. 4, figs. 2A-B. 

 Platystrophia cf. colbiensis Foerste, Jour. Cincinnati Soc. Nat. Hist., 21, 1914, p. 



131. 

 Trenton (Cynthiana): Between Colby and Winchester, Paris, Lexington, etc., 



Kentucky. 



Platystrophia colbiensis nuitata Foerste. 



Platystrophia colbiensis-mutata Foerste, Bull. Sci. Lab. Denison Univ., 16, 1910, 



p. 56, pi. 4, figs. 3a-b. 

 Trenton (Cynthiana): Pleasant Valley and near Winchester, Kentucky. 



Platystrophia colbiensis precursor Foerste. 



Platystrophia colbiensis precursor Foerste, Bull. Sci. Lab. Denison Univ., 16, 1910, 

 p. 57, pi. 4, fig. 1. 



Trenton (Cynthiana): Between Colby and Winchester, and also between Millers- 

 burg and Pleasant Valley, Kentucky. 



Platystrophia costata Cumings. See Platystrophia crassa. 



