BIBLIOGEAPHIC LIST OF GENERA AND SPECIES. 671 



Ischyrodonta modlollformis Ulrich. 



Ischyrodonta modioliformia Ulrich, Geol. Surv. Ohio, 7, 1893, p. 676, pi. 54, figs. 

 4-9.— Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 1001, 

 pi. 45, figs. 6, 6e.— Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 416, 

 fig. 539. 



Richmond (Whitewater): Richmond, Indiana. 



Cotypes— Cat. No. 46210, U.S.N.M. 



Ischyrodonta ovalls Ulrich. 



Ischyrodonta ovalis Ulrich, 19th Ann. Rep. Geol. Nat. Hist. Surv. Minnesota, 



1892, p. 242, fig. 27; Geol. Surv. Ohio, 7, 1893, p. 674, pi. 54, figs. 12-15; 

 Geol. Minnesota, 3, pt. 2, 1894, p. 477, fig. 35.— Cumings, 32d Ann. Rep. 

 Dep. Geol. Nat. Res. Indiana, 1908, p. 1002, pi. 45, figs. 7-7b. 



Cypricardites ovalis Miller, N. A. Geol. Pal., 2d App., 1897, p. 781 (gen. ref.). 

 Richmond (Whitewater) : Near Richmond, Indiana. 

 Holoty 2)6. —C&t. No. 46211, U.S.N.M. 



Ischyrodonta truncata Ulrich. 



Ischyrodonta truncata Ulrich, Amer. Geol., 6, 1890, p. 174, fig. 11. — Miller, N. A. 

 ' Geol. Pal., 1st App., 1892, p. 700, fig. 1258.— Ukich, Geol. Surv. Ohio, 7, 



1893, p. 672, fig. 1.— Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 



1908, p. 1003, pi. 45, figs. 8-8c.— Grabau and Shimer, N..A. Index Fossils, 1, 



1909, p. 416, fig. 540. 



Richmond (Whitewater): Oxford, Ohio, and Richmond, Indiana. 

 Cotypes.— Cat. No. 46212, U.S.N.M. 



Ischyrodonta unionoides (Meek). 



Anodontopsis? unionoides Meek, Amer. Jour. Sci. Arts, 2, 1871, p. 299. 

 Anodontopsis (Modiolopsis?) unionoides Meek, Pal. Ohio, 1, 1873, p. 141, pi. 12, 



figs. 2a, b. — Miller, Cincinnati Quart. Jour. Sci., 1, 1874, p. 227. 

 Modiolopsis unionoides Miller, N. Amer. Geol. Pal., 1890, p. 491 (gen. ref.). 

 Ischyrodonta unionoides Ulrich, Geol. Surv. Ohio, 7, 1893, p. 677, pi. 54, figs. 



1-3.— Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 1004, 



pi. 46, figs. 1, la. — Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 416, 



fig. 538. 

 Ischyi-odonta curta Foerste, Bull. Sci. Lab. Denison Univ., 17, 1914, p. 298, pi. 3, 



fig. 14. 

 Maysville (Bellevue): Cincinnati, Ohio, and vicinity. Pulaski shales of New 



York and Canada. 

 Plesioty pes. —Cat. No. 46213, U.S.N.M. 



IsoARCA LOGANi Woodward. See Ctenodonta nasuta. 



ISOCHILINA Jones. Genotype: Leperditia Ottawa Jones. 



Isochilina Jones, Geol. Surv. Canada, dec. 3, 1858, p. 97; Ann. Mag. Nat. Hist., 

 3d ser., 1, 1858, p. 248; Monthly Microsc. Jour., 4, 1870, p. 191.— Barrande, 

 Syst. Sil. du Centre Boheme, 1, Suppl., 1872, p. 533.— Schmidt, Mem. I'Acad. 

 Imp. Sci. St. Petersburg, 7th ser., 21, No. 2, 1873, p. 8.— Zittel, Handb. 

 Pal., 2, 1885, p. 552.— Vogdes, Annals New York Acad. Sci., 5, 1889, p. 22, 

 pi. 2, fig. 18.— Miller, N. A. Geol. Pal., 1889, p. 551.— Koken, DieLeitfossilien, 

 Leipzig, 1896, p- 40.— Grabau, Bull. Buffalo Soc. Nat. Sci., 6, 1899, p. 307.— 

 Ukich, Zittol-Eastman Textb. Pal., 1, 1900, p. 643.— Grabau, Bull. New 

 York State Mus., 45, 1901, p. 218; Bull. Buffalo Soc. Nat. Sci., 7, 1901, p. 

 218.— Jaekel, Zeits. geol. Gesell., 53, 1901, p. 149.— Grabau and Shimer, N. 

 A. Index Fossils, 2, 1910, p. 341.— Bassler, Zittel-Eastman Textb. Pal., 2d 

 ed., 1913, p. 737. 



