BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 671 



Ischyrodonta modiollformls Ulrich. 



iBchyrodonta modiolifonnis Ulrich, Geol. Surv. Ohio, 7, 1893, p. 676, pi. 64, 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. 

 Holotype.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. Ulrich, 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. G&t. No. 46212, U.S.N.M. 



Ischyrodonta unlonoides (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. 

 Ischyrodonta 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. 

 Plesiotypes. 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. 1'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, Die Leitfossilien, 

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

 Ulrich, Zittel-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. 



