670 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Ischadltes subturblnatus Hall. 



Receptaculites eubturbinatus Hall, Trans. Albany Inst., 4, 1863, p. 224; 28tli 

 Rep. New York State Mus. Nat. Hist., 1879, p. 103, pi. 3, figs. 1-3 (doc. ed., 

 1875 (1877), pi. 3, figs. 1-3); 11th Rep. State Geol. Indiana, 1882, p. 221, pi. 2, 

 figs. 1-3.— Lesley, Geol. Sun\ Pennsylvania, Rep. P4, 1889, p. 855, text figs. 



Ischadites subturbinatus Winchell and Schuchert, Geol. Minnesota, 3, pt. 1, 1895 

 (ext., 1893), p. 66. 



Ischadites koenigii (part) Hinde, Quart. Jour. Geol. Soc. London, 40, 1884, p. 836. 



Niagaran (Waldron): Waldron, Indiana. 



Ischadites tesselatus Winchell and Marcy. See Receptaculites tesselatus. 



ISCHTRINIA Billings. Genotype: I. winchelli Billings. 



Ischyrinia Billings, Cat. Sil. Foss. Anticosti, Geol. Surv. Canada, 186G, p. 16. — 



Miller, N. A. Geol. Pal., 1889, p. 483. 

 Ischyrina Clarke, Mem. New York State Mus., 6, 1904, p. 406, expl. pi. 9. 

 Observation. — Probably the same as Technophorus. 



Ischyrinia plicata Billings. See Technophorus plicata. 



Ischyrinia winchelli Billings. 



Ischyrinia Winchelli Billings, Cat. Sil. Foss. Anticosti, Geol. Surv. Canada, 1886, 



p. 16, figs. 4a-4c.— Miller, N. A. Geol. Pal., 1889, p. 483, fig. 834. 

 Richmond (English Head and Charleton): Macasty Bay, Anticosti. 

 Plastotype.— Cat. No. 46204, U.S.N. M. 



ISCHTRODONTA Uhich. Genotype: I. truncata Uhich. 



Anodontopsis (part) Meek, Amer. Jour. Sci. Arts, 3d ser., 2, 1871, p. 209; also 



1873, Ohio Pal., 1, p. 141. 

 Ischyrodonta Ulrich, Amer. Geol., 6, 1890, p. 173; Geol. Surv. Ohio., 7, 1893, 



p. 671.— Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 



981.— Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 416.— Miller, 



N. A. Geol. Pal., 1st App., 1892, p. 700. 



Ischyrodonta curta Foerste. See Ischyrodonta unionoidee. 



Ischyrodonta declplens Ulrich. 



Ischyrodonta decipiens Ulrich, Geol. Surv. Ohio, 7, 1893, p. 673, pi. 54, figs. 



16-19.— Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 999, 



pi. 45, figs. 3-3c. 

 Richmond (Elkhorn): Near Richmond, Inoiana. 

 Cotypes.— Cat. Nos. 46205, 46206, U.S.N.M. 



Ischyrodouta olougata Ulrich. 



Ischyrodonta elongate Ulrich, Amer. Geol., 6, 1890, p. 175, figs. 12a-c; Geol. Surv. 



Ohio, 7, 1893, p. 675, pi. 54, figs. 20, 21.— Cumings, 32d Ann. Rep. Dep. Geol. 



Nat. Res. Indiana, 1908, p. 1000, pi. 45, figs. 4, 4a. 

 Richmond (AMiitewater): Oxford, Oliio; Richmond, Indiana. 

 JJolotypc and pksiotypc.—Cat. Nos. 46207, 46208, U.S.N.M. 



Ischyrodonta mlseneri Ulrich. 



Ischyrodonta miseneri Ulrich, Rep. Geol. Surv. Ohio, 7, 1893, p. 675, pi. 54, figs. 



10, 11.— Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 



1001, pi. 45, figs. 5, 5a. 

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

 Richmond (Whitewater): Richmond, Indiana. 

 Eolotyp«.—C&t. No. 46209, U.S.N.M. 



