670 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Ischadites subturbinatus Hall. 



Receptaculites subturbinatus Hall, Trans. Albany Inst., 4, 1863, p. 224; 28th 

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

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

 figs. 1-3. Lesley, Geol. Surv. 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, 1866, 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. 



ISCHYRODONTA Ulrich. Genotype: I. truncata Ulrich. 



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 Shinier, 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 decipiens 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, Indiana. 

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



Ischyrodonta elongata Ulrich. 



Ischyrodonta elongata 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 (Whitewater) : Oxford, Ohio; Richmond, Indiana. 

 Holotype and plesiotypeC&t. Nos. 46207, 46208, U.S.N.M. 



Ischyrodonta miseneri 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 (gen. ref.). 

 Richmond (Whitewater) : Richmond, Indiana. 

 Holotype.Czt. No. 46209, U.S.N.M. 



