BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 811 



Modiolodon obtusus Ulrich. 



Modiolopsis modiolaris Hall and Whitfield (not Hall), Pal. Ohio, 2, 1875, pi. 2, 



fig. 17. 

 Modiolodon obtusus Ulrich, Geol. Surv. Ohio, 7, 1893, p. 654, pi. 52, figs. 20 and 



21.— Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 1005, 



pi. 46, figs. 4, 4a. 

 Maysville (Bellevue): Cincinnati, Ohio, and vicinity. 

 Cotypes.— Cat. No. 46230, U.S.N.M. 



Modiolodon oviformis (Ulrich). 



Modiolopis oviformis Ulrich, Amer. Geol., 5, 1890, p. 276, fig. 4a-c. 



Modiolodon oviformis Ulrich, Geol. Surv. Ohio, 7, 1893, p. 652, pi. 53, figs. 7 and 8. — 

 Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 521, fig. 40g. — Grabau and 

 Shinier, N. A. Index Fossils, 1, 1909, p. 516, figs. 693, 694a. 



Trenton (Hermitage): Boyle, Mercer, Anderson, and Franklin Counties, Ken- 

 tucky; Wilson County, Tennessee. 



Holotype and plesiotype — Cat. Nos. 46231, 46232, U.S.N.M. 



Modiolodon oviformis amplus Ulrich. 



Modiolodon oviformis var. amplus Ulrich, Geol. Surv. Ohio, 7, 1893, p. 653, pi. 53, 



figs. 1 and 2. 

 Trenton (Hermitage): Frankfort, Kentucky. 

 Cotypes.— Cat. No. 46233, U.S.N.M. 



Modiolodon patulus Ulrich. 



Modiolodon patulus Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 521, pi. 37, figs. 

 20-24.— Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 516, fig. 69.4b, c. 



Modiolopsis patulus Miller, N. A. Geol. Pal., 2d App., 1897, p. 782 (gen. ref.). 



Trenton: Kenyon, Goodhue County, Minnesota; Decorah, Iowa (Prosser); Dan- 

 ville, Kentucky. 



Cotypes— Cat. Nos. 46234, 46727, U.S.N.M. 



Modiolodon poststriatus Foerste. 



Modiolodon poststriatus Foerste, Bull. Sci. Lab. Denison Univ., 17, 1914, p. 294, 



pl. 1, fig- 7. 

 Cincinnatian (Pulaski): Near Vars, Quebec. 



Modiolodon snbovalis Ulrich. 



Modiolodon subovalis Ulrich, Geol. Surv. Ohio, 7, 1893, p. 655, pl. 51, figs. 11-13.— 



Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 1006, pl. 46, 



figs. 3-3b. 

 Richmond ( Arnheim-Waynesville) : Versailles, Indiana. 

 Cotypes— Cat. No. 46236, U.S.N.M. 



Modiolodon subrectus Ulrich. 



Modiolodon subrectus Ulrich, Geol. Surv. Ohio, 7, 1893, p. 653, pl. 53, figs. 5, 



6.— Cumings, 32d Arm. Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 1007, pl. 



46, figs. 5-5a. 

 .Modiolopsis subrectus Miller, N. A. Geol. Pal., 2d App., 1897, p. 782 (gen. ref.). 

 IUchmond (Whitewater) : Richmond, Indiana. 

 Holotype.— Cat. No. 46237, U.S.N.M. 



Modiolodon subrhomboidcus Branson. 



Modiolodon subrhomboidcus Branson, Trans. Acad. Sci. St. Louis, 18, 1909, p. 



41, pl. 7, fig. 1. 

 Black River (Auburn-Decorah ) : Lincoln County, Missouri. 



84243°— Bull. 92— vol 2—15 7 



