408 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



46227. Modiolodon declivis Ulrich. Holotype. 



Richmond (Ord.). Richmond, Indiana. 



Ulrich, Geol. Sun-. Ohio, VII, 1893, p. 654, pi. 53, figs. 3, 4. 



46228. Modiolodon gantii (Safford). Cotypes. 



Trenton (Ord.). Wilson County, Tennessee. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. II, 

 1894, p. 521, fig. 406I. 



See Cyrtodonta gantii. 



46229. Modiolodon ? gibbus Ulrich. Holotj^pe. 



Black River (Ord.). Near Cannon Falls, Minnesota. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. II, 

 1894, p. 522, pi. 35, figs. 28, 29. 



46230. Modiolodon obtusus Ulrich. Cotypes. 



I/Orraine (Ord.). Cincinnati, Ohio. 



Ulrich, Geol. Surv. Ohio, VII, 1893, p. 654, pi. 52, figs. 20, 21. 



46231. Modiolodon oviformis (Ulrich). Holotype and Plesiotype. 



46232. Trenton (Ord.). Curdsville, Kentucky; Wilson County, 



Tennessee. 



Ulrich, Geol. Sun-. Ohio, VII, 1893, p. 652, pi. 53, figs. 7, 8; 

 Geol. and Nat. Hist. Sun'. Minn., Final Rept., Ill, Pt. II, 

 1894, p. 521, fig. 4og. 



See Modiolopsis oviformis. 



46233. Modiolodon oviformis amplus Ulrich. Cotypes. 



Trenton (Ord.). Frankfort, Kentucky. 



Ulrich, Geol. Surv. Ohio, VII, 1893, p. 653, pi. 53, figs. 1, 2. 



46234. Modiolodon patulus Ulrich. Cotypes. 



46235. Trenton (Ord.). Near Kenyon, Minnesota; near Dan- 

 46727. ville, Kentucky; Decorah, Iowa. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. II, 

 1S94, p. 521, pi. 37, figs. 20-24. 



46236. Modiolodon subovalis Ulrich. Cotypes. 



Richmond (Ord.). Versailles, Indiana. 



Ulrich, Geol. Sun-. Ohio, VII, 1S93, p. 655, pi. 51, figs. n-13. 



46237. Modiolodon subrectus Ulrich. Holotype. 



Richmond (Ord.). Richmond, Indiana. 



Ulrich, Geol. Sun*. Ohio, VII, 1893, p. 653, pi. 53, figs. 5, 6. 



46238. Modiolodon truncatus (Hall). Plesiotypes. 



46239. Richmond (Ord.). Versailles, Indiana. 

 L,orraine (Ord.). Cincinnati, Ohio. 



Ulrich, Geol. Sun-. Ohio, VII, 1893, p. 656, pi. 51, figs. 9, 10. 



46240. Modiolodon winchelli (Safford). Plesiotypes. 



Trenton (Ord.). Wilson County, Tennessee. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. II, 

 1S94, p. 521, figs. 40 e, f. 



