ilO BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



46341. Modiolopsis modioliformis Meek and Wortheii. Plastotype. 

 Stones River (Ord.). Mineral Point, Wisconsin. 

 Meek and Wortheu, Geol. Surv. 111., Ill, 1868, p. 294. 

 = Whiteavesia modioliformis. 



46250. Modiolopsis mytiloides Hall. Plesiotype. 



Trenton (Ord.). Wykoff, Minnesota. 



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

 1894, p. 508, pi. 36, fig. 8. 



46251. Modiolopsis nana Ulrich. Holotype. 



Trenton (Ord.). Cannon Falls, Minnesota. 



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

 II, 1894, p. 507. pi. 36, fig. 7. 



46252. Modiolopsis oblonga Ulrich. Holotype. 



Trenton (Ord.). West Covington, Kentucky. 

 Ulrich, Amer. Geol., V, 1890, p. 272, figs. la-c. 



46253. Modiolopsis obsoleta Ulrich. Holotype. 



Black River (Ord.). Six miles .south of Cannon Falls, 

 Minnesota. 



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

 II, 1894, p. 509, pi. 36, figs. II, 12. 



17287. Modiolopsis occidens Walcott. Cotype. 



17288. Upper Pogonip (Ord.). Fi.sh Creek Mountains, and Lone 



Mountain, Nevada. 



Walcott. Mon. VIII, U. S. Geol. Surv., 1884, p. 77, pi. 1, fig. 5; 

 pi. II, figs. 14, 14a, 



46197. Modiolopsis orthonota Meek and Worthen. Pla.stotype. 



Stones River (Ord. ). Dunleith. lUinois. 



Meek and Worthen, Geol. Surv. 111., Ill, 1868, p. 295. 

 = P^ndodesma orthonotinn. 



46231. Modiolopsis oviformis Ulrich. Holotype. 



Trenton (Ord. ). Curd.sville, Kentucky. 

 Ulrich, Amer. Geol., V, 1890, p. 276, figs. 4a-c. 

 = Modiolodon oviformis. 



46254. Modiolopsis oweni Ulrich. Holotype. 



Trenton (()r(l. ). Five miles .south of Cannon Falls, Min- 

 nesota. 



Ulrich, Geol. and Nat. Ili.st. .Surv. Minn., I'inal Re])l., HI, Pt. 

 II, 1894, p. 506, pi. 42, figs. 15, 16. 



46255. Modiolopsis parva Ulrich. Cotypes. 



46256. Trenton (Ord.). Burgin, Kentucky. 

 Utica(Ord.). Covington, Kentuck}'. 



Ulrich, Amer. Geol., V, 1890, p. 282, figs. 9a-f. 



