848 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



41281. Leperditia appressa Ulrich. Cotypes. 



41282. Trenton (Ord.). Near Harrodsburg and Danville, Ken- 



tuck}'. 



Ulrich, Journ. Cincinnati Soc. Nat. Hist., XIII, 1890, p. 176, pi. 

 11, figs. 5a-5d. 



15401. Leperditia? argenta Walcott. Cotypes. 



Middle Cambrian. One mile below Argenta, Big Cotton- 

 wood Canyon, Utah. 



Walcott, Bull. No. 30, U. S. Geol. Surv., 18S6, p. 146, pi. 8, fig. 5. 



41365. Leperditia bivertex Ulrich. Holotype. 



Utica (Ord.). Covington, Kentucky. 



Ulrich, Journ. Cincinnati Soc. Nat. Hist., II, 1879, p. 11, pi. 7, 

 figs. 5, 5a. 



17411. Leperditia bivia White. Cotypes. 



Middle Ordovician. Oueeu Spring Hill, Schell Creek 

 Range, Nevada. 



White, Prelim. Rept. U. S. Geogr. Surv. W. 100th Merid., 1874, 

 p. 11; Rept. U. S. Geogr. Surv. W. 100th Merid., IV, Pt. I, 

 1877, p. 58, pi. 3, figs. 7a-7d. 



41276. Leperditia caecigena Miller. Plesiotypes. 



Richmond (Ord.). Indian Kentuck Creek, near Madison, 

 Indiana. 



Ulrich, Journ. Cincinnati Soc. Nat. Hist., XIII, 1890, p. 176, pi. 

 1 1, figs. 6a-6d. 



41279. Leperditia caecigena frankfortensis Ulrich. Cotypes. 



Trenton (Ord.). Frankfort, Kentucky. 



Ulrich, Journ. Cincinnati Soc. Nat. Hist., XIII, 1890, p. 177. 



41359. Leperditia crepiformis Ulrich. Cotypes. 



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



Ulrich, Journ. Cincinnati Soc. Nat. Hist., II, 1879, p. 10, pi. 7, 

 ngs. 3, 3a. 



=Jonesella crepidiformis. 



17448. Leperditia ( Isoxys ) dermatoides Walcott. Holotype. 



Lower Cambrian. Washington Count} 7 , New York. 



Walcott, Amer. Journ. Sci. (3), XXXIV, 1887, p. 192, pi. 1, figs. 

 13, 13a; Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 626, pi. 

 80, figs. 1, ia. 



41 3 15. Leperditia (? Primitia) dorsicornis Ulrich. Holotype. 



Richmond (Ord.). Savannah, Illinois. 



Ulrich, Amer. Geol., X, 1892, p. 267, pi. 9, figs. 24-26. 

 = Leperditella dorsicornis. 



41263. Leperditia fabulites (Conrad). Plesiotypes. 



41267. Stones River (Ord.). Beloit, Wisconsin; Lebanon, Ten- 



nessee. 



Ulrich, Jour. Cincinnati Soc. Nat. Hist., XIII, 1890, p. 173, pi. n, 

 figs ia-id; 2. 



