394 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



135129. Mazzalina inaurata oweni (Dall). Plesiotype. 



Eocene. White Bluff, Arkansas River, Arkansas. 



Harris, Ann. Rept. Geol. Surv. Arkansas, 1894, Pt. II, p. 165, 

 pi. 7, fig. 1. 



135 103. Mazzalina oweni Dall. Cotypes. 



Middle Eocene. White Bluff, Jefferson County, Arkansas. 



Owen, Second Geol. Rept. Arkansas, i860, p. 35, pi. 9, fig. 1 (as 

 Fusus sp. ). — Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, 

 Pt. I, 1890, p. 105; ibid., Pt. II, 1892, p. 233. 



217 14. Medlicottia copei White. Cotype. 



Permian. Military crossing of the Big Wichita, Baylor 

 County, Texas. 



White, Amer. Nat., XXIII, 1889, p. 117, pi. 1, figs. 1-3; Bull. 

 No. 77, U. S. Geol. Surv., 1891, p. 19, pi. 2, figs. 1-3. — Smith, 

 Mon. XLH, U. S. Geol. Surv., 1903, p. 48, pi. 22, figs. 1-3. 



14929. Medusina costata (Torell). Plesiotype. 



23891. Lower Cambrian. Lugnas, Sweden. 



Walcott, Mon. XXX, U. S. Geol. Surv., 1898, p. 49, pi. 28, figs. 

 3-30, 4; pi. 29, fig. 2. 



See Medusites lindstromi. 



26099. Medusina deperdita Beyrich. Plastotype. 



Jurassic. Eiehstatt, Germany. 



Walcott, Mon. XXX, U. S. Geol. Surv., 1898, p. 91, pi. 44, fig. 1. 



26307. Medusina radiata (Linnarsson). Plastotype. 



Middle Cambrian. Bohemia. 



Walcott, Mon. XXX, U. S. Geol. Surv., 189S, p. 58, fig. 16. 



14929. Medusites lindstromi Walcott. Cotype. 



Lower Cambrian. Lugnas, Sweden. 



Walcott, Tenth Ann. Rept. U. S. Geol. Surv., 1890, pi. 56, fig. 1. 

 = Medusina costata. 



6546. Meekella striato-costata (Cox). Plesiotypes. 



Upper Carboniferous. Nebraska City, Nebraska. 



Meek, Final Rept. U. S. Geol. Surv. Nebraska (Hayden), 1872, 

 p. 175, pi. 5, figs. I2a-c. 



921S. Meekella striatocostata < Cox ). Plesiotypes. 



Upper Carboniferous. Southern Jowa. 



White, Rept. U. S. Geogr. Surv., W. 100th Merid., IV, Pt. I, 1876, 

 p. 126, pi. 9, figs. 4a-4e. 



8185. Meekoceras aplanatum White. Cotypes. 



Triassic. Fifteen miles southeast of John Grays Lake, 

 southeastern Idaho. 



White, Twelfth Ann. Rept. U. S. Geol. Surv. Terr., Pt. I, 1883, 

 p. 1X2, pi. 31, figs. ia-d. 



