394 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



135 1 29. Mazzalina inaurata oweni (Dall). Plesiotype. 



Eocene. White Bluff, Arkansas River, Arkansas. 



Harris, Ann. Rej^t. Geol. Surv. Aikansas, 1894, Pt. II, p. 165, 

 pi. 7, fig. I. 



1 35 103. Mazzalina oweni Dall. Cotypes. 



Middle Kocene. White Bluff, Jefferson County, Arkan.sas. 



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

 Fiisus sp. ). — Dall, Trans. Wagner Free Inst. Sci. Pliila., Ill, 

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



217 14. Medlicottia copei White. Cotype. 



Permian. Military cro.ssino^ of the Big Wichita, Baylor 

 County, Texas. 



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

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

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



14929. Medusina costata (Torell). Plesiotype. 



23891. Lower Cambrian. L,ugnas, Sweden. 



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

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



See Medusites lindstromi. 



26099. Medusina deperdita Beyrich. Pla.stotype. 



Jurassic. liichstatt, Germany. 



Walcott, Mon. XXX, U. S. Geol. vSurv., 1898, p. 91, pi. 44, fig. i. 



26307. Medusina radiata (Linnarsson ). Pla.stotype. 



Middle Cambrian. Bohemia. 



Walcott, Mon. XXX, U. S. Geol. Surv., 1898, p. 58, fig. r6. 



14929. Medusites lindstromi Walcott. Cotype. 



Lower Cambrian. Ltignas, Sweden. 



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



= Medusina co,stata. 



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



Upper Carboniferous. Nebraska City, Nebraska. 



Meek, Final Rept. U. S. Geol. vSurv. Nebraska (Hayden), 1S72, 

 P- 175, pl- 5, figs. I2a-c. 



9218. Meekella striatocostata (Cox). Plesiotypes. 



llp})er Carboniferous. Southern Jowa. 



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

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



8185. Meekoceras aplanatum White. Cotypes. 



Triassic. Fifteen miles .sotitheast of John Grays Lake, 

 .southeastern Idaho. 



White, Twelfth Ann. Rept. IT. S. (>eol. Surv. Terr., Pt. I, 1883, 

 p. 112, pi. 31, figs. la-d. 



