462 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



17443. Orthis salemensis Walcott. Cotype. 



Dower Cambrian. Near Salem, Washington County, New 

 York. 



Walcott, Amer. Journ. Sci. (3), XXXIV, 1887, p. 190, pi. 1, figs. 

 17, 17a; Tenth Ann. Rept. U. S. Geol. Surv., 1890, p. 612, 

 pi. 72, figs. 6, 6a. 



= Billingsella salemensis. 



35214. Orthis (?) sandbergi Winehell. Plesiotypes. 



Gallatin (Upper Cambrian). Elk Pass, Yellowstone Na- 

 tional Park. 



Walcott, Mon. XXXII, Pt. II, U. S. Geol. Surv., 1899, p. 452, 

 pi. 61, figs. 2, 2a-d. 



= Billingsella (Otusia) sandbergi. 



17885. Orthis subjugata Hall? Plesiotypes. 



17891. Richmond (Ord.). Three miles above Savannah, Illinois. 



Owen, Rept. Geol. Surv. Wis., Iowa, and Minn., 1852, pi. 2 B, 

 figs. 4, 5, (?9). 



= Hebertella occidentalis. 



35455. Orthis (Dalmanella) testudinaria Dalman. Plesiotypes. 



Trenton (Ord.). Maury County, Tennessee. 



Hayes and Ulrich, U. S. Geol. Surv., Folio 95, 1903, illustration 

 sheet, fig. 43. 



= Dalmanella testudinaria. 



17246. Orthis testudinaria Dalman. Plesiotype. 



Upper Pogonip (Ord.). Bast of Hamburg Mine, Eureka 

 District, Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 72, pi. 11, figs. 

 10, 10a. 



= Dalmanella testudinaria. 

 See Orthis disparilis. 



9346. Orthis thiemii White. Plesiotype. 



Kinderhook (Miss.). Burlington, Iowa. 



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

 p. 164, pi. 41, fig. 4d. 



= Rhipidomella thiemii. 



17252. Orthis tricenaria Conrad. Plesiotype. 



17253. Upper Pogonip (Ord. ). Eureka District, Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1S84, p. 74, pi. 11, figs. 

 4, 4a. 



13784. Orthis tulliensis Yanuxem. Plesiotype. 



Middle and Upper Devonian. Eureka District, Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 18S4, p. 115, pi. 2, figs. 

 12, 12a. 



= Schizophoria tulliensis. 



