896 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



ORTHIS PORRECTA Sardeson. See Dalmanella porrecta. 



ORTHIS PROA VITA Winchell and Schuchert. See Dinorthis proavita. 



Orthls (Dalmanella?) pumlla Ulrich. 



Orthis costata Hall (not Sowerby), Amer. Jour. Sci., 48, 1845, p. 295. Miller, 



Cincinnati Quart. Jour. Sci., 2, 1875, p. 33. 

 Orthis pumila Ulrich, Catalogue Cincinnati Foss., 1880, p. 14. 

 Orthis cincinnatiensis Miller, Amer. Pal. Fose., 2d ed., 1883, p. 296. 

 Maysville (Corry ville) : Cincinnati, Ohio. 



Orthis(?) punctostriata Hall. 



Orthis punctostriata Hall, Pal. New York, 2, 1852, p. 254, pi. 52, fig. 5. 

 . Orthis? punctostriata Hall and Clarke, ibid., 8, pt. 1, 1892, p. 217, pi. 20, figs. 2-4 

 Grabau, Bull. New York State Mus., 45, 1901, p. 186, fig. 95; Bull. Buffalo 

 Soc. Nat. Sci., 7, 1901, p. 186, fig. 95. 

 Clinton (Rochester): Lockport and Lewiston, New York. 



ORTHIS PYRAMID ALIS Hall. See Scenidium pyramidalis. 



ORTHIS RETRORSA Salter. See Dinorthis (Plaesiomys) retrorsa. 



ORTHIS RETRORSA Billings. See Dinorthis carleyi. 



ORTHIS RHYNCHONELLIPORMIS Shaler. See Rhipidomella uberis rhynchonelliformis. 



ORTHIS ROGATA Sardeson. See Dalmanella rogata. 



Orthis(?) rugiplicata Hall and Whitfield. 



Orthis rugseplicata Hall and Whitfield, 24th Rep. New York State Cab. Nat. Hist., 

 1872, p. 182; 27th Rep., ibid., 1875, pi. 9, figs. 1-3. Hall, 2d Ann. Rep. New 

 York State Geol., 1883, pi. 34, figs. 25-27. Nettelroth, Kentucky Fossil 

 Shells, Mem. Kentucky Geol. Surv., 1889, p. 44, pi. 27, figs. 1-3. 



Orthis rugiplicata, Hall and Clarke, Pal. New York, 8, pt. 1, 1892, p. 217. 



Niagaran (Louisville): Louisville, Kentucky. 



ORTHIS RUIDA Billings. See Dalmanella? ruida. 



Orthis(?) saffordi Hall and Clarke. 



Orthis? saffordi Hall and Clarke, Pal. New York, 8, pt. 1, 1892, pp. 218, 340, pi. 

 5A, figs. 38-40; 48th Rep. New York State Mus., 2, for 1895, 1897, p. 340, pi. 4, 

 figs. 10-12; 14th Rep. State Geol. New York for 1894, 1897, p. 340, pi. 4, figs. 

 10-12. 



Chazyan (Ottosee): Near Knoxville, Tennessee. 



Orthis? saltensis Kayser. 



Orthis saltensis Kayser, Beitr. Geol. Pal. Argentin. Rep., Palaeontographica 

 Suppl., 3, 1896, p. 8, pi. 1, fig. 16; Zeits. Deutsch. Geol. Gesell., 49, 1897, p. 

 280. Hoek, Neues Jahrb. Min., Geol. Pal., 34, 1912, p. 219. 

 Lowest Ordovician: Salta, etc., Argentina. 



ORTHIS SCOVILLI Hall and Clarke. See Plectorthis (Austinella) scovilli. 

 ORTHIS(?) SECTOSTRIATA Ulrich. See Plectorthis (Encuclodema) sectostriata. 

 ORTHIS (SCHIZOPHORIA) SENECTA Hall and Clarke. See Schizophoria senecta. 

 ORTHIS SINUATA Hall. See Hebertella occidentalis sinuata. 

 ORTHIS (DALMANELLA) SMITHI Clarke. See Dalmanella smithi. 



