892 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Orthis hippolyte Billings. 



Orthis hippolyte Billings, Pal. Fossils, 1, 1865, p. 81, fig. 73; p. 218 (adv. sheets, 



1862). Hall and Clarke, Pal. New York, 8, pt. 1, 1892, pp. 217, 221, 228. 

 Orthis hippolyte? Meek, 6th Ann. Hep. U. S. Geol. Surv. Terr., 1873, p. 464. 

 Canadian: Point Levis and Phillipsburg, Quebec; Cow Head, Newfoundland; 



nearMalade City, Utah. 



Orthis(?) holstoni Safford. 



Orthis? holstoni (Safford MS.) Hall and Clarke, Pal. New York, 7, pt. 1, 1892, 

 pp. 218, 340, pi. 5A, figs. 35-37; 48th Hep. New York State Mus., 2, for 1895, 

 1897, p. 339, pi. 4, figs. 19-21; 14th Rep. State Geol. New York for 1894, 

 1897, p. 339, pi. 4, figs. 19-21. Wysogorski, Zeits. d. d. geol. Gesell., 52, 1900, 

 p. 227, footnote. 



Chazyan (Ottosee) : Near Knoxville, Tennessee. 



Orthis humboldti D'Orbigny. 



Orthis Humboldtii D'Orbigny, Voyage PAmerique Merid., 3, pt. 4, 1842, p. 27; 



ibid., 8, Atlas, 1847, pi. 2, figs. 16-20. Schuchert, Bull. U. S. Geol. Surv., 



87, 1897, p. 287. 

 Silurian: Rio Grande, Province de Valle Grande, Bolivia. 



ORTHIS HURONIENSIS Castelnau. See Rafinesquina alternata. 

 ORTHIS HYBRIDA Sowerby. See Rhipidomella hybrida. 



Orthis Ignlcula Raymond. 



Orthis disparilis Billings (not Conrad), Canadian Nat. Geol., 4, 1859, p. 440, figs. 



20 a, b. 

 Orthis ignicula Raymond, Amer. Jour. Sci., 20, 1905, p. 369; Ann. Carnegie Mus., 



7, 1911, p. 236, pi. 35, figs. 5-7, figs. 10, 11. 

 Chazyan (Crown Point): Valcour Island, New York. 



ORTHIS IGNOTA Sardeson. See Dalmanella ignota. 

 ORTHIS IMPERATOR Billings. See Hebertella imperator. 

 ORTHIS INCURVATA Castelnau. See Strophomena incurvata. 

 ORTHIS INFLATA? James. See Platystrophia acutilirata senex. 

 ORTHIS INSCULPTA Hall. See Hebertella insculpta. 



Orthis Interpllcata Foerste. 



Orthis interplicata Foerste, Bull. Sci. Lab. Denison Univ., 14, 1909, p. 76, pi. 3, 



fig. 44. 

 Clinton (Osgood): New Marion, Indiana. 



ORTHIS INTERSTRIATA Hall. See Schuchertella interstriata. 



ORTHIS IPHIGENIA Billings. See Dinorthis (Plaesiomys) iphigenia. 



ORTHIS JAMESI Hall. See Plectorthis jamesi. 



ORTHIS (PLECTORTHIS) JOHANNENSIS Walcott. See Eoorthis johannensis. 



ORTHIS JUGOSA James. See Dalmanella meeki. 



ORTHIS KANKAKENSIS McChesney. See Plectorshis (Austinella) kankakensia. 



ORTHIS KASSUB^B Winchell. See Pianodema subaequata perveta. 



ORTHIS KENNICOTTI McChesney. See Dinorthis carleyi. 



