40>0 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



4809. Orthis hipparionyx Hall. Plastot5^pe. 



Oriskany (Lower Dev-)- Alhaii}- County, New York. 

 Hall, Nat. Hist. New York, Pal. HI, 1S59, p. 407, pi. 90, fig. 6. 

 = Hipparionyx proxinnts. 



13787. Orthis impressa Hall. Plesiotype. 



Middle Devonian. luireka District, Nevada. 



Walcott, Mon. VIII, U. vS. Geol. vSurv., 1SS4, p. 115, pi. 13, fig. 13. 

 = Scliizoplioria impressa. 



24422. Orthis iowensis Hall? Plesioty^pes. 



Base of Upper Devonian. Clear Water River, Mackenzie 

 River Basin, Canada. 



Meek, Trans. Chicago Acad. Sci., I, 1S6S, p. 90, pk 12, figs. 2a-h. 



Probably Orthis { Schizophoria) striatula. 

 See Orthis lentiformis? 



1 79 1 8. Orthis lentiformis Hall? Plesiotype. 



Middle Devonian. Near New Buffalo, Iowa. 



Owen, Rept. Geol. vSiirv. Wis., Iowa, and Minn., 1852, pk 3, figs. 

 10, loa. 



= Young Specimen of Orthis (Schizophoria J striatula. 

 See Orthis iowensis? 



17232. Orthis lonensis Walcott. Holotype. 



Upper Pogonip (Ord. ). L,one Mountain, Nevada. 



Walcott, Mon. VHI, IT. vS. (Teok vSurv., 18S4, p. 74, pi. 11, figs. 6, 6a. 

 = Hebertella (?) lonensis. 



5901. Orthis macfarlanei Meek. Cotypes. 



24421. Base of Uj^per Devonian. Uockhart River and near P'ort 



Good Hope, Mackenzie River, Canada. 

 Meek, Trans. Chicago Acad. Sci., I, 1868, p. 88, pi. 12, figs. la-h. 

 = Schizophoria macfarlanei. 



28152. Orthis ( Dinorthis ) meedsi artica vSchuchert. Cotypes. 



Trenton (Ord. ). Head of iM-obisher Bay, Baffin Land. 



vSchuchert, Proc. U. S. Nat. Mus., XXII, 1900, ji. 157, ])1. 12, 

 figs. 7, 8. 



67ZJ. Orthis michelini nevadensis Meek. Cotyi)es. 



15202. Upper Carboniferous. White Pine County, Nevada. 



Meek, Rept. U. vS. (ieol. I';xi)l. 4i)th Par., IV, Pt. I, 1877, p. 63, 

 pi. 17, figs. i-ic. 



= Rhipidomella nevadensis. 



Orthis musculosa Hall. Plastotyjic. 



Oriskany (Lower Dev.). Coeymans, Albau}- County, 

 New York. 

 Hall, Nat. Hist. N. Y., Pal. TIT, 1859, ]^. 409, i)l. 91, figs. 3a, 3b. 

 = Rhipidomella musculo.sa. 



