Orthis. 



526 



3'a.^« 



tonio Hudson 

 river group. 

 Geology of 

 Canada, 1863, 

 page 210, fig- 

 ures 210 a, J, 

 c, side ventral 

 and dorsal 



views. /// a^ i, — Pal. Ohio, Vol. 1, 1873, page 96, plate 

 9, figs. 3 a^i, c, d, e, dorsal, ventral, front, profile, and hinge 

 view (showing high area and foramen) 3 /", inside ventral; 3 ^, 

 magnified surface; 3 A, inside dorsal. — Cincinnati group., III. 

 — ( Orthis suhjugata ?) Owen's Geol. Wise, Iowa and Minn., 

 1852, pi. 2 B, fig. 4, 5, from the shell beds at the base of the 

 upper magnesian limestone of Wisconsin. //. 



Orthis orthambonites, Pander, as figured by Murchison 



and de Verneuil, in Russia and the Ural Mtns., 

 1845. Geology of Canada, 1863, page 231, 

 fig. 245 a. 5, (?, ventral, dorsal and side views. 

 Quehec group. II? 



Orthis pecosii, Marcon, Geol. N. America, 1858, p. 48, plate 



6, fig. 14. ( Orthis carhonaria^ 



Zl jimmJ^ Swallow, Trans. St. Louis Acad. 



Sci. Vol. 1, 1858, p. 218.) Col- 



lett's Indiana Rt. 1883, page 



lncUiW?3 ^^•^»^Ind.itl^a^^3^ 129, plate 32, figs. 20, 21, 22, 



natural size back, belly and 



