517 



Orthis. 



Orthis hipparionyx. {Atrypa imguiformis^ Conrad ; Hip- 



paHonyx proximus^ 

 Van.) Hall, p. 149, 

 fig. 60, 4. Vanuxem, 

 p. 124, fig. 4. Rogers, 

 p. 826, fig. 651. Oris- 

 kany formation^ VI L 

 00, p. 235, specimens 

 701-2 (six), 701-8 

 (three), 703-1 (five), 

 703-4, 703-9, in col- 

 lections from Hunt- 

 ingdon Co., in the 

 # Three Springs railway 

 cut; at the ends of 

 Royer's and Sandy 

 ridges, (T, 35; T3, 

 119) all from Oriskany 

 sandstone. See, also, Cat. 

 000, p. 130, Claypole's 

 spec. 11,833 from various 

 outcrops in Perry Co. Also 

 on Broadhead's creek, Mon- 

 roe Co. (G6, p. 124.) — 

 VIL 



R.65I. 



Orthis hybrida, Sowerby. Figures]:from Collett's Indiana 



Rt. 1881, p. 284, pi. 21, 

 fig. 18, dorsal view of 

 specimen of usual form 

 and size ; 19, ventral ; 

 20, dorsal, unusually 

 large specimen ; 21, side 



