551 



Orthoc. 



Orthoceras (Oyrtoceras?) hector. Hall. Pal. N. Y. Vol. 



plate 90, fig. 13 (selected 

 from figs. 11 to 15,) 

 showing curvature and 

 obliquity of suture lines. 

 From Upper Chemung f 

 south of Olean. N. Y. 

 that is, in McKean Co 

 Pa. Compare specimen 

 883-29, in Howell's coll. 

 at Nichols, Tioga Oo.,N. Y. (00, p. 238) from Chemung, VIII g. 



Orthoceras hyas, Hall. 15th Annual Report. 1862, page 



1/^/^'--. ^ ^ ^^.,3x>.^^ 75, plate 7, fig. 5. Largest diameter 1 



inch, of this unique specimen, found 

 associated with 0, thoas in Schoharie 

 grit. VII h. 



Ji^it. 



^3//. /S/-/f. /Jr' p,^ 



Orthoceras imbricatum. Rogers, page 823, fig. 636. 

 (Sowerby, 1839, Murchison's Silurian system.) In Pennsyl- 

 vania, found by the First Geological survey in Clinton 

 strata. V a. 



Orthoceras jamesi, Hall and Whitfield, in Newberry's 



ycL... 



Pal. Ohio, Vol. 2, 1875, page 118 

 pi. 5, fig. 13, enlarged three 

 diameters — Clinton, Va. 



Orthoceras Iwve. See O. snblaeve. V c. 



Orthoceras lamarcki, Billings. Geol. Canada, 1863, page. 



/(r- 



Geol, CcuncLt 

 121, figs 38 a, b. c. Calcif''erous sandstone. II a. 



Si 



