Orthoc. 



560 



Y. Vol. y ii, 1879, page 283, plate 38, f. 3, the original type, pi. 84, 

 1, 4, 9, 10. Marcellus and Hamilton. — Found by I. 0. White 

 in Hemlock township, Columbia Co. Pa., G7,76,.^30, near top of 

 Marcellus. Also in Marcellus limestone at Huntingdon (T3, 115)' 

 in Hamilton lower shales., Coffee run railroad quarry (p. 112) ; 

 in top beds of Genesee.^ Piney ridge, McConnellstown (p. lOS 

 and 000 spec. 12736). Also at Bloomsburg, Columbia Co. 

 (Spec. 12293) from Hamilton strata. — Also at Dorran's nar- 

 rows. Perry Co. \^ specimen 12549) from Hamilton upper 

 shale. — VIIT 5, c, e. * 

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



75, plate 7, fig. 4. Nearly all specimens are a little flattened 

 by rock pressure. Rings in two specimens 8 and 9 in the 

 same length. Siphuncle of one an inch thick is a little over 

 three-twentieths of an inch wide. Ring ridges are direct., thus 

 differing from the Niagara species; as also in having striae 

 lengthwise. It tapers less than the ringed Hamilton species. 

 — Schoharie grit.. East N. Y. VII h. — In Pennsylvania, found 

 at Dingman's Falls, Pike Co. Spec. 808-18 (small fragment) 

 " from Hamilton strata^^ VIII c. [possibly from a lower out- 

 crop and mislabelled.] 



Orthoceras trentonense. See Cyrtocerastrentonense. lie. 



Orthoceras vertelrale. See Orthoceras olorus. II c. 



Orthoceras turbidum, H. & W. Pal. Ohio, Vol. 2, 1875, 



filly iiiiriilW#ir'T'T1riiiiiili^^ page 100, plate 



' ' '3, fig. 1, side 



view of unique 

 and therefore 

 type s p e c i - 



James' Coll, 

 at Cincin nati 

 from the Hud- 



