Orch)}^. 



568 



In Columbia Co., Pa.? 

 in bed 3 of Fishing 

 Creek section at top 

 of Hamilton (G7, 

 219.)— In Perry Co., 

 Barnett's mill, spec. 

 11732 (5-103J Ham- 

 ilton pr op e r, — In 

 Huntingdon Co., at 

 Huntingdon ; and in bed 22 of the Patterson section, in Ham- 

 ilton upper shale, (T3, 109, 186) ; at Rough and Ready, and 

 on Crooked creek, in Hamilton sandstone (T3, 110, 211); at 

 Grafton, spec. 12858 (243-2) in Hamilton, VIII c.—Ewing 

 finds it in Center Co., (T4, 433,) in Marcellus. Till h. 



Orthonota P Ewing, in Report on Centre Co., T4, p. 



427; in Hudson river shale, Illh, 



Orthonota ? found by Heilprin among the collections 



of the Wyoming Historical Society at 

 Wilkes-Barre, Pa., obtained from 

 the Anthracite measures in that 

 Northern Anthracite coal field. See 

 Geol. Sur. Pa. Annual Report for 

 1885, page plate 446, fig. 17.— X/7/. 



Orthonijchia comta. See Platyceras conica. VIII~1X 



Orthonychia lodiensis. See Platyceras lodiense. X. 



Orthopleurodus carbonarius. {Deltodus anffularis)^ew- 



berryand Wor- 

 then, Geo. Sur. 

 Ill.,Vol.2,1866, 

 page 97, plate 

 9, figs 1, (Bel 

 tod^is ang u- 



laris^) bat k tuoth ot the fish, seen from above. La Salle, 111., 

 coal measures. — Vol. 7, 1883, page 192, (Sandalodus carlona- 

 rius) fig. 6(^, back jaw tooth in left jaw, seen from above and 





