Ptero. 



818 



Pteronites spinigerus (Avicola spinigera). Hall, page 

 I ^. 262, fig. 117, 4. (Conrad, Jour. Acad. Nat. Sci., 



Philada. Vol. 8, 1842, page 237, pi. Ixii, fig. 3.) 

 Chemung. VIII g. 



Pteronites ? in Hamilton sandstone., Perry Co., Ram- 

 bo's (Spec. 107-5) ; and in Huntingdon Co., Rough and Ready 

 (Spec. 107-5). — VIII G. — In Chemung shales.^ Pike and Mon- 

 roe Co. (G6, 105). — In Chemung- Cat skill., Panama or leBoeuf 

 conglomerate., the Third Oil sand of Erie Co., a Pteronites is 

 both abundant and characteristic (Q4,110, 249). — In the First 

 Oil Sand in Crawford Co., there is a Pteronites of Chemung 

 t-yp^ (Q4, 102). In the Devonian strata, on the anticlinals 

 in the gaps of the Conemajagh and Youghiogheny rivers in 

 Fayette and Westmoreland, is a Pteronites (K3, 311). — VIII 

 c; VIII g; X? 



Pterophyllum afB.ne, Nathorst. Fontaine's Monogr. U. 



E'ontajne * *" ' " » »" ■' U.S. Bui I. G PI 32 



S. Geol. Sur. Vol. 6, 1883, page 0^^, plate 32, fig. 3, fragment of 

 leaf with average sized leaflets. (Other figures show larger 

 and smaller leaflets.) Only diff*erence from the Swedish plant 

 is that it sometimes grew to a larger size, and its leaflets are 



