819 



Ftero. 



I r /dc* 



closer. Resembles the Indian P, rajmalialensis^ Morris, and 

 the Sonora P, delicatulum^ Newb. Found only at Midlothian, 

 Va., and only a few specimens, all on one standstone slab. — 

 Trias. 



Pterophyllum decussatum, {Pterozamites decussatus^ 

 '^^^E^^~^ Emmons. Am. Geol. pi. 3, fig. 1.) Fon- 



~ ~" ^ taine's Monogr. U. S. Geol. Sur. Vol. 6, 



1883, page 67, plate 43, fig. 2, insertion 

 Font u'.s.Buif 6. Pi-^A of two leaflets, found as a small frag- 

 ment in the Cumberland area in Virginia, in black shale of the 

 horizon of the RiGhmond coal heds. — Trias. 



Pterophyllum insequale, Fontaine. Monog. U. S. Geol. 

 Sur. Vol. 6, 1883, plate 36, fig. 1, normal leaf; IS magni-fted 

 leaflet from lower part ; Ic, ditto from near summit of pinna. 

 The sudden abbreviation of leaflets towards summit of leaf, 

 and irregular intermingling of leaflets of diff'erent widths, are 

 seen in no other Pterophyllum known to me. (Fontaine,) 

 Midrib fleshy, with thick skin. Resembles the Swedish Rhmtic 

 P. oequale., Nathorst; and the German Lower Lias P. longifo- 

 Hum., Andrae ; a good deal like Heer's Triassic P. longifoliurn^ 

 Brongt.; also Emmons' Pterozamites decussatus. Only two 

 specimens found, on one slab, upper small coal bed series. 

 Clover Hill, Va. — Trias. {See figure on, page 820,) 



Pterophyllum pectinatum, {Pterozamites pectiiiatus^ 



fii.SS 



Emmons, page 117, fig. 84 ) Fontaine. Monograph U. S. Geol 

 Sur. Vol. 6, 1883, p. 112, plate 53, fig. 4. Very like the Ger- 

 man Wealden P. hjellianum^ Dunker. — N. C. Trias. 



