357 



LONCH. 



attached to the back of the headpiece, projecting backward 

 along the middle line of the body ; from the Third Trilohite 

 hed^ Miniskah river. — Potsdam^ L 



Lonchopteris oblongus, Fontaine. {Archostichites oblon- 



Font. US. Bull. 6. ^'''*-'NA.-^Ow*,:;^>^ ^/.49, 



gus^ Emmons, Am. Geol., p. 101, plate 4, f, 6, 8), U. S. G. S. 

 Volume 6, 1883, page 103, plate 49, fig. 1, summit of a frond; 

 1 a, tnucTi enlarged.^ pinnule. Much like Z. virginiensis^ with 

 a slight difference of nervation. At Ellington's, Va. — Trias. 



Lonchopteris virginiensis. Fontaine, Older Triassic 

 Flora of Va. U. S. G. S. Vol. 6, p. 53, pi. 29, f. 1, part of frond 

 with normal rounded pinnules ; 1 ^, magnified pinnule showing 

 nervation. (Omitted: 2, pinnae with acute pinnules; 3, with 

 largest pinnules ; 4, with broad rounded pinnules ; PL 28, f. 1, 

 summit of large frond ; 1 a^ enlarged pinnules ; 2, pinna with 

 long sharp pinnules.) Must have been a splendidly large fern, 

 rather variable, more like the Carboniferous Ferns than any- 

 other. Like Z. rugosa^ Bgt. of France, and Z. rohlii^ Andr. of 

 Aix la Chapelle. Most like Z. (Acrostichides ^^mm.) oilongus. 



