Neur. 



458 



The nerves branch and become parallel, and correspond with 

 the threads of the fringe. Unlike all known species of 

 Cyclopteris^ it has some affinity with Neuropteris crenulate^ 

 Brgt. The discovery of this fern led Lesquereux to write : 

 "Though we have many species of living ferns with fimbriate 

 margins, it is the first time that a species of this form has been 

 found in a petrified state and from the old formations. But 

 every day the study of fossil remains shows us something new, 

 and teaches us that the primitive organic structures of this 

 world were much more perfect than is generally believed. 

 Truly, each form of being was perfect from the first/' Later, 

 this species was found in Mazon creek nodules, Illinois, (11^ 

 430 ; IV, 384, pi. 6, f. 4) ; abundantly in nodules in Hildreth's 

 Ohio collections at Marietta ; in the Kittanning coal bed at 

 Oannelton, Beaver Co., Pa. ; and in many other collections ; 

 but not in the sub conglomerate measures. — Coal Flora, page 



81, plate 5, figs. 1 to 6. Cyolopteris 

 ftmbriata^ Lesq. Jour. Boston S. N. 

 H. Vol. 6 ; Geol. Pa. 1858, plate 4, 

 figs. 17, 18. Not found in Subcon- 

 glomerate coals ; but abundant from 

 the Conglomerate up to the Salem 

 anthracite bed at Pottsville ; Can- 

 nelton, Pa. ; Charleston, W. Va. ; 

 Mazon creek nodules. 111. ; Marietta nodules, O., etc. Lesq.) 

 Collett's Ind. 1882, p. 52, plate 10, fig. 2, Allegheny series, 

 Coal Measures. XIIL 



Neuropteris fissa. Lesq. Geol. Pa. 1858, p. 857, pi. 3, fig. 



2 ; only a broken leaflet from 

 Pottsville Gate vein, split by 

 pressure ? Like iV. ingens^ 

 Lind.; but nerves thin and 

 close. Allied to Cyclopteria 

 orhicularis. — XIII. Anthra- 

 cite coal measures. — Abun- 

 dant in the Powelton shales, 

 just over the Fulton - Cook 



coal (bed B) on Shoup's run, Broad Top, Huntingdon Co., Pa. 



Also, a few specimens seen in the Barnet (bed A) roof shale 



at the Reed mine, (T3, 62, 278, 313.)— X///. 



