58 PP. REPORT OF PROGRESS. FONTAINE & WHITE. 



Habitat — Roof -shales of the Waynesburg Coal, Cassville, 

 W. Va., and at Bellton, 400 feet above the Waynesburg 

 Coal. 



Callipteridium grandlfoUum, Sp. nov., PL XY, Figs. 

 1-4, and PI. XVI, Figs. 2^. 



(Frond, tripinnate ; primary rachis, strong and ro'^:gh ; 

 secondary pinna3, going off at an acute angle, alternate, 

 approximate, linear-lanceolate in outline ; pinnules, closely 

 placed, quite variable in shape, but normally oblong, often 

 passing into elliptical forms more or less broad, slightly 

 narrowed by being cut away on the upper side of the base, 

 and rounded on the lower side, obtusely rounded at the 

 end, separate except towards the summit of the frond and 

 pinnae, alternate ; those of the lower part of the plant, 

 slightly round-lobed, the lobing irregular in the number of 

 lobes on different sides of the same pinnules and on adja- 

 cent pinnules ; terminal lobes of the pinnge, round-ellipti- 

 cal and united with the adjacent pinnules ; pinnules to- 

 wards the summit of the frond becoming more united and 

 smaller, so that the ultimate pinnae grow shorter and less 

 deeply lobed and finally pass into pinnules of the normal 

 kind ; lower pinnule on the lower side of the pinnae usu- 

 ally inserted half on the secondary rachis; lower pinnules 

 on the upper side of the ultimate pinnae often somewhat 

 heteromorphous ; ( Figs. 3 and 4), mid-nerve, strong to- 

 wards the base and splitting up towards the end ; lateral 

 nerves, rising at a very acute angle, forking near the inser- 

 tion and again about the middle of the lamina, arching off 

 suddenly and strongly and passing with the branches 

 nearly parallel so as to meet the margin at nearly a right 

 angle, several nerves passing from the secondary rachis ; 

 fructification composed of elongate sori, j)la.ced on or be- 

 tween the branches of the lateral nerves, and extending 

 nearly frt)m the mid-nerve to the margin of the pinnule.) 



This plant, from the great size and width of its pinnules, 

 its numerous nerves, and vanishing mid-nerves, at first sight 

 might be taken for a Neuropteris, but it clearly belongs to the 

 genus Callipteridium. From the size, and arrangement of 



