102 THE OLDER MESOZOIC FLORA OF VIRGINIA. 



Besides these he gives some fragments, which, as they do not appear to 

 have any definite character, I omit in this list. 



Pecopteris falcatus. 

 Plate XLVIII, Figs. 0, 7. 

 Emmons's "Am. Geol.", plate 4, figs. 5,9, p. 100. 



" Frond large, pinnate or bipmnate ; secondary racliis smooth, channeled, leaflets 

 long, rather distant than approximate, obtuse, falciform, and slightly prostrated at 

 base, and adherent to the whole midrib; midrib distant (distinct?) to the apex; side 

 veins go off at an acute angle, and fork once, and also twice ; sori round and in two 

 rows, with from 12 to 17 in a row. The standing of the leaves varies as to closeness. 

 Occurs at Ellington's, 4 miles from Lockville. Fig. 5 seems to be closely allied to P. 

 falcatus. It may be a barren frond. It might be denominated P. falcatus var. 

 variabilis? 



It is quite clear, I think, that the pinna depicted in Emmons's plate 4, 

 fig. 5, is the sterile form of the plant whose fertile form is given in plate i, 

 fig. 9. The plant is probably a Laccopteris, and is near to Laccopteris 

 Munsteri, Schenk, from the Rhsetic of Europe, although it seems to be spe- 

 cifically distinct. It might properly be called Laccopteris Emmonsi. 



Pecopteris Carolinensis 

 Plate XLIX, Figs. 11,12. 

 Emmous's "Am. Geol.", tig. 68, ami plate 4, figs. 1,2, p. 100. 



" Frond, large pinuate ; leaflets long, tapering beyond their middle, subacute, close, 

 apices only seem to be free, slightly dilated at base ; side veins going off at an acute 

 angle, dividing once or twice. Fructification spots arranged singly and in a row on 

 each side of the midrib, large, round, scolloped, radiate and elevated in the middle. 

 Fig. G8 represents a leaflet enlarged. The leaflets of this fern are more than an inch 

 long, thin and delicate, and they taper from near the middle to an obtuse point. Frag- 

 ments only of this large fern have been found, some of which are 6 or 7 inches long. 

 It might be mistaken for the preceding, the sori, however, are unlike it. Occurs at 

 Ellington's." 



I cannot understand why Dr. Emmons contented himself with giving 

 only a single enlarged pinnule of this plant for the sterile form, and a small 

 fragment of a fertile pinnule, when he had fragments G to 7 inches long. 

 It is of course impossible with these figures to get any idea of the fccies of 

 the plant. It is clearly a Laccopteris, and most probably is identical with 

 Laccopteris elegans, Presl. If not, it should be called Laccopteris Carolinensis. 



Pecopteris bullata, Bunbury. p. 101. 



Dr. Emmons copies Bunbury's figures, and gives his description of the 



