FOSSIL PLANTS. 407 



the reverse. They apparently belong to the same species, and seem to have 

 been detached before maturity from their pedicels, whose remains are still 

 marked by dark lines, fig. 8, fig. 9, enlarged twice, and fig. 10, enlarged about 

 ten times. In this last figure dark but absolute lines are seen, apparently show- 

 ing the suture of walls. In the pinnately divided part of the frond, fig. 6, ah 

 the sori are opened, and their envelope is still attached to short pedicels, appa- 

 rently placed opposite to each other. The details of the form of the sporanges 

 are easily recognized, but those of their ramifications, or the point and mode of 

 attachment of the sori are rendered indistinct by the superposition of the groups 

 of sporanges. The specimen is on shale from Morris, and was contributed by 

 Mr. Jos. Even. 



STAPHYLOPTERIS SAGITTATUS, Sp. nov. 



PI. xiv, fig. 3 to 5. 



THIS species has a bi-pinnate frond, as seen on a specimen 

 from the shales of the coal at Morris, too large to be figured. 

 The divisions are alternate ; the thick secondary rachis is de- 

 current on the main stem, which is also broad and smooth. 

 The double celled sporanges are linear, attached by their backs, 

 and pressed against each other in horizontal rows. The en- 

 larged pedicel of the sporange cells is, before maturity, appa- 

 rently at least, folded in the middle, and both rows of spo- 

 ranges are joined together by their back., forming in that state 

 slightly scythe-shaped cylinders, obtuse at both ends, attached 

 to the pedicel by a dorsal membrane, and marked all around 

 by the ring-like outlines of sporanges (fig. 3a). More gener- 

 ally the sporange-cells are open side by side on each side of the 

 dorsal support, and the sporanges appear then in two convex 

 rows, fig. 4 and 5. In some specimens on concretions from 

 Mazon creek, where small branches of this remarkable species 

 are finely preserved, the sori or sporange bearing cells are deep- 

 ly immersed in the stone, generally leaving around them an 

 empty space, as seen in fig, 3ft and 3c; they are thus isolated 

 and their form is easily ascertained. No traces of leaflets 

 have been seen in connection with this species, which has as 

 yet been obtained only from Morris and from Mazon creek. 



