318 PEOCEEDINGS OF THE GEOLOGICAL SOCIETY. [Hay 7, 



36. CoEDAiTES ANGusTiFOLiA, Dawson. 



Leaves linear, much elongated, one-tentli to one-fourtli of an inch 

 hroad, with delicate, equal, parallel nervures. 



This species, originally described frora specimens collected at 

 Gaspe, where it abounds in the roof of the little Devonian coal- 

 seam, occurs also at St. John, and in the Marcellus Shale of New 

 York ; and it has also been found by Sir W. E. Logan in the U;pper 

 Silurian of Cape Gaspe, together with fragments which may have 

 belonged to Psilo^Jiyton. It usually occurs as long riband-like 

 detached leaves, not always easily distinguishable from the flattened 

 stems and roots of other plants found in the same beds. I have not 

 seen the apex nor the base of the leaf, but among Prof. Hall's spe- 

 cimens from the Marcellus Shale is one which appears to consist of 

 the remains of several leaves, attached to a short stem, of which the 

 structure and markings have perished. 



Plants closely resembling this are described by linger and Goep- 

 pert, from the Devonian of Europe ; but the characters given do not 

 enable me to identify any of them with the present species. Such 

 plants are placed by those writers in the genus Noeggerathia, which 

 I reject for the reasons above stated. 



37. COKDAITES (?). PI. XYI. fig. 59. 



One of Prof. Hall's specimens from the Hamilton group is a cast 

 of a stem which appears to have produced closely adpressed clasping 

 leaves, obscurely striated, and widening upward. I refer it to this 

 genus, but cannot determine whether it belonged to either of the 

 species above described or to a third, though perhaps the latter is 

 the more probable supposition. 



38. Megaphyton (?). 



An obscurely marked stem in Mr. Richardson's collection, from 

 Perry, appears to indicate a plant of this genus, but does not afford 

 sufficient characters for description. 



(Filices,') 

 39. Cyclopteeis Halliana, Goeppert. PL XVII. figs. 54, bb. 



Goeppert, ^ Flora Silurisch.' p. 498; S;phenopteris laxa, HaU, ^Eeport 

 Geol. New York,' p. 275, fig. 127. 



The original specimen of this beautiful plant has been submitted 

 to me by Prof. Hall, and corresponds very closely with the figure 

 above referred to, and with Goeppert's description, based on that 

 figure. The nervures, which Goeppert notes as simple or dichoto- 

 mous, are apparently the latter, and the pinnules seem to have been 

 slightly lobed at the margins as in Adiantum. Its densely leafy 

 rachis, with its rich terminal pinnules and delicate drooping lateral 

 pinnse, give it an appearance at once unique and graceful ; while 

 the form, arrangement, and venation of the pinnules are peculiar 



