FOSSIL PLANTS. 87 
This latter character may not, however, be a constant feature, as Schenk 
gives a figure of one specimen’ in which the ribs seem to be rounded. 
More material must be obtained before much can be said about the 
botanical character of these specimens, but they possess much geological 
interest from their evident similarity to those with which I have compared 
them, and their occurrence at the same horizon confirms the testimony of 
other fossils as to the Rheetic age of our sandstones. 
ScHIZONEURA PLANICOSTATA Rogers, sp. 
Portions of the stems of this plant, so common in the Triassic rocks 
of Virginia, are occasionally met with in New Jersey, Connecticut, and 
Massachusetts. 
This was first described by Prof. W. B. Rogers as a Calamites, of 
which it has very much the aspect, indeed, specimens of Calamites Cistii, 
Brong., from the Coal Measures could hardly be distinguished from the 
plant under consideration in some stages of preservation. 
Professor Fontaine, in the Monograph cited (p. 14), has described this 
plant from far better specimens than any which occur at the north, and has 
given reasons for uniting it with Schizoneura of Schimper. Certainly the 
stems bear a close resemblance to those of the group of plants which have 
been described by Schimper, Schenk, Nathorst, and others, and found in the 
Trias and Lias of Europe. But we have never seen any foliary appendages 
which come very near to those of S. paradoxa figured by Schimper and 
Mougeot in their monograph on the fossil plants of the Grés Bigarré. It 
is probable that the leaves were narrowly linear, somewhat like those of 
Schizoneura Virginiensis Fontaine, and were deciduous like the foliary ap- 
pendages of Calamites, which are so rarely found in connection with the 
stem. The only interest that attaches to the imperfect specimens yet found 
in the northern Triassic basins comes from the evidence they furnish of 
a close relationship between the deposits which contain them and those of 
Virginia. 
1Op, cit., pl. VIII, fig. la. 
