The Genus Sphenophyllum. 27 
That Sphenophyllum was the foliage of Calamites I doubt. In the 
plate which accompanies this paper, fig. 9 represents a large stem 
of Sphenophyllum. It will be seen to be jointed; but not striated 
like Calamites. ‘That all these plants were affiliated, and allied to 
Fiquisetum, seems highly probable, and that some so-called species 
of Asterophyllites were the foliage of Calamites can hardly be de- 
nied, but these had only filiform and no wedge-shaped leaves. 
