384 L. Lesquereux on the Coal Formations of North America. 
articulated and striated pedicel, having fast the ‘alt form as 
a small branch of Calamites Shou Gar Art. The form of 
those of Asterophyllites. Thus the relation of both genera, @ a 
acters, would be complete. But, even if this aflinity of forms 
was perfectly ascertained, the question concerning the true rela- 
tive place of these plants would not ie eres For the inter- 
nal structure of the Calamites, as far s known, removes 
them evidently from the Dicotyledones id establishes their re 
lation with the Hquisetacee. It is one of those numerous il 
mas offered for a eat to the patience and long re researches 
of the Palzontologis 
American specs do not add much to what was already 
known of the different genera of this group. I have not vee 
in our Coal Measures a single trace of an Hguisetites. I did not ~ 
even suppose that species of this genus could be found in as 
Measures. The beautiful specimens figured and descr 
by Geinitz do not leave any doubt on this question 
There is near Carbondale a forest of standing Calamites im- 
external surface of the stems. ven the coaly matter 
sometimes covers it has disappeared. The fgg are 
Suckowii Brgt., Calamites ornatus Brgt., which Mr. Geinitz ae - 
siders as the same species; Calamiites vissse Bret, and Calt 
matus Art. ‘The size of the stem varies from three 
six —- rarely attaining eight inches. A number of th 
appear to have been crushed upon themselves when still stan® 
for the aes or rather the external surface, is often push "of 
folded within the stem, all around the circumferen ce. This, ‘ ; 
, proves cee 1e stems of the Calamites were hollow cy+# 
