424 
PALEONTOLOGY OF ILLINOIS. 
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Genus ASTEROPHYLLITES, Brgt. 
Ill. Geol. Rep , vol. ii, p. 444. 
Asterophyllites rigidus, Brgt. 
PI. xxi, fig. 4 and 4 b. 
This species has been referred to Asterophyllites longijolius ? Brgt, p. 444, 
vol. ii, of this Report. The whorls of the leaflets, very close to each other, in¬ 
dicate the top of a branch. The leaflets are about three inches long, not quite 
rigid, not open as in A. rigidus, but they are of a hard, solid texture, exactly 
linear, marked in the middle by a deep medial nerve, reflexed on the borders, 
canaliculate on‘the lower surface, thus presenting the true characters of A. 
rigidus as recognized by other and better specimens from the same locality— 
Mazon creek. The true Asterophyllites longifolius, Brgt., has been found on 
shales from Morris, by Mr. Jos. Even. It greatly differs from A. rigidus by 
its leaves, which are soft, flat, scarcely marked by the medial nerve, ascending 
along the stem and undulate, and by the narrower, nearly smooth stems and 
branches. 
! 
Asterophyllites grandis, LI. and Hutt. 
Foss, flora, i, PI. xvii. 
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Found in fine specimens on the shales of the coal at Morris. Leaves still 
narrower, and whorls still more numerous than indicated by the description 
and plate of the English authors. 
Asterophyllites foliosus, LI. and Hutt. 
Foss, flora, i, PI. xxv. 
Not rare in the concretions of Mazon creek. 
Asterophyllites tuberculatus, Brod., p. 159. 
In the shales at Morris. 
