442 
PALAEONTOLOGY OF ILLINOIS. 
squarely cut at the base, and without auricles ; pedicel of the 
sporange narrow, lanceolate pointed, one-fourth of an inch 
long. In its length it corresponds exactly to the distanbtTbe^ 
tween the border of the axis and that of the line of circumfer¬ 
ence of the cone. The sporanges are obscurely marked on the 
stone, mixed with pyrites, but I could not detect any spores. 
Lepidostrobus lancifolius, Sp. nov. 
PI. xxxi, fig. 7. 
A small, apparently narrow cone. The pedicel of the spo¬ 
ranges, fig. 7 b, is very short, broadly wedge-shaped, obtusely 
truncate at its base; blade one inch long, slightly enlarged in 
the middle, tapering into an acute point, with slightly diverg¬ 
ing acute auricle at the base ; medial nerve sharply marked. 
On a concretion from Mazon creek. 
Lepidostrobus truncatus, Sp. nov. 
PI. xxxi, fig. 5. 
Cone less than one inch long, round ovate, obtuse, truncate 
at the base, with densely imbricated, short, lanceolate spho- 
rophyllm (blades). None of these can be distinctly seen, being 
compressed against the cone. 
In a concretion from Mazon creek. 
Lepidostrobus conniyens, Sp. nov. 
PI. xxxi, fig. 6. 
Cone small, ovate obtuse, of the same size as the former, 
with long, narrow, linear lanceolate sporophyllai; blade as 
long as the cone, curved at its top and covering it. 
