454 . PALEONTOLOGY OF ILLINOIS. 



and more marked, and forming deep furrows in the old part oi 

 the trees. Vascular scars central, round or oval, irregular, 

 without appendages and tubercles. This species is from Car- 

 roll's place, like the former. It is distantly related to Lepido- 

 dendron Garpentieri, Gopp., and like both the following species 

 belongs to the section of the Aspidarice. Chester group. 



Lepidodendron radicans, Sp. nov. PI. 46, fig. 1. Cicatrices 

 large, irregularly oval, very obtuse on the sides, pointed or 

 somewhat narrowed and continuous at both ends; vascular 

 scars central, generally eccentrical on one side of the cicatrices, 

 obliterated by irregular, deep, large striae or narrow ribs, appa- 

 rently the marks of flattened rootlets. The species has some 

 relation with Caidopteris macrodiscus, Sternb., but in one speci- 

 men the scars are continuous and have the spiral portion of 

 the cicatrices of Lepidodendron. I found this specimen at 

 Duquoin. It belongs to the State Cabinet. 



Lepidodendron simplex, Sp. nov. PI. 45, fig. 5. Cicatrices 

 narrowly elliptical, acuminate at both ends, continuous, sepa- 

 rated only by narrow, linear margins, entirely naked and 

 smooth ; vascular scars central, rhomboidal, very obtuse above, 

 narrowed at the sides and also at the obtuse base; marked by 

 three equal points. No traces of appendages, or tubercles, or 

 crown. 



This species is nearly related to Lepidodendron rimosum, 

 Sternb., differing essentially by the cicatrices being closely 

 placed, not separated by broad, wrinkled margins, and the scars 

 obtuse (not angular) . The leaves of this species are narrow, 

 as seen in the figure, of the same breadth as the leaves of Lepi- 

 dodendron rimosum. I have figured one leaf as it appears 

 attached to the stem; but this appearance might be deceptive. 

 The leaves, fig. 6 and 7, also leaves of another species of Lepi- 

 dodendron, are abundantly found in the shales of the same 

 coal bank. 



