426 PALEONTOLOGY OF ILLINOIS. 



SELAGINI$, Endl. 



GENUS LYCOPODITES, Brgt. 



111. Geol. Kept., vol. ii, p. 447. 



LYCOPODITES ANNULARL&FOLIUS, Sp. nov. 



PI. xxi, fig 5. 



STEM round, as seen in fig. 5 dichotomous, bearing opposite 

 leaves, apparently united by two at the base, half embracing 

 and slightly decurrent ; leaves linear-lanceolate, obtusely 

 pointed, slightly narrowed to the base, marked with a medial 

 nerve, disappearing above the middle, open or slightly reflexed. 



The mode of branching of this species, by a peculiar kind of dichotomy ob- 

 servable in some Lycopodiacest of our time, the Ruelliee, for example, indicates 

 the nature of this peculiar plant. It is not quite evident that the leaves are 

 approached by pairs, and placed in two parallel rows or distichous ; the speci- 

 men shows nothing more definite than what is represented by the figure. 



No species of Lycopodites of the Coal Measures has been as yet published 

 having leaves of the same form and type as ours ; the only one somewhat com- 

 parable to it is Lycopodites macrophyllus, Gold. Flor. Saar., i, p. 12, pi. 1, fig. 5. 



On a concretion from Mazon creek; in the cabinet of Prof. A. H. Worthen. 



LYCOPODITES MEEKII, Sp. nov. 



PI. xxvi, fig. 6 and 6a. 



STEM very slender, about one-sixth of an inch thick toward 

 the base, dichotomous, with continuous, elongated branches, 

 scarcely diminishing upwards ; leaves imbricated all around, 

 narrow, linear, lanceolate, acute, erect, or slightly open and 

 curving upwards at the point. As seen, fig. 60, enlarged, 

 these small leaves are thick, concave on the inside, sharply 

 pointed, not enlarged, but semi-embracing at the base, and 

 without trace of a nerve. 



