760 SYSTEMATIC PALEOXTOLOGY 



narrowed acute recurved apex, with an entire margin, each bract sub- 

 tending a large spheroidal sporangium which may possibly be reniform, 

 though in the impressions preserved in the clays it appears to be globular. 



This unique species is represented by rather scanty material in the 

 Maryland area which, however, shows the outlines of sporangia in the axis 

 of the bracts. It was described from very abundant remains preserved in 

 the clays of the Middendorf member of the Black Creek formation in 

 South Carolina. It is also sparingly represented in the lower Tuscaloosa 

 beds of western Alabama and is thus shown to have had a considerable 

 geographic range. Preparations have failed to reveal any traces of spores 

 in the sporangia. 



Fossil remains of foliage resembling that of the modern club mosses 

 have been frequently described, either as Lycopodium or Lycopodites 

 Brongniart, but the majority of such determinations lack certainty in 

 that they show neither anatomical nor fruiting characters, so that the 

 present species is of great interest as the only post-Paleozoic fossil known 

 to the writer which is referable with absolute certainty to the genus 

 Lycopodium. No remains of foliage have been discovered in these clays 

 which can be correlated with these fruiting spikes. 



Occurrence. MAGOTHY FOEMATIOX. Little Round Bay, Anne 

 Arundel County. 



Collection. Maryland Geological Survey. 



Order FIL1CALES 

 Family GLEICHENIACEAE 



Genus GLEICHENIA Smith 

 [Mem. Ac. Turin, vol. v, 1791, p. 418] 



GLEICHENIA ZIPPEI (Corda) Heer 



Pecopteris zippei Corda, 1846, in Reuss, Versteinerungen, p. 95, pi. xlix, 



fig. 1. 

 Pecopteria zippei Unger, 1867, Kreidepflanzen aus Oestereich, p. 8, pi. ii, 



fig. 1. 

 Oleichenia zippei Heer, 1868, Fl. Foss. Arct., Bd. i, p. 79, pi. xliii, fig. 4. 



