EXPLANATION OF THE ILLUSTRATIONS 
Piate I. Lepipocarpon GLtasrumM Darrah sp. nov. 
A single seed, embedded in a coal ball,showing the 
lustrous smooth wall of the sporangium. Shuler 
Mine, Waukee, Dallas County, Iowa. Specimen 
44106, Five times natural size. 
Piate I]. Leprpocarpon GLasrumM Darrah sp. nov. 
Figure at top. A lateral section through a seed 
showing the sporangial wall, the dense ‘‘nutritive’’ 
tissue, the seed megaspore, and the central cavity. 
Shuler Mine, Waukee, Dallas County, lowa. Spec- 
imen 44103. 
Figure at bottom. A sagittal longitudinal section 
through an immature seed showing the hard spo- 
rangial wall and the gametophyte. The tissues 
surrounding the central cavity not fully differen- 
tiated, although the nature of the “‘nutritive”’ 
layer is suggested. Shuler Mine, Waukee, Dallas 
County, lowa. Specimen 44107. Both photograph- 
ed from cellulose nitrate peels, magnified five times 
natural size. 
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