EXPLANATION OF THE ILLUSTRATION 
Copvonotueca capuca Sellards 
Upper figure: A cluster of synangia showing their 
paired arrangement. Carboniferous: Allegheny 
Formation. Mazon Creek, Illinois. Four fifths nat- 
ural size. Harvard Botanical Museum (Paleobota- 
ny) No, 24991 (F.O. Thompson Collection). 
Figure at lower left: Photograph of a nitrocellu- 
lose peel from one synangium. Note the orienta- 
tion of the many small dark ““granules.’? These 
granules are pollen-grains. Twice natural size. 
Mazon Creek, Illinois. Peeled from specimen No. 
5033 Harvard Botanical Museum (Paleobotany) 
(Lesquereux Collection). 
Figure at lower right: A single synangium natural 
size. Mazon Creek, Illinois. Harvard Botanical 
Museum (Paleobotany) No. 5026 (Lesquereux Col- 
lection). 
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