be the same in the two, here the number of segments is fewer, 
and they are very much larger and wider. But the more striking 
difference is in the venation and sori. Here, where the areoles 
are seen to have a double row of several sori, the corresponding 
areoles in coronans have only one sorus in each. 
Fig. 1. Portion of a tuft of fronds on an exceedingly reduced scale. 2. Small 
fertile segment,—wnat. size. 3. Portion of a segment, showing the venation and 
sorl,— magnified. 
