PLATE 22. 



Fig. 1. 100. 4. Paljeophycus simplex. (Pag- 63.) 



1 «. A portion of a large stem, and section. 



1 6. A fragment compressed and bent. 1 c. Section of the same. 



1 d. A small fragment, showing the groove along the side of the stem. 



Fig. 2. 98. 3. BnxHOTREPHis sttcculens. (P^g- 62.) 



2 o. A portion of a large specimen, the branches scarcely compressed. 

 2 b. A single stem with branches, from another plant. 



