PLATE 10. 



Fig-. 1, 2. 408t 7. PaLjEophycus? striatus. ( Pag. 22.) 



1 a. A fragment of a stem having the striated surface well preserved, with a more elevated line along the 



centre of the portion exposed. 

 1 6. A fragment from near the base, with the rootlets preserved. 

 1 c. A similar fragment, giving indications that the stem was hollow. 



1 d. A fragment of a small specimen, showing the upper termination. 



2 is perhaps the expanded termination of one of these stems, which has been much flattened: it is represented 



of the natural size. 



Fig. 3. 409. 8. Pal^ophycus ? (Pag, 22.) 



Fig. 4, 5, 6 & 8. Roots of differeiit species of marine plants, ^-c. ( Pag. 25.) 



Fig. 7. 415. 1. ICHNOPHYCUS TRIDACTYLTTS. ( Pag. 26.) 



Fig. 9 (z, 5, & 10. Roots of Buthotrephis. ( Pag. 21.) 



