Reviews — Dawsoji's Acadian Geology, 



Fio. 4. 



837 



B2. Portion of decorticated stem, 

 B3. Portion of stem and branch 



Sigillaria Brownii, Dawson, restored. 



S. elegans, Brongn. restored. Bi. Leaf of S. elegnns. 



showing one of the transverse bands of fruit-scars. 



reduced, and scars nat. size. 

 Cross section of SigiUaria Brownii (?), reduced, and portion at (M) nat. size.— (a). Stern- 



bergia pith.— (M). Inner cylinder of scalariform vessels.— (i^). Outer cylinder of dis- 



cigerous vessels, with medullary rays and bundles of scalariform vessels going to the 



leaves at (/-3)._ (c). Inner bark.— (rf). Outer bark. 

 Scalariform vessel, magnified. E. Discigerous woody fibre, magnified. 



S. Bretoncnsis, Dawson. (Fl). Areole, half nat. size. 

 S. striata, Dawson, nat. size. 



S. eminens, Dawson, reduced. (Hi). Areole, half nat. size. 



S. catenoides, Dawson, half nat. size. K. S. planicosta, Dawson, half. nat. size. 



Portion of leaf of S. scutellata, Brongn. 



