72 ROYAL SOCIETY OF CANADA 
This list of plants is much too limited to be employed as a definite 
basis for conclusions relative to the age of the deposit, but an analysis 
of the foregoing table shows that in point of distribution, the plants 
are considerably more abundant in the Eocene (56-66 per cent) than in 
the Miocene (40-00 per cent). On the other hand, there are no 
species which are exclusively Cretaceous, but there are 2 per cent 
which are exclusively Eocene and 3 per cent exclusively Miocene. 
Seven species in all occur in the Eocene, while eight species occur in 
the Miocene. Out of a total of ten species, 10 per cent occur also 
in the Cretaceous and 40 per cent occur also in the Eocene. So far 
then, as this evidence goes, it seems to indicate the Miocene age of 
the formation on the Horsefly River. 
EXPLANATION OF THE FIGURES. 
Plates VII.-XVI. 
Fig. 1.—Osmunda skidegatensis. Transverse section of the stipe. x 29. 
Fig. 2.— ...... .. .. .. «. + ..Transverse section of the outer cortex. x 180. 
Wig. 3.—.. .. .. .. .. «. .. .. «. Dransverse section of the inner coxtex. x 180. 
Fig. 4.—Todea barbara. Transverse section of the stipe. x 29. 
Fig. 5 —Osmunda skidegatensis. Transverse section of stipe, showing details 
of the stele. x 42. 
Fig. 6.—.... .. .. .. .. Transverse section of the stele, showing details 
of the gore region, and obliteration of the parenchyma in the 
phloem and xylem regions. x 180. 
Fig. 7.—Todea barbara. Transverse section of the stipe, showing details of 
the stele for comparison with fig. 6. x 56. 
Fig. 8—Osmunda skidegatensis. Longitudinal section of the stipe, showing 
cortical parenchyma, two regions of phloem parenchyma with 
abundant mucilage globules, and a central region embracing the 
xylem. x 29. - 
Fig. De we se ses ee cs uelee longitudinal section of itheystipe, showine 
the structure of the inner cortex, the region of the phloem paren- 
chyma with abundant mucilage globules, the phloem region and 
scalariform vessels of the xylem. x 55. 
Pig. 10.—... peace . .... .. .. LOngitudinal section through the xylem, show- 
ing the Uptaierive of the scalariform vessels. x 180. 
Fig. 11.—Ginkgo pusilla. Transverse section of the wood. x 61. 
Fig. 12.—.. .. .. .. .. .. Radial section of the wood. x 180 
Fig. 13.—.. .. .. .. .. .. Tangential section of the wood. x 180. 
Fig. 14.—Sequoia langsdorfii. ‘Transverse section of the wood. x 55. 
Big: 15.—..... Sas ae! pet ie eee adial ssection of the woods sop: 
Fig. 16.—.. -. .. .. .. .. .. .. Tangential section of the wood. x 55, 
Fig. 17.—Pseudotsuga miocena. Transverse section of the stem. x 55. 
Big, 1822, 5 NN RAA Section Of /StemimsagliU: 
Fig. 19.—.. .. .. 4 ss is we cd.  Danigential section of, stem, showing uni- 
seriate rays. x 170. 
Fig. 20.—.. .. .. .. .. .. .. .. .. Tangential section, showing character of the 
fusiform rays. x 170. 
