i 
| 
y 
4 Canadian Record of Science. 
one answers to what Salter has described, from the same 
formation, as roots,’ but which are probably referable to 
Psilophyton. To this same category—roots—K idston refers 
a plant figured by Salter® some years ago, but which would 
appear from the figure given to belong more properly to 
Parka decipiens var. minor. 
A revision of the descriptions of Parka to embrace the 
new facts at hand would be as follows :— 
Genus Parka. Flem. 
Aquatic plants with creeping, rugose stems, linear leaves 
and sessile sporocarps bearing two kinds of sporangia. 
Sporangia, 2 mm. in diameter; macrospores, 40 «4; micro- 
spores, 15 yu. 
These fossils occur in micaceous slaty or sandy shales. 
Their most characteristic appearance is that of oval bodies or 
fragmentary masses showing rounded discs or impressions 
of such. They are sometimes carbonized, often ferruginous. 
From the Lower Devonian of Myreton, Rescobie, Blair- 
gowrie, Thurso and Caithness, Scotland. Reid and Graham. 
PARKA DECIPIENS, Flem. Stems about 4—5 c.m. in dia- 
meter, showing branching about 11 c.m. distant. Leaves, 
linear, 1 c.m. broad, with somewhat rounded terminations. 
Sporocarps, oval, 3.55.5 ¢.m., being more or less con- 
spicuous impressions of the contained sporangia. 
The sporocarps are sometimes complete, though gener- 
ally found in fragments, either carbonized or ferruginous. 
a. MEDIA, Pen. Stems, 15-20 mm. wide, and with the 
oval sporocarps nearly entire, 13 x 20 mm. broad, and often 
showing a distinctly radial reticulation. Impressions of 
the sporangia distinct, usually carbonaceous. Leaves un- 
known. 
fi. MINOR, Pen. Stems, 4 mm. broad, with branches 2.5-3 
c.m. distant. Leaves linear, 1.5-2 mm. broad, sometimes 
finely veined, Sporocarps oval, 6-11 mm. broad. Impres- 
sions of the sporangia distinct, usually carbonized. 
1Jn’l. Geol. Soc., Plate V, figs. 3, 4. 
3 Ibid, Plate V, fig. 6. 
British Mus, Cat. Pal. Plants, 233, 
