19 
Later, however, I received from Mr. John Mackenzie a more 
detailed section across the same ground in the length of 20,900 feet. The 
section is on a scale of 1" = 200', so that it is not practicable to reproduce it 
here ; hut, as the numbers of the fossiliferous beds of the section also referred 
to a collection of identically numbered specimens taken from the various 
beds, I shall describe the section in a more summary order just to show the 
position of the various beds from which the fossils were taken. On the 
whole there are twenty-six fossiliferous beds marked, beginning with No. 1 
to the west, and ending with No. 26 to the east. 
The section is about the following 
West : — (a) The first 2,000 feet consist of porpliyritic rocks, conglomer- 
ates, breccias, and sandstones. 
(b) Prom 2,000-3,000 feet we find sandstones, with imbedded 
sliales, the latter containing fossil plants. Prom here 
are taken fossils No. 1 and No. 2, and this at 2,800 feet 
and 3,000 feet respectively ( Uhacopteris ). 
(c) Prom 3,000-4,000 feet there arc, again sandstones and 
shales, and No. 3 is taken at about 3,250 feet (Jthacop- 
teris). 
(d) Prom 4,000-6,000 feet there is an irruption of porphyry. 
(e) In the second half between 6,000-7,000 feet there are 
again, sandstones with shales, from which were taken 
No. 4 (at about 6,430 feet), No. 5 (at about 6,630 feet), 
No. 6 (at about 6,680 feet), and No. 7 (at about 6,730 
feet), containing Uhacopteris, Lepidodendron, Cata- 
mites, Knorria. 
(/) Prom 7,000-S,000 feet are sandstones, with shales, con- 
taining plant impressions. 
{</) Prom 8,000-9,000 feet porphyry, sandstone, and con- 
glomerate. 
( h ) Prom 9,000-10,000 feet there are again, sandstones with 
cherty shales, which contain plant impressions. Prom 
these are No. 8 and No. 9 (at about 9,075 feet), No. 10 
(at 9,300 feet), and No. 11 (at 9,770 feet) ( Uhacopteris ). 
( i ) Prom 10,000-11,000 feet, sandstones with shales. No. 12 
(at about 10,680 feet) is taken from there. 
