BY R. M. JOHNSTON, F.LS. ta 
texture, and the lower portion of the pinna or frond is in- 
variably incised or lobed. 
The beds exposed along the shore at the Red Bluff, near 
Kennedy’s Hotel, afford the best evidence of the nature and 
sequence of the various members of the coal measures, con- 
taining P. Lunensis (mihi) and Vertebraria Australis. The 
north-eastern horn of the Southport Bay is composed of 
greenstone, against which the Permo-Carboniferous mudstones 
form a broken fringe along the shore towards the police 
station westward. The “Stack of Bricks”’ islet, at the Heads, 
is also a fragment or survival of the mudstone series, which 
at one time probably occupied the whole of the eastern part 
of the present bay. The whole of these mudstones dip very 
slightly south and west. The junction with the succeeding 
coal measures below Kennedy’s Hotel is concealed by a low 
lying tract of sand. Below Kennedy’s Hotel the lower beds 
of the coal measures first make their appearance in low-lying 
fiat reefs or terraces, all of which have a uniform dip of from 
10 to 15 degress to the south-west in the direction of Ida 
Bay, and disappear in a distance of about 300 yards, at the 
same angle under the reddish sandstone of the Red Bluff. 
The lower division is composed of a series of thin laminated 
beds of sandstone, alternating with simiar thin laminated 
blackish arenaceous shales. The thickness of those in view 
probably does not in all exceed 50 feet. Although some of 
the shales are highly carbonaceous, there 1s no appearance of 
coal seams. ‘The blackish shales, however, are rich in plant 
impressions, mainly the remains of Vertebraria Australis 
(M‘Coy). P. Lunensis, its associate, only occurs sparingly 
at this place. The irregularly bedded reddish sandstones 
succeeding the shales rise into a bold bluff towards the east, 
upon which is built the Roman Catholic Charch. 
The lower part of these sandstones, however, are laminated 
and flaggy. On the shore some parts of the exposed surface 
exhibit fine examples of ripple marking. _ The wavy ripples 
generally agree in direction, being generally at right angles 
to line of dip. The total thickness of the formation at South- 
port probably does not exceed 300 feet. 
fda Bay.—The members of this division again appear a 
few miles further east in the vicinity of Ida Bay. My infor- 
amation from this particular locality has in part been supplied 
-by Mr. Schachner, who is engaged in working one of the 
coal seams (about 4 feet thick) developed in the formation at 
‘this place. I have not yet obtained full particulars of the 
sections opened out, but hope to do so shortly. 
The shales associated with the coal here are almost wholly 
composed of the remains of P. Lunensis, although at South- 
port it only occurs rarely. Itis also of interest to find that 
