5 
FOSSIL PLANTS FROM COCKABUTTA MOUNTAIN. 
The specimens from the ferruginous shale at Cockabutta Mountain are 
few in number and are not sufficiently well preserved to warrant detailed 
description. They include examples which may without doubt be referred 
to Cladophlebis australis (Morris), Thinnfeldia sp. , S phenopteris sp. , and 
Tceniopteris sp. , and also specimens of what may be a Tseniopteroid leaf. 
The few pinnules referred to Thinnf eldia (F3129) are short and rounded, 
and have the veins springing from the base ; they therefore may belong either 
to T. Feistmanteli or to T. odontopteroides. Two specimens (F3130u, F.3134) 
show a Tceniopteris, whose leaf is about I -4 cm. wide, with the midrib finely 
vertically striated and less than 1 mm. wide. The secondary veins come off 
at an acute angle, and soon bend so that they are at right angles to the midrib ; 
at the margin of the leaf there are about 8 veins in a distance of 5 mm. The 
secondary venation suggests a comparison with T. Carruthersi , Tenison-Woods. 
An example of this is figured in Plate 111, fig 3. 
Other specimens (F3131, 3133) show a strap-shaped leaf about 1 cm. 
wide, with a prominent midrib, which shows 2 or 3 vertical striations, and is 
about 1 mm. wide. The lamina shows a series of folds at right angles to the 
midrib, producing a corrugated appearance of the portions of the lamina on 
each side of the midrib, about four corrugations showing in a space of 1 cm. 
The specimens exhibit no further detail of structure, and it is impossible at 
present to say whether or not the corrugations may be due to the presence of 
sori on the underside of the leaf. It may be remarked that similar specimens 
have been observed among a series of plants from the Wianamatta Series 
collected by Mr. John Mitchell. This collection of Mr. Mitchell’s is shortly to 
be described. The only conclusion that can be safely drawn at present is 
that these represent leaves which possibly belong to Tceniopteris. 
A single specimen (F3130) may be referred to Sphenopteris, but there 
is not sufficient of it for specific determination. It has rather wedge-shaped 
pinnules, somewhat similar to those of Sphenopteris ampla from the Jurassic 
rocks in Victoria. 
