Fossil Plants from Gingin, W.A. 
203 
Type speciniPMs iu collection of Geology Department, University of West- 
ei*n Australia : Nos. 16687 (leaves) and 16683 (sporangia). Counterparts of 
portions of the types are in the collection of the Australian Museum (Nos. 
F 39818, F 39816). 
FILICALES. 
Cladophlebis australis (Morris). 
There are one or two specimens referable to Cladophlebis australis. They 
are not well preserved and apparently the species is not at all abundant. 
Thinnfeidia talbragarensis Walkom. 
(Plate II., fig. 8.) 
Several specimens agree well with Thinnfeidia talbragarensis from Jurassic 
rocks at Talbragar, N.S.W. (Walkom, 1921, p. 9). 
The frond is bipinnate and of the type common in Australian Thinn- 
feldias but there is no indication that the rachis divides dichotomously as it 
does in most Australian spe(*ies of Thinnfeidia. 
Sphenopterid fragments. 
Several sphenopterid fragments, which show no detail, may belong to a 
species such as Coniopteris hyynenophylloides which is common in Jurassic 
floras, and is known in association with Taeniojderis spahdata in the Aus- 
tralian Jurassic. 
Taeniopteris spatulata McClelland. 
(Plate II., fig. 9.) 
There is a considerable variety of leaves in the collection referable to 
Taeniopteris, examination of which only emphasizes the difficulty of accurate 
specific definition of numerous sterile Taeniopteris fronds (see Seward, 1904, 
p. 169). 
These leaves are elongate lanceolate, somewhat strap-shaped, more than 
7 cm. long, usually up to 1*6 cm. wide, occasionally somewhat wider (2*4 
cm.), with a prominent finely-striated midrib which has a width of 1*5 to 
2 mm. The secondary veins are at right angles, or almost so, to the midrib ; 
many of them are simple, but many divide, usually only once, at varying 
distances from the midrib ; on the average tliere are about 16 veins per cm. 
of lamina, but the number \ aries considerably, and in some of the narrower 
leaves there may be as many as 25 or 30 veins per cm. 
It is not easy to separate these fronds from T. S 2 )atulata McClelland, 
and T. spahdata- var. major (Seward). The larger specimens certainly ap- 
proach T, Garruthersi Tonison-Woods, a species which has never been very 
satisfactorily described, since only incomplete specimens have been available. 
The midrib in the Western Australian specimens appears to be much more 
prominent than that of T. Garruthersi. 
T. spatulata occurs abundantly in the Jurassic rocks of Eastern Aus- 
tralia, and occasionally in the Cretaceous. T. Carriithersi, on the other hand, 
appears to be a somewliat older form, occurring in the Triassic (Ipswich Series) 
of Eastern Australia, and in the 8tormberg Beds of South Africa. 
