392 PROCEEDINGS OF SECTION C. 
three species mentioned above under the genus or sub-genus 
Angiopteridium, Schimper, which includes pinnate narrow-leaved 
Mesozoic Tzeniopterids. 
Mr. Etheridge, from an examination of a large number of speci- 
mens, gives the following specific characters :—-“ Frond very long, 
narrow, strap-shaped, elongately lingual, petiolate, straight, slightly 
curved, or rather flexuous, parallel-sided, or the margins undulating 
or gently sinuous in places, with an average width of five-sixteenths 
of an inch. Apex rounded, acute, or emarginate. Petiole strong, 
striated, and naked. Midrib or costa, thick, striated longitudinally, 
retaining its size throughout the length of the frond ; veins distant 
or close, simple or bifurcate, generally at right angles to the 
midrib, but at times slightly oblique, without curve, dichotomisa- 
tion taking place near the midrib, or at a variable distance between 
it and the margin.” (Geol. Pal. Q’land, 1892, p. 371.) He also 
discusses very fully the relationships of the species. 
There can, I, think, be no doubt that the Zentopteris Daintreet 
of McCoy is most closely related to the Indian Angiopteridium 
(Teniopteris) spathulatum, McClelland, as has already been 
remarked by Messrs. Feistmantel,* R. Etheridge, Junr.,+ and 
Shirley.t Feistmantel on this subject says: ‘‘Of foreigns forms 
the Australian JTentopteris Daintreet, McCoy, can to a certain 
extent be compared with this Indian form ; but the veins in the 
former seem to be still straighter and are thicker than in our 
species.” Commenting on this, Mr. Etheridge remarks: ‘‘ The 
latter part of this sentence exactly expresses the difference which 
exists between the Queensland fossils and McCoy’s species as 
well as between the latter and the Indian plant. It will not, 
however, surprise me if these species have to be united ; if 
not, most of the Queensland fronds will have to be referred to 
A. spathulatum, McClelland,” Mr. Shirley agrees with these remarks 
as far as concerns the Queensland leaves, deeming them to be the 
A, spathulatum and distinct from 7’. Daintreei as figured by McCoy. 
It must, I think, be admitted by all that the Australian species 
Daintreet belongs to Angiopteridium, that numerous leaves vary- 
ing but little from the type specimens from Victoria are not 
separable from the Indian spathulatwm, and, finally, that there 
is in reality but the slightest evidence in favour of retaining 
Daintreei as a separate species. The variation of thickness of 
midrib and the slightly straighter direction of the veins are not 
sufficiently convincing to merit specific distinction, and could 
easily be due to difference of local conditions. Variations as 
great or greater than these can be seen in any series of Austra- 
lian specimens, and after an examination of a large number of 
* Pal. Indica (Gondwana Flora), 1879, i, pt. 4, p. 207. 
+ Geol. and Pal. Q’land, 1892, p. 378. 
¢ Add. Foss. Flor. Q’land, 1897, p. 27. 
