264 FOSSIL INSECT-WING FROM SYDNEY HARBOUR COLLIERY. 



a slender but well-preserved vein, parallel to R, and having four 

 descending branches placed somewhat wide apart. The cross- 

 veins between these branches mostly not visible, but indications 

 of them here and there in a good light. A portion of a fairly 

 strong vein is preserved near the posterior border, but this vein 

 cannot be named with certainty. It appears to be connected 

 with the border by means of a series of oblique cross-veins. 



Type, in Coll. Geological Survey of New South Wales, 

 Sydney. 



Postsa'i}>t (added June 14th, 1918).^In my paper on the 

 " Permian and Triassic Insects from New South Wales, in the 

 Collection of Mr. John Mitchell," These Proceedings, 1917, xlii., 

 Pt. iv., p. 7 25, I named Schizoneiira as one of the genera of the 

 fossil flora of the Upper Coal-Measures of the Newcastle District 

 The name was taken from the list given in Siissmilch's "Geology 

 of New South Wales," on p. 135, where also the genus Tceni- 

 opteris is included. As several geologists have taken exception 

 to the inclusion of this genus in the Permian Flora, I take this 

 opportunity of pointing out that I did not state that the genus 

 Schizoneura occurred at the horizon of either the Belmont or 

 Newcastle Insect-Beds. I have to thank Mr. W. S. Dun for 

 explaining the exact state of the case to me. It appears that 

 Schizoneura is found only at the very top of the Permian Beds, 

 in beds that might w^ell be considered as the passage-beds between 

 the Permian and Triassic, but which should be classed as Per- 

 mian as long as we define the presence of Glossopteris as the 

 criterion by which to separate the Pala3ozoic from the Mesozoic 

 in Australia. The same is true of 7'ce7iiopteris, which is asso- 

 ciated with the insect-wing described in this paper; it should be 

 noted especially that the species, though unnamed, is certainly 

 not T. Baintreei McCoy, ( = T. spatulata McClelland), which is 

 characteristic of the Jurassic. The horizon of the wing described 

 in this paper is, therefore, some 600 feet vertically above that 

 of the Belmont Insects previously described, and more than 800 

 feet above that of the Newcastle Insects. Whether, therefore, 

 Elcanopsis be considered to be a Permian genus or not, there 

 can be no question that these other insects are such.— R.J.T. 



