BY R. .1. TILLYARD. 



735 



distinct indications of the pterostigmatic furrow below Rj, The 

 origin of Rs, which is just missing in P. australica, is beauti- 

 fully shown in this specimen, as is also the origin of M from 

 Cuj at a level considerably basad from that of the origin of Rs, 

 and the approach of R to the combined stalk M h-Cuj close to 

 the base. There are also signs that this fusion of M with Cuj is 

 not complete basally, Cuj appearing distinctly bent basad from 

 the combined stem, while a tiny portion of M is preserved 

 running basad towards R. All four branches of Rs are shown, 

 the bifurcations of R2+3 being placed at a level far distad from 

 that of R4+5. Correlated with the evident greater breadth of 

 the wing, in comparison with that of P. australica, is the wider 

 form of the bifurcations of M, of which there are five distinct 

 branches shown, as far as the wing is preserved distally. A 

 greater length of Mg is preserved unbranched, than that of the 

 basal stalk of this vein before it branches in P. australica', yet 

 it would be unwise to assert that this vein remains unbranched, 

 since the winf; is evidently somewhat larger. 



Text-fig.o. 



PermochorlMa mifche/fi, n.g. et sp., wing (length 7 '5 mm.). Belmont; 



Permian. 



Of the cross-veins shown in the figure, some are approximately 

 in the same positions as those of P. australica, others not. 

 Probably the position of the cross-veins was as variable as it is 



