680 MKSOZOIC INSKCTS OF QUEENSLAND, il., 



catches the light directed from the base (Plate xlii., fig. 9) but 

 lies in deep shade when the light is directed from the distal side. 



It should also be noticed that the numerous convex branches 

 of A are separated by concave supplements. None of these are 

 true branches of A, for it can easily be seen that they are all 

 incompletely formed as they approach A from below. Wood- 

 ward's figure shows this fairly well, but an examination of the 

 actual fossil (Plate xlii., fig. 10) shows, along the broken-off edge 

 below and proximad from the triangle, how very marked this 

 alternate convexity and concavity really is. 



The Gosta (C) is much thickened at the base, for a distance of 

 about 2 mm.; there are only very faint indications of the typical 

 "ribbing" of this vein. For most of its length, it appears to be 

 a rather weak vein, very little stronger than Sc. Between C 

 and 8c, a parallel supplement (Cspl) is developed, beginning 

 weakly just above the arculus, and continuing more strongly 

 right to the nodus. This is not shown at all in Woodward's 

 figure. The cross- veins between C and R are mostly weak and 

 irregularly placed; but two complete ones can be made out, which 

 are shown slightly thickened in Plate xliii., fig. 11. These pro- 

 bably represent the two hypertrophied antenodals of recent 

 uEschnidce. Beyond the nodus, there is only a much fainter 

 indication of a corresponding supplement, though Woodward 

 figures this as if it were quite obvious. 



The subcosta (8c) is very plainly marked, lying in a moderate 

 furrow from base to nodus. At that point, it appears to divide 

 into three, one branch turning sharply upwards to join the costa, 

 a second running straight on through the nodus, parallel to and 

 between C and R, and a third turning obliquely downwards to 

 meet R at the subnodus. The actual structure of these three 

 veins will be fully discussed when we come to deal vs-ith the 

 nodus itself. 



The radius (R) and media (M) appear to be very slightly 

 separated at the extreme base of the wing, but fuse together 

 almost immediately, and continue to the arculus as a single, 

 thick, convex vein, R + M. Thence onward, R runs ahuost 



