fiY il. J. TiLLYARl). 585 



DuNSTANioPSis TRiAssiCA, n.sp. (Text-fig. 1 8). 



Greatest length of fragment, 31 "5 mm.; breadth across the 

 dividing line, loo mm Esiiniated total length of hemelytron, 

 40 mm. 



'J'he specimen is only moderately preserved, and would appear 

 to have been much torn distally before it became fossilised, since 

 a part of a frond of Thinnfeldia, lying upon the same rock- 

 surface, projects well into the gap where the missing distal por- 

 tion ought to Ije, and is embraced on one side by the projecting 

 torn costa, without appearing to overlie the wing in any way. 

 Also the beautiful pattern of brown pigmentation bordering the 

 veins of the membrane, though it can be seen to be present, is 

 not by any means so well preserved as in Dutistmda. The 

 corium appears to have been hard, and is fairly well preserved; 

 the veins lying upon it are not so distinct as those upon the 

 membrane. 



The venational characters being considered as of either family 

 or generic importance, they will be found in full in the de- 



T V p e. Specimen No. 107rt, in the Queensland Geological 

 Survey Collection. 



Genus P A R A D u N s T A X I A, n.g. (Text-fig. 20). 



Portion of membrane only preserved, and in very poor condi- 

 tion. Apparently a hemelytron of somewhat larger size than 

 that of Duustaiiia. No cross-veins basally between Mj and 

 lowest branch of R. Cross-veins developed not far from dividing 

 line between Rj and Ro, atjd also between R;; and K4 .-5. This 

 last vein receives a curved branch-vein from above, at about 

 the same point as where, in Diiiistania, R^ and P., unite distally; 

 but a break in the rock-surface prevents us from determining 

 whether this branch is really R4 or not. At about the same 

 level, Mj receives a curving branch from above; this branch ap- 

 pears to come from R44.5, but its origin is not determinable with 

 certainty. Rest of venation similar to that of Dunstania. 



Genotype, Faradunsiania afjittis, n.sp. 



