BY K. J. TILLYAKD. 425 



suggest a likely relationship with Fpfrofheinis ^iv<inlnris Haud- 

 lirsch, which is itself unplaced, owing to absence of the basal half 

 of the wing. A figure of this latter fossil is given in Handlirsch's 

 Atlas (1), Plate xlii., fig. 9. Jt is a much smaller wing than that 

 of Fei'itisoph/ehia, and comes from the Upper Lias of Dobl)ertin, 

 Mecklenberg. 



Order PROTODONATA. 

 Suborder Aeroplanoptera, subordo nova. 



Insects with strongly veined wings, traversed by numerous 

 parallel longitudinal veins, with a network of irregular cross- 

 veins, well developed near the base only; in the rest of the wing, 

 the cross-veins tend to become weak, and almost disappear dis- 

 tally. Costal border strongly developed, coriaceous at base. 

 Radius with a single sector. Media with many dichotomous 

 branches. Cubitus two-branched. 



This Suborder is at once distinguished from all the rest of the 

 Protodonata (which may be termed the Suborder Meganeuro- 

 ptera, from the dominant family) by the close, parallel veining 

 of the wings, the dichotomous branchings of the media, and the 

 two-branched cubitus. In this latter character, it agrees with 

 the Order Odonata; whereas the rest of the Protodonata have 

 only a simple cubitus. 



Family AEROPLANID^, fam.nov. 



Wings excessively elongated and narrow, the parallel longitu- 

 dinal veins strongly developed and close together. Subcosta 

 weak, in a deep groove just in front of the exceedingly strongly 

 developed radius. The single radial sector arising from near the 

 base by a double root. Media seven-branched in both wings, but 

 the method of branching is different in fore- and hindwings. 

 Radius and media just fused at bases. Cubitus with its two 

 branches arising close to the base and diverging gradually. A 

 single anal vein present, below which is developed an anal field 

 with irregular veining, supported by a curved recuri-ent sup- 

 plement. 



