CRYPTOVENIA MOYSEYI. 35 



[4J, vol. xxxi, 101 J, p. 208), the relationship is even closer, as in that genus the 

 costa and subcosta are close together, the radial sector arises low down and is 

 divergent from the radius, the median is a simple vein ending in three branches, 

 while the cubitus is almost identical in its divisions, the difference being that the 

 first forking arises at a higher point than that in Athymodictya /mrni, Handl., and 

 that the inner simple ramus of the outer branch comes off a little below the middle 

 of the wing. The anal veins number four in A. parva as against five in the wing 

 under consideration. The wings arc almost equal in size. It is not possible, 

 however, to refer this wing to Athymodictya owing to the character of the interstitial 

 neuration. In Athymodictya this is reticulated, while in the British wing the 

 interstitial neuration is apparently made up of transverse nervures. If this point 

 can be clearly determined, the wing may have affinities with the Homoiopterida3 

 or with the Lithomantidae, but it cannot be referred to either of these families. 

 Neither Dr. Handlirsch nor I could satisfactorily refer the wing to any known 

 family, and I therefore founded the family Cryptoveniidas to receive it. 



Genus CRYPTOVENIA, Bolton. 



1912. Cryptovenia, Bolton, Quart. Journ. Geol. Soc, vol. lxviii, p. 315. 



Generic Characters. — Wings twice as long as wide. Median, cubitus and anal 

 veins curving sharply inwards. Interstitial neuration of straight cross-nervures. 



Cryptovenia moyseyi, Bolton. Plate II, tig. 1 ; Text-figure 4. 

 1912. Cryptovenia moyseyi, Bolton, lor. cit., p. 315, pi. xxxii, figs. -1—6. 



Type. — Incomplete wing, in counterpart ; Moysey Collection, Museum of 

 Practical Geology, Jermyn Street (nos. 30,226 and 30,227). 



Horizon and Locality. — Middle Coal Measures (below the top Hard Coal) ; 

 Shipley Manor Claypit, Ilkeston, Derbyshire. 



Specific Characters. — Costa feebly curved distally, subcosta reaching outer 

 margin near wing-apex. Radius close to and parallel with the subcosta; radial 

 sector arising from radius in basal half of the wing, the five branches occupying 

 the inner half of the wing-tip. Median with the first branch undivided, and the 

 second forking twice. Cubital vein strongly arcuate, two-branched, and ending in 

 five twigs. Anal veins five or more in number, and curving sharply inwards. 

 Wing plicated, and the interstitial neuration obscured by a mass of wrinkles. 



Description. — A small delicate wing, incomplete at the base, Avhich must have 

 been very narrow and with the main veins crowded together. The total length of 

 wing preserved is 16 mm., and its maximum diameter, in the cubito-anal region, 

 is 8 mm. 



