112 S. H. SCUDDER ON PALAEOZOIC COCKROACHES. 



trace of transverse markings can be seen. This peculiar structure is -well brought out in 

 fig. 16 a , of Fontaine and White's plate, but the figure of the wing, fig. 1G, represents the 

 course of the neuration as entirely wrong. 



The species is, of course, based upon the wing described above, but another fragment of a 

 wing (PI. 6, fig. 10) has been found by Professor Fontaine ; and, notwithstanding it occurs 

 in a considerably lower deposit, and represents a part absent from the other wing (thus sup- 

 plementing it, but at the same time affording no common ground for structural comparison 

 beyond the size), we must consider it as belonging to the same species, on account: first, of 

 its size, which agrees perfectly with the other fragment ; and second, from the fact that each 

 of the veins is accompanied by a black belt, although without the addition of the transverse 

 veins. The fragment is that of an entire anal area, and shows that the anal furrow of this 

 species was very deeply impressed in its basal half, more gently in its apical, was rather 

 strongly arcuate and a little bent in the middle, but probably terminated a little beyond 

 the middle of the basal half of the wing, being unusually short; the anal veins were 

 simple, the first three rather distant (but the first very close to the anal furrow), scarcely 

 raised above the surface, and bent in the same sense as the anal furrow, being subparallel 

 to it; the other three or four are gently arcuate in an opposite sense, delieatety elevated, 

 and closely crowded. The length of the fragment is 7.5 mm.; its breadth, 3.5 mm. The 

 black belts accompanying the veins are a little narrower than in the other fragment. The 

 surface exposed is also that of a left upper wing. 



This species is sufficiently distinguished by the banded neuration of the wings to separ- 

 ate it from any other. The distribution of the veins, however, shows that it falls into 

 this genus and has certain special affinities with Gerabl. Maliri and G. weissiana ; from 

 the former of these it differs very much in the greater brevity of the mediastinal area ; and 

 from the latter it is distinguished (there are few points of comparison, from the fragment- 

 ary nature of G. weissiana) by the much earlier origin of the first scapular branch. It 

 has closer affinities, in most of the broad features of its neuration, with the other American 

 species of the genus, G. fasciata, but to the fine subdivision of the veins of the latter it 

 has nothing to correspond ; neither has it in the length and multiple division of its scapular 

 vein, nor in'the basal union of the principal veins, nor in the structure of the anal area. 



The first and principal fragment described above was found by Messrs. Fontaine and 

 White at Cassville, Monongolia County, W. Va., in the roof shales of the Waynesburg 

 coal, or the very highest of the beds of the upper productive coal series, in the nomen- 

 clature of the first Pennsylvania survey, or the beds termed Permo-carboniferous by Pro- 

 fessor Fontaine. The other fragment comes from Bellaire, Ohio, near Wheeling, W. Va., 

 associated with plants of the upper productive coal beds, in shales twenty feet below the 

 Pittsburgh bed of coal, which lies at the base of the upper productive coal series, and 

 clearly within the carboniferous series proper. Professor Fontaine, who kindly sent me the 

 specimens, writes me that the two localities are eighty miles apart, and separated by three 

 hundred feet of strata. Upper carboniferous ; Permo-carboniferous. 



