APHTHOROBLATTINA JOHNSONI. 99 



tegmen agrees fairly well with its fellow. Both veins curve inwards, and reach 

 the junction of the inner margin with the apex, and both give off 6 7 branches 

 inwardly, the first branch in each case forking. 



Which forward branches were given off on the outward side of the cubitus in 

 the left tegmen cannot be made out, but faint furrows on the right tegmen seem 

 to indicate that three simple outer veins were present. 



The anal area is long and acutely ovate, extending over nearly a third of the 

 inner margin. Six anal veins are present, the distal one with a strong fork. 



The interstitial neuration consists of stout, straight nervures, not always well 

 shown. The inner margin is nearly straight. 



The veins of the hind-wings are very fragmentary. They are much thinner 

 than those of the tegmina, and have left a much slighter impress. They appear 

 to consist of a straight costa, separated by a very narrow area from an equally 

 straight subcosta, below which can be made out a portion of the radius, radial 

 sector, and median. 



All the veins are widely spaced, and the breadth of the hind-wings must have 

 been abont double that of the tegmina. 



The dissimilarity between the neuration of the left and right tegmina in the 

 type-specimen suggests a wide varietal range among Coal Measure Blattoids, a 

 feature which needs to be taken into account in the definition of species. 



The presence of these abnormalities in the type-specimen somewhat militates 

 against its value for reference, and I therefore add other details from a second 

 example which I received from Mr. W. Egginton. The specific characters given 

 above have been drawn up from this specimen, which lies in a small ironstone 

 nodule, marked " No. 2," having a length of 43 mm. and a breadth of 38 mm. 

 The Blattoid has a total length of 33'5 mm., and a maximum breadth across the 

 tegmina of 24 mm. The inner margins of the tegmina overlap, evidently in their 

 position of rest during life. 



The pronotum, apparently in natural position, lies a little out of the horizontal, 

 the front margin dipping downwards, and the hinder margin upwards and a little 

 forwards, so that a slight gap occurs between it and the wings. This feature we 

 have already alluded to, and in this case the pronotum has been carried away as 

 usual, but the wings remain, so that the wing-impressions with the pronotum are 

 on the upper surface of one half of the nodule, the other half carrying the 

 pronotal impression and the wings. 



The pronotum is 12 mm. wide and broadly rounded, only a little more than 

 half being visible. It shows a central raised area, oval in outline, and defined 

 from the margins by lateral grooves. The meso- and meta-notal segments show as 

 a low, flat, elongated, heart-shaped region overlain by the anal areas of the tegmina. 



Both tegmina are still attached high up on the sides of the body. So far as 

 can be determined through the substance of the tegmina, the hind- wings are 



