S. H. SCUDDER ON PALAEOZOIC COCKROACHES. 95 



have been based for size upon the smallest of these figures, and is therefore doubtless too 

 small; in length it should have closely resembled Anthr. Sucker ti. The fragment repre- 

 sents the upper surface of a left wing, in which the basal third, the whole anal field, and 

 part of the internomedian is destroyed. The veins are all deeply impressed, and the inter- 

 spaces are correspondingly vaulted, but the mediastinal vein, probably by the mode of 

 preservation, is sharply elevated into a ridge. Goldenberg describes the cross venation as 

 nearly effaced, but where traces of it are found, as consisting of a network of delicate 

 quadrangular meshes, visible only by considerable enlargement. 



This wing is very peculiar, not only for its pointed apex, but for its elevated mediastinal 

 vein, perhaps due, as remarked, to accident ; and also for the nearly equal breadth of its 

 long externomedian area, which is the more striking because unaccompanied by corre- 

 sponding differences in other parts. These peculiarities forbid any reference of this form to 

 any other species, and render unnecessar}^ any special comparison with allied types. It is 

 placed in its present position, however, because it resembles the preceding species in the dis- 

 tribution of the scapular and mediastinal branches, and the following in the narrowness of 

 the mediastinal area, more than it does the other species; but the resemblance is not very 

 great, nor does it extend to other important parts of the wing. Goldenberg compares it 

 to Blattina russoma, but only as regards the size. 



The single specimen was found in the Dudweiler coal-pit, near Saarbrlicken. Germany. 

 Middle carboniferous. 



Anthracoblattina Remigii. PI. 4, fig. ± 



Blattina Remigii Dohrn, Palaeont.. xvi, 133-34, taf. S, fig. 3 ; — Gold., Faun, saraep. foss., 



ii, 20, 26-27, 51, taf. 1, fig. 13. 



Fore wing. Nearly the whole of the inner margin is wanting, so that the form of the 

 wing cannot be definitely stated; it would appear, however, to have been nearly equal or 

 slightly tapering, for the principal veins are straight for most of their course, and the costal 

 border is very gently and regularly convex, with the appearance of a fully-rounded apex. 

 The veins originate from above the middle of the wing, and have only a very broad and 

 gentle upward curve near the base. The mediastinal vein runs subparallel to the costal 

 margin, very gradually approaching it, a little more rapidly as the apical third of the wing 

 is entered, terminating scircely before the apical sixth of the wing; the area is about one- 

 fifth the breadth of the wing, and is filled with a large number (eight to ten) of arcuate, simple 

 branches, longitudinally oblique even at the start, and becoming nearly longitudinal toward 

 the apex. The externomedian vein is much more distant from the mediastinal than from 

 the internomedian vein, has a very gently arcuate, longitudinal course, parallel to the costal 

 margin in the basal two-thirds of the wing, and terminates at the very tip of the wing ; it 

 divides, a little before the middle of the wing, into two branches, each of which fork near 

 the tip of the wing only. The externomedian vein runs in close proximity to the pre- 

 ceding, is straight beyond the basal fifth of the wing, is represented by Dohrn as first 

 dividing in the apical third of the wing, and emitting two simple inferior branches; the 

 space, however, in the apical half of the wing between the externomedian and interno- 

 median veins is so great, that there must certainly be at least another, and that probably a 

 forking vein, originating a little beyond the middle of the wing and occupying this space. 



