96 S. H. SCUDDER ON PALAEOZOIC COCKROACHES. 



The interne-median vein is rather strongly and regularly arcuate throughout, and termi- 

 nates probably about as far from the tip of the wing as the mediastinal vein ; it emits only 

 three similarly arcuate, long, and very distant branches. The anal furrow is not very 

 deeply impressed, rather strongly and regularly arcuate, terminating at a little before the 

 middle of the wing; as the veins originate above the middle of the base, even including 

 the anal furrow, the anal area is very large ; the anal veins, to the number of six or seven, 

 are rather distant and simple, at first arcuate, afterwards nearly straight. 



The wing is one of the smaller ones, the fragment measuring 14 mm. in length and 

 6.2 mm. in breadth, the whole wing being probably about 15.5 mm. in length, and the 

 breadth to the length as 1 : 2.5. A large part of the lower outer portion of the wing is 

 broken, but the course of the veins is pretty clear throughout; the upper surface of the 

 wing, which is a left one, is exposed, on which the veins are slightly elevated ; but the anal 

 furrow is rather indistinct and depressed, the anal area being vaulted to a considerable 

 degree, while the middle of the wing is rather concave; no ci"oss venation can be seen. 



The distant venation of the lower part of the wing, i. e., in the anal and internomedian 

 areas, is in unusual contrast to the crowded distribution of the other branches, and marks 

 this wing as very distinct from others; so, too, the narrowness and equality of the space 

 between the mediastinal and internomedian veins in the basal half of the wing is rather 

 peculiar, and allies the species to the following ; from which, however, it is remarkably dis- 

 tinct in the narrowness of the mediastinal area; in this particular, one is reminded only of 

 the preceding species, but the distribution of all the other veins is very different. Dohrn 

 and Goldenberg compare it to Hermatobl. lebachensis, with which, indeed, the general 

 resemblance is greater than with perhaps any other palaeozoic cockroach ; but besides its 

 lesser size and the comparative narrowness and equality of the mediastinal area, we find 

 the scapular branches superior, instead of being inferior, as in Hermatobl. lebachensis. 



The single specimen was found in an argillaceous schist in a coal-pit on the Remigius- 

 berge, near Cusel, in Rheinpflalz. Upper carboniferous. 



Anthracoblattina Ruckerti. PI. 4, fig. 1. 



Blattina R'delcerti Gold., Neues Jahrb. f. Mineral., 1869, 163-64, taf. 3, fig. 11. 



Fore wing. The apex of the wing only being preserved, and that not perfect, it is im- 

 possible to describe the form of the wing; the apical half of the costal border, however, is 

 preserved, showing a curve very similar to that of the species last described. The medias- 

 tinal vein, if I have rightly interpreted it, is remarkably distant from the costal margin, so 

 that the area must occupy more than a third of the width of the wing, terminating just 

 before the apical sixth of the wing, and possessing distant, simple, nearly straight, and 

 oblique branches. The scapular vein is straight or scarcely arcuate in an opposite sense to 

 the costal margin, in the outer half of the wing, and terminates scarcely before the tip, 

 dividing only in the apical third of the wing, and emitting at rather wide angles three 

 simple or forked branches. The externomedian runs down the middle line of the wing- 

 exactly parallel and close to the preceding, begins to divide at the same point, and has two 

 equally divergent, simply or doubly forked branches, occupying an exactly equivalent area 

 to those of the scapular vein. The internomedian vein is gently arcuate in the distal half 



