94 S. H. SCUDDER ON" PALAEOZOIC COCKROACHES. 



side of the extreme apex. It is much smaller than the preceding species, from which it also 

 differs in form, in the width of the mediastinal area, and the very different distribution of 

 the scapular and externomedian branches. It probably agrees better in size with Anthr. 

 RtickertL from which it is abundantly distinct by the much earlier division of the scapular 

 and externomedian veins. From the succeeding species, Anthr. winteriana, it differs 

 strikingly in the greater width of the mediastinal area, and in the distribution of the 

 branches of the externomedian veins. 



The single specimen was found in the coal shales of Weissig, near Pillnitz, Saxony. 

 Lower Dyas. 



Anthracoblattina -winteriana. PI. 4, fig. 12. 



Blattina winteriana Gold., Neues Jahrb. f.. Mineral, 1870, 288-89, figs. 1-4; — lb., Faun. 



saraep. foss., ii, 19, 25-26, 51, taf. 1, fig. 11. 



Fore wing. The basal third or thereabouts of the wing being broken, its shape cannot 

 be fully described, but in the parts which are preserved are some unique peculiarities ; the 

 costal margin, straight in the middle of the wing, is afterwards strongly curved, and meets 

 the almost equally curved inner margin at nearly a right angle, the tip being bluntly angu- 

 lated, an extremely rare occurrence in palaeozoic cockroaches. The mediastinal vein is 

 nearly straight, in near proximity to the costal margin, and when the latter begins to curve 

 toward the apex, this curves in an opposite direction, giving the mediastinal area an elon- 

 gated lancet-shaped form ; the vein terminates at some distance before the apex, probably 

 scarcely before the apical sixth of the wing, and emits a considerable number of rather 

 distant, straight, simple or forked, oblique branches, becoming more longitudinal toward 

 the tip ; the area is probably not more than a sixth of the width of the wing, at the middle. 

 The scapular vein is rather widely separated from the mediastinal, and forks probably not 

 far from the middle of the wing, and continues then in a nearly straight line, subparallel 

 to the costal border, and terminates below the tip of the wing, being near the apex double 

 the greatest width of the mediastinal area ; it emits, at subequidistant intervals, four straight 

 longitudinal branches, the first compound, the second forked beyond the middle,.the others 

 simple, the ultimate branches much more closely crowded than the mediastinal branches. 

 The externomedian vein divides close to the base of the wing, in exactly what manner 

 cannot be said ; for in the only specimen known, three very straight veins, which most 

 probably belong to this area, appear at the basal edge of the fragment, the outer ones 

 forking once beyond the middle of the wing, all parallel to the scapular vein, and occupying 

 a small area near the extremity of the inner margin, shorter than that occupied at the 

 margin by the scapular area, and, by the nearly uniform width of the area throughout the 

 wing, forming a striking contrast to the fan-shaped disposition of the scapular branches. 

 The internomedian vein is also parallel to the same veins, showing oidy a slight tendency to 

 an arcuate course, and terminating at the same distance from the apex as the mediastinal 

 vein ; it emits four or more, rather distant, simple or forked, straight and oblique branches. 



The length of the fragment is stated by Goldenberg to be about 22 mm., its breadth 

 13 mm.; the entire length can only be roughly conjectured ; it may have been 30 mm. 

 long, or above the medium size ; its breadth was to its length probably as 1 : 2.3. Golden- 

 berg's illustration of the natural size would, however, make the fragment only 18.5 mm. 

 long, or his magnified drawing only 21 mm.; the enlargement on our plate chances to 



