] 0(5 



FOSSIL TXSKCTS OK TIIK MIUTISH COAL MEASURES. 



A. liitxlittn is closely allied to the French species, but the divisions of the main 

 veins are fewer and of a more simple nature. I see no reason to remove the 

 British species from the genus Archimylqcris, and would refer the French example 

 also to the same genus. This view is now accepted by I'nivost (In,-, elf., p. ].">8). 



Archimylacris woodward!, Bolton. Plate VII, fig-. 2; Text-figure :U. 



1910. ArrJilmi/Iiicris (Etoblattlna) u-uwJ irt< nl i , Bolton, Geol. Mag. [5], vol. vii, pp. 147 1M, pi. xv, 

 figs. 1 1 . 



Tijpi'. A left tegmen or fore-wing, IS mm. long and 10 mm. wide; collection 

 of Mr. I). Davies, F.G.S. 



Horizon inn! Lurnliti/. (V>al .Measures (a ten-foot shale overlying the Xo. - 

 Rhondda Seam, base of the Pennant Scries] ; ( 'lydach Vale. South \Vales. 



/' ( 'Inii-iii'fi',:-!. Wing short and broad. Apex well rounded and merging 



Fio. 34. Archimylacris woodooardi, Bolton ; diagram of wing-venation of left fore-wiiif*. three times 

 natural size. Base of Pennant Series imof ,,f ton-t'<".t slink overlying the No. -' KliomLla Senin) ; 

 <'lyilacli Vale, South Wales. 1'avi'l Davies Collection. 



into costal border. Anal area convex. Interstitial neuration of abundant stout 

 cross-nervures, occasionally uniting laterally. 



Description. -The tegmen, which is short, broad and strongly chitinous, lies 

 with the convex dorsal surface uppermost. The well-rounded outer margin of the 

 wing merges into the equally well-rounded apex. The inner margin is nearlv 

 straight, a slight hollowing only of the' middle portion being shown. Notwith- 

 standing its small si/e, the details of the wing art 1 very clear, the veins and the 

 interstitial neuration being well shown. The basal portions of the main veins are 

 elevated above the surface, the rest of their length and also their divisions being 

 sunk below I he general level. 



The subcostal vein is weak, and sunk along its whole course. It is widelv 

 separated from the costal margin, following a parallel course to beyond the middle 

 of the wiiiu 1 , where it bends outward and joins the margin. The subcosla gives 

 off a numerous scries of forked and simple divisions to the costal margin. 



The radius arises close to the subcosla and median, diverging from the former 

 in the middle of its length, ami approaching it again by the lirsi of the four outer 



