PLATE VII. 



FIG. PAGE. 



1 a. Arcliimylacrls hastata, Bolton ; greater part of left fore-wing. X 2J. 

 Base of Upper Coal Measures (Gellicleg Level of Mynyddislwyn 

 Vein) ; near Maes-y-cwmmer, Monmouthshire. Mus. Pract. Geol., 

 no. 24501. 103. 



1 b. Ditto ; counterpart of left wing, x 2f . Mus. Pract. Geol., no. 24502. 103. 



2 Archimylacris ivoodivardi, Bolton; left fore-wing. X 3J. Base of 



Pennant Series (10 feet shale overlying the No. 2 Rhondda seam) ; 

 Clydach Vale, South Wales. Mr. D. Davies' Coll. 106. 



3 a. Arcliimylacris incisa, sp. nov. ; impression of the under surface of the 



pronotum, and of the remnants of the fore-wings, x 3. Middle 

 Coal Measures (binds between the " Brooch " and " Thick " Coals) ; 

 Coseley, nr. Dudley, Staffordshire. British Museum (Johnson 

 Coll.), no. I. 15900. 107. 



36. Ditto; counterpart. X 3. 107. 



4 a. Archimylaerut obovata, Bolton ; portion of left fore-wing, x 3. Upper 



Coal Measures (Gwernau Level of the Mynyddislwyn Vein) ; Maes-y- 

 cwmmer, Monmouthshire. Mus. Pract. Geol., no. 24506. 109. 



4 b. Ditto ; impression less incomplete than the broken wing, x 3. Mus. 



Pract, Geol., no. 24507. 109. 



5. Arehimylaeris, sp. indet. ; fragmentary fore- wing, showing the middle 



third only, the rest being concealed under a leaf of Cordaites, the 

 latter bearing pits in which Spirorbis pusillus (Martin) had 

 established themselves. Much enlarged. Base of Upper Coal 

 Measures (Gellideg Level of Mynyddislwyn Vein) ; near Maes-y- 

 cwmmer, Monmouthshire. Mus. Pract. Geol., no. 24503. ] 12. 



6. Arcliimylacris, sp. indet. ; impression of the basal portion of a left 



fore-wing, and of a broken pronotum. Much enlarged. Base of 

 Upper Coal Measures (Gellideg Level of Mynyddislwyn Vein) ; near 

 Maes-y-cwmmer, Monmouthshire. Mus. Pract. Geol., no. 24508. 113. 



