Published online by Cambridge University Press: 01 May 2009
The Orthopteron wing which forms the subject of the present paper was obtained by Mr. David Davies from a dark-blue shale, about 10 feet in thickness, overlying the No. 2 Rhondda coal-seam in Clydach Vale (see Plate XV). The shale decreases to the east, dying out wholly 2 miles beyond the colliery, giving place to sandstone. I am indebted to Mr. Davies for the opportunity of describing the specimen.
page 148 note 1 Scudder, , “Palæozoic Cockroaches”: Boston Soc. Nat. Hist., vol. iii, pl. vi, fig. 12.Google Scholar
page 150 note 1 Scudder, , Mem. Boston Soc. Nat. Hist. Soc., 1879, vol. iii, pl. i, No. 3.Google Scholar