VOL. XIV. (2) RHATIC ROCKS 147 
finely serrated trenchant edges,’ and a few doubtful 
specimens.” 
Above bed 15 are shales which show an increase of 
6 inches on Wainlode, and these are capped bya sandstone 
band containing, in abundance, casts of MWodiola minima 
and “ Pullastra.” 
The same palzontological horizon as at Wainlode 
succeeds, and supplies a useful datum-line for correlation 
purposes—the same thickness being ‘retained as at that 
section. 
In thickness, bed 8 varies but 5 inches from that 
assigned to it at Wainlode, and near the top, 17 inches 
below bed 7, is a horizon marked by Avzcula contorta, 
and various species of Schzzodus in an otherwise unfossi- 
liferous deposit. 
Capping these shales is a bed which I consider, both from 
paleontological and stratigraphical evidence, to be the 
equivalent of bed 7 at Wainlode. The fossils in this bed 
are numerous, but difficult of extraction. This bed, 
together with the hard bluish-grey nodular limestone 
immediately above, Etheridge regarded as the “ Upper 
Pecten-bed.”. He named bed 9 in my section as his 
“ Lower Pecten-bed,” but he did not record Pecten valonz- 
ensis from it. It is evident from what has been already 
stated in connexion with the correlation of the subjacent 
deposits at Coomb Hill and Wainlode Cliff, that the bed 
numbered 7 at these localities? is a contemporaneous 
deposit, but it is somewhat uncertain what bed the 
nodular limestone immediately above represents. At 
1 This tooth is figured by J. W. Davis under the specific name of Paleosaurus ? 
Stricklandi. He observed : “ This tooth has the appearance of having been washed and 
waterworn. The broken portion is smooth and polished; and it is probable that it may 
have been derived from an older rock, and re-deposited amongst the remains of the Fishes 
and Saurians of the Rheetic age.” Quart. Journ. Geol. Soc., Vol. xxxvii. (1881), p. 420. 
Pl. xxii., Fig. 6. 
2 Memoirs, p. 158. 
3 The lower part only of the bed at Coomb Hill and Norton. 
K2 
