Phi'tngraiilie 1 liy Uoilfiey Bingley. Ht-atlini-'ley. Leeds. 
Fig. 1. 
SIDE OF :\i<)r(;nT(tN from chi'm mackdai.k. 
— f'arlioniferous 
Liine.stone. 
- Silurian. 
I'hDtogr.ii.lied liy (ifxlfiey Bingley. Ileadingley, Leeds. 
Fig. 2. 
UNCONFORMITY AT ARCO WOOD. 
Proc. Yorl-y. a^ol. and PohjUc. Sor.. TV. A'T^. P/afe XL. 
