CHAPTER IV.

Yellow-hued Houses of Elgin--Geology of the Country indicated by the coloring of the Stone Houses--Fossils of Old Red north of the Grampians different from those of Old Red south--Geologic Formations at Linksfield difficult to be understood--Ganoid Scales of the Wealden--Sudden Reaction, from complex to simple, in the Scales of Fishes--Pore-covered Scales--Extraordinary amount of Design exhibited in Ancient Ganoid Scales--Holoptychius Scale illustrated by Cromwell's "fluted pot"--Patrick Duff's Geological Collection--Elgin Museum--Fishes of the Ganges--Armature of Ancient Fishes--Compensatory Defences--- The Hermit-crab--Spines of the Pimelodi--Ride to Campbelton--Theories of the formation of Ardersier and Fortrose Promontories--Tradition of their construction by the Wizard, Michael Scott--A Region of Legendary Lore. 307