. The Edinburgh new philosophical journal . • Shell-marl is met with in the glen in small quantity on the side of Loch Callader, consequently at a very considerable height above the sea, although not so high as the shell-marl on the mountain of Ben-i-gloe in Glen Tilt. Sir T. D. Lauder mentions shell-marl, in which, as is often the case, lacus- trine and land helices, &c. are intermixed, at a great height, in the farm of Inchrory, in Glen A van.

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