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Mr. De Rance & The Rev. T. G. Bonney on Surface-Geology and Lythodomous Perforations

Published online by Cambridge University Press:  01 May 2009

D. Mackintosh
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Abstract

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Type
Correspondence
Information
Geological Magazine , Volume 7 , Issue 67 , January 1870 , pp. 47 - 48
Copyright
Copyright © Cambridge University Press 1870

References

1 On coasts now existing, the sea makes a headland, and in time breaks it up.

2 Or to marl-pits on the sides of drift-knolls.

3 Mr. Cameron, of the Geological Survey, Ulverstone, has in his possession a disused limestone gate-post I found on a roadside near Birkrigg Moor. On one part of it there is a group of deep holes more regularly ground out than a hole made by an iron jumper on the same slab of rock. From one of these holes Mr. Cameron extracted seventeen land-shells! Did each of the snails take a turn at boring, while the others rested from their labours ? or did one snail bore the hole, and then extend to a number of brother snails the benefit of a sheltered habitation ? The late Dr. S. P. Woodward decided against the snail-theory of M. Bouchard-Chantereaux, and Miss Hodgson, now revived by the Rev. T. G. Bonney. (See Editorial Note to my article on Pholas-borings, Geol. Mag., Vol. IV., July, 1867.)