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5. Notice on the Boring of the Pholadidæ

Published online by Cambridge University Press:  16 March 2015

Alexander Bryson Esq.
Alexander Bryson Esq.
Affiliation:
President of the Royal Physical Society.
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Extract

In this communication the author referred to the various theories advanced to account for the boring of the Pholadidæ in rocks.

The first hypothesis, which supposes that the molluscs perforate by means of the rotation of the valves acting as augers, he disproved by exhibiting old individuals of the Pholus crispata with the dentated costæ as sharp as in any young specimen. That these animals bore by silicious particles secreted by the foot, as suggested by Mr Hancock, has been disproved by microscopic observation; and that currents of water set in motion by vibratile cilia, seemed also insufficient to account for the phenomenon.

Type
Proceedings 1859-60
Information
Proceedings of the Royal Society of Edinburgh , Volume 4 , 1862 , pp. 321 - 323
Copyright
Copyright © Royal Society of Edinburgh 1862

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