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Credit
The anatomy and physiology of the perforating instruments of Pholas dactylus : being notes read before the Brighton and Sussex Natural History Society, on the 11th November, 1858, and 10th February, 1859 / by John Robertson. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.