The announcement of the discovery of a Hyæna-den, near Laugharne, may possibly be of some interest to those of your readers who may be inclined to visit the bone caverns of South Wales during the approaching summer. In the autumn to last year J. R. Allen, Esq., of Albert Terrace, Regent's Park, London, was good enough to send me word that, during a few days' stay at Laugharne, he had discovered some fragments of bones in a limestone cavern known as the “Coygan cave;” adding, at the same time, that it was not known in the district that any one had hitherto found bones there, or that it had ever been explored for that purpose.