On the 24th June, 1891, a mackerel boat, which had been fishing off the Runnistone, brought in several fish of the above species. They excited a good deal Of interest among the local fishermen, to whom they were quite unknown. A coastguardsman, who had seen them abroad, I forget where, declared them to be “pilot-fish,” a diagnosis with which some of the fishermen, to whom the true pilot-fish, Naucrates ductor, appeared to be known, could by no means agree. It appears, however, that from a certain similarity of habits the name is occasionally applied to the form before us, usually known to British naturalists as the black-fish.