We should then see a case which must inevitably have happened with very many animals.
These southern seas are frequented by several species of Petrels: the largest kind, Procellaria gigantea, or nelly (quebrantahuesos, or break-bones, of the Spaniards), is a common bird, both in the inland channels and on the open sea.

In its habits and manner of flight there is a very close resemblance with the albatross; and as with the albatross, a person may watch it for hours together without seeing on what it feeds.

The "break-bones" is, however, a rapacious bird, for it was observed by some of the officers at Port St.Antonio chasing a diver, which tried to escape by diving and flying, but was continually struck down, and at last killed by a blow on its head.

At Port St.Julian these great petrels were seen killing and devouring young gulls.

A second species (Puffinus cinereus), which is common to Europe, Cape Horn, and the coast of Peru, is of a much smaller size than the P.gigantea, but, like it, of a dirty black colour.