‘It may be argued that if such animals still live, they must from time to time die, and their bodies would float, and their carcases would be found, or parts of them would wash on shore. To this I say: however reasonable such arguments may appear, most animals that die or are killed in the water, sink at first to the bottom, where they are likely to have the flesh and soft parts devoured by other animals, such as crustacea, fishes, etc. etc., and sinking in the deep, the bones, being heavier than the other parts, may soon become imbedded, and thus concealed from sight.’ It was gratifying to me to find my own ideas of hibernation thus supported, the above allusion to the probability of temporary repose in marine reptiles being the first I had met with. Mr. Henry Lee, in the same issue, reminds us that the existence of gigantic cuttle-fish was popularly disbelieved until within the past five or six years, during which period several specimens—some of them fifty feet in total length—have been taken, and all doubts upon the subject have been removed. He argues, also, that during the deep-sea dredgings of H.M. ships _Lightning_, _Porcupine_, and _Challenger_, many new species of mollusca, supposed to have been extinct ever since the Chalk epoch, were brought to light, and that there were brought up by the deep-sea trawlings from great depths _fishes of unknown species, which could not exist near the surface owing to the distension and rupture of their air-bladder when removed from the pressure of deep water_.