GIGANTIC BIRD OF NEW ZEALAND. In the fine Museum of the Royal College of Surgeons, in Lincoln's-inn-fields, is a most interesting illustration of the pitch to which comparative anatomy has reached in this country; the result of an immense induction of particulars in this noble science. Such is the Skeleton of the Dinornis of New Zealand, which the visitor will immediately recognise on the left side of the old Museum, having the skeleton of O'Brien, the Irish giant, on its right. The means by which the Museum obtained this valuable acquisition is thus graphically described in Mr. Samuel Warren's truthful and eloquent lecture on "The Intellectual and Moral Development of the Present Age: "— In the year 1839, Professor Owen was sitting alone in his study, when a shabbily-dressed man made his appearance, announcing that he had got a great curiosity which he had brought from New Zealand, and wished to dispose of it to him. Any one in London can now see the article in question, for it is deposited in the Museum of the College of Surgeons, in Lincoln's-inn-fields. It has the appearance of an old marrowbone, about six inches in length, and rather more than two inches in thickness, with both extremities broken off: and Professor Owen considered that, to whatever animal it might have belonged, the fragment must have lain in the earth for centuries. At first he considered this same marrow-bone to have belonged to an ox—at all events, to a quadruped; for the wall or rim of the bone was six times as thick as the bone of any bird, even the ostrich. He compared it with the bones in the skeleton of an ox, a horse, a camel, a tapir, and every quadruped apparently possessing a bone of that size and configuration; but it corresponded with none. On this he very narrowly examined the surface of the bony rim, and at length became satisfied that this monstrous fragment must have belonged to a bird!—to one at least as large as an ostrich, but of a totally different species; and consequently one never before heard of, as an ostrich was by far the biggest bird known. From the difference in the strength of the bone, the ostrich being unable to fly, so must have been unable this unknown bird: and so our anatomist came to the conclusion that this old shapeless bone indicated the former existence, in New Zealand, of some huge bird, at least as great as an ostrich, but of a far heavier and more sluggish kind. Prof. Owen was confident of the validity of his conclusions, but could communicate that confidence to no one else; and, not withstanding attempts to dissuade him from committing his views to the public, he printed his deductions in the "Transactions of the Zoological Society" for the year 1839, where, fortunately, they remain on record as conclusive evidence of the fact of his having then made this guess, so to speak, in the dark. He caused the bone, however, to be engraved; and having sent a hundred copies of the engraving to New Zealand, in the hopes of their being distributed and leading to interesting results, he patiently waited for three years, viz., till the year 1842, when he received intelligence from Dr. Buckland, at Oxford, that a great box, just arrived from New Zealand, consigned to himself, was on its way, unopened, to Professor Owen; who found it filled with bones, palpably of a bird, one of which was three feet in length, and much more than double the size of any bone in the ostrich! And out of the contents of this box the Professor was positively enabled to articulate almost the entire skeleton of a huge wihgless bird, between ten and eleven feet in height, its bony structure in strict conformity with the fragment in question; and that skeleton may be at anytime seen at the Museum of the College of Surgeons, towering over, and nearly twice the height of the skeleton of an ostrich; and at its feet is lying the old bone from which alone consummate anatomical science had deduced such an astounding reality: the existence of an enormous extinct creature of the bird kind, in an island where previously no bird had been known to exist larger than a pheasant or a common fowl! The paper on which he even sketched the outline of the unknown bird, is now in the hands of an accomplished naturalist in London-Mr. Broderip.