There is nothing imperfect in the productions of nature, although there are many organisms in which certain forms and faculties are less developed than in others. There are certainly, in particular groups, such things as rudimentary organs, which belong, as it were, not so much to the individual species, as to the general system which prevails in the larger and more comprehensive class to which such species belong; and in the majority of which these organs fulfil a frequent and obvious function, and so are very properly regarded as indispensable to the wellbeing of such as use them. But there are many examples in animal life which indicate that particular parts of structure remain, in certain species, for ever in an undeveloped state. In respect to teeth, for instance, the Greenland whale may be regarded as a _permanent suckling_; for that huge creature having no occasion for these organs, they never pierce the gums, although in early life they are distinctly traceable in the dental groove of the jaws. So the Dodo was a kind of _permanent nestling_, covered with down instead of feathers, and with wings and tail (the oars and rudder of all aërial voyagers) so short and feeble as to be altogether inefficient for the purposes of flight. Why should such things be? We cannot say. Can any one say why they should not be? The question is both wide and deep, and they are most likely to plunge into it who can neither dive nor swim. We agree with Mr Strickland, that these apparently anomalous facts are, in reality, indications of laws which the great Creator has been pleased to form and follow in the construction of organised beings,--inscriptions in an unknown hieroglyphic, which we may rest assured must have a meaning, but of which we have as yet scarcely learned the alphabet. "There appear, however, reasonable grounds for believing that the Creator has assigned to each class of animals a definite type or structure, from which He has never departed, even in the most exceptional or eccentric modifications of form." As to the true position of the Dodo in systematic ornithology, various opinions have been emitted by various men. The majority seem to have placed it in the great Rasorial or Gallinaceous order, as a component part of the family _Struthionidæ_, or ostrich tribe.