Not the least interesting indications which these results afford, both to the ethnologist and the archæologist, are the evidences of native primitive races in Scotland prior to the intrusion of the Celtæ; and also the probability of these races having succeeded each other in a different order from the primitive colonists of Scandinavia. Of the former fact, viz., the existence of primitive races prior to the Celtæ, I think no doubt can now be entertained. Of the order of their succession, and their exact share in the changes and progressive development of the native arts which the archæologist detects, we still stand in need of further proof; and the assumed primeval position of the kumbe-kephalic race of Scotland is advanced here only interrogatively, and with the view of inducing others to take up the same interesting inquiry. The subject demands much more extended observation before any such conclusion can be dogmatically affirmed concerning the primitive Scottish races. We have also still to obtain the proofs of that abrupt change from the one form to the other, only to be procured as the result of numerous independent observations, but which can alone satisfactorily establish the fact of the intrusion of new races. The same evidence may also be expected to show whether the primitive race was entirely superseded by later colonists. If the Allophylian aborigines were not exterminated, but were admitted to share in the superior arts of their conquerors, some proof may yet be recoverable of the gradual progression in physical conformation as they abandoned the nomadic and wild hunter state for a pastoral life, so that they were not finally extirpated, but interfused into the mixed race which now occupies the country, as we know was to some extent the case, at a later period, with its Celtic population. Not only in the annual operations of the agriculturist, but also in the deliberate researches of the archæologist, hundreds of tumular crania have been disinterred. Of these, however, scarcely any note has been taken, nor can we hope to obtain sufficient data for the determination of the interesting questions involved in the investigation till its importance is more generally recognised. A few facts, however, have been noted from time to time, some of which, in the absence of more precise observations, may help to throw light on the physical characteristics of the primitive British races. With this view, therefore, the following additional notices are selected.