a considerable number of Præaryan skulls, such as those of the Coles and Moosahurs, procured for me by William Duthoit, Esq., D.C.L., gives additional importance to its presence in “Malabars,” “Tamils,” Malays, and Chinese. Of course further research may discover this suture in other races of mankind; as the matter stands at present I am tempted to think that there is possibly some significance in its having been noticed in the Eskimo, the Bushman, in certain races of the Eastern Archipelago, and in Tamil skulls, as well as in the fact of its having been found to be absent in certain other skulls also of ancient races, such as the Kolarian and the Australian.[70] The main sutures I think have perhaps something peculiar about them, this consisting in their being made of denticulations which are complex but shallow, contrasting thus with the complex but deep denticulations of well developed European, and the coarse but shallow ones of Australian, crania. The verticality of the forehead observable in so many Bushman, and, indeed, in so many other African crania, is correlated with the comparative feebleness, and consequent lightness, of their lower jaws, which renders it unnecessary[71] that the brain and brain case should be rotated backwards to counterbalance the facial skeleton and to maintain the visual axis in a horizontal or semihorizontal plane. I have appended to this paper the measurements given by Professor Flower, in his recently issued (1879) _Catalogue_, of the six Bushman crania in the College of Surgeons’ Museum, pp. 246, 247, and also the same measurements, as taken by myself, of the six Bushman crania in the Oxford University Museum. The very close correspondence of the two sets of measurements will strike any one who will compare the columns which give the averages of the two sets. The fact may be expressed in technical language by saying that both lists coincide pretty nearly in showing that, as Professor Flower has phrased it at p. 255, _l.c._, the Bushman cranium is “mesaticephalic,” “orthognathous” (or, at least, mesognathous, my average being 98, which is “mesognathous,” as against Professor Flower’s 97·8, which is just below the limits of mesognathy), “platyrrhine,” “microseme,” and “microcephalic.”