Such instances are by no means singular, nor are like difficulties confined to the Eocene. In the Miocene above, about the time when Anchitherium flourished, there appeared a family with whom he might claim relationship, for they were not only akin to the Ungulates but Perissodactyles, or "odd-toed," like himself. These were the "Proboscideae"--"the beasts that bear between their eyes a serpent for a hand," in other words the Elephants and their allies. These, like other families, amongst their earliest representatives included the giants of their race, for some of their Miocene specimens[301] are about half as large again as the largest of our modern elephants. Professor Ray Lankester has recently declared[302] that we now understand the genetic affinities of these creatures, whose faces have been pulled out into trunks with the nose at the extremity, and in support of his statement he adduces the features of the cranium as exhibited in certain recently-discovered specimens. But how far can conclusions be called final which are based upon such partial evidence?[303] As M. Gaudry, convinced Evolutionist as he is, acknowledges, in regard of this very matter:[304] Like the Mastodons, the Dinotheria appeared suddenly. Whence did they come? from what quadrupeds did they spring? At present we do not know.... The points of difference [from other mammals] taken as a whole, and compared with the points of resemblance, are too great to enable us to point to any relationship between the Proboscideans and animals of other orders as yet known to us. Such then are some of the still unanswered questions connected with the genesis of the Horse, "the most famous instance of geological evidence"[305] which Professor Huxley selects as proving Evolution to demonstration. It is by no means easy to understand how it could ever be supposed to merit any such description. In view of the various difficulties recited above it can hardly be thought that there is satisfactory evidence even of the modicum of Evolution for which alone are such arguments brought, namely within the limits of the _Equidæ_. Even were the reality of this established to the full, how would such evidence compare with that we have heard, drawn not from one corner of Organic Nature, but from a review of the great lines of its history?[306] We find indeed that while Professor Huxley declares palæontology to be the main support of Evolution, other authorities tell us the exact contrary. The doctrine of organic evolution [says Sir J. W. Dawson][307] is essentially biological rather than geological, and has been much more favoured by biologists than by those whose studies lead them more specially to consider the succession of animals and plants revealed by the rocks of the earth.