The creation of the sixth day therefore includes--1st, the herbivorous mammalia; 2d, a variety of terrestrial reptilia, and other lower forms not included in the work of the previous day; 3d, the carnivorous mammalia. It will be observed that the order in the two verses is different. In verse 24th it is herbivora, "creeping things," and carnivora. In verse 25th it is carnivora, herbivora, and "creeping things." One of these may, as in the account of the fifth day, indicate the order of _time_ in the creation, and the other the order of _rank_ in the animals made, or there may have been two divisions of the work, in the earlier of which herbivorous animals took the lead, and in the later those that are carnivorous. In either case we may infer that the herbivora predominated in the earlier creations of the period. It is almost unnecessary to say this period corresponds with the Tertiary or Cainozoic era of geologists. The coincidences are very marked and striking. As already stated, though in the later secondary period there were great facilities for the preservation of mammals in the strata then being deposited, only a few small species of the humblest order have been found; and the occurrence of the higher orders of this class is to some extent precluded by the fact that the place in nature now occupied by the mammals was then provided for by the vast development of the reptile tribes. At the very beginning of the tertiary period all this was changed; most of the gigantic reptiles had disappeared, and terrestrial mammals of large size and high organization had taken their place. Perhaps no geological change is more striking and remarkable than the sudden disappearance of the reptilian fauna at the close of the mesozoic, and the equally abrupt appearance of numerous species of large mammals, and this not in one region only, but over both the great continents, and not only where a sudden break occurs in the series of formations, but also where, as in Western America, they pass gradually into each other. During the whole tertiary period this predominance of the mammalia continued; and as the mesozoic was the period of giant reptiles, so the tertiary was that of great mammals. It is a singular and perhaps not accidental coincidence that so many of the early tertiary mammals known to us are large herbivora, such as would be included in the Hebrew word _bhemah_; and that in the book of Job the hippopotamus is called _behemoth_, the plural form being apparently used to denote that this animal is the chief of the creatures known under the general term _bhemah_, while geology informs us that the prevailing order of mammals in the older tertiary period was that of the ungulates, and that many of the extinct creatures of this group are very closely allied to the hippopotamus. Behemoth thus figures in the book of Job, not only as at the time a marked illustration of creative power, but to our farther knowledge also as a singular remnant of an extinct