The Hyracoidea, which is a small family, the principal member of which is the coney, or rock rabbit, which has teeth resembling those of the hoofed animals, in some ways, and those of the gnawing animals in the others.
The Proboscidea, or Trunked Animals, which family is represented in this age only by the families of elephants, which have a peculiar appendage called a "trunk," which they use as an additional limb;
The Carnivora, or Flesh-eaters, represented by numerous and various forms, such as the seal, the bear, the weasel, the wolf, the dog, the lion, the tiger, the leopard, etc. The wolf and similar forms belong to the sub-family of dogs; while the lion, tiger, etc., belong to the sub-family of cats;
The Rodentia, or Gnawers, comprising the rat, the hare, the beaver, the squirrel, the mouse, etc., etc.;
The Insectivora, or Insect Feeders, comprising the mole, the shrew, the hedgehog, etc.;
The Chiroptera, or Finger-Winged Animals, comprising the great family of Bats, etc., which are very highly developed animals;
The Lemuroidea, or Lemurs, the name of which is derived from the Latin word meaning a "ghost," by reason of the Lemur's habits of roaming about at night. The Lemur is a nocturnal animal, somewhat resembling the Monkey in general appearance, but with a long, bushy tail and sharp muzzle like a fox. It is akin to a small fox having hands and feet like a monkey, the feet being used to grasp like a hand, as is the case with the true Monkey family. These creatures are classed by some naturalists among the Monkeys by reason of being "four-handed," while others are disposed to consider as still more important their marked relationship with, and affinity to, the marsupials, gnawers and insect-feeders. On the whole, these creatures are strangely organized and come very near to being a "connecting-link" between other forms. One of the Lemurs is what is known as the colugo, or "flying lemur," which resembles a squirrel in many particulars, and yet has a membranous web extending from its hands, which enables it to make flying leaps over great distances. This last named variety seems to furnish a link between the insect-feeders and the Primates;
The Primates, which is a large family comprising the various forms of monkeys, baboons, man-apes, such as the gibbon, gorilla, chimpanzee, orang-outang, etc., all of which have big jaws, small brains, and a stooping posture. This family also includes MAN, with his big brain and erect posture, and his many races depending upon shape of skull, color of skin, character of hair, etc.
In considering the Ascent of Man (physical) from the lowly forms of the Monera, etc., up to his present high position, the student is struck with the continuity of the ascent, development and unfoldment. While there are many "missing-links," owing to the disappearance of the forms which formed the connection, still there is sufficient proof left in the existing forms to satisfy the fair-minded inquirer. The facts of embryology alone are sufficient proof of the ascent of Man from the lowly forms. Each and every man today has passed through all the forms of the ascent within a few months, from single cell to the new-born, fully formed infant.
Embryology teaches us that the eggs from which all animal forms evolve are all practically alike so far as one can ascertain by microscopic examination, no matter how diverse may be the forms which will evolve from them, and this resemblance is maintained even when the embryo of the higher forms begins to manifest traces of its future form. Von Baer, the German scientist, was the first to note this remarkable and suggestive fact. He stated it in the following words: "In my possession are two little embryos, preserved in alcohol, whose names I have omitted to attach, and at present I am unable to state to what class they belong. They may be lizards, or small birds, or very young mammals, so complete is the similarity in the mode of the formation of the head and trunk in these animals. The extremities, however, are still absent in these embryos. But even if they had existed in the earliest stage of their development, we should learn nothing, for the feet of lizards and mammals, the wings and feet of birds, no less than the hands and feet of man, all arise from the same fundamental form."