There was no one creature taken up this time, but all together, and some pictures were shown them of lower tribes of man, and it was decided that man must be classed with the mammals, for he is partly covered with hair, gives birth to young in his own shape, and feeds the young from mammary glands. They were told that there is a mammal, the spiny ant eater, covered with hair, which, however, lays eggs like the birds in nests. They were told about the kangaroo and opossum, who give birth to their little ones very early, and carry them in a pouch until they are able to help themselves. As soon as the little opossum is born, Mother Opossum picks him up in her mouth and places him in her pouch, where he sucks away at the milk which is secreted there, until he is strong and able to get food for himself—which is about the same length of time that other mammals carry their young before giving birth to them. They were told of the bats and the flying squirrels. They were told that Bobby’s cat must be given a new clean box, or bed; that she must not be handled roughly or chased, because she was going to have little kittens. To the utter astonishment of Bobby’s mother there was a chorus of, “How do you know?” and she realized that she might have omitted a most important piece of information. They were again reminded of the birds and the undeveloped eggs coming from the ovary of mother bird, which at a certain time become ripe for fertilization; of how the father bird at a certain time feels he has developed (since the fertilizing principle within him has developed) so that in coming in contact with the undeveloped egg within the mother’s body, these are quickened into life. The same process goes on with the mammals, but as the instinct becomes more developed as they go higher in the scale of life breeding becomes more complex. They were told that where in birds the whole egg, shell and all passes out of the mother’s body into the nest, with the mammal the shell becomes a thin skin, which envelops the little one, but remains within the mother’s body until it is grown enough and strong enough to live on the milk from the mother. While it is within the mother’s body it is fed from the blood of the mother, and all the food she eats helps to make the little ones within her strong. It is of great assistance for a mother to have some knowledge of the processes of assimilation so that the children will learn how the food products in the blood, instead of supplying the mother, go to the child to build up bone, muscle, nerves and tissues. They were told that as the mammal grows and develops within the body of the mother her shape becomes changed—becomes larger in the region where the new life lies, and that is how one could tell that Mrs. Pussy Cat was going to have a family.