The forms built in the first round were very different from any of which we know anything now.

Properly speaking, those which were made on our physical earth can scarcely be called forms at all, for they were constructed of etheric matter only, and resembled vague, drifting and almost shapeless clouds.

In the second round they were definitely physical, but still shapeless and light enough to float about in currents of wind.
Only in the third round did they begin to bear any kind of resemblance to man as we know him today.

The very methods of reproduction of those primitive forms differed from those of humanity today, and far more resembled those which we now find only in very much lower types of life.
Man in those early days was androgynous, and a definite separation into sexes took place only about the middle of the third round.

From that time onward until now the shape of man has been steadily evolving along definitely human lines, becoming smaller and more compact than it was, learning to stand upright instead of stooping and crawling, and generally differentiating itself from the animal forms out of which it had been evolved.
One curious break in the regularity of this evolution deserves mention.