THE CONTROVERSY OVER THE SOUL
THE IDEAS OF IMMORTALITY AND GOD
EXPLANATION OF PLATE III
EMBRYOS OF THREE MAMMALS AT THREE CORRESPONDING STAGES OF DEVELOPMENT
The embryos of man (M), the anthropoid ape (gibbon, G), and the bat (rhinolophus, B) can hardly be distinguished in the earlier stage (the upper row), although the five cerebral vesicles, the gill-clefts, and the three higher sense-organs are already visible. On the curved dorsal surface we see the sections of the primitive vertebræ. Even later, when the two pairs of limbs have appeared in the form of roundish fins (the middle row), the differences are not great. It is not until a further development of the limbs and head has taken place (lowest row) that the characteristic forms are clearly seen. It is particularly notable that the primitive brain, the organ of the mind, with its five cerebral vesicles, is the same in all.
PLATE III.
EMBRYOS OF THREE MAMMALS
(At three corresponding stages of development).