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except its homological

development & rudimentary organs; but for thus such evidence conclusive evidence these afford, as it appears to me, sufficient & decisive evidence. may be derived.)

(Turning now to man. It is notorious that he is built on the same model with other mammals: every bone in his skeleton can be compared with a corresponding bone in a monkey, horse, bat or whale. So it is with all his muscles, nerves, blood vessels & internal

[Descent 1: 2: "The homological structure, embryological development, and rudimentary organs of a species, whether it be man or any other animal, to which our attention may be directed, remain to be considered; but these great classes of facts afford, as it appears to me, ample and conclusive evidence in favour of the principle of gradual evolution. The strong support derived from the other arguments should, however, always be kept before the mind."

Descent 1: 10: "The Bodily Structure of Man.—It is notorious that man is constructed on the same general type or model with other mammals. All the bones in his skeleton can be compared with corresponding bones in a monkey, bat, or seal. So it is with his muscles, nerves, blood-vessels and internal viscera."]