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Updated: August 2, 2026
All the other vertebrates have a compressed, thick, pouch-shaped heart, which develops from the wall of the gut at the throat, and from which the blood-vessels proceed; in the Amphioxus there is no special centralised heart, driving the blood by its pulsations.
Over the whole is a mantle of tender vegetation, rich in every hue that a flora of more than three thousand species can give, and kept green by mists and gentle rains. Indenting the rock-bound coasts are a hundred pouch-shaped harbors such as are but rarely found in the other islands and shores of the American Mediterranean.
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