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[p21, col 1, §2

Hindlimbs form first during development of most tetrapods, and they are likely to be last to disappear, as known in snakes. The fact that hindlimbs form first and are thus often larger, may be ascribed to the narrow spacing in the caudal part of the early embryo (more below).

Ahem, hindlimbs of most tetrapods form first? Are often larger?

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