FIG. 8--Astacus fluviatilis.-- A, two recently hatched crayfish attached to one of the swimmerets of the mother (x 4). pr, protopodite; en, endopodite; and ex, exopodite of the swimmeret; ec, ruptured egg-cases. B, chela of a recently hatched crayfish (x 10).
[Editor's note: illustration is reproduced here approximately twice the size of the woodcut in the book.]
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