FIG. 11--Astacus fluviatilis.--View of the roof of the stomach, the ventral wall of which, and of the mid-gut, is laid open by a longitudinal incision (x 4). On the right side (the left in the figure), the lateral tooth is cut away, as well as the floor of the lateral pouch. The letters have the same signification as in fig. 10.
[Editor's note: illustration is reproduced here approximately twice the size of the woodcut in the book.]
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