FIG. 37.--Astacus fluviatilis.--Appendages of the left side of the abdomen ( x 3). A, the posterior face of the first appendage of the male; B, the same of the female; C, posterior, and C', anterior faces of the second appendage of the male; D, the third appendage of the male; E, the same of the female; F, the sixth appendage. a, the rolled plate of the endopodite; b, the jointed extremity of the same; bp, basipodite; cx.p., coxopodite; en.p., endopodite; ex.p., expodite.
[Editor's note: illustration is reproduced here approximately twice the size of the woodcut in the book.]
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