FIG. 73.Penæus semisulcatus. A, adult (after de Haan, 1/2 nat. size); B, Zoæa, and C, less advanced Zoæa of a species of Penæus.D, Nauplius. (B, C, and D, after Fritz Müller.)
[Editor's note: illustration is reproduced here approximately twice the size of the woodcut in the book.]
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