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FromThe Crayfish, by T. H. Huxley, 1879

Figure 40

fig. 40, front somites

FIG. 40.--Astacus fluviatilis.--The opthalmic and antennulary somites ( x 3). I, opthalmic, and II, antennulary sternum; 1, articular surface for eyestalk; 2, for antennule; epm, epimeral plate; pcp, procephalic process; r, base of rostrum; t, tubercle.

[Editor's note: illustration is reproduced here approximately twice the size of the woodcut in the book.]

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