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FromThe Crayfish, by T. H. Huxley, 1879

Figure 5

fig. 5, dorsal view

FIG. 5--Astacus fluviatilis.-- A male specimen, with the roof of the carapace and the terga of the abdominal somites removed to show the viscera (nat. size):--aa, antennary artery; ag, anterior gastric muscles; amm, adductor muscles of the mandibles; cs, cardiac portion of the stomach; gg, green glands; h, heart; hg, hind gut, or large intestine; Lr, liver; oa, opthalmic artery; pg, posterior gastric muscles; saa, superior abdominal artery; t, testis; vd, vas deferens.

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

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