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FromThe Crayfish, by T. H. Huxley, 1879

Figure 3

fig. 3, ventral view

FIG. 3--Astacus fluviatilis.--Ventral or sternal views (nat. size). A, male; B, female:-- a, vent; gg, opening of the green gland; lb, labrum; mt, metastoma or lower lip; od, opening of the oviduct; vd, that of the vas deferens. 1, eye-stalk; 2, antennule; 3, antenna; 4, mandible; 8, second maxillipede; 9, third or external maxillipede; 10, forceps; 11, first leg; 14, fourth leg; 15, 16, 19, 20, first, second, fifth, and sixth abdominal appendages; X, XI, XIV, sterna of the fourth, fifth, and eight thoracic somite; XVI, sternum of the second abdominal somite. In the male, the 9th to the 14th and the 16th to the 19th appendages are removed on the animal's left side: in the female, the antenna (with the exception of the basal joint) and the 5th to the 14th appendages on the animal's right are removed; the eggs also are shown attached to the swimmerets of the left side of the body.

[Editor's note: original printed illustration was about 2.5in (6.5cm) vertical by 3.5in (9cm) horizontal.]

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