Elementary text-book of zoology, tr Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote elementarytextbo01clau Year: 1892-1893 ' ° FIG. 381.—a, Male; b, female genital organs of A rgat (after A1. ragenstecher). T, Testes ; Vd, seminal duct; Dr, prostate gland; Go, genital opening ; Ov, ovaries ; Od, oviduct; U, uterus; Dr, glandular appendages. the itch-mites (Sarcoptidce), through which the sperm passes into the receptaculum. The males are often distinguished not only by their b Kt a

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