Text-book of comparative anatomy . FIG. 250.—Genital organs of Squilla mantis(after Grobben). A, Male, B, female organs, ct,Posterior end of the cephalo - thoracic shield; VI,VII, VIII, the 3 hinilermost free thoracic segments ;t, testis ; vd, vas deferens ; d, appended glands ; or,ovary ; od, oviduct; rs, receptaculum seminis. Fio. 251.—Sexual organs of As-tacus. .4, female, .B, male organs, ov,Ovary; «, unpaired portion of thesame; od, oviduct; oe, genital api-r-ture; t, testes ; vd, vas deferens (afterHuxley). The female genital apertures very often (Isopoda, Anisopoda) only appear at the t
Text-book of comparative anatomy . FIG. 250.—Genital organs of Squilla mantis(after Grobben). A, Male, B, female organs, ct,Posterior end of the cephalo - thoracic shield; VI,VII, VIII, the 3 hinilermost free thoracic segments ;t, testis ; vd, vas deferens ; d, appended glands ; or,ovary ; od, oviduct; rs, receptaculum seminis. Fio. 251.—Sexual organs of As-tacus. .4, female, .B, male organs, ov,Ovary; «, unpaired portion of thesame; od, oviduct; oe, genital api-r-ture; t, testes ; vd, vas deferens (afterHuxley). The female genital apertures very often (Isopoda, Anisopoda) only appear at the tinmof the formation of the brood pouch. Peculiar phenomena appear at the time ofreproduction in the Oniscidcv. The two receptacula (representing invaginations ofthe outer integument) are at first not in open communication with the ends of theoviducts. Only after sperm has, during copulation, entered the receptacula, do they 376 COMPARATIVE ANATOMY CHAP. pass into the oviducts by the bursting of their walls, and thus bring abo
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
