. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. Fia. 401.—Heart and vasculnr trunks of Lycota, in lateral and dorsal view (after Claparede). P, Lunj^s ; C, heart; Ao, aorta ; O, eyes. Fio. 402.—Sexual organs if a Tegenaria (Philoica) domeefwa, with the abdomsn in outline (after Bertkau). T, Testis ; Vd vas deferens ; St. stigma. The vascular system is not less highly developed (fig. 401). The blood flows from the pulsating dorsal vessel placed in the abdomen, through an anterior aorta into the ce- phalo-thorax, and thence into lateral arte- ries,
. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. Fia. 401.—Heart and vasculnr trunks of Lycota, in lateral and dorsal view (after Claparede). P, Lunj^s ; C, heart; Ao, aorta ; O, eyes. Fio. 402.—Sexual organs if a Tegenaria (Philoica) domeefwa, with the abdomsn in outline (after Bertkau). T, Testis ; Vd vas deferens ; St. stigma. The vascular system is not less highly developed (fig. 401). The blood flows from the pulsating dorsal vessel placed in the abdomen, through an anterior aorta into the ce- phalo-thorax, and thence into lateral arte- ries, supplying the legs, jaws, brain, and eyes. The blood returns from these organs into the abdomen, bathes the so- called lungs, which are composed of numerous flattened tubes, and then re- turns to the dorsal vessel thi-ough three pairs of lateral slits. The ovaries (fig. 397) are two racemose glands suiTOunded by the liver; the short oviducts unite to form a single vagina, which is usually connected with two long receptacula seminis and opens on the ventral surface of the anterior part of the abdomen between the anterior stigmata. The testes consist of two long coiled canals with a common terminal duct, which likcAvise opens at the base of the Rhdomen (fig. 402).. Fia. 403.—Terminal part of the pedipalpus of Segeslria ( <J ) with the receptacle of the spermato- phores (after Bertkau).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Claus, Carl, 1835-1899; Metcalf Collection (North Carolina State University). NCRS. London, Swan Sonnenschein
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanimals, bookyear1892
