. The anatomy, physiology, morphology and development of the blow-fly (Calliphora erythrocephala.) A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author;. Blowflies. 672 THE GENERATIVE ORGANS. their widest part. The azygos oviduct in the same condition is about 2 mm. in length, and is nearly i mm. in breadth when seen flattened out after dissection. During the transit of the ova the oviducts become greatly elongated ; the tubs usually each contain an ovum, whilst the azygos oviduct often contains. Fig 94. —
. The anatomy, physiology, morphology and development of the blow-fly (Calliphora erythrocephala.) A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author;. Blowflies. 672 THE GENERATIVE ORGANS. their widest part. The azygos oviduct in the same condition is about 2 mm. in length, and is nearly i mm. in breadth when seen flattened out after dissection. During the transit of the ova the oviducts become greatly elongated ; the tubs usually each contain an ovum, whilst the azygos oviduct often contains. Fig 94. — Transverse sections of the parovaria of the Blowlly. A, section through a mature parovarium ; B, a single cell from the same, showing the included corpuscle, the germ ovum, and the nucleus; C, a section of the parovarium in a less developed condition ; D, a section showing the adjacent fat body ; E, section through an immature parovarium. All the figures except D represent the structures as they appe^.r with a Vi oil-immersion objective, y; fat-cells ; «, nuclei ; 0, germ ovum ; v, vitelline vesicle ; =, zona radiata. two or three, so that the whole length of the tube must exceed 4 mm. And sections show that its course is exceedingly tor- tuous. The ducts of the parovaria open into the anterior part of the sacculus. The Parovaria.—The glands which I term parovaria in the Blow-fly are simple tortuous, rather than convoluted, 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 Lowne, Benjamin Thompson, 1839-. London, Pub. for the author by R. H. Porter
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Keywords: ., bookcentury1800, bookcollectionbiod, bookdecade1890, bookyear1890
