. 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. THE EXTERNAL GENERATIVE ORGANS. 743 The Great Apodemes.—The whole penis is supported bj' two great apodemes, which are united in the middle line. They articulate with the saddle of the paraphalli and receive the insertion of a large mass of muscles, which arise partly from the genital sternum and partly from the terga of the genital somites. Th
. 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. THE EXTERNAL GENERATIVE ORGANS. 743 The Great Apodemes.—The whole penis is supported bj' two great apodemes, which are united in the middle line. They articulate with the saddle of the paraphalli and receive the insertion of a large mass of muscles, which arise partly from the genital sternum and partly from the terga of the genital somites. The action of these muscles is to rotate the penis from its position of rest, and to render tense the loose syndesmosis by which the saddle of the paraphalli is articulated with the. l-'ic;. io5.—A ventral view of the internal or anal valves of the male Blow-fly. a, anus; d, dorsal scale of valve; /, internal valve; vi, retractor muscle; r, rectum. genital sternum. The organ is considerably elongated by this movement; probably its length is increased by about one half. The Bulb (Pis. LI. and LII., 6).—Two chitinous plates on the upper aspect of the root of the penis, behind the ventral processes of the paraphalli, form a bulbous enlargement at the base of the organ. This bulb is notched in front, so that it exhibits two rounded lobes. The Meso- and Meta-genital Somites.—These somites are un-. 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
