. 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. 688 THE GENERATIVE ORGANS. The body of the testis is seen at this period, in sections, in the anterior part of the fifth abdominal segment. It consists of small closely-packed cells which have a radial arrangement, surrounded by a distinctly differentiated capsule of mesoblastic cells. The Ovary is smaller than the testis on the third day ; it
. 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. 688 THE GENERATIVE ORGANS. The body of the testis is seen at this period, in sections, in the anterior part of the fifth abdominal segment. It consists of small closely-packed cells which have a radial arrangement, surrounded by a distinctly differentiated capsule of mesoblastic cells. The Ovary is smaller than the testis on the third day ; it is pyriform, and measures "2 mm. in its long diameter. The genital cord is continuous with its posterior extremity or apex. The genital cord of the ovary is much more slender than that. Fio. 99.—A section through the ovary and genital cord, from a pupa al)out three days old. ,? f, genital cord ; ;«, mesoblastic stroma of the ovary ; h, neck of the ovary ; y, yelk-stocks. of the testis, it does not join its fellow, and has a length of about 2' mm.; it terminates by joining a minute vesicular in- vagination of the hypodermis on the ventral surface of the abdomen immediately in front of the position of the future anus. At this period the genital cord is a solid string of small cells similar to those which form the apex of the ovary, sur- rounded by a very thin, apparently structureless, sheath con- tinuous with the peritoneal coat of the ovary. In sections, the ovary is seen to consist of a solid cellular. 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
