. Annals of tropical medicine and parasitology. Parasites. 3o8 As a rule, in the mesial portion of the sac a few coils of the vas deferens can be made out. The cirrus, when extruded, measures about 650/1 long, and is slightly thicker at the base than the apex, and its outer surface is thickly covered with spines. The atrium is about 160/U deep and 6oyu in diameter, and it opens on the external surface near the right anterior comer of the segment, its external opening having thick everted lips. Ovary. The ovary is practically in the mid line and lies towards the anterior surface of the segment,
. Annals of tropical medicine and parasitology. Parasites. 3o8 As a rule, in the mesial portion of the sac a few coils of the vas deferens can be made out. The cirrus, when extruded, measures about 650/1 long, and is slightly thicker at the base than the apex, and its outer surface is thickly covered with spines. The atrium is about 160/U deep and 6oyu in diameter, and it opens on the external surface near the right anterior comer of the segment, its external opening having thick everted lips. Ovary. The ovary is practically in the mid line and lies towards the anterior surface of the segment, it is composed of a number of discrete lobes radiating fan-wise. It is slightly asymmetrical, as. Fig. 3. S. cacatuae. Ripe proglottides, —ventral excretory vessel; —dorsal excretory vessel; ,—genital pore ; ov—ovary ; —receptaculum seniinis ; t—testes; V—vagina; —vas deferens; —vitelline gland. X 17. there are a few more lobes on the aporal than on the pore side. The ducts from the various lobes run centrally, and enter a common duct, behind the centre of the gland. This duct runs posteriorly, and just before it joins the duct from the vitelline glands is surrounded by the shell gland (fig. 3). Vitelline glands. The vitellarium is of similar structure to the ovary, being composed of a number of discrete lobes, which are united by ducts meeting in a point just in front of its centre. It is more or less divided into right and left halves, the larger of which is on the right side. It lies immediately behind the centre of the ovary. Receftactdinn and vagina. The vagina opens antero-ventral to the cirrus and passes inwards along the anterior border of the cirrus sac, slightly ventral to it. It crosses the vas deferens ventrally and runs parallel to it to enter the receptaculum seminis which lies dorsal to the vitelline and shell glands. The duct from the receptaculum. Please note that these images are extracted from scanned page image
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectparasites, bookyear19
