. The Australian zoologist. Zoology; Zoology; Zoology. A PARASITE OF THE REPRODUCTIVE ORGANS OF THE GOLDEN SWAMP FROG. 173 There is a considerable variation in size, but the average dimensions are : Breadth 8-10 u, thick- oess about 6 ". Reduction in length is the commonest variation, some individuals being approxi- mately circular, with a diameter of 7-8 ». The thickness of the outer shell or envelope is about 1 11. In some the envelope cell nuclei are visible at the posterior end of the spore. This perhaps represents a developmental stage. At the anterior end are two prominent pear-shap
. The Australian zoologist. Zoology; Zoology; Zoology. A PARASITE OF THE REPRODUCTIVE ORGANS OF THE GOLDEN SWAMP FROG. 173 There is a considerable variation in size, but the average dimensions are : Breadth 8-10 u, thick- oess about 6 ". Reduction in length is the commonest variation, some individuals being approxi- mately circular, with a diameter of 7-8 ». The thickness of the outer shell or envelope is about 1 11. In some the envelope cell nuclei are visible at the posterior end of the spore. This perhaps represents a developmental stage. At the anterior end are two prominent pear-shaped polar capsules, the average dimensions of which are 4-5 ;i in length and 2 « in breadth. Each polar capsule contains a fine, spirally-wound polar filament, which is extruded on application of acids or alkalies, and which, when fully extended, measures 90-98 /< in length. The posterior portion of the spore is occupied by the protoplasmic body—the future sporozoite or amabula. In the protoplasm there lies a relatively large iodinophilous vacuole, about 2 « in diameter. The nucleus is usually double ; sometimes there are two distinct nuclei, while rarely only one is detected. Sections of the kidnej , testis, and oviduct were cut, varying in thickness from 1 to 7 ft. In regard to staining methods. Khrlich's and Delaneld's hematoxylins gavt the best all round results, both for sections and smears, the various nuclei showing up well in some preparations. With Giemsa, differen- tiation was not so good. C'arbol luchsin acted as a differential stain for the spore ; by overstaining. 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 Royal Zoological Society of New South Wales; Royal Zoological Society of New South Wales. Proceedings. [Sydney, Royal Zoological Society of New South Wales]
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1914
