. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 116 Dr. J. D. F. Gilchrist on the Eggs and a modification. At this point it was about '04 mm. in dia- meter, but soon diminished to about "016 mm. The filament appears to be homogeneous throughout, but, if treated with hot caustic potash, it has the appearance of a thick-walled tube. At the distal pole of the egg, opposite that from which the filament arises, there is a marked differentiation of the surface of the egg, on a small" terminal area about 2 mm. in diamete
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 116 Dr. J. D. F. Gilchrist on the Eggs and a modification. At this point it was about '04 mm. in dia- meter, but soon diminished to about "016 mm. The filament appears to be homogeneous throughout, but, if treated with hot caustic potash, it has the appearance of a thick-walled tube. At the distal pole of the egg, opposite that from which the filament arises, there is a marked differentiation of the surface of the egg, on a small" terminal area about 2 mm. in diameter. This area is covered with clear polygonal markings, which vary in size, being large towards the periphery, where they fade off into the surrounding surface. Near the centre they become smaller and less distinct, and. Egg and filament of Naucrates dudor. pass into a small thickened ring, in the centre of which the micropyle may be clearly seen. There is a large perivitelline space, about a fourth of the diameter of the whole egg in breadth at the middle of the egg. In the specimen figured this breadth was *32 mm. The egg proper or yolk is an ovoid mass, somewhat more oblong in shape than the outer shell of the egg. It is clear, but granular, and no traces of vesiculations nor oil-globules were seen. In preserved material several cases were ob- served in which the yolk had shrunk away from its surrounding perivitelline substance, and, in such cases, at the distal end opposite the micropyle, a small funnel-like. 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 London, Taylor and Francis, Ltd
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Keywords: ., bookce, booksubjectbotany, booksubjectgeology, booksubjectzoology
