. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. FIG. Adult. 190. Margaritana margaritifera, and basal margin nearly as broad before as behind the hinge, wnich is usually curved and nearly parallel, with the tips slightly truncated. The surface is waved with lines of growth and loosely wrinkled posteriorly and towards the margin. The outside is pitchy-black, the inside has a green- ish border at the margin while the nacre is bluish-white shading to flesh- color in the centr
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. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. FIG. Adult. 190. Margaritana margaritifera, and basal margin nearly as broad before as behind the hinge, wnich is usually curved and nearly parallel, with the tips slightly truncated. The surface is waved with lines of growth and loosely wrinkled posteriorly and towards the margin. The outside is pitchy-black, the inside has a green- ish border at the margin while the nacre is bluish-white shading to flesh- color in the centre of the valves. There are two cardinal teeth in the left valve and one in the right. The mussel is 4 J^ inches long, 2 inches broad and 1 ^ inches thick, probably the largest freshwater mussel of the Atlantic slope, very generally distributed in the Eastern and Middle States. M. marginata. Fig. 191, has thin-ovate, anteriorly wedge-shaped valves with small but elevated umbones, usually somewhat eroded. The posterior hinge margin declines abruptly to form a rounded tip and a well- defined ridge extends from the um- bone to the lower forward edge and the valves show rounded wrinkles and well-defined lines of growth. The color is a polished olive-green mot- tled with lighter and darker shades and having broken or obscure radiat- ing darker green or brownish lines.. FIG. 191. Margaritana marginata. Nearly adult. 245. 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 work.. Wolf, Herman Theodore, 1855-. Philadelphia, Innes & Sons