. Ecological animal geography; an authorized, rewritten edition based on Tiergeographie auf ockologischer grundlage. Zoogeography -- Geographical distribution; Animal ecology. 168 MARINE ANIMALS tropics, where the reef corals build gigantic masses of rock. Tropical mollusks often have shells of great thickness; the snail Magilus, living among coral reefs (Fig. 15), as its shell lengthens with increasing age, fills a large part of it with lime. The shells of the giant clam Tridacna gigas may reach a weight of more than 250 kg. In very cold waters, the calcium in the sea water is inaccessible to
. Ecological animal geography; an authorized, rewritten edition based on Tiergeographie auf ockologischer grundlage. Zoogeography -- Geographical distribution; Animal ecology. 168 MARINE ANIMALS tropics, where the reef corals build gigantic masses of rock. Tropical mollusks often have shells of great thickness; the snail Magilus, living among coral reefs (Fig. 15), as its shell lengthens with increasing age, fills a large part of it with lime. The shells of the giant clam Tridacna gigas may reach a weight of more than 250 kg. In very cold waters, the calcium in the sea water is inaccessible to the marine animals, and the tropical forms with strong shells or skeletons of this material are accordingly often replaced in polar seas by naked or soft forms, with- out shell or with a delicate chitinous armor, as among Coccolitho- phoridae, Foraminifera, and Pteropoda. The serpulid worms which build lime tubes also reach their highest development in tropical seas, r'r*fc. 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 Hesse, Richard, 1868-1944; Allee, W. C. (Warder Clyde), 1885-1955; Schmidt, Karl Patterson, 1890-1957. New York : J. Wiley & Sons, Inc. ; London : Chapman & Hall, Limited
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectanimalecology
