. Comparative anatomy and physiology. Chap, ix.] SKELETOATS OF RHIZOPODA. 275 various Rhizopods, and may take on the most different forms, and even become pigmented. In marine Rhizopods the test becomes much firmer, owing to the deposition in its substance of calcareous salts ; and as. \ Fig. 111.—Gromia terricola, showing the Protoplasm extending round the chitinous test. (After Leidy.) the test becomes traversed by pore canals, through which there pass processes of the protoplasmic body that has formed it, we get a structure which more easily falls in with our idea of a skeleton. This skelet
. Comparative anatomy and physiology. Chap, ix.] SKELETOATS OF RHIZOPODA. 275 various Rhizopods, and may take on the most different forms, and even become pigmented. In marine Rhizopods the test becomes much firmer, owing to the deposition in its substance of calcareous salts ; and as. \ Fig. 111.—Gromia terricola, showing the Protoplasm extending round the chitinous test. (After Leidy.) the test becomes traversed by pore canals, through which there pass processes of the protoplasmic body that has formed it, we get a structure which more easily falls in with our idea of a skeleton. This skeleton may be rounded and simple, or else it may give off fine projecting processes, or it may, as in Orbitolites and other Foraminifera, become. 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 Bell, F. J. (Francis Jeffrey), 1855-1924. London, Cassell
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