. The biology of Stentor. Stentor. FINE STRUCTURE 45 Extensive studies on pigment granules in coeruleus were made by Weisz (1949a, 1950a). He found them to have a basophiUc core of protein pigment, surrounded by a phosphoHpid shell, and to give a negative test for RNA but positive for cytochrome 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 Tartar, Vance, 1911-. New York, Pergammon Press

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