. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 150 P. L. CLODE AND A. T. MARSHALL #**•£ ' ; •,._*•'•*--••• *"'••• '•-. Figure 7. Clusters of fusiform crystals forming a semisolid crystalline mass along the lateral edge of a Galaxea fascicularis exsert septum. Scale bar = 1 jiun. Figure 8. Fusiform crystals (*) upon a primary septum extending into the calyx of an Acropora formosa axial corallite. Scale bar = 1 fjm. Figure 9. An isolated fusiform crystal from a Calaxea fascicularis exsert septum, shown in increasing magnifications. At high magnification, the surface o
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 150 P. L. CLODE AND A. T. MARSHALL #**•£ ' ; •,._*•'•*--••• *"'••• '•-. Figure 7. Clusters of fusiform crystals forming a semisolid crystalline mass along the lateral edge of a Galaxea fascicularis exsert septum. Scale bar = 1 jiun. Figure 8. Fusiform crystals (*) upon a primary septum extending into the calyx of an Acropora formosa axial corallite. Scale bar = 1 fjm. Figure 9. An isolated fusiform crystal from a Calaxea fascicularis exsert septum, shown in increasing magnifications. At high magnification, the surface of the tapered polycrystallite is seen to be covered in small, spherulitic crystals. Scale bars: A = 1 /nm: B = 200 nm: C = 100 nm. Figure 10. Transverse section through a freeze-substituted Galaxeafascicularis septum, viewed with polarized light, showing granular centers of calcification (C) and centrically arranged fascicles (*) radiating from these centers of calcification to form fanlike trabeculae. An array of trabeculae forms the entire septum. Scale bar = 100 jiim. Discussion The most significant finding of this investigation is the presence of nanocrystals at the major growth points—the denticles—on the skeletal septa of Galaxea fascicitlari*. These nanocrystals may represent nucleation sites for the deposition of acicular crystals that ultimately form fanlike systems, or fascicles, of polycrystalline fibers, which are the major building blocks of the skeleton. Also found on septa were clusters of acicular crystals forming fasciculi, fusiform. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 18
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