. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. ---P5 112. P6T 113 114 Fig. hi.—Cross section of piece of shell. X s° approximately. Fig. 112.—Section through prismatic layer. X 45- Fig. 113.—Cross section through ligament. X 26. Fig. 114.—Cross section through edge of mantle. X 35. Fixed in Gilson fluid and stained with Delafield hematoxylin and congo red. Abbreviations.—GL, granularlayer; HyL, hyaline layer; IF, inner fold; 1L, inner layer containing a few groups of calcium crystals; MF, middle fold, showing origin of periostracum (
. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. ---P5 112. P6T 113 114 Fig. hi.—Cross section of piece of shell. X s° approximately. Fig. 112.—Section through prismatic layer. X 45- Fig. 113.—Cross section through ligament. X 26. Fig. 114.—Cross section through edge of mantle. X 35. Fixed in Gilson fluid and stained with Delafield hematoxylin and congo red. Abbreviations.—GL, granularlayer; HyL, hyaline layer; IF, inner fold; 1L, inner layer containing a few groups of calcium crystals; MF, middle fold, showing origin of periostracum (Pit) from its outer edge; Mus, muscle fibers; AX, nacreous layer; OF, outer fold; PB, pigmented bands; Per, periostracum; PL, prismatic 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 United States Fish Commission. Washington, The Commission, Govt. Print. Off
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