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Transverse sections through the pancreas of the grass snake embryo at developmental stages IV–VIII stained with phloxine and gallocyanin (A,B) and methylene blue (C). (A) Scale bar = 100 μm. (B,C) Scale bar = 20 μm. (B) Magnification of the frame in (A). Note presumptive islets. Abbreviations: G: gut; P: pancreas; Sp: spleen.
