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Fig. 4. SEM micrographs of the glandular surface. (A) General view of the surface. (B) Gland of the upper part of the digestive zone. (C) Gland of the middle part of the digestive zone. (D) Surface of the gland. (E) Crystals on the gland surface. Arrows show the direction to the peristome. CR, crystal; GL, gland; HD, hood.