Discovery reports (1940) Discovery reports discoveryreports19inst Year: 1940 236 DISCOVERY REPORTS Fig. 17. a. Thin section through antennal gland of embryo showing thick walled intracellular duct, four cells forming sphincter and end sac with thick walls penetrated by intracellular cavities, b. Thin section through antennal gland of adult. The end sac wall has become much folded and in its crypts can be seen blood cells with peculiar amoeboid processes. The duct is very thin walled—the wall is represented by the thick black line only—and is covered on its inner side by gland cells, c. Th
Discovery reports (1940) Discovery reports discoveryreports19inst Year: 1940 236 DISCOVERY REPORTS Fig. 17. a. Thin section through antennal gland of embryo showing thick walled intracellular duct, four cells forming sphincter and end sac with thick walls penetrated by intracellular cavities, b. Thin section through antennal gland of adult. The end sac wall has become much folded and in its crypts can be seen blood cells with peculiar amoeboid processes. The duct is very thin walled—the wall is represented by the thick black line only—and is covered on its inner side by gland cells, c. Thin section through sphincter. d. Surface view of sphincter, blood cells; a: crypts ramifying in end sac wall; wall of end sac; gland cells; Leo. openings leading into intracellular crypts from the outer surface of the end sac epithelium.
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