Abstract
The salivary glands of Sphaerodema rusticum consist of paired principal and accessory glands. Each principal gland is made up of a superior and an inferior lobe; the latter is differentiated into 3 regions. The accessory glands are vesicular anteriorly and tubular posteriorly. The salivary ducts originate from the hilus of the principal glands; the accessory gland ducts also open into the hilus. The salivary ducts of 2 sides meet within the salivarium to form a very short common duct. Each lobule of the principal glands consists of a syncytial epithelium, enclosing a large lumen. The lobules open either into the central longitudinal canal or into another lobule. The inferior lobe homogenate contained protease and amylase, and that of the superior lobe only amylase. The accessory glands showed weak amylase activity; they also contained a watery fluid in the vesicular part.
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