IN previous literature on the salivary glands of ticks, two types of alveoli have been recognized, namely, the multicellular, granule-secreting and the unicellular, non-granular alveoli. (1, 2, 3) In the multicellular alveoli, two cell types have been distinguished, the 'Mündungszellen' with coarse secretory granules and the 'Funduszellen' with line secretory granules.(4)