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J. Moll. Stud. (1999), 65, 1-19
© The Malacological Society of London 1999

The Fine Structure and Function of the Anterior Foregut Glands of Cymatium Intermedius (Cassoidea: Ranellidae)

Elizabeth B. Andrews1, A.M. Page1 and J.D. Taylor2

1 School of Biological Sciences, Royal Holloway (University of London), Egham, Surrey, TW20 0EX; 2 The Natural History Museum, London, SW7 5BD

The fine structure of the salivary glands of Cymatium intermedius is described. It is concluded that both the posterior acid secreting and anterior acinous lobes are homologous with the salivary glands of other prosobranchs. At least six different types of secretion have been identified and their possible roles discussed. The anterior lobes secrete mucin and proteins believed to be enzymes, and the posterior lobes are specialized for acid production as well as secreting protein (probably a peptide toxin). The mechanisms of acid secretion and protection from damage to the snail before its release are also considered.

(Received 12 January 1998; accepted 1 March 1998)


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