The functional anatomy of the cysticercoid of Choanotaenia crassiscolex (Linstow 1890) (Dilepididae) from the digestive gland of Oxychilus cellarius (Müll) (Stylommatophora), with some observations on developmental stages

Abstract

1. Four stages in the development of Choanotaenia crassiscolex are described with the help of five text figures and one plate.2. The functional anatomy of the cysticercoid is given with the help of diagrams.3. The identification is based on comparisons with material at the British Museum of Natural History, South Kensington, London, and comparison is made with earlier records in Table 1.4. The unusual cyclophyllidean scolex is discussed and tentative suggestions and queries concerning the general form of the early cysticercoid are put forward.5. An attempt is made to determine more precisely than has hitherto been done for cysticercoids, the relationship of parasite and host.