Fig. 1 in Acanthocephalans of the nominotypical subgenus of Plagiorhynchus (Plagiorhynchidae) from charadriiform birds in the collection of the Natural History Museum, London, with a key to the species of the subgenus

Fig. 1. Plagiorhynchus (Plagiorhynchus) crassicollis (Villot, 1875). A-D (material from Dorset): A. Male, general view. B. Male, anterior end of trunk. C. Male, longitudinal row of hooks (lateral view). D. Eggs. E-G (material from unknown locality, in Great Britain): E. Male, general view. F. Male, anterior end of trunk. G. Male, longitudinal row of hooks (lateral view). Scale-bars: A, E, 1.0 mm; B, F, 0.2 mm; C, D, G, 0.1 mm.