The scolex of Aporhynchus norvegicus (Olss.)

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Abstract
The following is an account of the anatomy of the scolex of Aporhynchus norvegicus (Olss.) involving details of the musculature and nervous and excretory systems. The anatomy of the strobila has been described by Nybelin (1918). The specimens, mostly young complete strobilae, were obtained from the intestine of Spinax spinax caught in the deep-sea fishing grounds to the west of Ireland. Until recently the species had only been recorded from the coast of Norway, but in 1936 Joyeux & Baer found it in French waters. It was first described as Tetrarhynchus norvegicus by Olsson (1867), the genus Aporhynchus being created by Nybelin (1918) for the single species.