Abstract
Complete specimens of this nematode are difficult to obtain, owing to the manner in which the worms bury themselves in the tissues of the urinogenital system of the Cetacea in which they are found. Mr A. G. Bennett, to whom the writer has previously been indebted on more than one occasion for Crassicauda material, has recently sent home further interesting specimens from South Georgia, accompanied by notes and a sketch which throw some light upon the burrowing habits of the worm. A special effort was made to obtain complete specimens by dissection.

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