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“Scotia” Collections. On Echinorhynchus antarcticus. n. sp., and its Allies

Published online by Cambridge University Press:  15 September 2014

John Rennie
John Rennie
Affiliation:
University of Aberdeen.
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Extract

The form described in the present paper was found amongst the contents of the stomach of a Weddell seal (Leptonychotes weddelli), taken by the Scottish National Antarctic Expedition in Scotia Bay, South Orkneys. In all about sixty specimens were collected. They occurred unattached amongst material in a semi-fluid condition, so that it is not possible to state definitely whether the seal or some animal upon which it fed is the normal host of this parasite. This question, however, in the case of the Echinorhynchi, appears from the work of de Marval to be one of minor importance. He has shown that in the Echinorhynchi of birds there is a most marked absence of specialisation of hosts, and quotes from other authors various instances of the same parasite occurring in different vertebrate classes. The worms in the present case showed no indication of having been affected by the digestive juices of the seal. As will appear from the description given below, their structural peculiarities suggest relationships with certain forms known to inhabit aquatic birds.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 26 , Issue 1 , 1906 , pp. 437 - 446
Copyright
Copyright © Royal Society of Edinburgh 1906

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References

page 437 note * Revue Suisse de Zoologie, tome 13, fasc. 1, pp. 195–387.

page 444 note * Tom. Cit. pp. 281, 308, and 318.

page 445 note * De Marval thus distinguishes the neck and false neck:—“Nous appelons ‘cou’ tout organe nettement délimité du corps, soit par un éranglement, soit par une ligne de démarcation bien nette, contenant totalement ou en partie seulement la poche qui vient s'insérer à son bord antérior. Le cou, non invaginable, supporte a sou extrémité le rostre, qui, la plupart, du temps, semble ne former avec lui qu'un seul et même organe…. Nous appellerons par contre ‘faux eou’ toute partie délimitée ou non du corps, nue ou garnie de petits aiguillons, et n'étant somme toute que le corps proprement dit effilé en avant, ou la base du rostre tres allongée. Nous parlerons done, dans la suite, suivant le cas, d'un cou et d'un faux cou, nus ou armés.”