Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-23T17:18:32.470Z Has data issue: false hasContentIssue false
  • English
  • Français

The Larvæ of Polydora ciliata Johnston and Polydora hoplura Claparède

Published online by Cambridge University Press:  11 May 2009

Douglas P. Wilson
Douglas P. Wilson
Affiliation:
Student Probationer at the Plymouth Laboratory
Get access Rights & Permissions [Opens in a new window]

Summary

The developments of Polydora ciliata Johns, and Polydora hoplura Clap, are described from the egg to a very late planktonic stage in the case of the former, and to young metamorphosed individuals in the case of the latter. Only external characters are described.

In both species the eggs are laid in egg-sacs attached to the wall of the parent's burrow.

The larvae of P. ciliata are released at a stage with three chsetigerous segments and lead a long planktonic life.

The larvae of P. hoplura are provided with special food in the form of yolk-masses ; they undergo most of their development while in the protecting burrow of their parent; are released at a very late stage, and have only a short planktonic life.

The larvae of both species have a complicated vestibule surrounding the mouth, and are provided with special sensory cilia on the head.

The larvae are provided with a special kind of cilia, situated at the ends of every nototroch, which are used to take hold of the long provisional bristles in swimming. This suggests that one of the functions of the long bristles is that, in conjunction with these grasping-cilia, they increase the rigidity of the swimming larva, and hence the efficiency of its driving cilia.

Previous references to Polydora larvae are briefly discussed.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 15 , Issue 2 , April 1928 , pp. 567 - 603
Copyright
Copyright © Marine Biological Association of the United Kingdom 1928

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

7. REFERENCES

1Agassiz, A. 1866. On the Young Stages of a Few Annelids. Ann. Lyceum Nat. Hist., New York. Vol. VIII.Google Scholar
2Andrews, E. A. 1891. A Commensal Annelid. Amer. Nat., Vol. XXV.Google Scholar
3Carazzi, D. 1893. Revisione del genere Polydora Bosc. e cenni su due specie che vivono sulle ostriche. Mitt. Zool. Sta. Neapel. Bd. XI.Google Scholar
4Claparède, A. R. E.. 1863. Beobachtungen über Anatomie und Entwicklungsgeschichte Wirbelloser Thiere.Google Scholar
5Claparède, E., and Mecznikow, E.. 1868. Beiträge zur Kenntniss der Entwickelungsgeschichte der Chætopoden. Zeit. wiss. Zool. Bd. XIX.Google Scholar
6Gravely, F. H. 1909. Polychæt Larvæ. L.M.B.C. Memoir XIX.Google Scholar
7Gravely, F. H. 1909. Studies on Polychset Larvæ. Quar. Jour. Micro. Sci., Vol. 53.Google Scholar
8Gravier, C. 1923. La Ponte et l'lncubation chez les Annélides Polychètes. Ann. des Sc. Nat. Zool, 10e série. T. VI.Google Scholar
9Häcker, V. 1898. Die pelagischen Polychæten- und Achætenlarven der Plankton-Expedition. Erg. der Plankton-Exped. der Humboldt-Stiftung. Bd. II, H.d.Google Scholar
10Leschke, M. 1903. Beiträge zur Kenntniss der pelagischen Polychætenlarven der Kieler Föhrde. Wiss. Meer. Kiel. Bd. VII.Google Scholar
11Mcintosh, W. C. 1915. A Monograph of the British Marine Annelids. Vol. III.Google Scholar
12Mesnil, F. 1896. Éludes de Morphologie Externe chez les Annélides. 1. Les Spionidiens des Côtes de la Manche. Bull. Sc. de la France et de la Belgique. T. XXIX.Google Scholar
13Mesnil, F., and Caullery, M. 1917. Un nouveau type de dimorphisrne évolutif chez une Annélide Polychète (Spio Martinensis Mes.). Compt. Rend. de l'Acad. des Sci. T. 165.Google Scholar
14Örsted, A. S. 1843. Annulatorum Danicorum Conspectus.CrossRefGoogle Scholar
15Saint-Joseph, , Baron de. 1894. Les Annélides Polychètes des Côtes de Dinard. Ann. Sc. Nat. Zool. 7e série. T. XVII.Google Scholar
16Söderström, A. 1920. Studien über die Polychätenfamilie Spionidæ.Google Scholar
17Whitelegge, T. 1890. Report on the Worm Disease affecting the Oysters on the Coast of New South Wales. Records of the Australian Museum, Vol. I.Google Scholar