Abstract
THE author has selected his material judiciously so as to give the reader an account of the principal structural and hiological features of annelids. Brief descriptions of Polygordius and of its troehosphere larva, of Nereis as a type of the Polychxta, and of the principal variations in parapodia and in a few other structural features precede the classification and the two pages devoted to the ecology of marine worms, A more summary consideration follows of the Oligochista, Hiriidinea, Myzostomida and Echiurida, the last giving the opportunity for observations on the determination of sex hi Bonellia. The comparative account of the excretory organs and the chapters on regeneration and asexual reproduction, often with accompanying changes of form, for example, in Heteronereis, are of particular interest. The figure of a troehosphere of Echiurus showing a segmented mcsoderm is incorrectly attributed to Baltzer, who stated that the mesoderm is unsegmented.
Leçons de zoologie: Annélides
Par Prof. M. Prenant (Actualités scientifiques et industrielles, 196.) Pp. 95, (Paris: Hermann et Cie, 1935.) 16 francs.
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[Book Reviews]. Nature 136, 205 (1935). https://doi.org/10.1038/136205b0
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DOI: https://doi.org/10.1038/136205b0