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Leçons de zoologie et biologie généale

    Naturevolume 134page721 (1934) | Download Citation

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    Abstract

    In a brief account of the coelenterates, sponges and worms, in which structure is subservient to biology and life-history, is a number of explanatory references of interest to the general reader. Prof. Bohn records that at the time of the battle of the Yser, soldiers who had bathed several times in the sea of£ Pas de Calais and had been stung by the large jelly fishes were gravely indisposed and some died. This serves as an introduction to a short account of anaphylaxy. The swarming of Heteronereis is graphically described and referred to as an impressive scene of life and death–the males circling round the females and rendering the sea-water milky by their discharged sperms, the sudden rupturing of the bodies of the females and the liberation of the eggs, which are immediately fertilised, while the bodies of the females fall to the bottom and die. Interesting examples of life-histories, especially of rotifers and of parasitic worms, are given and afford opportunity for reference to parthenogenesis, heterogony and neoteny (as in Caryophyllceus).

    Leçons de zoologie et biologie généale.

    Prof.

    Georges

    Bohn

    Par. (3): Les invertébrés (Coelentérés et vers). (Actualités scientifiques et industrielles, 133.) Pp. 102. (Paris: Hermann et Cie, 1934.) 15 francs.

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    https://doi.org/10.1038/134721c0

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