Abstract
THE year 1891 will remain memorable to echinologists for the richness of its products upon the morphology of the class with which they deal, not the least brilliant and far-reaching of which is the discovery by Brooks and Field of the primary bilateral symmetry of the water-vascular system of Asterias; but the following year will not pale beside it, if only on account of the magnificent treatise to which we now call attention. The amount of solid work which the author has compressed into his fifty-seven pages is little short of astonishing. The monograph is written in excellent English, and illustrated by nine plates well worthy of the text; and from whatever standpoint it is judged, a verdict of unstinted praise must be given.
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References
A Monograph, by Prof. Hjalmar Théel, Nova Acta Reg. Soc. Sci. (Upsala: Ser. iii. pp. 1–57. 1892.)
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The Development of Echinocyamus Pusillus1. Nature 48, 330 (1893). https://doi.org/10.1038/048330a0
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DOI: https://doi.org/10.1038/048330a0