A history of British star-fishes, and other animals of the class Echinodermata . k to which he refers. Asteriastenuispina of Lamarck is, I doubt not, a variety of this,with more rays than usual. The Asterias Saveresi ofDelia Chiagi is also a variety; and that author doeswrong to unite Asterias violacea of Muller with the Urasterglacialis. Its rarity is probably owing to its habitat, rocky placesin deep water. The Hebridean locality is an exception;but it is a remarkable fact, one which I have elsewherepressed on the attention of geologists when considering theMollusca, that whenever, as in the
A history of British star-fishes, and other animals of the class Echinodermata . k to which he refers. Asteriastenuispina of Lamarck is, I doubt not, a variety of this,with more rays than usual. The Asterias Saveresi ofDelia Chiagi is also a variety; and that author doeswrong to unite Asterias violacea of Muller with the Urasterglacialis. Its rarity is probably owing to its habitat, rocky placesin deep water. The Hebridean locality is an exception;but it is a remarkable fact, one which I have elsewherepressed on the attention of geologists when considering theMollusca, that whenever, as in the Hebrides, the tides fallbut a few feet, these animals, usually inhabitants of deepwater, may be found living above low water mark. Thisholds good as well in regard to Radiata as to Mollusca;and the mixture of species generally considered inhabitantsof the depths of the sea, with truly littoral species, shoulda fossil bed be formed, might lead to false conclusionsunless such fact be borne in mind. Thus a change in thetides of a line of coast would materially affect its < CROHSFISIT. 83 urasteria:. ? ?? Vt ssaa
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