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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt:...above (p. 297), only a few of these survived. Sayartia troylxlytts, in these aquaria at any rate, apparently takes three years to reach maturity. In the early part of 1904 the aquaria were somewhat neglected, the water was aerated less frequently and not changed for over three months, and the animals remained unfed for a longer period than usuaL Probably as a result of these less favourable conditions only a few young, much fewer than usual, were produced, even by the younger specimens of sajartia: these younger ones were abnormally thin and transparent, and were uot extruded until early in April The sixteen original specimens produced no offspring whatever in the spring of this year (,19'4. Specimens of Actinia mesembryanthemum living under identical conditions and in the same aquaria as the Sagartia were more fruitful, two in particular being very prolific, though their breeding season was somewhat retarded. It would therefore appear that S. troglodytes is more sensitive than A. mesembryanthemum to changes in the environment, and that these changes exert a considerable effect on the reproduction, though it is obvious that there is some individual variation in this respect. In August 1903 two specimens of S. troglodytes were brought from Thorshavn in the Faeroes and placed in the aquaria. In the following October each produced several young, and in April 1904 one of them gave birth to a single young anemone. All the other specimens of S. troglodytes which were under the same conditions breed only in the spring, and it is improbable that October is the normal breeding-time of specimens under natural conditions in the Faeroes, as by this late season of the year the sea is already running high, and there would be a great risk of the delicate young anemones be...