. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. LARVAE OF DECAPOD CRUSTACEA 419 The growth factor remains about 1-3 or less, and one cannot therefore assume a greater rate of growth for earher stages. If that is so we are forced to conclude that there are as many as thirteen stages, and that Gilchrist's larva of 3-8 mm. is stage 4. Bouvier and Santucci agree in finding nine stages in Palinurus vulgaris, and Stephensen found the same number in Scyllarm arctus. Gilchrist's larva is even less developed than stage II of Palimirus, and it is diffi
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. LARVAE OF DECAPOD CRUSTACEA 419 The growth factor remains about 1-3 or less, and one cannot therefore assume a greater rate of growth for earher stages. If that is so we are forced to conclude that there are as many as thirteen stages, and that Gilchrist's larva of 3-8 mm. is stage 4. Bouvier and Santucci agree in finding nine stages in Palinurus vulgaris, and Stephensen found the same number in Scyllarm arctus. Gilchrist's larva is even less developed than stage II of Palimirus, and it is difficult to believe that it can represent a later stage. In any case. Fig. 26. PamiUnis D, 8 mm. St. 407. there seems to be a gap of three unknown stages between this larva of 3-8 mm. and the youngest of the Discovery specimens. Our knowledge of the development of the European forms is not so securely founded that we are entitled to assume a similar course in other genera and species, and having regard to the wide distribution and great size reached by some of them, there may well be a longer period of larval life and a greater number of stages. Consequently I have, for the purposes of this report, accepted a provisional arrangement into thirteen stages, 6-2. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Institute of Oceanographic Sciences (Great Britain); National Institute of Oceanography of Great Britain; Great Britain. Colonial Office. Discovery Committee. London ; New York : Cambridge University Press
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