. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 4i8 DISCOVERY REPORTS It is a matter of great difficulty to determine how many stages there may be in the development oi Josus, since apart from stage I Gilchrist obtained only a single specimen (of 3-8 mm.) of another early stage. Von Bonde (1932) did not add to our knowledge of this species. The Discovery material consists of about fifty specimens all much older than this specimen of Gilchrist's. Taking as a basis specimens of four distinguishable stages from St. 85, it is found that these inc
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 4i8 DISCOVERY REPORTS It is a matter of great difficulty to determine how many stages there may be in the development oi Josus, since apart from stage I Gilchrist obtained only a single specimen (of 3-8 mm.) of another early stage. Von Bonde (1932) did not add to our knowledge of this species. The Discovery material consists of about fifty specimens all much older than this specimen of Gilchrist's. Taking as a basis specimens of four distinguishable stages from St. 85, it is found that these increase in size by a growth factor of about 1-3,. Fig. 25. Panulivus D, 57 mm. St. 1554. whether total length is taken or pre- or. post-labral length, showing that in these parti- cular stages (from 10-4 to 2275 mm.) irrere is no appreciable differential rate of growth. The fifty specimens measured fall into six groups of which the average sizes are: Average size (mm.) Growth factor 10-5 — 13-57 1-29 i6-5 1-22 20-8 1-26 28-6 1-36 35-0 1-23. 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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