. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. SYSTEMATIC ACCOUNT 173 Discussion. In Apstein's original description of T. planktonis he particularly noted the absence of a first pair of chaetigers but some later authors (Malaquin and Carin, 1922, and Stop-Bowitz, 1948) have noticed their presence in supposedly young forms. From Apstein's illustration it is clear that his specimen, 5 mm. long for thirteen pairs of parapodia, was not fully developed, the chromophil gland being some distance from the pinnule. It is in fact of that size and stag
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. SYSTEMATIC ACCOUNT 173 Discussion. In Apstein's original description of T. planktonis he particularly noted the absence of a first pair of chaetigers but some later authors (Malaquin and Carin, 1922, and Stop-Bowitz, 1948) have noticed their presence in supposedly young forms. From Apstein's illustration it is clear that his specimen, 5 mm. long for thirteen pairs of parapodia, was not fully developed, the chromophil gland being some distance from the pinnule. It is in fact of that size and stage of development in which one would expect a first pair of chaetigers to be present, if they are present at all. In the present. 0'5 mm 0'5 mm 0-5 m. 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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