. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 304 DISCOVERY REPORTS an extreme form of this chitinoid development (Fig. 25 d, e). Despite the great dif- ference between forms such as those shown in Figs. 25 a, b and 25 d, e, there is every reason to suppose that the one may develop from the other and that they are conspecific. Further, it is almost certain that the tangential skeleton of styli, the irregularity of the tornota, etc., are correlated with the development of the chitinoid ectosome and may. Fig. 25. a-e, Tedania massa, Ridley an
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 304 DISCOVERY REPORTS an extreme form of this chitinoid development (Fig. 25 d, e). Despite the great dif- ference between forms such as those shown in Figs. 25 a, b and 25 d, e, there is every reason to suppose that the one may develop from the other and that they are conspecific. Further, it is almost certain that the tangential skeleton of styli, the irregularity of the tornota, etc., are correlated with the development of the chitinoid ectosome and may. Fig. 25. a-e, Tedania massa, Ridley and Dendy, showing some of the variations in external form; /, Tedania tenuicapitata, Ridley, showing similarity of form due to the growth of an encrusting Haliclona around the basal half. possibly be induced by it. What gives rise to this ectosome is, however, still a mystery; but it is interesting to note that in some of the more typical individuals of T. massa irregularly rounded patches of such an ectosome occasionally occur and that their presence is always accompanied by some derangement of the outer layers of the skeleton, although a tangential layer of styli may not have been formed. This cuticle is so con-. 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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