. Cephalopoda. Cephalopoda. FIGURE 18. Transition of straight Nautiloidea into the typical Nautilus form and reconstruction of the former from relationships in the latter. Four diagrammatic figures of young forms: a — Orthoc eras-stage; b — Cyrtoceras stage; c — Gyroceras stage; d — Nautilus stage. The figure illustrates the modification of the soft body as a result of the coiling; these changes disappear gradually in the early stages. Instead of vesicular initial chambers, those in stages b and c must have been flat and bowl-shaped (pp. 57,58). 70. Please note that these images are extracted
. Cephalopoda. Cephalopoda. FIGURE 18. Transition of straight Nautiloidea into the typical Nautilus form and reconstruction of the former from relationships in the latter. Four diagrammatic figures of young forms: a — Orthoc eras-stage; b — Cyrtoceras stage; c — Gyroceras stage; d — Nautilus stage. The figure illustrates the modification of the soft body as a result of the coiling; these changes disappear gradually in the early stages. Instead of vesicular initial chambers, those in stages b and c must have been flat and bowl-shaped (pp. 57,58). 70. 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 Naef, Adolf. Jerusalem : Israel Program for Scientific Translations
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectcephalopoda
