. The Cephalopoda. Cephalopoda. Myopsida: Spirulidae. FIGURE 38 chamber, and a siphuncle which extends ventrally from the living chamber. The shell sac is well developed as an independent formation in all the sites in which it does not border on the mantle; but it is fused with the mantle on its entire dorsal surface, from the penultimate chamber to the ventrally situated 20th chamber, so that at these sites it does not constitute an independent formation. This applies es- pecially to the dorsal oval, the terminal disc and the ventral oval. The first 10 chambers formed curve into a po
. The Cephalopoda. Cephalopoda. Myopsida: Spirulidae. FIGURE 38 chamber, and a siphuncle which extends ventrally from the living chamber. The shell sac is well developed as an independent formation in all the sites in which it does not border on the mantle; but it is fused with the mantle on its entire dorsal surface, from the penultimate chamber to the ventrally situated 20th chamber, so that at these sites it does not constitute an independent formation. This applies es- pecially to the dorsal oval, the terminal disc and the ventral oval. The first 10 chambers formed curve into a post horn, so that they approach the adjacent older chambers or volutions of the shell. This results in a fusion of the adjacent dorsal and ventral surfaces 333. 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 Chun, Carl. Jerusalem : Israel Program for Scientific Translations ; Springfield, Va. : available from the U. S. National Technical Information Service
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectcephalopoda
