. Cephalopoda. Cephalopoda. and apparently prepare a combined secretion of the two glands. The func- tion of these is obscure, especially that of the accessory glands. The viscous, sticky secretion of the nidamental glands is apparently difficult to use, while the mucus of the accessory glands may facilitate the formation of the egg membrane as a mechanochemical agent. (But compare also the luminescence of these organs in the chapter on Sepiolidae.) At any rate, the action of the accessory glands is apparently not indispensable, as the Oegopsida lack such glands (floating egg masses), and acce
. Cephalopoda. Cephalopoda. and apparently prepare a combined secretion of the two glands. The func- tion of these is obscure, especially that of the accessory glands. The viscous, sticky secretion of the nidamental glands is apparently difficult to use, while the mucus of the accessory glands may facilitate the formation of the egg membrane as a mechanochemical agent. (But compare also the luminescence of these organs in the chapter on Sepiolidae.) At any rate, the action of the accessory glands is apparently not indispensable, as the Oegopsida lack such glands (floating egg masses), and accessory glands are present only in the Loliginidae and Sepioidea, which attach the eggs. :i25). FIGURE 48. Mantle situs of a young Sepia elegans (6x). The following parts are shown: the anal papilla; behind it laterally the two renal papillae; fur- ther posteriorly the "anlagen" of the ac- cessory nidamental glands with their ra- dial structure in the center of which are the "anlagen" of the glandular tubules; further posteriorly are the small nida- mental glands on either side of the ink sac (Tb) which extends far posteriorly; around the ink sac passes the median pallial artery, which has been cut at the entry into the mantle. To the right and left of this point is the posterior boundary of the mantle cavity, which does not quite reach the posterior end of the body. Also visible are the posterior parts of the funnel retractors, the gills and, behind them, the translucent branchial 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
