. Annotationes zoologicae japonenses / Nihon do?butsugaku iho?. NOTES ON COELOPLANA BOCKI n. sp. 5*3 takes to swimming much less frequently than before, but remains most of the time on the bottom, where it begins to creep about, using the above indicated pharyngeal surface as the sole. In still four or five hours, most of the cilia of comb-plates become either bent or broken off in the middle, and finally fall away altogether. The larva is then entirely incapable of swimming, and the creeping by means of the sole becomes the only way of locomotion. The pigments increase in the parenchyme ; the
. Annotationes zoologicae japonenses / Nihon do?butsugaku iho?. NOTES ON COELOPLANA BOCKI n. sp. 5*3 takes to swimming much less frequently than before, but remains most of the time on the bottom, where it begins to creep about, using the above indicated pharyngeal surface as the sole. In still four or five hours, most of the cilia of comb-plates become either bent or broken off in the middle, and finally fall away altogether. The larva is then entirely incapable of swimming, and the creeping by means of the sole becomes the only way of locomotion. The pigments increase in the parenchyme ; the tentacle-stem develops some ten branches ; the sole flatly spreads out all around, while the inner end of the pharynx develops a few folds on the wall (" pharyngeal folds "). Fig 5. Fig. 5. A larva during metamorphosis, adhering to the substratum by the thinly spread-out sole. The main body laid back and seen on the transverse plane. x 170. Pharyngeal folds. Other letterings as in Fig. 4. After two or three hours more, the adherent larva is at an advanced stige of metamorphosis. By that time the combs have completely fallen off, and the sole has extensively enlarged in all directions, flattening. 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 Nihon Do?butsu Gakkai; To?kyo? Do?butsu Gakkai. Tokyo : Societas
Size: 1744px × 1432px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookcollectionbiod, bookdecade1890, bookyear1897
