. Annotationes zoologicae japonenses / Nihon do?butsugaku iho?. 582 TAKU KOMAI : remarkably in the transverse direction, while the inner half of pharynx {pk') has done so in the sagittal direction. Yellowish and brownish pigment spots (pg) have appeared in the neighbourhood of the mouth, the sensory capsule and the tentacular apparatus. Besides, a quantity of dark spots now exists in the deeper tissues of the entire body, which fact makes difficult the inspection of the inner organization. Fig 4. Fig. 4. The cydippid larva, ready to hitch out, seen on the transverse plane, x 170. o. Mouth aper
. Annotationes zoologicae japonenses / Nihon do?butsugaku iho?. 582 TAKU KOMAI : remarkably in the transverse direction, while the inner half of pharynx {pk') has done so in the sagittal direction. Yellowish and brownish pigment spots (pg) have appeared in the neighbourhood of the mouth, the sensory capsule and the tentacular apparatus. Besides, a quantity of dark spots now exists in the deeper tissues of the entire body, which fact makes difficult the inspection of the inner organization. Fig 4. Fig. 4. The cydippid larva, ready to hitch out, seen on the transverse plane, x 170. o. Mouth aperture. pg- Pigment spots. 4pp. Polar plates. J. Aboral sense-organ. /. Tentacle-stem. Tentacle-sheath. a. Oesophagus. fW. Inner part of pharynx. Fig. 4 represents the fully developed cydippid larva ready to hatch out. Such a larva is frequently observed to do stretching movements in the egg membrane and to press the mouth region against the latter as if in attempts to free itself. Eventually, the membrane ruptures and the larva escapes. For a short while after hatching in a vessel, the larva swims about very actively by means of the combs, sinking now and then to the bottom and adhering there by the inner surface of the inferior part of pharynx, which surface is turned outwards by excessively widely opening the mouth. Four or five hours* after hatching, the larva * The time required for the development varies considerably with 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: 1739px × 1437px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookcollectionbiod, bookdecade1890, bookyear1897
