. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. B. •CG Figure 5. (A) Schematic diagram of the lips, labial palps, and anterior portion of the gills of ("rassostrea Yirginica (redrawn after Galtsoff, 1964). The oral hood of the mantle is cut away to reveal the buccal region section shown in B. (B) An enlargement of the mid-longitudinal section of the buccal region. PreniiiiR-nt cilia on the inner lip ridge and outer lip tract beat orally (open arrows), and aid in the transport of particles into the mouth (solid arrows). Buccal region is shown before insertion of the i
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. B. •CG Figure 5. (A) Schematic diagram of the lips, labial palps, and anterior portion of the gills of ("rassostrea Yirginica (redrawn after Galtsoff, 1964). The oral hood of the mantle is cut away to reveal the buccal region section shown in B. (B) An enlargement of the mid-longitudinal section of the buccal region. PreniiiiR-nt cilia on the inner lip ridge and outer lip tract beat orally (open arrows), and aid in the transport of particles into the mouth (solid arrows). Buccal region is shown before insertion of the inner lip ndge into the outer lip (dashed arrow indicates inner lip move- ment). Outer lip is shown with ciliated gutter formed which coincides with active feeding. (Ant = anterior. CG = ciliated gutter. G = gills. iL = inner lip. iLR = inner lip ridge, oL = outer lip, M = mantle. Mo = mouth. iPL = inner palp lamella, oPL = outer palp lamella. Post = posterior). son, 1960; Galtsoff, 1964; Ribelin and Collier, 1977). Once in the plical troughs, participate matter was directed bas- ally, at a mean velocity of 740 ± 250jum-s~', towards the ciliated tracts that lie at the base of the gills (Table I; Fig. 6). Particles in the troughs appeared to be transported in suspension, but the high variation in particle velocity (Table I) suggests that some particles may have been car- ried directly on the frontal cilia of the surrounding tran- sitional filaments. Particles were also captured on the frontal surface of the ordinary filaments. The ordinary filaments form the sides and tops of the plicae, from the transitional filament on one side, to the transitional filament on the other, an area we term the plical "; Capture of particles by the ordinary filaments was not always instantaneous. Par- ticles were often observed being deflected away from the frontal surface of one filament, only to accelerate towards the frontal surface of the same or an adjacent filament. These p
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
