. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LARVAL SHLLL MUSCLLS IN ABALONE 39. 17 Figure 16. Transverse section of lana at 4 days alter hatching, showing the enlarged mantle cavity (MC): boxed area is shown in Fig. 17. MF = mantle fold: VL = visceral lobe. Orientation axes: D = dorsal; V = ventral: L = left; R = right. Scale. 50 pm. Figure 17. Transmission electron micrograph (TEM) of boxed area in Fig. 16 (cut from different larva), showing the main body of the LRM and its mantle branch (slender arrows). The left pedal muscle (stout arrow) extends along the left sid
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LARVAL SHLLL MUSCLLS IN ABALONE 39. 17 Figure 16. Transverse section of lana at 4 days alter hatching, showing the enlarged mantle cavity (MC): boxed area is shown in Fig. 17. MF = mantle fold: VL = visceral lobe. Orientation axes: D = dorsal; V = ventral: L = left; R = right. Scale. 50 pm. Figure 17. Transmission electron micrograph (TEM) of boxed area in Fig. 16 (cut from different larva), showing the main body of the LRM and its mantle branch (slender arrows). The left pedal muscle (stout arrow) extends along the left side of the LRM and has a denser myoplasm than the LRM. Scale. 10 /jm. gressively older larval stages suggest that the pedal myo- blasts give rise to intrinsic pedal muscles and possibly to two shell-attached pedal muscles, which I call the left pedal muscle and the medial pedal muscle. The arrangement of myonlaments within the two pedal muscles is similar, but is different from that found for the LRM and ACC. Pedal muscles have much longer thick filaments and do not show obvious striations (Figs. 18-20). The two pedal muscles have different shell-attachment sites and trajectories. The left pedal muscle is attached to the posterior area of the left side of the protoconch, and its trunk travels anteriorly along the ventro-lateral left side of the LRM (Fig. 17). Before entering the foot, the. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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