. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 178 G. R. MURDOCK AND J. D. CURREY. FIGURE 11. Inner surface of the radius on the carinolateral plate of S. balanoides. Com- pare its even edge (arrow) with the corresponding structure in B. balanus (Fig. 7). FIGURE 12. Margin of the paries on the carinal plate of J?. balanoides where the edge of the radius of the carinolateral butts against it. Contact begins along the line indicated by the arrows and extends as a snug abutment for a short distance only in the direction of the tails of the arrows. The region figured is a li
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 178 G. R. MURDOCK AND J. D. CURREY. FIGURE 11. Inner surface of the radius on the carinolateral plate of S. balanoides. Com- pare its even edge (arrow) with the corresponding structure in B. balanus (Fig. 7). FIGURE 12. Margin of the paries on the carinal plate of J?. balanoides where the edge of the radius of the carinolateral butts against it. Contact begins along the line indicated by the arrows and extends as a snug abutment for a short distance only in the direction of the tails of the arrows. The region figured is a little below section A in Figure 23. A and B indicate the apical and basal ends of the structure, respectively. FIGURE 13. Groove in the sheath region of the carinolateral plate of S. balanoides. The shallow pits receive the teeth on the rostral margin of the ala of the carina. FIGURE 14. The roughly toothed rostral margin of the ala on the carina of 5". balanoides. outside the base of the ala. (Snug is defined here as the condition in which the two plates fit tightly up against each other, with the interposition of only a very thin layer of organic material, a few microns thick; Fig. 6.) The inner surface along the radius is ridged (Figs. 7, 15), the ridges projecting somewhat beyond the end as teeth. These ridges are probably basically the same as those figured by Darwin (1854) for B. tintinnaludnin \Mcgabalanus tintininiJuilmn (Newman and Ross, 1976)] and strikingly similar (especially in Darwin's figures) to the teeth at the base of the paries which give rise to the so-called interlaminate figures (Newman, Zullo and Wainright, 1967). These ridges fit into shallow pits in the bottom of the groove on the paries, which groove receives the edge of the radius (Figs. 8, 16). The tips of the ridges often have a chalky white appearance. The radius. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorat
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
