. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. WHITTINGTOX : SILICIFIED ODOXTOPLEURIDAE 259 (sag.) a little more than one-third width at anterior margin. Axis moderately convex, a little wider than long, rounded pos- teriorly, rising from the flat pleural regions and not defined by deep furrows. Articulating furrow and half-ring like those of segments. First ring furrow broad and deep, curving forward to midline, extremities widened and deepened. Second ring. Figure 21. Triangular graph comparing relative proportions of dimensions of cranidia of Apianttrus barhatu
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. WHITTINGTOX : SILICIFIED ODOXTOPLEURIDAE 259 (sag.) a little more than one-third width at anterior margin. Axis moderately convex, a little wider than long, rounded pos- teriorly, rising from the flat pleural regions and not defined by deep furrows. Articulating furrow and half-ring like those of segments. First ring furrow broad and deep, curving forward to midline, extremities widened and deepened. Second ring. Figure 21. Triangular graph comparing relative proportions of dimensions of cranidia of Apianttrus barhatus , Those from the lower Edin- luirg formation, localities :!, 3, sliown in dots enclosed by solid line. Cranidia from the Oranda formation, locality 8, shown by open circles enclosed by broken line. Two tiny cranidia from locality 3 shown by X (originals of Piate 19. figures 2, 9). L, sagittal length of cranidium. "W, width between spines B on posterior border. E. length (exs.) from anterior margin to midpoint of palpebral lobe. Measurements were made in ex- terior view, with isolated cranidium resting on a horizontal 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
