. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Xylophagainae • Turner 271. Plate 2. Xylophaga gerda Turner n. sp. from Gerda, station 499. Figure 1. Lateral view of holotype showing the attachment of the posterior adductor muscle through the thin valve, the mesoplax that does not extend above the umbos, and the fecal cylinder in the excurrent canal. Figure 2. Dorsal view of the holotype showing the mesoplax. Figure 3. Enlargement of the posterior end of the siphons. Figure 4. Diagrammatic cross-section through the siphons and the fecal cylinder. Figure 5. Three-qu
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Xylophagainae • Turner 271. Plate 2. Xylophaga gerda Turner n. sp. from Gerda, station 499. Figure 1. Lateral view of holotype showing the attachment of the posterior adductor muscle through the thin valve, the mesoplax that does not extend above the umbos, and the fecal cylinder in the excurrent canal. Figure 2. Dorsal view of the holotype showing the mesoplax. Figure 3. Enlargement of the posterior end of the siphons. Figure 4. Diagrammatic cross-section through the siphons and the fecal cylinder. Figure 5. Three-quarter view of holotype showing the inflated umbos and the simple curved plates of the mesoplax. Figure 6. A relatively smooth chimney composed largely of periostracum, with a thin coating of fecal material. Figure 7. A thick chimney, built in sections with "leaves" of periostracum extending at the anterior end of each 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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