. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. D E Fig. 6. Selected types of graptoloid thecae. A, leptograptid; B, dicello- graptid (simple); C, dicellograptid and dicranograptid (more complex); D, E, extreme types of monograptid (triangulate and lobate). Growth-lines, mainly conjectural, inserted for greater 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

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. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. D E Fig. 6. Selected types of graptoloid thecae. A, leptograptid; B, dicello- graptid (simple); C, dicellograptid and dicranograptid (more complex); D, E, extreme types of monograptid (triangulate and lobate). Growth-lines, mainly conjectural, inserted for greater 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