. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 160 THREE CRUISES OF THE " BLAKE. Norway, Bear Island, and Spitzbergen, Biloculina ringens forms the most important organic constituent of the bottom deposits, and Pourtales and Sars have named this the Biloculina clay ; but this term is hardly to be understood in the same sense in which we speak of globigerina ooze, the Biloculinse formino- but a very small proportion of the ooze deposit. (Fig. 485.). Fig-. 485. — Biloculina tenera. With expanded pseudopodia. ¥• (Schultze.) Orbiculina adunca (Fig. 486)

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. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 160 THREE CRUISES OF THE " BLAKE. Norway, Bear Island, and Spitzbergen, Biloculina ringens forms the most important organic constituent of the bottom deposits, and Pourtales and Sars have named this the Biloculina clay ; but this term is hardly to be understood in the same sense in which we speak of globigerina ooze, the Biloculinse formino- but a very small proportion of the ooze deposit. (Fig. 485.). Fig-. 485. — Biloculina tenera. With expanded pseudopodia. ¥• (Schultze.) Orbiculina adunca (Fig. 486) is a very common deep-water form : it attains a diameter of 6 mm. In both Orbiculina and. 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: ., bookauthorha, bookcentury1800, bookdecade1860, booksubjectzoology