. Carnegie Institution of Washington publication. . WlPJU, s $*35?•-' • *$s. • *'^ j^yx-^'-: ^' ;;< ^\ 573. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington

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