. Bulletin - United States National Museum. Science. Fig. 208.—Hallopoka undulata. a and b, typical specimens op the natural size; c, surface of OKIGINAL OF FIGUEE 6, X9; d, VERTICAL SECTION, X18. BLACK ElVEE (DeCOEAH) SHALES, ST. PAUL, Minnesota. (After Ulrich.) Russian examples referred to the species differ only in having a slightly less robust zoarium, a difference which would undoubtedly be eliminated with larger collections. Ulrich's description is quoted below: Zoarium ramose, branches slender, averaging about or 3 mm. in diameter, divid- ing dichotomously at intervals of 10 mm. or
. Bulletin - United States National Museum. Science. Fig. 208.—Hallopoka undulata. a and b, typical specimens op the natural size; c, surface of OKIGINAL OF FIGUEE 6, X9; d, VERTICAL SECTION, X18. BLACK ElVEE (DeCOEAH) SHALES, ST. PAUL, Minnesota. (After Ulrich.) Russian examples referred to the species differ only in having a slightly less robust zoarium, a difference which would undoubtedly be eliminated with larger collections. Ulrich's description is quoted below: Zoarium ramose, branches slender, averaging about or 3 mm. in diameter, divid- ing dichotomously at intervals of 10 mm. or more. Surface with rather large, rounded monticules, that usually coalesce laterally, forming transverse ridges, or more or less complete annulations, 5 in 10 mm. In some fragments and portions of others the. 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
