. Bulletin - United States National Museum. Science. Fig. 32.—Anolotichlv impolita. a and b, surface of a well-pseserved example, x9, and X18; c, SMALL PORTION OF A TANGENTIAL SECTION, X18, SHOWING LUNAELA AND TUBULI; d, VERTICAL SECTION, X9. STICTOPORELLA BED OF BLACK RiVER (DeCORAH) SHALES, ST. PAUL, MINNESOTA. (AFTER ULRICH.) third, a less polygonally outlined zooecium. However, as all of these specimens have a very narrow, mature region, and the zoarium itself is small, there is little doubt that they are only young stages of a species growing into more robust branches. Almost all of the A
. Bulletin - United States National Museum. Science. Fig. 32.—Anolotichlv impolita. a and b, surface of a well-pseserved example, x9, and X18; c, SMALL PORTION OF A TANGENTIAL SECTION, X18, SHOWING LUNAELA AND TUBULI; d, VERTICAL SECTION, X9. STICTOPORELLA BED OF BLACK RiVER (DeCORAH) SHALES, ST. PAUL, MINNESOTA. (AFTER ULRICH.) third, a less polygonally outlined zooecium. However, as all of these specimens have a very narrow, mature region, and the zoarium itself is small, there is little doubt that they are only young stages of a species growing into more robust branches. Almost all of the American specimens of AnoloticJiia impolita are of heavy, full-grown zoaria, but a few examples before me show the j^outhful condition. After carefully comparing these and the Russian specimens, I am convinced that more mature fragments of the latter could not be distinguished even as a variety from the American species. Both the American and Russian examples are illustrated here, and comparisons of figures 32 and 33 will show their identity of structure, Ulrich's description of the species is as follows: Zoarium large, bushy, consisting of abundantly and irregularly divided solid branches, the latter varying from 5 to over 20 mm. in diameter. At the base the branches may coalesce, and here they are always stronger than at their terminations. Rarely the zoarium is not branched, but occurs as an irregular mass with lobe-like. 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.
Size: 1356px × 1843px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
