. Bulletin - United States National Museum. Science. Fig. 160.—Teematopoea ctstata. a and h, two feagments, natxjeal size; c, tangentul section, x20, showing oval zocecia, distinct peeistomes and small acanthopoees; d, seveeal zocecia, x40; e, veetical section of a beanch, showing the usual appearance, x20. kuckees shale (02), Reval, Esthonia. The zoa,rium is of small, cylindrical stems, 2 to 3 mm. in diameter, which branch frequently and irregularly. The surface is smooth, but has distinct maculae of larger zooecia and wider interspaces, as shown in figure 25 of plate 11. Acanthopores are rat
. Bulletin - United States National Museum. Science. Fig. 160.—Teematopoea ctstata. a and h, two feagments, natxjeal size; c, tangentul section, x20, showing oval zocecia, distinct peeistomes and small acanthopoees; d, seveeal zocecia, x40; e, veetical section of a beanch, showing the usual appearance, x20. kuckees shale (02), Reval, Esthonia. The zoa,rium is of small, cylindrical stems, 2 to 3 mm. in diameter, which branch frequently and irregularly. The surface is smooth, but has distinct maculae of larger zooecia and wider interspaces, as shown in figure 25 of plate 11. Acanthopores are rather numerous, although not as abundant as in Trematopora primigenia. Vertical sections show the most decided features of internal structure, the presence of abundant cyst-hke structures filling the mesopores. Near the sur- face these are obscured or replaced by a dense, laminated tissue. Six to seven zooecia occur in 2 mm. Trematopora cijstata is closely related to T. primigenia, but differs in having large zooecia, less abundant acanthopores, and especially in the numerous crov/ded, cyst-like diaphragms filling the mesopores. Trematopora IcucJcersiana has larger zooecia, fewer acanthopores, and a more robust 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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