. Bulletin - United States National Museum. Science. FiG. 68.—Pachtdictta BirxrRCATA. a to g, Wiman's figttees of Rhikidictya boekholmiensis. a TO d, FOUE FEAGMENTS, NATUEAL SIZE; e, SUEFACE OF FEAGMENT, XIO;/, VEETICAL SECTION, XIO; g, TEANSVEESE SECTION, XlO. BOEKHOLM DEIFT, "OjLE MyE, ISLAND OF GOTHLAND; ft TO J, EICHWALD'S FIGUEES OF STICTOPOEA SCALPELLUM; Jl, FEAGMENT, NATUEAL SIZE; i, SUEFACE ENLAEGED; j, END VIEW OF SAME. BOEKHOLM LIMESTONE, ISLAND OF DaGO. ing dichotomously at rather long intervals; second, by its large, oval, thick-walled zooecia, of which there are four to four
. Bulletin - United States National Museum. Science. FiG. 68.—Pachtdictta BirxrRCATA. a to g, Wiman's figttees of Rhikidictya boekholmiensis. a TO d, FOUE FEAGMENTS, NATUEAL SIZE; e, SUEFACE OF FEAGMENT, XIO;/, VEETICAL SECTION, XIO; g, TEANSVEESE SECTION, XlO. BOEKHOLM DEIFT, "OjLE MyE, ISLAND OF GOTHLAND; ft TO J, EICHWALD'S FIGUEES OF STICTOPOEA SCALPELLUM; Jl, FEAGMENT, NATUEAL SIZE; i, SUEFACE ENLAEGED; j, END VIEW OF SAME. BOEKHOLM LIMESTONE, ISLAND OF DaGO. ing dichotomously at rather long intervals; second, by its large, oval, thick-walled zooecia, of which there are four to four and one-half in 2 mm., measuring longitudinally; and third, by the broad, granulose interspaces separating the apertures at both their ends and sides. P. cyclostomoides has still larger zooecia and differs further in its broader, more frequently branching zoarium. The othep species have smaller zooecia and a different surface ornament. RTiinidictya ? horJcTiolmiensis Wiman is in all probabiHty a synonym of the present form. This species is recorded by Wiman as a very common fossil of the drift bowlders at Ojle Myr, on the island of Gothland, and in the Borkholm hmestone at Borkholm, 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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