. Bulletin - United States National Museum. Science. Fig. 94.—Monticulipoea dagoensis. a, tangential section, X20, illusteating the distinct acan- THOPOEES AND OTHEE EEATUEES OP THE SPECIES; 6, POETION OF SAME, X35, SHOWING IN ADDITION THE GEANTJLOSE WALL STEUCTUEE; C, VEETICAL SECTION, X20, THEOUGH THE MATUEE EEGION OF THE ZOA- EIUM, EXHIBITING CLOSELY TABULATED MESOPOEES AND ZOCECIA WITH A DOXJBLE EOW OF CYSTIPHBAGMS. LTCKHOLM LIMESTONE (Fl), KEETEL, ISLAND OF DAGO. mesopores are unusually large, sometimes almost equaling the zocBcia from which they can always be distinguished by their lack
. Bulletin - United States National Museum. Science. Fig. 94.—Monticulipoea dagoensis. a, tangential section, X20, illusteating the distinct acan- THOPOEES AND OTHEE EEATUEES OP THE SPECIES; 6, POETION OF SAME, X35, SHOWING IN ADDITION THE GEANTJLOSE WALL STEUCTUEE; C, VEETICAL SECTION, X20, THEOUGH THE MATUEE EEGION OF THE ZOA- EIUM, EXHIBITING CLOSELY TABULATED MESOPOEES AND ZOCECIA WITH A DOXJBLE EOW OF CYSTIPHBAGMS. LTCKHOLM LIMESTONE (Fl), KEETEL, ISLAND OF DAGO. mesopores are unusually large, sometimes almost equaling the zocBcia from which they can always be distinguished by their lack of cystiphragms. In addition to the structure described, a tangential section brings out the peculiar granulose wall structure characteristic of the genus. The incrusting growth, small, angular, thin-walled zocecia, large, numerous mesopores and well marked acanthopores, are characters of the present species which wUl separate it from all described forms of the genus. Occurrence.—Rare in the Lyckholm limestone (Fl) at Kertel, island of Dago, Baltic Sea. Holotype.—C&t. No. 57270, British Museum, thin section of the type-specimen. Genus ORBIGNYELLA Ulrieh and Bassler. Orhignyella Ulrich and Bassler, Smitlis. Misc. Coll., vol. 47, 1904, p. 18.— Bassler, Bull. 292, U. S. Geol. Surv., 1906, p. 26. This genus was proposed for Monticuliporidse which differ from Monticulipora in wanting its irregularly granulose wall structure,. 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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