. Bulletin - United States National Museum. Science. Fig. 107.—Mesotrypa egena. a, side view of type-specimen, natukal size; l, tangential section THROUGH THE MATURE ZONE, X20; C AND d, PORTIONS OF THE SAME, X35, SHOWING WALL STRUCTURE AND VARIATIONS IN NUMBER OF ACANTHOPORES; 6 AND /, TWO PORTIONS OF A VERTICAL SECTION, X20. Kegel beds (D2), Habbinem, Esthonia. on account of the presence of small acanthopores and the numerous curved diaphragms. The acanthopores are much stronger and the diaphragms more curved in M. injida, but certain portions of its zoarium sometimes exhibit a structure rese
. Bulletin - United States National Museum. Science. Fig. 107.—Mesotrypa egena. a, side view of type-specimen, natukal size; l, tangential section THROUGH THE MATURE ZONE, X20; C AND d, PORTIONS OF THE SAME, X35, SHOWING WALL STRUCTURE AND VARIATIONS IN NUMBER OF ACANTHOPORES; 6 AND /, TWO PORTIONS OF A VERTICAL SECTION, X20. Kegel beds (D2), Habbinem, Esthonia. on account of the presence of small acanthopores and the numerous curved diaphragms. The acanthopores are much stronger and the diaphragms more curved in M. injida, but certain portions of its zoarium sometimes exhibit a structure resembling that in M. egeTia. Indeed, the latter may represent merely a poorly developed stage of M. injida. Occurrence.—Rare in the Kegel limestone (D2) at Habbmem, Esthonia. Hohtype.—Cat. No. 57283, Two thin sections of the type-specimen are in the British Museum 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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