. Bulletin. Natural history; Natuurlijke historie. SUPERFAMILY BELLEROPHONTOIDEA 105 percarinatus. No structure was seen in the thin outer shell layer and the thick inductura at the inner lip. At the part of the shell where the cones are exposed, the inner shell layer is mm thick and the outer layer is mm thick. Although the remaining 18 shells were more recrystallized than the two just described, several of them showed, on the surface immediately under the outer shell layer, an irregularly polygonal pattern reflecting the presence of major prisms. It should be mentioned, as a general
. Bulletin. Natural history; Natuurlijke historie. SUPERFAMILY BELLEROPHONTOIDEA 105 percarinatus. No structure was seen in the thin outer shell layer and the thick inductura at the inner lip. At the part of the shell where the cones are exposed, the inner shell layer is mm thick and the outer layer is mm thick. Although the remaining 18 shells were more recrystallized than the two just described, several of them showed, on the surface immediately under the outer shell layer, an irregularly polygonal pattern reflecting the presence of major prisms. It should be mentioned, as a general conclusion, that a polygonal or honey- comb pattern on the surface of a shell layer does not necessarily indicate that. 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 Peabody Museum of Natural History. New Haven : The Museum
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Keywords: ., bookcentury1900, bookcollectionbiodiv, booksubjectnaturalhistory
