. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Heft 1/3 20/1969 Interpretation of Psammornis 297 number MSNG 25 172, and found it sufficiently well preserved to identify and measure surface structures (Fig. 6). Its edges and surfaces are sand- worn, the outer surface more than the mammillary side. Wear and erosion of the pore canals on the outside of the shell have reached rather deeply into the spongy layer giving it a pockmarked appearance. The fragment is superficially stained a brownish sand-color; inside it
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Heft 1/3 20/1969 Interpretation of Psammornis 297 number MSNG 25 172, and found it sufficiently well preserved to identify and measure surface structures (Fig. 6). Its edges and surfaces are sand- worn, the outer surface more than the mammillary side. Wear and erosion of the pore canals on the outside of the shell have reached rather deeply into the spongy layer giving it a pockmarked appearance. The fragment is superficially stained a brownish sand-color; inside it is still white as shown by the relatively fresh break along one of the edges. The outer surface shows numerous very fine pores of circular shape; a number of canals are opened up through wear and erosion. The pores are neither grooved nor fused but rather isolated, solitary and arranged in small groups. Their distribution is mostly irregular, but here and there they are lined up in short rows (Fig. 6). Erosion has altered the surface pattern. For a full understanding of the remaining canal system thin sections must be made from the fragment. Less eroded and worn areas reveal that the shell in its original state was probably. Fig. 4. P. rothschildi, B. M.( A 1334, tangential section through the mammillary layer; a) arrangement of mammillary cores, b) enlarged section showing wedges of the granular organic 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 Zoologisches Forschungsinstitut und Museum Alexander Koenig. Bonn : Das Forschungsinstitut
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Keywords: ., bookcentury1900, bookcoll, booksubjectbiology, booksubjectzoology
