. Ordovician fossils of north China. Paleontology; Paleontology. (in) 12 Palxontologia Sinica Ser. B. Measurements: Greatest width = 13 mm Hinge line =10 ,, Height = 9 ,, Proportion of height to width = A second exterior impression of a Brachial valve (Ser. No. X 216 PI. I, Fig. 8a) is of a smaller specimen as compared with No. X 218. Its measurements are as follows: Greatest width — 8 mm Hinge line =7 ,, Height =5 ,, Proportion of height to width = The sinal depression is very clear and the arrangement of the sinal plica- tions is shown in Text-Figure Text-Fig. 2. Arrangement of
. Ordovician fossils of north China. Paleontology; Paleontology. (in) 12 Palxontologia Sinica Ser. B. Measurements: Greatest width = 13 mm Hinge line =10 ,, Height = 9 ,, Proportion of height to width = A second exterior impression of a Brachial valve (Ser. No. X 216 PI. I, Fig. 8a) is of a smaller specimen as compared with No. X 218. Its measurements are as follows: Greatest width — 8 mm Hinge line =7 ,, Height =5 ,, Proportion of height to width = The sinal depression is very clear and the arrangement of the sinal plica- tions is shown in Text-Figure Text-Fig. 2. Arrangement of the sinal plications in specimen No. X 216. The sinal plications have increased to six instead of four. Bifurcations and branchings of plications are in general more numerous than in the case of No. X 218. A third exterior impression of the brachial valve (Ser. No. X 220, PI. I, Fig. 9a) has the following measurements: Greatest width = 13 mm Hinge line = 6 mm'. Height = 9 mm Proportion of height to width = Part of the hinge line is broken away, so its extent is in doubt. No. X 220 differs from No. X 218 in (1) the lesser prominence of the sinus, (2) more bifurca-. 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 Grabau, Amadeus W. (Amadeus William), 1870-1946. Peking, Published by the Geological Survey of China
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaleont, bookyear1922
