. Carnegie Institution of Washington publication. . FlGS. 678 AND 679.âAmyda franciscce. X i- 678. Carapace. 679. Plastron, ent, entoplastron; epi, epiplastron; hyo, hyoplastron; hypo, hvpoplastron; xiphj xiphiplastron. In form the carapace (plate 102; text-fig. 678) is broadly elliptical, slightlv truncated in front and more decidedly truncated hehind. Antero-posteriorly the carapace is slightly archt; more strongly from side to side. The length in a straight line is 315 mm.; the greatest width is 293 mm. This species is referred to the genus Amyda because of the presence of 8 pairs of costal
. Carnegie Institution of Washington publication. . FlGS. 678 AND 679.âAmyda franciscce. X i- 678. Carapace. 679. Plastron, ent, entoplastron; epi, epiplastron; hyo, hyoplastron; hypo, hvpoplastron; xiphj xiphiplastron. In form the carapace (plate 102; text-fig. 678) is broadly elliptical, slightlv truncated in front and more decidedly truncated hehind. Antero-posteriorly the carapace is slightly archt; more strongly from side to side. The length in a straight line is 315 mm.; the greatest width is 293 mm. This species is referred to the genus Amyda because of the presence of 8 pairs of costals and the absence of a preneural. There are 7 neurals, of which the first is very large and the seventh much reduced. The anterior neural is considerably broader in front than behind. The table herewith presents the dimensions of the neurals. The four neurals succeeding the first are wider behind than in front; the next two are wider in front than hehind. The nuchal has a fore-and-aft extent of 36 mm., and is about 130 mm. from side to side. The anterior border of the bone is occupied by a narrow, smooth band. There appears to have been a small median fontanel between the nuchal and the first neural. The form and the relative proportions of the costal plates maybe seen from the illustrations. Their free borders are beveled off to an acute edge. The costal ribs are broad and they project Neurals. Length. Greatest width. , 55 35 2 +4 29 ; 40 *9 4 34 24 5 6 3' 28 19 â 7 7 -" â 7. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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