. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. 180 Annals of the Carnegie Museim. The plastron (Plate IX) has the hinder extremity missing. The total length cannot, therefore, be accurately determined ; but it must have been close to 205 mm. The breadth, measured on the meso- plastra and following the curves, is 186 mm. The whole width of the animal was, of course, somewhat greater. The median region is slightly concave to a ridtre which runs from the free border of the front lobe. Fk;. 2. Bacna callosa W^y. Diagram of plastron. yi,'*,y n
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. 180 Annals of the Carnegie Museim. The plastron (Plate IX) has the hinder extremity missing. The total length cannot, therefore, be accurately determined ; but it must have been close to 205 mm. The breadth, measured on the meso- plastra and following the curves, is 186 mm. The whole width of the animal was, of course, somewhat greater. The median region is slightly concave to a ridtre which runs from the free border of the front lobe. Fk;. 2. Bacna callosa W^y. Diagram of plastron. yi,'*,y natural size. The names of the bones are indicated on the left side of the figure ; of the scutes, on the right side. !?/.//., epiplastron ; c;//.//., entoplastron ; //rc/A , hyoplastron ; w^., meso- plastron ; , hypoplastron ; , xiphiplastron; /.^/<., intergular ; gu., gular ; /mm., humeral; pect., pectoral; abdominal ; y^'w., femoral; aft., anal. to that of the hinder lobe. I'rom this ridge the lower surface slopes upward and outward to the borders of the plastral bones. The bridge has a fore and aft extent of 87 mm. The anterior lobe is short and narrow. The length is 52 mm.; the width at the base, 72 mm.; at the hinder ends of the epiplastra, 38 mm. The latter bones are small and they meet along the midline, in front of the entoplastron,. 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 Museum; Carnegie Museum of Natural History. [Pittsburgh] : Published by authority of the Board of Trustees of the Carnegie Institute
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Keywords: ., booka, bookcentury1900, bookdecade1900, booksubjectnaturalhistory
