TEllTrARY VEETEBEATA OE THE FATt'M. 
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and posteriorly tlic marginals [M. 1-11) are somewhat everted, but in the region 
of the junction with the plastron they arc vertical. The angles of the bridge between 
the ])lastron and the carapace are greatly thickened and form a prominent border, 
upon which the shell rests. 
'file plastron (PI. XXIV, fig. 1 b; text-fig. 89) is larger and the openings of the shell 
Text-fig. 89. 
ahd., abdominal shield; an., anal shield; Ent., entoplastral bone; Ep.ii., epiplastral bone ; /m., femoral 
shield; //., gular shield; h., humeral shield; Eyp., hyoplastral bone; Jhjp.p., hypoplastral l)one ; 
pect., pectoral shield ; Xip., xiphiplastral bone. About j. nat. size. 
are smaller than in most of the recent giant Land-d’ortoises. In some individuals, 
including the type, the epiplastral region {Ep.p.) is prolonged forwards to a greater or 
less extent: as these have a deeply concave ])lastron, they are j)robably males. In the 
specimen figured on PI. XXIV. fig. 1 B, however, this projection is very slight: as the 
concavity of the plastron in this shell is very slight, it may be regarded as belonging to 
