98 CHELONIA. 



30936. The conjoint epiplastrals, imperfect posteriorly; from the 

 (Fig.) Lower Miocene (Upper Oligocene) of St. Gerand-le-Puy 

 (Allier), France. The type specimen (fig. 19). The two 

 bones are completely anchylosed together, and the anterior 

 part of the epiplastral mnst also be included in the speci- 

 men, although its boundaries are not visible. 



Bravard Collection. Purchased, 1852. 



30928. The conjoint epiplastrals, wanting part of the right half 

 and the posterior portion ; from St. Gerand-le-Puy. 



Bravard Collection. 



30918-9. An apparently associated right hyoplastral and left hypo- 

 plastral not improbably referable to this species ; from St. 

 Gerand-le-Puy. The contour of the hyoplastral differs 

 somewhat from that of the type species. 



Bravard Collection. 



Ptychogaster (?) cayhixensis, Lydekker, n. sp. 



Agreeing approximately in size with the preceding species, but 

 the upper surface of the thickened portion of the epiplastrals much 

 shorter an tero -posteriorly, with a distinct median prominence. 

 Gular shields short and wide. 



Hob. Europe (Prance). 



Ptychogaster (?) cay htxensis.— The anterior extremity of the plastron; from the 

 Phosphorites of Central France. \. g, gular, hi, humeral, pec, pec- 

 toral shield. 



R. 1302. The anterior extremity of the plastron ; from the Upper 



{Fig.) Eocene (Lower Oligocene) Phosphorites of Bach (Lot), 



France. The type specimen (fig. 20). The epiplastrals 



and entoplastral aro completely fused together, although 



the outline of the latter bone can be traced. 



By exchange, 1888. 



