DS) AS Bs XVI. 
Plate XVII. Fig. 1, Pachyrhisodus ee ee sp. nov. ‘nat ; : 
size. Den Dentary. 4r¢ Articular. @ Quadrate. POP : 
perculum. Of Operculum. 4 A- small toothed element, the 
significance of which is not known. > 
Fig. 2. Pachyrhizodus velux, sp. nov. 
tary, one-half natural size. Hy Supposed hnyeids vatural size. a 
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