1862.] 



FALCONER PLAGIATJLAX. 



367 



Figs. 11, 12, & 13. — Plagiaiilax Becklesii. Fragment consisting of 

 the anterior portion of the Eight Ramus of the Lower Jaw. Magnified 

 2 diameters. 



Fig. 11. Outer surface. 



Fig. 12. Inner surface. 



Fig. 13. Vertical view, seen from above. 



x,_/:: 



\ 12. 



a. Incisor. Jpm. Premolars. 



h. Symphysial harmonia. c. Mentary foramen. 



Fig. 15. — Plagiaulax minor. Outside of the Right Ramus of the 

 Loiver Jaw ; and the tivo Molars. Magnified. 

 m 



I ! 1 



• m ' pm ; 



[All the teeth in this specimen are in place and well preserved. The hinder 

 part of the jaw-bone, with the ascending ramus and posterior angle, are- broken 

 away.] 



a b. Eight ramus of lower jaw, with all the teeth ; magnified 4 diameters. 

 a. Incisor with point broken ofi". a', impression of same, showing that the 

 inner side near the apex was hollowed out in a longitudinal direction. 

 h. Offset of coronoid, the rest of which is wanting. 

 m, m. The two true molars. 

 pm. The four premolars. 



c. The first molar ; magnified 8 diameters. Upper figure, the crown. Lower 



figure, side-view. 



d. Second molar ; the crown and side-view. 



e. The length of the jaw, natural size. 



