1857.] 



FALCONER PLAGIAULAX. 



281 



Fig. 15. — Plagiaulax minor. Outside of the right ramus of the 

 lower jaw ; and the two molars. Magnified. 



hC Ui 



[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. Right ramus of lower jaw, with all the teeth ; magnified 4 diameters. 



a. Incisor with point broken off. a', impression of same, showing that the inner side near 



the apex was hollowed out in a longitudinal direction. 



b. 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. 



[Woodcut fig. 15 has been kindly lent by John Murray, Esq., F.G.S.] 



Figs. 16 & 17. — Teeth of Microlestes antiquus of Plieninger, 

 from the Upper Trias of Wirtemberg. Magnified. 



Fig. l6. h. Crown of the smaller molar *. 



Fig. 17. c. Crown of larger tooth f, with part of the crown broken off. 



[The cuts, figs. 16 & 17, have been kindly lent by John Murray, Esq., F.G.S.] 



* See Lyell's Manual Elem. of Geol. 5th edit. fig. 441, i, p. 343. 

 t Ibid. fig. 442. 



X 2 



