DESCRIPTION OF PLATE XXXIV. 



Plagiaulax Becklesii. P. minor. Microlestes antiqtttjs. 

 Thylacoleo carnifex. Cheiromts Madagascariensis. 



The drawings in this Plate have been reproduced from the 

 woodcuts which accompanied the memoirs as originally pub- 

 lished in the Quart. Journ. Geol. Soc. for August, 1857, and 

 November, 1862. (See pages 412 & 436.) 



Fig. 1. Plagiaulax Becklesii. The left ramus of the lower jaw, nearly 

 perfect, showing the outer surface. Magnified 4 diameters, a, 

 incisor ; b, condyle ; c, coronoid process, broken at the edges ; 

 d, inferior boundary ridge ; a depression is seen on the inner 

 surface of the bone at the base of the coronoid ; pm., premolars. 



Figs. 2 to 6. Plagiaulax minor. 



Fig. 2. Outside of the right ramus of the lower jaw, magnified 4 diame- 

 ters. All the teeth are in place and well preserved. The 

 hinder part of the jaw-bone, with the ascending ramus and 

 posterior angle, is broken away. 



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. The two true molars. 



pm. The four premolars. 



e. The length of the jaw, natural size. 



Figs. 3 and 4. The first molar, magnified 8 diameters ; 3, the crown ; 

 4, side-view. 



Figs. 5 and 6. Second molar ; the crown and side-view. 



Figs. 7 and 8. Teeth of Microlestes antiquus of Plieninger, from the 

 Upper Trias of Wirtemberg. Magnified. 



Fig. 7. Crown of the smaller molar. 1 



Fig. 8. Crown of larger tooth, 2 with part of the crown broken off. 



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



2 Ibid. fig. 442. 



VOL. II. 



