an Amphibian from South Africa. 



343 



plate whose upper border nearly touches the roof of the skull, back 

 to cover the inner side of the quadrate, and to articulate with the 

 squamosal. 



The rest of the bone appears in the palate, and its lateral border 

 has a suture with the palatine. 



There is apparently no transpalatine. The palatine is an extremely 

 narrow slip of bone lying between the maxilla and the very large 

 interpterygoid vacuity. It apparently bears three rather large teeth. 

 Its inner border is in contact with the pterygoid behind and the 

 prevonier in front, and its anterior border forms the back of the 

 posterior naris. 



The prevoraers are large bones meeting one another in the middle 

 line, articulating in front with the preraaxillae and forming the inner 

 borders of the posterior nares, each of which is enclosed by a row 

 of teeth. 



All the individuals have the lower jaw present and tightly closed 

 on the skull. The jaw is very slender, and the thin bones of which 



Suil.{^^- 



Fig. 3. Micropholis Stoivi, Hux. Ventral surface of anterior part of skeleton. 

 X 1. Skull from E. 510. Lower jaw from all material. Shoulder-girdle 

 and vertebrae from a specimen in the Geological Society's Collection. 

 Ang. angular; C7\ eoronoid ; Den. dentary ; P. Art. prearticular ; P.v. 

 prevomer ; Pa. 8. parasphenoid ; Pal. palatine; Pt. pterygoid; Sp. 

 splenial ; Suii.Ang. surangular. 



it is composed have long overlaps : in development the ends of these 

 bones are almost always pulled off with the matrix, but owing to 

 the abundance of material it is possible to be quite certain of the 

 structure. 



The articular is well ossified, but not produced behind the 

 articulation. Its inner side is covered by the prearticular, which 

 extends forward below the supra-Meckelian vacuity on the inner side 

 of the jaw for nearly half its length. In front its upper end rests 

 against the dentary. The hinder end of the prearticular is pierced by 

 a small foramen for the chorda tympani (seventh nerve). The outer 



