198 DR. B. PETRONIEVICS ON THE LOWER JAWS OF THE 



Cynognathus they are attached closely to the dentary bone 

 (comp. the right ramus of the lower jaw of Gomphognathus 

 in text-fig. 1 with the right ramus of Cynognathus in text-fig. 7). 



Text-figure 1. 



GumphognatJms : inferior surface of skull and mandibles. X i. 

 ang. ; angular. 



ang.lm. ; angular lamina. t 

 ang.n. ; angular notch. 

 art. ; articular. 



art.srf.deut.? ; articular surface of dentary. 

 art.srf.qu. ; artieular surface of quadrate. 

 dent. ; dentary. 

 dent.n. ; dental notch. 

 prart.; prearticulnr. 

 sang. ;. supra- angular. 

 spl. ; splenial. 

 st. ? ; stapes. 



2. In Gomphognathus the posterior end of the dentary bone 

 goes almost as far back as the articular bones (comp. text-figs. 2 



