U. S. GEOLOGICAL STJHVET 







tif}^ 



dps dp4 



MONOGRAPH 65 PLATE XXIII 



cd. 





As 



''^> 



Ai 



JUVEiNiLb JAW Kbi-bRRED BY MARSH TO BRONTOPS 



One-half natural size. (See p. 455.) Important because it 

 ikeleton. Ai, External view of the left ramus; A;, internal 

 view; A^, superior view of the left ramus. cd. Condyle; di, 

 , alveolus for second deciduous incisor; dij, alveolus for third 

 ning in with deciduous series and probably belonging with it); 



Generic and specific refereni 



exhibits the chara(5ters of the juvenile ; 

 view of the right ramus; A3, anterior 

 alveolus for fir^ deciduous incisor; di2 

 deciduous incisor; p\^ fir^ premolar (coi 



dp2, second deciduous premolar; dps, third deciduous premolar; dpi, fourth deciduous premolar 



