A NT I) AVES OF NORTH AMERICA, 



31 



Fig. 8. 



Fig. 4. 



NOTHOBAUEUS ? ANDIUANI. 



External nostrils posterior. 



Pubes entering acetabulum, transverse, united medially. 



Vertebrae with zygapophyses only. 



Ribs singled leaded. Chevron hones present. 



SAUROI'TERYGIA. 



