38 



CALIFORNIA ACADEMY OF SCIENCES 



EXPLANATION OF PLATE I. 



Thdldttosuvnis alexandrae. 

 Type specimen. All fiijures three fourth.^ natural size. 



Cranium slightly distorted, the anterior 



Fig. 1. Anterior portion of eraniuni and niandilde 



end of the maxillary being covered. 

 Fig. 2. Palatal view of cranium. 

 Fig. 3. Inner side of mandible. 



Legend. 



F, frontal 



Pf, prefrontal 



N, nasal 



A, doul)tful element anterior to 



narial opening 

 Pm, premaxillary 

 M, maxillary 

 L, lachrymal 

 PI, palatine 



J, jwgal 

 V, prevomer 



/, inferior narial opening 

 Sa, supra-angular 

 An, angular 

 D, dentary 

 Sp, splenial 



a, h, c, sections of cranium. 

 PL II, figs, la, \h, Ic. 



See 



JV and A in fig. 1 are situated in the superior narial opening. 



