14 GEOLOGICAL SURVEY OF TEXAS. 



which he is unwilling to regard as belonging to another species, as he finds 

 every gradation between the two forms. As the collection of fragments 

 of Belodons here described includes remains of but one species, and proba- 

 bly individual, I can not do better than follow Von Meyer's example for 

 the present. 



The fragment of femur includes the low trochanteric crest, which is 

 characteristic of the genus. It is angulate at the middle, the superior 

 half being directed toward the interior border of the shaft, and oblique to 

 its axis. The external border of the shaft is much less robust than the 

 internal border. It has been somewhat expanded above by pressure. 

 The supposed fibula is a slender bone with an (5pen sigmoid flexure, and 

 a want of continuity of the inner or longest concave margin. The 

 mai'gin from one of the extremities of the bone advances on the flat side 

 of the shaft and forms the boundary of a surface apparently for muscular 

 insertion. The only extremity which is preserved is somewhat weathered. 

 It is in section an oval, flat on one side. The condyle is simply convex in 

 both directions. 



Measurements. 



Mm. 



Elevation of crown of ungrooved tooth 32 



Diameters of same at base \ anteroposterior ; 9..5 



(transverse 9.5 



Elevation of crown of grooved tooth 20 



Diameters of same at base Unteroposterior 8 



(transverse 9 



Tranverse diameter of left frontal bone at orbit 34 



Tranverse diameter of left frontal bone at prefontal 17.5 



Thickness frontal at median suture 16 



Greatest width between olfactory ridges 42 



Inferior width splenial at beginning of symphysis 37 



Length splenial included in symphysis 135 



40 

 70 



Diameters fibula near middle { anteroposterior 29 



tranverse 21 



Diameters dermal scute Unteroposterior 72 



( transverse (estimated).. . /8 



Thickness of same at sutiu'al margin 10 



Thickness with keel 27 



Diameters of a free dermal bone \ anteroposterior 27 



( transverse 27 



Thickness of same 8 



vertical 46 



anteroposterior 56 



Diameters of femur at third trochanter \ anteroposterior 



( transverse , 



I 



Diameter of dorsal centrum \ 



The measurements of the skull are about one-half larger than those of 

 the B. buceros. 



