16G 



BAL^.N0PTEEIM5. 



narrowed externally. The lower jaw is massive, has a high, pointed 

 coronoid process, and a considerable but not excessive curve. 



"Dimensions {in inches) of Skulls of different examples 0/ Physalus 

 antiquorum and of the specimen at Utrecht. 



Length of skull in a straight line 



Breadth of condyles 



Breadth of exoccipitals 



Breadth of squamosals (greatest breadth 1 

 of skull)..' J 



Length of supraoccipital 



Length of articular process of squamosal . . . 



Orbital process of frontal, length 



Orbital process of frontal, breadth at base 1 

 (from curved border of maxillary to I 

 hinder edge of orbital process of frontal) J 



Orbital process of frontal, breadth at upper 1 

 surface of outer end _( 



Nasals, length 



Nasals, breadth of the two, at posterior end 



Nasals, breadth of the two, at anterior end 



Length of beak (from cvu-ved border of 1 

 maxillary to tip of beak) J 



Length of maxillary 



Projection of maxillary beyond premaxillary 



Breadth of masillaries at hinder end , 



Breadth of maxillaries across orbital pi'o- 

 cesses (following curve) 



Breadth of beak at base (all the measure- 

 ments across the beak include the curve 

 of the upper surface) 



Breadth of beak at one-quarter of its length 

 from base J 



Breadth of maxillary at the same point 



Breadth of premaxillary at same point 



Breadth of beak at middle 



Breadth of maxillary at middle 



Breadth of premaxillary at middle 



Breadth of beak at three-quarters of its 1 

 length from base J 



Breadth of maxillary at same point 



Breadth of premaxillary at same point 



Length of lower jaw in a straight line 



Height at coronoid process 



Height at middle 



Amount of curve (greatest distance of the 1 

 inner surface of the jaw from a straight I 

 line drawn between the extremities) ... J 



-S., 



118 184 



15 12 



36 56 



60 



41 

 36 

 32 



34 



18 



8^ 

 6 



n 



133 



145 



9 



17 



89 



186 

 14 

 55 



86 



m 



34 

 30 



32 



17 



7 



11 

 132 



142^ 

 10^ 

 17' 



179 

 12 

 54 



78 



38 

 35 

 29 



35 



56 54 55 





126 

 14i 

 39 



60 



26 

 25 



18 12^ 



3 

 9 



119 



137 



8 

 15 



84 



45 45 



11 



13i 



6 

 33 



94 



18^ 

 5 



180 

 21 



14i 



5 

 36 

 10 



6 



23 



21 



38 



111 



lU 



38 



56 



26 

 24 

 19 



21 



124 



7 

 3 

 6 



75 



87 



i'3 



67 



39 



30 



10 



3i 

 22i 



7i 



3 



13 



3 



24 



112 



15 



n 



15 



Floiver, P. Z. 8. 1864, 411. 



" In all the characters by which the atlas of Physalus differs from 

 that of Sibhaldivs, the present specimen agrees with the former. 



