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NEW YORK STATE MUSEUM 



illaries, as already described. The body of one of these bones is 

 slenderer along its middle length, separated by a wide interval from 

 its fellow, and half the distance from the vomer (v). 



Its " ascending process " is short, and is carried along the upper 

 vomerine margin, where it unites with the opposite palatine to form 



Fir.. 15 



>n«> 



Fig. 14 Fkull of Spatula clypeata seen from above; mandible removed. 

 Natr.ral size. Letters as in figure 13 



I'iG. 15 T'nder side of the skull of Spatula clypeata; mandible removed. 

 Natural size. Same specimen, with mxp, maxillopalatine, and the other' letters as in 

 figures 13 and 14 



a longitudinal, riblike reenforcement along the upper edge of that 

 bone.. It is only in this situation that the anserine palatines meet 

 each other. 



The joint that one of these bones makes with the corresponding 

 pterygoid (pt) is somewhat after the order of a modified enarthro- 



