28o 



NEW YORK STATE MUSEUM 



beauty, as is the glistening white skull of a swan before me, which 

 is exceedingly light for its size and withal so graceful in outline. 



Few and unimportant are the differences that are found to exist 

 between any two mandibles of representative Anatinae, the general 

 type of the structure being quite a uniform pattern, as it prevails 



Fig. 20 



Fig. 19 Mandible of Spatula clypeata; seen from above; adult ^. Natural 

 size from the specimen 



Fig. 20 Mandible of Clangula islandica; seen from above, adult ^. Drawn 

 natural size by the author from the specimen 



throughout the entire group. Perhaps Spatula offers us as great a 

 departure from the common form of the anatine mandible as any 

 American duck we have, and even here we find, on side view, that 

 it possesses all the essential characters of the bone as found in the 

 group. Seen upon this latter aspect we have presented us for 

 examination the lamelliform and vertical angular processes. These 



