Tongue and Throat. 



CHAP. III. 



Tie Tongue and Throat. 



YNclofed within the Cavity of the plate IIL 

 ■*■ horny Bill, which I have defcribed Fi& i. 

 above, is a Membrane furnifhed 

 with nine Ranges of Teeth for the 

 Comminution of its Food, which 

 forms itfelf, by the Expanfion of the 

 upper and Circumvolution of the 

 lower Part, into a Tongue and Throat. 

 When wholly extended in Breadth 

 and Length, it is nearly a Rectangle; 

 but that Part, where the Membrane 

 is broadefi:, being bent back, and in- 

 clined to about an Angle of 4 °s, 

 the two Sides at the Bend are ga- 

 thered, and join by a flender Li- 

 gament ; below which the inferior 

 Part, by its Circumvolution and the 

 limple Contact of the Sides, forms 

 a Throat, which goes off tapering, 

 while the Expanfion of the upper 

 Part performs the Office of a Tongue. plateI]I 

 When in this Form, 'tis not un- ' 

 like a Mufhroom. 



To 



