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Vou. IX. TRENTON, N. J., OCTOBER, 1889. No. 10. 
NOTE ON THE TONGUE OF CHRYSOTIS ASTIVA. 
F, TUCKERMAN. 
HE following description is based upon an examination of 
: the tongue of a single specimen of this South American 
parrot, probably the most common of those that reach our 
country. 
The organ is of a dull, leaden color, is somewhat large and 
fleshy, expanded at the tip, and thick posteriorly. It measures 
19 mm. in length, its greatest transverse width is 9.5 mm., and 
at its thickest part it measures 8.5 mm. 
There is a manifest division into a depressed anterior and an 
elevated posterior portion. The anterior division is perfectly 
free from the floor of the mouth for 10 mm., or a trifle more 
than one half the length of the organ. The tongue thus pos- 
sesses great freedom of movement anteriorly, as well as increased 
prehensile power. The elevation of the posterior division is 
caused by the lateral margins being folded inwards, their op- 
posed edges being at first parallel, and separated by a well- 
defined, narrow, and shallow groove. In the fore half of the 
tongue the sides diverge rapidly, forming with the broad anterior 
extremity nearly an equilateral triangle. 
The entire dorsal surface is quite smooth, unpapillose, and 
presents a finely wrinkled appearance. Posteriorly the dorsum is 
