337 



SYLVIA. WARBLER. 



Bill rather short, slender, a httle broader than high at the 

 base, slightly compressed toward the end ; upper mandible 

 with the dorsal outline straight and declinate, at the end convex, 

 the ridge narrow and rather distinct, the nasal depression large, 

 the sides convex and declinate, the edges sharp and overlapping, 

 with a rather distinct notch close to the tip, which is declinate, 

 very narrow and rounded ; lower mandible with the angle of 

 moderate length, rather narrow and rounded, the dorsal outline 

 very slightly convex, the back broad and flattened at the base, 

 convex towards the end, the sides convex and sloping outwards, 

 the edges sharp, the tip broader than that of the upper ; the 

 gape-line straight. 



The upper mandible within is concave, with a median pro- 

 minent line, the palate flat, with two ridges, the posterior aper- 

 ture of the nares oblongo-linear, margined with minute papillae. 

 The lower mandible more concave, with a median prominent 

 line. The tongue slender, sagittate, and finely papillate at the 

 base, tapering to a slit and lacerate point. The mouth bedewed 

 with a clammy fluid. CEsophagus of moderate width, without 

 croj) ; proventriculus oblong ; stomach a gizzard of moderate 

 power, roundish, compressed, its lateral muscles rather thin, 

 the tendons large, the epithelium thin, tough, longitudinally 

 rugous ; the intestine short, of moderate width ; the coeca very 

 small and cylindrical, the cloaca oblong. PL XIIL Fig. 8. 



Nostrils oblong, narrow, oj)erculate. Eyes rather small ; 

 eyelids feathered, with a narrow bare crenate margin. Ex- 

 ternal aperture of the ear large, roundish. 



General form slender, the body ovate, the neck short ; the 

 head ovate ; the feet slender ; tarsus rather short, much com- 

 pressed, with eight distinct anterior scutella ; toes of moderate 

 length, much compressed ; the first rather large, broad at the 



VOL. II. z 



