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UTAMANIA. RAZOR-BILL. 



The Razor-bills differ from the Guillemots chiefly in the 

 dilated form of their bill, and in having the tail cuneate. 

 Their proportions otherwise are the same. 



Bill rather shorter than the head, stout, very high or 

 vertically expanded, but much compressed ; upper mandible 

 with the nasal sinus broad and feathered, the dorsal line 

 arcuate and decurvate, the ridge extremely narrow, the sides 

 erect and transversely grooved, the edges sharp and inflected, 

 with very slight notches close to the small decurved tip ; 

 lower mandible with the angle long, and a small horny appen- 

 dage in it, the dorsal line ascending and toward the end con- 

 cave, the edges sharp and inflected, decurved and direct at 

 the end. 



Mouth of moderate width ; anterior palate flat, with five 

 prominent lines. Tongue slender, trigonal, tapering, pointed; 

 oesophagus wide, excessively dilated in the lower part ; 

 stomach small, elliptical, with the muscular coat rather 

 thin, with round tendinous spaces ; the epithelium thin, 

 dense, longitudinally plicate ; intestine of moderate length 

 and width, with small coeca. 



In other respects they resemble the Guillemots, and their 

 habits are the same as theirs. 



