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TRUMPETER SWAN. 



Cygnus Buccinator, Richardson. 



PLATE CCCCVI. Adult. 



Having notliing to add to what has akeady been said of this species 

 in the Fourth Volume (p. 536), where the young was described, I pro- 

 ceed to give an account of the external form and colour of the adult. 



Cygvus Buccinator, Richardson. 



Adult Male. Plate CCCCVI. 



Bill longer than the head, higher than broad at the base, depressed, 

 and a little widened toward the end, rounded at the tip. Upper man- 

 dible with the dorsal line sloping, the ridge very broad at the base, 

 with a large depression, narrowed between the nostrils, convex toward 

 the end, the sides nearly erect at the base, gradually becoming more 

 horizontal and convex toward the end, the sides soft and thin, with 

 forty-five transverse, little elevated lamellae internally, the unguis ob- 

 otate. Lower mandible narrow, flattened, with the angle very long, 

 rather narrow, anteriorly rounded, the sides convex, the edges erect, 

 inclinate, with about twenty-six external lamellae, and about seventy 

 above, the unguis obovate-triangular. Nasal groove elliptical, subbasal, 

 covered by the soft membrane of the bill ; nostrils submedial, longi- 

 tudinal, placed near the ridge, elliptical, pervious. 



Head of moderate size, oblong, compressed ; neck extremely long 

 and slender ; body very large, compact, depressed. Feet short, stout, 

 placed a little behind the centre of the body ; legs bare, an inch and a 

 half above the joint ; tarsus short, a little compressed, covered all round 

 with angular scales, of which the posterior are extremely small. Hind 

 toe extremely small, with a very narrow membrane ; third toe longest, 

 fovu"th very little shorter, second considerably shorter ; anterior toes 

 covered with angular scales for nearly half the length, scutellate in the 

 rest of their extent, and connected by broad reticulated entire mem- 

 branes. Claws rather small, strong, arched, compressed, rather obtuse> 

 that of the middle toe much larger, with a dilated thin edge. 



