( 614 ) 

 SCAUP DUCK. 



FULIGVLA MARILA, StEPH. 

 PLATE CCXXIX. Vol. III. p. 226. 



Male. Breadth of mouth 8 twelfths ; its roof broadly concave, with 

 a median prominent line, on which are four papillae, and at the ante- 

 rior part two very short prominent lines ; on the upper mandible on 

 each side are 42 lamellae, not projecting beyond the margin, and about 

 90 on the lower mandible. Tongue 1 inch 8 twelfths long, fleshy, with 

 a deep groove above, a thin-edged series of lamellae on each side, the 

 tip somewhat semicircular and thin-edged. (Esophagus 8 inches long, 

 its width from 5 twelfths to 4 twelfths, at the lower part of the neck 

 enlarged to 6 twelfths, on entering the thorax contracted to 3 twelfths ; 

 the proventriculus oblong, 10 twelfths in breadth. The stomach is a 

 very muscular gizzard, of a transversely elliptical form, placed oblique- 

 ly, 1 inch 8 twelfths long, 2 inches 3 twelfths broad ; the right muscle 

 10 twelfths thick, the left 9 twelfths ; the grinding surfaces of the epi- 

 thelium longitudinally rugous, and of a brownish-red colour. Lobes of 

 the liver 1^ inch and 1 inch 1 twelfth long ; gall-bladder oblong, 1 inch 

 long by 4 twelfths. The intestine makes 16 turns ; its length is 4 feet 

 7 inches, its width 4 twelfths ; duodenal fold 3 inches ; cceca 4 inches 

 9 twelfths long, only 1^ twelfth in breadth, narrower at the base and 

 at the extremity ; rectum 3 inches 9 twelfths long, 3^ twelfths wide. 



Trachea 6^ inches long, a little flattened, carinate behind at the 

 upper part, from b^ twelfths to 3j twelfths in breadth ; its rings mode- 

 rately firm, unless at the back part, where they are cartilaginous ; 108 

 in number, with about 8 more incorporated with the tympanum, which is 

 very large, of an irregular form, its projection on the right side having 

 a semicircular carina, and a great portion of it being membranous ; its 

 breadth 1 inch, its greatest height 1 inch 2 twelfths. Bronchi short, 

 one of 25 half rings, the other of 30. Muscles as usual in this family. 



