J 52 TETRAO TETRIX. 



the head rather small and oblong; the wings rather short, 

 broad, and curved ; the tail short ; the feet of moderate length, 

 and rather stout. The general form, in short, is in most respects 

 similar to that of the male, as is that of the bill and toes. 



The oesophagus is nine inches long. The crop, which com- 

 mences at the distance of three inches and three-fourths from 

 the tongue, is four inches long, its orifice one. The average 

 diameter of the oesophagus, when dilated, is half an inch. The 

 gizzard is two inches long, one inch and three-fourths in 

 breadth, an inch and a half in thickness. The entire length 

 of the intestine is sixty-six inches, the rectum being seven. 

 The duodenum has a diameter of four and a half twelfths, and 

 the rest of the small intestine continues of about the same 

 thickness ; that of the rectum is five-twelfths. The coeca, 

 which are twenty-nine inches long, are four-twelfths in diameter 

 at their commencement, contract to two and a half twelfths, 

 then at the distance of five inches enlarge to seven-twelfths, 

 and so continue until near the end, when they contract a little. 

 They are marked with seven or eight longitudinal white bands. 



The plumage is full, close, and rather blended ; the feathers 

 generally oblong, rounded, with ordinary gloss. The wings 

 are of the same form as in the male, the fourth quill being 

 longest, the third almost equal, the first longer than the eighth. 

 The tail differs considerably in form, being broadly emarginate 

 or retuse, the four outer feathers a little longer, but in no degree 

 curved. It is very short, and composed of eighteen feathers, 

 as in the male. 



The bill, feet, and eyes are coloured as in the male. The 

 superciliary membrane, which is villous and much smaller, is 

 scarlet tinged with carmine. The general colour of the head 

 and neck is yellowish-red, barred with brownish-black, each 

 feather on the head with three, on the neck with four bars of 

 the latter. On the fore part of the back and the scapulars the 

 bars are broader and curved, the last bar forming a pointed 

 patch. The hind part of the back is of a deeper red, barred 

 with brownish-black ; the upper tail-coverts similar. The 

 breast and sides are of the same colours, but with the dark 

 bars curved, the ends greyish-white, the sides with more red. 



