31^0 Mr. Yarrell's Notes on Comparative jdnatomy. 



of true ova ; in colour exactly similar to that of female Pheasants when 

 they have assumed the male plumage. Oviduct not deficient in size ; 

 but its canal obliterated at the part immediately in contact with the 

 ovarium. 



White Stork. [Ciconia alba, Briss.] 



(Esophagus phcated, and enlarged just above the zone of gastric glands, 

 forming a crop. Stomach intermediate as to the thickness of itsparietes, 

 being in substance more muscular than that of the Birds of prey. 

 Intestines 5 feet in length, with minute rudiments only of two small 

 ca!ca. 



Common Bittern. [Ardea stellaris, Linn.] 



Trachea descending on the side of the neck, not in front as in most 

 other birds. (Esophagus plicated. Stomach membranous. Intestines 

 very narrow and long, measuring 4 feet 7 inches, with a rudiment of one 

 ccBcam only. 



Crested Grebe. [Pcdiceps cristatus, I-ath.] 

 A young male. (Esophagus narrow and plicated. Stomach mem- 

 branous, containing a ball of feathers. Intestines narrow, 5 feet 6 inches 

 in length, having cereal appendages of* -,^o^ of an inch only. 



Red-throated Diver. [Colymlus septentrionalisy Linn.] 

 A young male. . (Esophagus plicated longitudinally, capable of great 

 distension. Stomach elongated, the lower portion most muscular. 

 Intestines 4 feet 4 inches in length. 



Tame Swan. [CT/gnus dor, Briss.] 

 Male. Stomach a true gizzard and large. Intestines 18 feet in length, 

 with two ccBcal appendages of 15 inches each. 



Wild Swan. ICygnns ferns, Briss.] 

 Trachea exhibiting the well known peculiarit'es. Stomach a mus 



• In an old male I have observed the csca to have attaiaed the length of 

 two inches. W. Y. 



J 



