3'iO Mr. Yarr ell's Notes mi Comparative .Anatomy. 



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

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

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

 ovarium. 



White Stork. [Ciconia alba, Briss.] 



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

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

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

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

 ccEca. 



Common Bittern, [.^rdea stellaris, Linn.] 



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

 other birds. CEsophagits plicated. Stomach membranous. Intestines 

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

 ceBcum only. 



Crested Grebe. [Podiceps cristatus, Lath.] 

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

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

 in length, having cctcal appendages of* yV of an inch only. 



Red-throated Diver. \Cohjmliis septenirionalis, 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. \Cygnus olor, Biiss.] 

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

 with two ctEcal appendages of 15 inches each. 



Wild Swan. [Cygnus ferus, Briss.] 

 Trachea exhibiting the well known peculiarities. Stomach a mus- 



=* In an old male I have observed the cceca to have attained the ler.gth of 

 two inches. W. Y. 



