BALTIMORE ORIOLE. 



281 



a 



part its diameter is about'4 twelfths ; it passes along the right side of the 

 neck, forming an elongated dilatation, of which the greatest breadth is 

 6 twelfths ; and on entering the thorax, ale, contracts to 3 twelfths. The 

 proventriculus, cd, is 31 twelfths in breadth. The stomach, de, is an oblong 

 gizzard, 7 twelfths long, 5 twelfths broad, situated obliquely, its fundus 

 being directed toward the right side. The la- 

 teral muscles are moderately developed ; the 

 epithelium longitudinally rugous, tough, and of 

 a reddish-brown colour. The contents of the 

 stomach are remains of insects. The intestine 

 is short and of moderate width, being 7^ inches 

 long, its diameter in the duodenal portion 2\ 

 twelfths. The coeca, which come off at the dis- 

 tance of 10 twelfths from the extremity, are 

 very small, 2 twelfths long, \ twelfth in width. 

 The cloaca is globular, and 7 twelfths in dia- 

 meter. 



The trachea is 1 inch 10 twelfths long, its 

 breadth anteriorly 1^ twelfths, at the lower 

 part 1 twelfth. The rings, about 70, are well 

 ossified, and considerably flattened. The infe- 

 rior larynx has four pairs of muscles besides the 

 sterno-tracheal. The bronchi have about 12 

 half rings. 



In another individual the intestine is 7 

 inches 9 twelfths long. The contents of the 

 stomach are remains of insects and particles 

 of quartz. 



These circumstances shew, that in the struc- 

 ture of its digestive organs as well as in the form of its bill, the Bal- 

 timore Bird, like other Icteri, is much more intimately allied to the 

 Buntings and Finches than to the Starlings and Crows. 



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