138 



GREAT AMERICAN WHITE EGRET. 



intestine is very long and extremely 

 slender, measuring 6 feet 7 inches in 

 length, its average diameter 2 twelfths. 

 The rectum, b df, is 3 inches long; 

 the cloaca, d ef, globular, 1^ inches 

 in diameter; the ccecum, c, single, as 

 in the other Herons, 3 twelfths long, 

 and nearly 2 twelfths in diameter. 



The trachea is 1 foot 9i inches 

 long, of nearly uniform diameter, 

 flattened a little for about half its 

 length, its greatest breadth 3jtwelfths; 

 the rings 285, the last four rings 

 divided and arched. The contractor 

 muscles are extremely thin, the 

 sterno-tracheal moderate, and coming 

 off at the distance of 1 inch from the 

 lower extremity, from which place 

 also there proceeds to the two last 

 rings a pair of slender inferior laryn- 

 geal muscles. The bronchi are very 

 short, of about two half rings. 



Tapayaxin. 



The animal represented on the plate is the Tapayaxin of Hernandez, 

 Phrynosoma orbicularis of Wiegmann, Tap ay a orbicularis of Cuvier. 

 The specimen from which it was drawn was entrusted to my care by my 

 friend Richard Harlan, M. D., to whom it was presented by Mr. Nuttall, 

 who found it in California. A notice respecting this species by Dr. Harlan 

 will be found in the American Journal of Science and Arts, vol. xxxi. 



