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 d f is 3 inches long ; 
the cloaca, d e f globular, 1! inches 
in diameter ; the c cecum, c, single, as 
in the other Herons, 3 twelfths long, 
and nearly 2 twelfths in diameter. 
The trachea is 1 foot inches 
long, of nearly uniform diameter, 
flattened a little for about half its 
length, its greatest breadth 3i twelfths; 
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 laryngeal 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, Tapaya 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. Nutt all, 
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. 
