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.
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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.
