TRANSACTIONS OF MICROSCOPICAL SOCIETY. 
DESCRIPTION or PLATE I, 
Illur^trating Mr, Wliitney^s paper on the Circulation in the 
Tadpole. 
Figs. 1, 2, and 3. 
A. — The heart, the ventricniar portion. 
B. — Truncus arteriosus, 
c— Pericardium. 
I). — The lung. 
E. — The cephalic artery. 
F. — The labial artery. 
G. — The labial vein. 
7T. — The pulmonary artery. 
T. — The aorta, 
K. — The caudal artery. 
L. — The caudal vein. 
M. — The kidney. 
— The vena cava. 
0. — The liver, 
p. — The vena porta, 
Q, — Sinus venosus, or auricle. 
11. — The jugular vein, 
s. — The large transverse muscle. 
T, — Abdominal vein, 
u. — Abdominal veins. 
V. — Pulmonary vein. 
