‘a 
. 
Vig. 1 Respiratory epithelium. Diemyctylus japonicus. Silver impregnation. Surface view. 
X< 350. 
Fig. 2. Respiratory epithelium. Rana nigromaculata. Silver impregnation. Surface view. 
x 350. 
Vig. 3 Respiratory epithelium. Megalobatrachus japonicus. Silver impregnation. Surface 
view. X 350.° 
Vig. 4 Respiratory epithelium. Clemmys japonicus. Silver impregnation. Surface view. 
x 390. 
336 
