Fig. 2. Partially solidified (A) and inflated (B) lungs in two giant X. laevis tadpoles seen in situ in ventral view. The majority (68%) of giant tadpoles have small and partially solidified lungs as shown in A. The alimentary tract and associated organs have been removed. Lung sacs are outlined with a white dotted line. L, lung sac; H, heart; K, kidney; S, skin flap; HL, hind limbs. Scale bars, 0.2 cm.