REMOVAL OF PRONEPHROS OF AMBLYSTOMA 
367 
In bilaterally operated Amblystoma larvae, the swelling which 
first appeared in the region of the wounds progressed gradually 
forward, the pericardial cavity soon becoming enlarged (figs. 7 
Figs. 7 and 8 Section and entire sketch of embryo, from which both kidneys 
had been removed, to show pericardial effusion. Figure 7, section through peri- 
cardial (p.f.) region. Figure 8, camera drawing of embryo, showing swelling in 
the heart region. 
Fig. 9 Section through an embryo from which both kidneys had been removed. 
Both glomeruli (gl) are present, extending out into the enlarged coelomic cavities 
(c); A, aorta. 
and 8). Later the fluid caused a pronounced distention of the 
abdominal cavities (fig. 9), and in extreme cases the gills also 
became swollen and distorted. Slowing or entire absence of 
circulation accompanied this condition and sloughing of the 
