Fig. 2g. — A tatled frog, near the close of the metamor- 

 phosis. DISSECTED FROM THE VENTRAL SURVACE TO SHOW THE KID- 

 NEYS AND REPRODUCTIVE ORGANS. X 4- (After Marshall.) 



A, dorsal aorta, F, fat body. G Jif^ glomerulus. /C/J, archinephric or 

 segmental duct. A' J/, Wolffian body. A'P, head-kidney, disappearing. A' i/, 

 ureter. O, mouth. OJi, genual ridge. J^ l\ tip of ventricle. TO, cesophagus, 

 cut short. 



80 



