158 PROFESSOR MARSHALL AND EDWARD J. BLES. 



Fig. 8, The dorsal portion of a transverse section through a 40 mm. 

 male tadpole, passing through the fat-bodies and the 

 archinephric ducts. The section is taken at the level 

 indicated by the line a a in Fig. 1 : ( x 28). 



Fig. 9. The dorsal portion of a transverse section through the same 

 tadpole as Fig. 8, passing through the genital ridges and 

 the Wolffian bodies ) on each side a nephrostomial 

 tubule is shown. The section is taken along the line b b 

 in Fig. 1 : (x 28). 



