XXV] KIDNEY 201 



distended position ; in an hour to a day sections are cut and 

 exposed to light. 



Kidney of newt. If the anterior part of the kidney of a newt 

 be cut out and examined in salt solution, the cilia of the funnels 

 will be seen in movement. (They open into the neck of the 

 capsule in the newt, into the roots of the vena cava inferior in 

 the frog.) 



Good preparations of frog's or newt's kidney may be obtained 

 by hardening in Flemming's fluid and staining with Mallory's 

 triple stain (p. 311). 



Kidney of snake. In the kidney of the grass snake (osmic 

 acid), large tubes will be seen, having very large granules 

 throughout. (They occur at the end of the second secretory 

 portion.) 



L I B R A F 



fa 



