CH. XXXVI.] 



THE KIDNEY. 



533 



Fig. 420. From a vertical section through the kidney of a dog -the capsule of which is 

 supposed to be on the right, a, the capillaries of the M'llpightan corpuscle, which are 

 arranged in lobules ; n, neck of capsule ; c, convoluted tubes cut in various directions ; 

 b, zigzag tubule ; d, e, and /'. are straight tubes in a m-- iullary ray ; d, collecting tube ; 

 e, spiral tube ; /, narrow ruction of ascending limb, x 380. ( Klein and Noble Smith.) 



/ 



Fig. 421. Transverse section of a renal papil.ir ; a, largo tubes or ducts of Bellini; 

 b, c, and d, smaller tubes of Henle ; r, f, blood capillaries, distinguished by their flatter 

 epithelium. (Ca.liat.) 



