236 



ELEMENTS OF HISTOLOGY, [chap. xxx. 



with a spherical nucleus. These cells commence gene- 

 rally at the neck, but in some animals e.g., in the 



Fig. 135. From a Vertical Section through the Kidney of Dog, showing 

 part of the Labyrinth and the adjoining Medullary Eay. 



a, The capsule of Bowman; the capillaries of the glomerulus are arranged in 

 lobules ; n, neck of capsule ; 6, irregular tubule ; c, proximal convoluted 

 tubules ; d, a collecting tube ; e, part of the spiral tubule ; /, portion of the 

 ascending limb of Henle's loop-tube ; d, e, f form the medullary ray. 

 (Atlas.) 



mouse they already have begun in the Malpighian 

 corpuscle. The outer part of the cell protoplasm i.e., 



