136 



TWELFTH LECTURE. 



j Jm . 



tained in infinite numbers in the gastric mucous membrane, 

 and examine a so-called " peptic-gastric gland " (it may also, 

 it is true, be somewhat more complicated), 

 we readily recognize from d to b the secre- 

 tory cells. Over b we meet with a cylindri- 

 cal epithelium, the same which covers the 

 surface of the gastric mucous membrane. 

 A further explanation is, therefore, super- 

 fluous. 



Let us, furthermore, cast a glance back to 

 our Fig. 122. The drawing represents a so- 

 called "gastric-mucous gland." A long, 



a 



m 



Fig. 127. — The vascular net work of the rabbit's pancreas. 



Fig. 128. — A lateral 

 view ol a gastric glnnd 

 of the cat ; a. stomach 

 cells : b, inner ; r, ex- 

 ternal inierca'ary por- 

 tion ; d, the g an<l tube, 

 with both varieties of 

 cells. 



excretory duct bears the same cylinder cells (a). It then 

 divides into two caecal tubes. These (b) contain lower 

 cubical elements, the suppliers of a tolerably unknown secre- 

 tion. 



Let us examine a still earlier figure — our Fig. 120 — the 

 small racemose glands. No doubt can prevail here concern- 



