Lymphatics in Small Intestine of the Pig. 



115 



^. 



Fig. 15. — Thick section from the same specimen as Fig. 14, to show the 

 exact position of the two plexuses. 



the intestine of a pig 16 cm. long. Here the characteristics of the 

 adult system are all laid down. 



In the gross specimen of Fig. 14, the characteristic submucosal 

 plexus is well seen. The vessels are no longer capillaries, but are 

 collecting trunks, as shown by their size and the obvious valves. 

 The well known "collarettes" indicate the position of these valves. 



