GENERAL ANATOMY OF THE SQUTD. 



347 



e. The oesophagus may be traced forwards on the left 

 side of the body to a point just in front of the spleen, 

 where it enters the liver (Figs. 180 and 181, b). 



f. The anterior 

 aorta (Fig. 180, s), 

 will be seen to follow 

 the same course, and 

 to pass into the liver. 



g. Carefully raise 

 up the liver (Figs. 

 180 and 181, h), and 

 notice that the oeso- 

 phagus (Fig. 181, c) 

 and aorta (Fig. 181 , fZ) 

 pass entirely through 

 it, and run forwards 

 on its lower surface 

 to the head. 



A. On the dorsal 

 surface of the anterior 

 end of the liver are a 

 pair of small, com- 

 pact, white glands, 

 the posterior salivary 

 glands, in contact with 

 each other on the mid- 

 dle line. Their ducts 

 pass into the head 

 alongside the oesopha- 

 gus, and they will be 

 noticed in the descrip- fu.. i8i. 



tion of the head. ^^' ^^^* — l>orsal view of the digestive 

 -n . .J. organs of Loligo Pealli. (Drawn from na- 



Bunmng out from ^ure by W. K. Looks.) 

 under them, notice For explanation of letters see Fig. 180. 



