47 



ganglion, bnt internal to the neurilemma of this ganglion, 

 i.e., between the neurilemma and the ganglionic 

 substance, and then divides into three branches. One of 

 these supplies the anterior salivary gland (PL VI, fig. 50, 

 S. A.), the anterior branch supplies the anterior lateral 

 wall of the buccal mass, and a third branch runs 

 ventrally, to supply the ventral posterior portion of the 

 buccal mass (fig. 50, B ± A ± , B. A.). Small arteries 

 accompany several of the nerves given off by the sub- 

 ( (esophageal ganglion. Anterior to the salivary and 

 pharyngeal arteries a second branch is given off which 

 divides into several arteries: — (1) an artery giving off a 

 branch to the funnel (fig. 42, F. A.), and then running 

 down on the inner side of the visceral envelope, to end 

 there by splitting up into many smaller branches (fig. 42, 

 V. E. A.) ; (2) a branch which follows the course of the 

 accessory pallia! nerve, and so supplies the muscles of the 

 head, and the lateral chamber of the funnel ; (3) a branch 

 to the eye (fig. 42, . A.) ; and (4) a short branch running 

 inwards to the statocyst. The next branch given off by 

 these forks is a second artery to the eye (fig. 42, O. A.). 

 A second very fine branch to the anterior part of the 

 funnel is the last branch given off by the two forks of this 

 aorta (fig. 42, F x AA. 



The Abdominal Aorta is much more slender and less 

 important than the anterior aorta. It arises anteriorly 

 from the ventral wall of the left chamber of the heart, 

 and runs forwards and ventrally. Soon after its origin it 

 gives off a left and right branchial artery. Each of these 

 runs transversely across to the corresponding gill, just 

 dorsal to the kidney sac, and ventral to the auricles 

 (fig. 42, Bl. A.). Further along, the abdominal aorta 

 gives off the artery of the ink sac, which runs inwards 

 and forwards to the base of that organ, giving off two 



