POLYGYRA ALBOLABRIS AND LIMAX MAXIMUS 265 



hermaphroditic duct, stomach, ovotestis and albumen gland; the 

 other and larger of the two proceeds anteriorly, supplying the 

 remaining organs of generation, muscles, crop and all the organs 

 contained in the foot. 



The posterior aorta passes on the outer part of the inferior lobe 

 of the digestive gland, giving off numerous branches to this gland, 

 the intestine and al«so to the albumen gland. Just after giving off 

 this latter branch, it crosses a portion of the stomach, and for a 

 short distance disappears in the substance of the lobe of the diges- 

 tive gland; then emerging it continues along the lower inside edge 

 of the volution to the apex of the animal, giving off branches to 

 the superior lobe of the digestive gland, and to each of the fasci- 

 culi of ceca composing the ovotestis. 



The anterior aorta, at a short distance from the heart, gives off 

 a branch to the stomach. On the stomach this branch subdivides 

 into two branches; each of which gives off numerous branches, 

 covering the stomach with their ramifications. This artery, before 

 reaching the stomach, gives off a branch, which continues to the 

 hermaphroditic duct. 



At a short distance from the branch to the stomach is a large 

 branch, which continues on the surface of the prostate gland and 

 uterine canal, giving off numerous small branches to these organs. 



At a short distance beyond this branch is another, which shortly 

 subdivides; the larger of the two divisions continuing to the mus- 

 cular collar, and supplying blood to it, and to the adjacent parts. 

 The smaller of the two divisions continues with the retractor mus- 

 cles of the foot. From the larger of the two subdivisions a branch 

 is given off, which continues to the crop, supplying the crop and 

 the overlying salivary glands. A small branch continues with 

 each salivary duct to the buccal body. 



The main aorta continues, without branching, to the infra- 

 esophageal ganglia, where it suddenly turns downward and back- 

 ward, continuing posteriorly in the base of the foot. .lust at 

 the turn it gives off three branches, which proceed directly 

 anteriorly; the central and largest of which supplies the buccal 

 body. The two lateral ones, which are very minute, proceed 



