26 



(h) A coil on tlie dorsal surface of tlie visceral mass 

 witliin tlic stomach coil (fig. 10, I/iL 2). The anterior 

 limh of this coil communicates with the end of a, and the 

 posterior limh with the posterior limh of c. 



(r) A small coil ventral to {a) (fig. 10, Inf. 3). Its 

 anterior limh passes, at the right anterior corner of the 

 visceral mass, into 



(J) a long coil (fig. 10, Inf. 4) which first passes over 

 the riffht anterior corner of the visceial mass and then 

 proceeds heneath the pericardium and around the 

 external horder of the stomach to ahout tlie niiddU> of 

 the right side, when it turns l)ark and foims 



(e) the last coil (fig. 10, //;/. -3), which is in close 

 contact with ((/) until it reaches the pericardium, Avlieu it 

 proceeds along the posterior edge of this to the animal's 

 right shoulder and opens on the anal papilla. The last 

 part of this coil (e) is the rectum. Its ventro-lateral wall 

 has two inwardly projecting ridges with a gutter hetween 

 them. The anus opens at the tip of the anal papilla 

 M-hich projects into the nuchal cavity on tlie right 

 shoulder (fig. 4). The walls of this projection are much 

 thickened, and its lining is papillated. The ventro- 

 lateral ridges of the rectal wall hecome more strongly 

 maiked as the walls thicken towards the anus (fig. ^1). 

 Judging from the condition in other (Gastropods it would 

 seem prohahle that the rectum once ran forward in or 

 near the median plane traversing the pericardium. The 

 shifting of the anus to the right side, and of tlie peri- 

 cardium to the left, has made the rectum lie across the 

 hody, and has pulled out the whole of the last coil of the 

 gut so that it now lies on the extreme outside of the 

 hump around the left side of the latter. 



II. The Large Glands of the Gut. — The Buccal 

 Glands (figs. 0, 15, 16) are four compound orange- 



