TWO AQUATIC OLIGOCH^TES. 15 



" Two pairs of septal glands perhaps continuations of the cœlomic 

 epithelium, are attached to the posterior faces of septa VII/VIII 

 and VIII/IX, on either side of the median line. The form and 

 size of their cells are closely similar to those of the peritoneal 

 cells. These cells are aggregated around one axis." This descrip- 

 tion recalls to one's mind, with some uncertainty, the septal sacs 

 which are found attached to the posterior faces of septa V/VI- 

 IX/X ; but the following statements do not apply to the organs 

 observed by me. " The axis is a continuation of the peritoneum 

 and originates a little in front of the ventral seta? and is in the 

 same longitudinal line with the latter." The septal sacs may 

 possibly be described as lying in the same longitudinal line with 

 the seta-bundles, but it never extends so far as to lie close to 

 the seta3, and moreover no other similar organs are to be found in 

 segment IX. I entertain the opinion that the organs described 

 by Hatai may possibly be the anterior nephridia. In that case 

 the numbers of the septa must be misprints. 



In the body cavity lie amœbocytes, attached to the intestinal 

 wall or to the peritoneum of the body wall. Each amcebocyte is 

 a multinucleated, naked mass of cytoplasm of irregular shape, 

 sometimes sending out pseudopodia-like processes. They are also 

 often found floating free in the cœlom, and are then always 

 rounded in form. The cytoplasm of the amœbocytes is more or 

 less granular like that of the bottom cells of the septal sacs and 

 the neoblasts. The nuclei of the amœbocytes are not always 

 nucleolated. 



" Chloragogue granules," says Kice in his paper on Lumbricus 

 herculeus, " are found free in the cœlomic fluid. They are found 



imbedded in leucocyte bodies. Lastly they are found 



in the muscular tissue of the outer body wall, dorsally and 

 ventrally : on the dorsal aspect, for the most part as diffuse 

 granular masses distributed throughout the circular muscular 

 layer ; on the ventral aspect in more compact masses in the 

 vicinity of the setse." Something similar may also be seen in 

 L. gotoi, but I have grave doubt about the identity of the cœlomic 

 and chloragogue granules. The ground for this doubt lies in the 



