294 OTT. [Vol. Vll. 



resemble globules of mucus. Some of the bodies of the organs 

 take a much darker stain than others. Small light spaces may 

 be seen among these bodies. No nuclei were seen. No pigment 

 is visible in these organs in either the living worm or in the 

 sections. 



According to Graff {'82, p. 116) Leuckart, in 1853, found 

 these organs to be connected by a short nerve with the lateral 

 nerves. Schneider, in 1873, found the organs directly connected 

 with the brain by a short nerve, and also described them as 

 hollow transparent spheres whose inner surface was covered 

 with smaller spheres. 



Graff ('75, p. 414) found them to be dish-shaped organs which 

 are made up of small refractive globules, and stated that they 

 are seen either in the face or in profile, according to the state 

 of contraction of the worm. 



Reproduction. 



In my study of the worm no trace of sexual organs has been 

 seen. 



The asexual reproduction is accomplished by a continual 

 lengthening of the worm and a separating of buds from the 

 posterior end of the body. Often more than one bud is present. 

 Worms which have more than two buds are extremely rare, 

 while those with two buds are often seen. The majority of 

 worms have but a single bud, and worms which have no bud at 

 all are nearly as plentiful. 



The size of the worm when it begins to bud is different in 

 different individuals. Sometimes a single worm is as long as a 

 worm together with its first bud. The first bud is marked off a 

 little back of the middle of the body so as to include a little 

 more than the posterior one-third of the worm. When this bud 

 is well developed a new bud may be seen forming between it 

 and the anterior end of the intestine of the mother. When 

 there are two buds the anterior bud is always much smaller 

 than either the mother or other bud. In no instance was the 

 bud seen to be forming a new bud while it was in connection 

 with the mother. The worm always divides into two parts. The 

 large posterior bud generally separates from the rest of the 



