24. 



nearly up to the ventral suoker. In the region of the 

 acetabulum the ceiling ot the muscular tubes of the body 

 (lo) largely oeasers, and from there to the region of the 

 pharynx the tubular descending **. vision of the bladder 

 widen considerably. Inside of these tubes are to be 

 found many prominent opaque concretions* T&is part is 



njf ? 



non-muscular and is thus quite distinct from the muscular 



4 



tubes f the bladder (Ic) and so is designated (id), the 

 concretions are small at the anterior end becoming larger 

 and larger until the region of the forcing of the intestine 

 is reached when -xgain they gradually become smaller* These 

 concretions I believe to ba gradually and continuously 

 formed from the waste liquid, enlarging as they art pushed 

 farther down the oonfiretional tubee6f the bladder (i i'J . 

 Why they again decrease in size, I cannot determine, but 

 th^t they do is certain and that wastes pass out only in 

 liquid conditioh is almost equally certain. Svidentally the 

 concretions are produced about as fast ^s dissolved and 

 eliminated since I have never seen an active ceroaria without 

 these concretions filling this entire part of the bladder. 

 In the region of the anterior end of the pharynx these 

 tubular divisions of the bladder turn completely around 

 forming a very characterietic area (fig. 47, t.a. ). Here 

 the ascending tubes of the bladder (le) join the cone ret ional 

 tubes of the bladder (id). The difference between these two 

 divisions of the bladder is apparently only physiological, 

 i.e., in terms of the presence or absence of concretions 

 and the diameter of the tubes. These latter divisions as 



