25. 



stated are the ascending tubes of the bladder ie). Those 

 divisions of the bladder pass ventral tc the ccnoreticnal 

 tubes cf the body (id), at the anterior end but lator dome 

 to 41 e on the outfU -ie cf and parallel to it. In the region 

 of the posterior end of the ventral sucVer* a col lent ing 

 tubule (2a), joina the nscending tubes of the bladder 

 (le)i *his collecting tubule is joined shortly by a 

 bulb-liVe accessory collecting tubule (3c), into which three 

 c-ipillri ri*s enter that drain the wastes by means of three 



,'ae cells from the reg on of the aietabulunu A ehort 

 dint.-anoe anteriorly three ether capillaries jcin tlnig 

 collecting tubule (Sa). These capillaries unite singly 

 some distance auvrt, to the oollectincs' tubule* However, 

 we might consider that th<? rart cf th? tubule between 

 oapill aries 4x and 6x repreonte the accessory collecting 

 tubule (3b) This s^^sms provable because th^ acce^Bcry 

 oollectin ; tubule (3fc)t is reduced to a more bulb and even 

 h*re the capillaries <io not jrin txactly at one place* At 

 the anterior end of the collecting tubule (2a), three other 

 capillaries are received which drain tho wastes from the 

 oregicn. h^re again the aeo^*sory oollectin^; tubule 



(3a), has either ooaoed tc be r r it exists as Uie tubule 



. 

 between flouae cells two and thrse* In this latter group 



capillaries are even farther apart than the ones 

 forming the group jurt preceding. This loss or modification 

 of the accessory collecting tubules 3a and 3b is shown 

 graphically by comparing text figure No. 1 -*ith figure 47, 



