34. 



shows three Cfiroariae in which the several divisions of 

 the bladder as far a* worked out, agree with the bladder 

 of the oeroaria of ^oh ino a to ma revolutum. 



JPaust (1917 and 1918) describes four new species 

 of B chinos to raa cer<nrir\e, Qercar.ifrf-? trisolenata. Oernrxria 

 bjflexa. Per car ia ahiHolonata and CerQaria a can the sterna* 

 He shows parts of the excretory system of ench of these 

 species but in no one does he find a definite pattern 

 for the collecting tubules, ac^esory collecting tubules, 

 riep ^nd fln;ne cells* '!ven the part which 1 have 

 th*> crraplete bladder h<5 hi3 d^sorib<d Yery differ- 

 ently in his terms, the excretory system of the di gene tie 

 trematode is quite conservative* ^h^rever the excretory 

 system for 'Uff^rent rnecib^rs r,l the s-^c; family has been 

 TOri^d out a m^-rVea uniformity IB found* La88 (1894, 

 pi* VI II, tigs. II) .- 163) found two di?to:a0, Gj3J.stho- 



^.lyph^ rtjinae (^roelioh) and jiaploifletra qy lindri^oea (Zeder) 

 built on the*2 x G x :5* plan. Oort (1917) found four 

 folk- irij. led oeroaria, CeToa_rla do ut)ii t ti , Qer oa r i a 

 L Ge u roaria dou^laai and 3oh is to so ran 



with the fl-wne oells arising singly. This quite probably 

 mean?? that the exoretory system in the folk-tailed cer<ru:iae 

 is different in number of flam<* cells from the adults. iSaoh 

 flame <sell in tJie oeroariae probably represents a group of 

 flame oelle in the adult* Since the eohinostoiae family 

 is so uniform in regard to other eharacterts, it seems verj r 

 improbable th*t such ft conservative eyotem as the excretory 

 should vary greatly. Xhe eohinoatome excretory systems 

 described by JHust are almost entirely different from tliose 



