I(l8 A. OKA. 



their peri<^n><!fri(j fluid when taken out of the water. They assumed 

 that the fluid passed ont through pores in the endocyst, 1)nt they 

 searched in vain f(3r such communications. 



It is certain tliat when a polyj)ide retracts, a portion of the fluid 

 contained must of necessity pass ont at some place, since the cœnœcial 

 wall does not expand heyond a very limited extent. Notwithstand- 

 ing my s[)ecial attention to this point, Feet, (jelatinosa also gave no 

 resnlt, and I should ])refer to go no further than to assnme the 

 presence of external openings in connection with the excretory organs. 



4. Excretory Organ (P) 



Joliet (6), in a paper entitled " Organe segmentaire des Bryo- 

 zoaires Endoproctes," gives a pretty full description of two short 

 funnel-shaped tubes in PedicelUna and Loxosoina, first noticed by 

 Ilatschek. In the division Ectoprocta, however, our knowledge on 

 lhis sul)ject is vei-y limited. As far as I know, the two ngures given 

 In' Fai're, ;uid the remarks by Uincks and Smitt, both of whom do 

 not go beyond conforming the observation of the first, constitute the 

 wliole ])i])liography on this subject. Tliey all noticed a ciliated pipe 

 that opens between the mouth and the anns in AUijonidiiuii and Mem- 

 hranipora, hotli of which are gymnoliematous. In regard to the order 

 Phylactolcematn. if we except the short account given by Yerworn, 

 illustrated with two semi-diasframmatic fig-ures. there exists no litera- 

 ture known to me. Yerworn left the terminations of that organ 

 nudetermined, confining his attention t«^ <^iily ^^hc middle portion 

 where it is most conspicuous. Braem touches on this subject in 

 his note in the Zoologischer Anzeiger, but he too could not deter- 

 mine how the tubes terminate. Such beins: the case, I have 

 investigated this organ with s[)ecial attention. 



