AVIAN CESTODES. 439 



zerstreuen, in ganz reifen losgelosten Proglottiden in einem 

 parenchymatosen Pai^uterinorgan, das zu einer Uternskapsel 

 wird, vereinigen." I believe, however, that this definition was 

 made to include the species described in that memoir as Ghap- 

 mmiia longicirrhosa, a species which Fuhrmann later * trans- 

 ferred to the genus Idiogenes, and to the species I.flagellum. 



I have been quite unable to find a trace of anything like the 

 " Parenchymkapseln " of Davainea or any other genus in which 

 such structures exist. Nor do I think that it would be easy to 

 miss such bodies were they, at any rate, so conspicuous as in the 

 genera which are known to possess them (e. g., Inermicapsifer, etc.). 

 My figure is, as I think, decisive as to the direct entry of the ripe 

 ova into the paruterine organ ; in no other possible way can the 

 facts observed, and there represented, be explained. I can only 

 suggest that the irregular form of the uterus in ripe proglottids, 

 as I describe it later, may be responsible for the statement 

 that the eggs are separately envolved in parenchymatous 

 capsules before being pushed into the paruterine oi^gan. For in 

 many sections ova may be seen to lie apparently in closely fitting 

 capsules, these being in reality the expression of the I'amifying 

 branches of the uterus. Or it may be that both methods occur 

 in this species, or finally, there is the possibility, which I do not 

 consider to be very great, that the worm which I deal with in 

 the present communication is not Chapmania tauricollis but a 

 new form. 



The last word about the paruterine organ of this Cestode is 

 contained in Fuhniiann's account of Chapmania tapica f. Here 

 that author states that " Bei Chajmiania (audi bei Chap, tauri- 

 collis) geschieht dieser Uebertritt der Eier erst in abgelosten 

 Gliedern und ist deshalb von andern Autoren noch nie beobachtet 

 worden." It is clear, from my own observations, that the eo'o's 

 reach the paruterine organ at an earlier period. I think, however 

 that in my species, Otiditcenia eiijMdotidis, plainly belonging to 

 this subfamily, this late transference does occur. 



Systematic Position of Chapmania tauricollis and validity 

 of genus Chapmania. 



There is, of course, no need to argue the position of this tape- 

 worm so far as concerns its family and subfamily position. It is 

 clearly a member of the subfamily Idiogeninas of the family 

 Davaineidfe. 



This subfamily contains three genera, viz., Idiogenes, Chai)- 

 mania,Sp)hyronchotcenia,?indi very possibly my genus OtiditceniaX. 

 The most recent survey of the characters of the three former 



* Zool. Jahrb. t. cit. p. 50. 



t Swedish Exped. Egypt, pt. iii. p. 23. 



J See P. Z. S. 1912, p. 194, and ibid. 1914, p. 879. 



