590 DR. F. E. BEDbARl) OJ? 



to assume that they have got directly to their situation from the 

 ovary (see text-fig. 76), The lax parenchymal tissue, the mesh- 

 work of which is filled with a substance plainly visible as granular 

 matter after staining with Ehrlich's hsematoxylin, but not to be 

 seen after staining with borax carmine, can offer little obstacle 

 to the immigration of eggs ; so that in any case some of the 

 paruterine organs aie without vestiges of an uterine cavity. 

 I believe, as a matter of fact, that all are so, and that there is 

 no persistent uterus in this worm. 



The paruterine organs of this species resemble those of the 

 species which I described as Thysanotamia *. At the time when 

 that description was written, I believe that Janicki's careful 

 account of the genus Inermicapsifer with similar egg-capsules 

 had not actually appeared. I had not realised from the descrip- 

 tions of Zschokkeella that the organs containing the ripe eggs 

 were doubtless of the same structure, I had considered that 

 those organs probably resembled the figure given by Ransom t, 

 not entirely grasping the fact that that figure was intended rather 

 as a diagram to distinguish between those species of Davainea 

 which had several eggs enclosed in one capsule and those species 

 in which each capsule had within it but one egg. I was thus 

 misled, though not through Mr, Ransom's fault. There was, of 

 course, no other genus with which I could directly compare 

 Thysanotcenia gambiana. 



In defining the genus Zschokkeella, Ransom speaks of the fate 

 of the uterus in the following words : — " Uterus early breaks 

 down into egg-capsules." Earlier in his resume, Ransom defines 

 the subfamily Linstowinae in the same way ; he remarks that the 

 " uterus breaks down into egg-capsules," As the subfamily 

 Thysanosominse is defined by the presence {inter alia) of numerous 

 parutei-ine organs, I thought myself justified in placing my genus, 

 as I regarded it, in the latter subfamily and marked its affinities 

 by the use of the generic name Thysanotoinia. I was indeed of 

 opinion that the uterus in Zschokkeella really persisted in separate 

 pieces, each containing so many eggs. It appeared to me, in fact, 

 after studying a tapeworm which I have lately described in the 

 * Proceedings ' of this Society as Oticlitmnia J, that the fate of 

 the uterus in Zschokkeella might be like that of Otiditcenia. 

 No figures are given by Fuhrmann in his account of Zschokkeella 

 linstowi^ which illustrate this particular point, and the only 

 reference to the matter is the assertion that the eggs are 

 surrounded by a " Parenchymhiille." 



Janicki || , however, is apparently of my earlier opinion ; 

 for, in distinguishing between the genus Zschokkeella (written, 

 as originally — Zschokkea) of Fuhrmann and his own genus 



* P.Z.S. 1911, p. 1001. 



t Hull. U.S. Nat. Mus. No. 69, 1909, p. 17, fig. 8. 



j P. Z. S. 1912, p. 194. 



§ Centralbl. f. Bakt. u. Paras. Bd. xxxii, (1902). 



II Loc. cit. p. 393. 



