590 DR. F. E. BEDtoARD ON 



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 hfematoxylin, 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 pamterine organs of this species resemble those of the 

 species which I described as Thysanotcenia *. 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 oi'gans 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 ga7nbiana. 



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 resum6, Ransom defines 

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

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

 Thysanosominse is defined by the presence {intei^ alia) of numerous 

 paruterine 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 geneiic name Thysanotmnia. 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 Otiditmnia %, that the fate of 

 the viterus in Zschokkeella might be like that of Otiditce^iia. 

 No figures are given by Fahrmann in his account of Zschokkeella 

 linstovn§ which illustrate this particular point, and the only 

 reference to the matter is the assertion that the eggs are 

 surrounded by a " Parenchymhlille." 



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



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



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



II Loc. cit. p. 393. 



