20 DR. F. E. BEDDARD ON 
calcareous corpuscle, is excentric. This is pointed out by Benham * 
and in the investigations of v. Janicki upon the development of 
these bodies in the genus Davainea + On the other hand, it is 
to be admitted that Lénnberg = found the nuclei to be often 
centric as well as excentric in the Bothriocephalid Abothriwm 
rugosum. There are, however, two strong arguments in favour 
of regarding these bodies as calcareous bodies: these are, first, 
that they bubble with gas on being treated with dilute hydro- 
chloric acid; and, secondly, that I have found in this second 
example of the worm rudiments of the real generative organs. 
Text-figure 9. 
Part ot a transverse section through sexual form of Urocystidiwm gemmiparwmn. 
n. Nerve-cord. ¢.m. Transverse muscles. w.d. Dorsal water-vascular tube. 
w.v. Ventral ditto. The medulla is crowded with darkly stained calcareous bodies 
The second argument is I think conclusive as against the view 
that the bodies in question are eggs. The reproductive organs 
* ©A Treatise on Hashes; Oxford, pt. iv. p: 107 (1901 
+ Arch. de Paras. t. vi. 1902, p. 261. ? . 
+ K. Svensk, Vet.-Ak. Handl. Bd, 24, 1891, p. 78, pl. i. fig. 5, 
