C. L. Walton 
213 
Echinococcus veterinorum Sieb. 
(Taenia echinococcus). 
Cysts were obtained from the liver of a sheep that also contained 
a number of specimens of D. hepaticum. 
Tape Worms of Sheep and Lambs. 
Soon after the commencement of the Survey, a farmer from the 
neighbourhood of Aberystwyth complained that his lambs had not 
“done” well in the previous year, and judging by his description I be¬ 
lieved tape worms were the cause. Enquiries at slaughter houses etc. 
elicited the information that these parasites were exceedingly abundant 
in a number of flocks within the Area, and that the farm above mentioned 
was heavily Infected. 
To have followed out all the details of this matter would have in¬ 
volved the expenditure of more time than could be spared from the 
other survey work, and Mr F. W. Flattely, then a research student in 
the Zoology Department of the University, commenced a careful study 
of the worms etc,, using chiefly the farm already cited. Very promising 
and interesting results were being obtained when Mr Flattely left to 
take up a post under the International Institute of Agriculture, Rome, 
where he has, as far as possible, continued the study of Moniezia. 
A good deal of material was collected from local slaughter houses, 
and from ewes and lambs that had died, and Mr Flattely, before he 
left, had obtained two species of Moniezia which he subsequently 
identified as M. expansa and M. trigonophora, and he also proved that 
both these species may occur in the same lamb. 
To determine the relative distribution of these two forms in the 
Area would be a troublesome matter, and the close study of these pests 
would entail a separate and careful research. 
Mr Flattely obtained as many as seventy-five individuals from a 
single lamb, and there is no doubt that these worms are the cause of 
a considerable loss to local farmers, especially those who feed lambs 
for the butcher. Ewes are also affected to some extent. 
I continued to make inquiries and observations and obtained pro¬ 
glottides from droppings at a number of places in the Area from April 
to June, and gained a list of a dozen farms where the worms had been 
noted. 
