552 General Notes. [May, 
supposed that the liver-fluke had a somewhat similar life history; 
but all attempts to discover what mollusk served as intermediate 
The Cercaria had a tail, which, when fully extended, was more 
than twice the length of the body. It was exceedingly active, 
but soon came to rest, showing a strong tendency to encyst itse 
in surrounding objects. Mr. Thomas had a few months previously 
seen a sheep, which he had the best possible reason for knowing 
and it has since proved that such was the case. Moreover, 
collected evidence from independent sources, which rendered it 
bile into the intestines, and are distributed over the fields, à 
4 hed into 4 
the manure. If the eggs fall on wet ground or are wa 
t 
ditch, development continues, and after a time, the le 
i aie hatched out f 
which depends upon the temperature, embryos are 
the eggs. eee 
. For the purpose of his infection experiments Mr. Thor : 
tained eggs from the livers of affected sheep, and kep’ asferred : 
water until the embryos were hatched, and then upon | 
: z. i ‘mented | | 
them to vessels containing the snails to be exper the pur : 
After the embryos enter the snail, they best develop 
