gid” in lambs. 547 
and to which, such Animals were brought, and the mode in 
which such Animals have been disposed of. 
Foreign 
ports from 
Ports in 
Great Britain 
Disease. 
Number of Animals afeected. 
Disposal. 
which 
brought. 
to which 
brought. 
Cattle. 
Sheep. 
Goats. 
Swine. 
Total. 
Slaughtered at 
place of landing. 
Hamburg 
London 
Pleuro- 
pneu- 
monia 
1 
1 
1 
Lisboa 
Southamp- 
ton 
Foot-and- 
mouth 
17 
17 
17 
Total 
• 
18 
... 
... 
18 
18 
“ ALEXANDER WILLIAMS, 
“ Privy Council Office, Secretary. 
“ Veterinary Department, 13th July, 1871.” 
“ GID” IN LAMBS— HYDATIDO-CEPHALUS. 
Mr. George Drew, M.R.C.V.S., Abingdon, has called 
our attention to an extensive and somewhat extraordinary 
outbreak of “ gid 55 among a flock of valuable lambs. A 
short time ago many of the animals gave indications of 
cerebral disturbance by the ordinary symptoms of vertigo, 
giddiness, &c. About a dozen soon fell a sacrifice to the 
disease, and between thirty and forty are now affected. We 
have not unfrequently met with a similar occurrence, and 
have sometimes known as many as thirty-five per cent, of the 
entire flock to be ultimately lost. 
The existence of the brain-hydatid is now well known to 
depend on the matured ova of the Taenia ccenurus of the dog 
being received into the digestive organs of the sheep, and 
the young hooked embryos, on making their escape from the 
ova, finding their way to the brain, and in this their habitat 
developing into the polycephalous hydatid ( Ccenurus cere - 
bralis). The so-called heads of this hydatid are in reality 
larval tape-worms, so that when the hydatid in its turn enters 
the stomach and intestines of the dog, tape-worms are pro- 
duced in proportion to the number of heads which are retained 
within the digestive canal of this animal. 
In conjunction with Dr. Cobbold, we, in the year 1865, 
