METAMORPHOSES OF THE INTESTINAL WORMS. 465 
or the carnivora, as a manure in fields where alimentary 
grasses are grown, and especially if the plants are in a for- 
ward state. 
5th. To well cleanse these grasses before giving them to 
the animals, if taken from fields thus manured. 
6th. To prevent the use of the flesh of animals affected 
with worms, by making known to butchers and inspectors 
of cattle, the accidents to which the use of this food exposes 
them. 
7th. Not to allow this meat to be eaten, unless perfectly 
cooked. 
8th. Not to give it raw to dogs. 
[In continuation of this subject, we append from the 
pages of ‘The Annals of Natural History/ the following 
translation :] 
ON THE TRANSMISSION AND METAMORPHOSES OF THE 
INTESTINAL WORMS. BY MM. MILNE-EDWARDS AND 
VALENCIENNES. 
On the 30th April, 1855, M. Milne-Edwards communicated 
to the Academy of Sciences of Paris the results of some ex- 
periments made by M. Van Beneden, in the presence of MM. 
Valenciennes, De Quatrefages, Haime, and himself, in illus- 
tration of his views upon this interesting subject. The object 
of these experiments was to prove the transformation of the 
cysticercus pisiformis of the rabbit into the tamia serrata when 
introduced into the intestines of the dog ; and they appear to 
have been perfectly satisfactory to all the members of the 
commission with the exception of M. Valenciennes, whose 
observations upon these phenomena follow 7 those of M. Milne- 
Edwards. 
The tcenia serrata is exceedingly common in adult dogs, 
but is not found in these animals when very young. In his 
first experiment, M. Van Beneden used two newly-born 
puppies, and brought them up under exactly the same con- 
ditions, except that to one of them a certain number of 
cysticerci were administered in his food, whilst these worms 
were carefnlly kept from the second. The cysticerci were 
administered at three different times ; viz., on the 12th and 
23d of March, and on the 21st April. These dogs were 
killed and opened on the 25th April, when the animal which 
had eaten no cysticerci was quite free from the tcenia serrata , 
although the lower part of its intestines contained a single 
