ON PLANTS IN RELATION TO ANIMALS. 
683 
Australia .—Pleuro-pneumonia is now the most predomi¬ 
nant disease, not only in New South Wales, but also in all 
the other Australian colonies. It was introduced into this 
remote corner of the world, so rich in pastures, in 1858, by 
an English cow disembarked at Melbourne. She died of 
pleuro-pneumonia six weeks after arrival, which proves the 
extreme length of incubation of this disorder, for the journey 
from England to Australia by a sailing-vessel lakes about 
three months. A similar fact was shown when this disease 
was introduced into the Cape of Good Hope by a Dutch 
cow. Mr. Bruce’s researches on the prevalence of this 
disorder in the colonies, and the value of inoculation, are 
then given. Thus, the first part of Dr. Willems’ paper is 
of considerable interest, giving us an admirable one-sided 
view of the important question it treats of. His information 
with regard to England, as given above, is evidently second¬ 
hand, and open to question ; nevertheless, we may look 
forward with interest to the other part of his paper, which 
contains something new to science. This we will endeavour 
to place before our readers in the next synopsis. 
ON PLANTS IN RELATION TO ANIMALS. 
By Professor James Buckman, F.G.S., F.L.S., &c. 
[Continued from p. 540.) 
Continuing our history of the agricultural Clovers, we 
come now to the consideration of two species, as follows : 
Trifolium incarnatum .—Carnation Clover. Flowers a 
bright carnation pink (some¬ 
times white), in spicate heads. 
Leaflets inclining to spathu- 
late. Stipules with pink 
blotches. 
,, hybridum .—Alsike Clover. Flowers pink¬ 
ish white, in rounded heads ; 
older heads brown by reason 
of the dried persistent corolla. 
Leaflets ovate. 
These two plants are both considered of foreign origin, 
though there is reason to think that they are derivatives 
from the cultivation of native sorts. r lhe crimson clover has 
for many years been cultivated on the Continent, and there 
