THE 
VETERINARIAN. 
VOL. XXXVII. 
No.437. 
MAY, 1864. 
Fourth Series. 
No. 113. 
Communications and Cases. 
NOTE FROM PROFESSOR YARNELL. 
Gentlemen, — May I request the insertion of the follow¬ 
ing communication in the next number of your Journal ? 
I am, &c., 
George Yarnell. 
To the Editors of ‘ The Veterinarian .* 
An important oversight on my part occurred in my exami¬ 
nation of a portion of the intestine of a colt, sent to me by Mr. 
R. Littler, Y.S., and published in the last number of the 
Veterinarian. This error would very likely have remained 
uncorrected for some time had not Mr. Littler himself noticed 
it. On repeating my investigation of a small portion of the 
intestines which, with other parts, I had fortunately pre¬ 
served, I find that the numerous dark points, alluded to by 
me as studding the mucous membrane, instead of being 
simply “ blood spots,” the majority of them contained young 
worms in various stages of growth. It is true, however, that, 
as far even as my second investigation has gone, I find that in 
some of these spots no entozoa exist. It therefore must 
have been some of those that I had accidentally examined 
at first, and thus concluded that they were all alike. I think 
this must have been the way the error occurred; for the 
greater part of the worms in these spots were so far advanced 
in growth as to be detected even with a moderately low mag¬ 
nifying power. 
XXXVII. 
18 
