THE PRINCIPLES OE BOTANY. 
841 
Alga, from the mouth and pharynx. 
A. Leptothix huccalis, from the tongue. 
B. Specimen in diphtheritic exudation,— 
The above figures are from Harley and Brown’s ^ Micro¬ 
scopic Anatomy ’ before cited, and they are valuable as 
showing bow common these are in different secretions, both 
in healthy and diseased subjects, and how much they appear 
to he alike under both conditions; at the same time it must 
he recollected that these inquiries are as yet quite in their 
infancy; with greater knowledge of these appearances as they 
arise in man and the inferior animals, it is just possible that 
minute specific details may he present, so as ultimately to 
enable us to detect differences in health and disease. 
We are informed that plants of these lower tribes were 
constantly found in the mucus of the intestines and stomach 
of cattle in the time of the cattle plague ; but then it may 
also he stated that, as yet, little can he gathered in the way 
of evidence of diseased action, when either the same forms or 
