WORMS. 413 
the vessels of the kidney, as when suppuration has taken place 
round it the worm has been found of a 
whitish hue.” In the human kidney 
it has been known to attain the length 
of three feet, with a diameter of half 
aninch. “The head (a) is obtuse, the 
mouth orbicular and surrounded by six 
hemispherical papille (a); the body is 
slightly impressed with circular strie, 
and with two longitudinal impressions ; 
the tail is incurved in the male, and 
terminated by a dilated point or bursa 
(B), from the base of which the single 
intromittent spiculum (0) projects. In 
the female the caudal extremity is less 
attenuated and straighter, with the 
anus (C) a little below the apex.” 
(Cyclopedia of Anatomy, art. Entozoa.) 
I have been thus particular in insert- 
ing descriptions of these worms, be- 
cause I find that the study of their 
natural -history is becoming more 
general; and as there is a large field 
for the microscopic inquirer, it is well 
to have a good ground to start from. 
The generation of parasites is at all 
times of great interest, but, with refer- 
ence to the Entozoa, there is so much 
still unknown, that the natural his- | 
torian who would be able to throw \ 
light on this branch of his favourite 
study would deserve the thanks of 
those who, while they take an equal 
interest in it with himself, have not the 
opportunity, or perhaps the industry, ——— 
which he possesses. Fig. 6. 
The symptoms of the presence of 
worms in the dog should be carefully noted and anxiously looked 
