MISCELLANEA. 
659 
collar, and the ropes by which he was confined, and it seemed as 
if he would have had the beam and the very house down. He 
was therefore released from all his shackles. 
Two hours afterwards he was evidently better, and had been 
amusing himself by trotting about. He has had two or three 
evacuations, but he does not eat quite so well as usual. Let him 
alone and watch him. 
20th . — Apparently well. 
FlLARIiE IN THE BLOOD OF A LIVING Dog. 
By MM. Gruby and Delafond, 
These gentlemen have communicated to the Academy of Sci- 
ences the discovery of entozoa circulating in the blood of a strong 
and healthy dog. Physiologists have for a long time been aware of 
the presence of certain entozoa in the blood of reptiles and fishes ; 
but this is the first instance in which they have been detected in 
the blood of a living mamma. It is of high importance to phy- - 
siology, pathology, and natural history, to shew, not only the 
existence of worms in the blood, but also their circulation in this 
fluid in the animals that come near to man in the scale of organ- 
ization. 
These entozoa have a diameter of 0.003 millimetre, and a length 
of 0.25 millimetre. They are transparent and colourless. The 
anterior extremity is obtuse. The posterior or caudal extremity is 
terminated by a very slender filament. At the superior part may 
be observed a small round depression, 0.005 millimetre long, which 
may be considered as the buccal fissure. Their motions are very 
active. Their life has been prolonged ten days after the blood 
has been taken from the vessels and exposed to a temperature of 
15° centigrade, or 59° Fahrenheit. They swim among the glo- 
bules of the blood with great vivacity, exercising an undulating 
movement. 
MM. Griiby and Delafond found them in the blood taken 
from the coccygeal arteries, external jugular veins, capillaries of 
the conjunctiva, mucous membranes, skin, muscles : in fact, every- 
where this liquid was found to contain them. The urine and 
other excrementitial matters did not contain them. The diame- 
ter of these entozoa, being less than that of the blood corpuscles, 
enabled them to circulate through the capillary vessels. 
Comptes Rendus and Physiological Journal. 
