VOL. XXII.T PHILOSOPHICAL TRANSACTIONS. 409 



The author proposes it as a question, whether these eggs had been laid or 

 deposited in the ulcer after the hurt, or brought thither by the mass of 

 blood. 



Godefredi Bidloo Ohservatio de jinimalculis in Ovino aliorumque Animanliiim He- 

 pate delectis, adVirum Celebrem Antonium Leuwenhoeck. Lugd. Bat. 1698. 

 4to. N° 263, p. 571. 



After a short account of what has been said of the worms in the gall bladder 

 of a sheep,* he proposes to treat of 4 particulars. ]. Concerning the body and 

 disposition of these worms. 2. Concerning their place. 3. Their numbers, 

 propagation, &c. 4. Their being the cause of many diseases. He compares 

 their figure and motion to those of a sole or plaice, and exhibits them in a 

 copper plate in several positions, both of their natural size, and magnified. 

 The sheep are fat, and show no outward sign of having them. If the worms 

 lose their motion, they recover some of it when heated with a warm hand, or 

 put into a warm liver. They are pellucid, and their viscera are visible, they 

 have eyes, a heart, near it the guts close together, and 2 distinct liquors 

 moving in its vessels. He observed in them many egg-like bodies, whereof 

 100 would not be larger than a grain of sand. He always found these worms 

 in the gall-vessels, which they dilate to a considerable magnitude in some places, 

 and when they lie in the smaller vessels they accommodate their figure to their 

 place. He has taken 870 out of one animal, and 1000 out of another. They 

 are found in staes, calves, &c. He thinks he has likewise remembered to have 

 seen them in men's livers. He is of opinion they come not from putrid 

 matter, but as all other living creatures, from eggs. He believes their eggs 

 are eaten by the cattle, together with the liquor in which they live. He could 

 not any way by experiment find the stomach or intestines of animals troubled 

 with this disease perforated. He believes they cannot get from th^ duodenum 

 into the gall bladder, but supposes them to pass by the chyle into the blood, 

 and with the blood to the liver, where they stay in the gall-vessels. This he 

 endeavours to make probable. He gives a long catalogue of worms observed 

 in several parts of the body, and thinks he has seen or read of them in all 

 parts of the same, except the spleen. He thinks these worms may in several 

 places be the cause of several diseases, by occasioning swelling of the parts, 

 corroding and gnawing them, creeping into strait places, or exciting a 

 motion in the juices of the body, appropriating them to their own use, and 

 fouling them with their excrements and ofF-spring. 



* The Fasciola Hepatica. Linn. 

 3 S2 



