374 THE ROT. 



Goese — is found in the biliary ducts of the sheep, the goat, the 

 deer, the ox, the horse, the ass, the hog, the dog, the rabbit, the 

 guinea-pig, and various other animals, and even in the human 

 being. It is from three-quarters of an inch to an inch and a 

 quarter in length, and from one-thii'd to half an inch in 

 greatest breadth. 



" Figs. 1 and 3 represent this parasite of its usual size and 

 appearance, and its resemblance to a minute sole, divested of 

 its fins, is very striking. The head is of a pointed form, round 

 above and flat beneath ; and the mouth opens laterally instead 



Fig. 1. Kg. 2. Fig. 3. 



of vertically. There are no barbs or tentaculse, as described 

 by some authors. The eyes are placed on the most prominent 

 part of the head, and are very singularly constructed (fig. 2). 

 They have the bony ring of the bird. * * * The anasta- 

 moses of the blood vessels which ramify over the head are 

 plainly seen through a tolerable microscope. The circulating 

 and digestive organs are also evident, and are seated almost 

 immediately below the head. The situation of the heart is 

 seen in fig. 1, and the two main vessels evidently springing 

 from it, and extending through almost the whole length of 

 the fluke. Smaller blood-vessels, if so they may be called, 

 ramify from them on either side. * * * 



" In the beUy, if so it may be called, are almost invariably 

 a very great number of oval particles, hundreds of which, 

 taken together, are not equal in bulk to a grain of sand. 

 They are of a pale red color, and are supposed to be the 

 spawn or eggs of the parasite. * * * 



"There can be no doubt that the eggs are frequently 

 received in the food. Having been discharged with the dung, 

 they rejnain on the grass or damp spot on which they may 

 fall, retaining their vital principle for an indefinite period of 

 time. * * * They find not always, or they find not at all, 

 a proper nidus in the places in which they are deposited ; but 

 taken up with the food, escaping the perils of rumination, and 

 threading every vessel and duct until they arrive at the biliary 

 canal, they burst from their shells, and grow, and probably 

 multiply. ***** 



"Leeuwenhoeck says that he has taken 870 flukes out of One 



