8 THE DISEASES OF DOMESTIC ANIMALS. 



than those of the extremities. Very few have been discovered in 

 the tail of any animal. In the extremities, the parasites are found 

 to be more abundant where the muscle-fibers begin to lose them- 

 selves in their tendinous extension than in the body of the muscle. 

 Numerous estimates have been published by different observers 

 as to the percental invasion of the different muscle-groups, several 

 of which may be given here. 



Microscopic specimens,* of an average length of two centimetres 

 and a width of one centimetre, were taken from the flesh of several 

 hogs which had been found trichinous. 



Eighty specimens taken from hog No. 1 gave the following : 



a. Pillars of diaphragm 12 trichinae. 



b. Muscles " 4 " 



c. " larynx 1 " 



d. " ribs None. 



e. " tongue " 



/. " neck 



g. " eye and overarm 



Sixty specimens from hog No. 2 : 



a. Pillars of diaphragm 10 trichina. 



b. Muscles " 6 



c. " larynx 2 " 



d. " ribs None. 



e. " tongue 



/. " eye 



g. " overarm and neck 



i. 



u 



Forty from hog No. 3 : 



a. Pillars of diaphragm 40 trichina. 



b. Muscles " 25 " 



c. " larynx 4 " 



d. " ribs 6 " 



u 



e. " tongue 8 



/. " neck, eye, and overarm 2 



Forty from hog No. 4 : 



a. Pillars of diaphragm 40 trichina. 



1. Muscles " 30 



e. " larynx 10 " 



d. " ribs 10 



e. " tongue 6 



f. " overarm 2 



* " Mittheilungen aus. d. thierarzlichen Praxis im Preussischen Staate," 1811-78, 

 p. 99. 



