DIGESTIVE APPARATUS. 



167 



tinal diseases attended with extensive exudation from the 

 mucous membrane the feces are not only coated with mucus 

 but are mixed with it. This mucus may be glossy, colorless, 

 yellowish (bile) or gray (epithelial cells and white blood 

 corpuscles). Flaky or fenestrated coagulations on the surface 

 of feces have their origin in the rectal mucous membrane 

 (proctitis). 



g. Odor of the feces. This varies with every species 

 according to the food. Horse dung can hardly be said to 



lift - \S)4 r -\\ 



■■&■ fm, *■? me i \ //3* - \ t 



mM 





4 dr-m'i-Z 



f w* 



Fig. 38 

 Eggs of Ascaris megalocephala in dung of horse. Globular in form, diameter 0.1 mm, 



double contour. 



have an offensive or repulsive odor, the dung of the ox has 

 an odor peculiar to itself, and the feces of carnivora stink. 

 Horse dung has a sour odor in digestive disorders when con- 

 centrated food was given in abundance. The feces of her- 

 bivora stink or have a foul odor when putrefactive processes 

 go on in the diseased digestive tract. If albuminous exudates 

 (blood) are present under these conditions the odor is car- 

 rion-like (hemorrhagic enteritis, distemper of dogs). 



