34:6 THE DOG IN DISEASE. 



Practically we have to do with nematode, or round 

 worms, and cestode, or tape-worms. 



FlQ. 29. EUSTRONGYLUS GlGAS (COBBOLD). 



This parasite is occasionally found of great size in the dog, especially in the kidney. 



The principal round worm of the dog is Ascaris mar- 

 ginata, pale-red in color, round, tapering to each end, 

 firm to the feel, the sexes distinct, propagated by eggs 

 (ova) with great resisting power, and capable of maintain- 

 ing their vitality for months, from one to eight inches in 



FIG. 30. ASCARIDES (STONEHENGE). 



length, living in the small intestine, and moving about 

 freely i. e., not attached. Ascaris mystax also occurs. 



The thread-worm, or oxyuris, is very small, similar in 

 formation and mode of propagation to the preceding, lives 



