WORMS. 



431 



incli in length (Jig. 1), of a milky white colour, with one end cut 

 off obtusely and slightly puckered (the mouth), and the other 



i-iK-. 1. 



pointed (the tail). Maw- worms exist in great numbers in the dog, 

 chiefly occupying the large intestines, and not injuring the health 

 to any great degree, unless they exist in very large numbers. 

 They are male and female, and are propagated by ova. 



The Round-worm (Ascaris lumhricoides) is from four to seven 

 inches long, round, firm, and of a pale pink colour. The two ex- 

 tremities are exactly alike, and are slightly flattened in one direc- 

 tion at the point {see Jig. 2), in which a shows the worm extended. 



Fig. 2. 



