476 



ATONIC DISEASES. 



puckered (the mouth), and the other pointed (the tail). Maw- 

 worms exist in great numbers in the dog, chiefly occupying the 

 large intestines, and have been usually considered not to injure the 



Fig. i. 



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

 but Dr. Cobbold is of opinion that they are merely sections of the 

 tape worm, and if so, the above opinion must be erroneous. The 

 subject is one which requires a special study, and I must there- 

 fore accept Dr. Cobbold's statement without dispute. 



The Round-iuorm (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 fig. 2), in which a shows the worm extended, 



Fig. 2. 



