TORSION OF THE DOUBLE COLON 



259 



that it is, with the animal on his back, on the top instead 

 of alongside the third, and that it is directed from left to 

 right across the abdomen. It will immediately be 

 noticed, too, in this case of incomplete twist, or twist of 



Fig. 24. — Diagram illustrating the position of the Four 

 Divisions of the Double Colon when Incomplete Twist 

 — THAT is, Twist of only half a turn — has occurred 

 FROM Right to Left. 



I, 2, 3, and 4, The first, second, third, and fourth portions, respec- 

 tively, of the bowel ; a, a and b, b, the vessels and glands ; R, 

 right side of abdomen ; L, left side of abdomen. The arrow in 

 the diagram indieates the direction of the twist. 



half a turn, that the vessels and glands are exposed 

 (see 8, 8, Fig. 25, and compare this with the bowel in its 

 normal position in Fig. 22). 



On the other hand, if the twist is from right to left 

 (see Fig. 26), then it will be noticed that the first third or 



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