Bui. 800, U. S. Dept. of Agriculture. 



PLATE VII. 



Fig. 1.— Sheep 478 at 11.57 a. m. 



Fig. 2.— Sheep 478 at 11.58 a. m. A character- 

 istic attitude when in a spasm. 



Fig. 3.— Sheep 478 at 12.24 p. m., when attempt- 

 ing to rise. 



Fig. 4.— Sheep 478 at 12.41 p. m., after falling 

 forward. 











Fig. 5.— Sheep 478 at 12.45 p. m., in one of the Fig. 6.— Sheep 478 at 1.05 p. m., when recover- 



intervals between spasms. ing. 



