DEATH CAAIAS SPEC'IES. ZYGADEXUS ELEGAXS. 



21 



Weakness. Pronounced weakness was noted in 14 of the animals. 



Temperature. There was no evidence of any effect oij temperature. 

 In this connection perhaps it should be noted that none of the animals, 

 with the exception of Sheep 599, were very sick, and few temperature 

 observations were made on this animal. 



Pulse. No effect on the pulse was noted. 



Respiration. Sheep 599, which was very sick and died, had an 

 irregular respiration that at times was labored. Irregular respiration 

 was noted in Sheep 625. In other cases labored respiration was 

 noted. 



Trembling and heightened reflexes. It is interesting to note that 2 

 animals, Sheep 588 and 599, exhibited hyperesthesia, and one, Sheep 

 599, showed muscular trembling. These symptoms were noted 

 quite generally in the Z. gramineus cases seen in Montana, but were 

 not seen in the Z. paniculatus animals. 



In general, the symptoms closely resembled those seen in the 

 effects of the other species of Zygadenus, differing only in degree. 



DURATION OF SYMPTOMS. 



Table 7 shows the time during which the symptoms continued. 

 As in the similar table for Z. paniculatus, the time was computed 

 from the first noted symptom to the last observation. 



TABLE 7. Duration of symptoms. 



The average time of all the cases was 5 hours and 17 minutes. 

 Sheep 599, which died, was sick 6J hours. The shortest periods of 

 illness were those in which a single observation was made; the longest 

 was 20 hours and 6 minutes. 



As compared with Z. panic-Hiatus the sickness was of shorter 

 duration. 



TIME REQUIRED TO PRODUCE SYMPTOMS. 



Table 8 states the time elapsing between the feeding of the plant 

 and the development of symptoms. In some of these cases repeated 

 feedings were made, so that the administration of the plant extended 

 over a considerable period of time. In Sheep 588, for example, the 

 plant was given in 9 feedings involving a period of 3 hours. The 



