104 
Tick Pcurdi/sis 
appear capable of inducing the same affection. It is clear that further 
investigation is required to elucidate the nature of the disease and to 
determine what species of ticks are capable of producing it. For 
the present we only possess clear experimental evidence implicating 
Derinacentor venustus. 
REFERENCES. 
Borthwick (vii. 190.5). Tick paralysis affecting sheep and lambs. Veterinary 
Jo\irn. London, n.s. xii, 33-34. (Abstract of Report to Chief Veterinary 
Surgeon, Cape Government.) 
Temple, I. U. (ix. 1912). Acute ascending paralysis, or Tick paralysis. Medical 
Sentinel, Portland, Oregon, xx, 507-514. (Paper read on 24. vi. 1912 before* 
the Eastern Oregon District Medical Society at Ontario, Oregon.) 
