486 SNAKES OF CEYLON. 



(j) Toxins : Chemical formula C34 H^o ^02 (Faust) : — 



(1) Toxins operating on nerve cells — 



(a) A depressor that paralyses the respiratory centre 



(Brunton and Payrer). 

 (6) A depressor to the vasomotor centre (Lamb). 



(c) A depressor that paralyses centres in the bulb 



(A. J. Wall). 



(d) A depressor that paralyses the ends of nerves 



including the phrenic nerves (Brunton and 

 Fayrer). 



(e) A destructive agent to cells generally in the spine 



and cord (Lamb and Hunter). 



(2) A direct stimulant to cardiac muscle (Brunton and 



Fayrer, through EUiot) — 



(a) Action on muscle or nerve endings. 



(b) Vago-inhibitory apparatus. 



(c) Vaso constriction of arterioles. 



(3) A vaso constrictor (Brunton and Fayrer). 



(4) Tojdns affecting the constitution of the blood — 



(a) An antifibrin ferment that reduces clotting of blood 

 (Brunton and Fayrer). 



(6) " Haemolysin " destructive to red blood cells 

 (Hilson, Ragotzi). 



(c) " Leucolysin " destructive to white blood cells 



(Flexner and Noguchi). 



(d) An antibactericidal principle that destroys the 



normal activity that blood exhibits towards the 

 invasion of germs into the body (Flexner and 

 Noguchi). 



(5) Toxins destructive to other cell elements — 



(a) " Hsemorrhagin " destructive to the lining mem- 

 brane of arterioles (Flexner). 



(6) Agents destructive to cells at the seat of injury. 



