384 VENOMS 



Hsemorrhagin, present in some species of Viperidce, 249. 



,, sensitive to heat, 249. 



Hamadryas elaps, 37. See also Naja hungarus. 

 Harlequin or coral snake, 106. See also Elaps fulvius. 

 Heart, action of venom on, 184. 



Heat, comparative effect on venoms of Colubridce, Hydrophiidce and Viperidce, 161. 

 ,, hsemorrhagin sensitive to, 249. 

 ,, resistance of hasmolysins of venoms to, 202. 



,, sole agent in attenuating venom submitted to alternating high frequency currents, 

 165. 

 Heating destroys toxicity of blood of reptiles, 218. 

 Hedgehog, immunity of, to venom of Vipera hems, 226. 



,, ,, ,, ,, proved experimentally, 226. 



,, blood of, toxic before heating, antitoxic afterwards, 226. 



Heloderma horridum, 321. 



,, ,, saliva sometimes toxic, sometimes harmless, 823. 



venom of, 321, 322. 

 Heniibungarus, 39. 



,, calligaster, 40. 



,, collaris, 40. 



,, japonicus, 40. 



,, nigrescens, 40. 



Henri, V., poison from pedicellarise prepared by, 273. 

 Herons of Colombia hunt young snakes for food, 227. 



J, ,, probable immunity to snake-venom, 226, 227. 



Hetero-albumoses, active principle of snake-venom, 164. 



,, separation from snake- venom, 162, 163. 



Heterometrus inaurus, venom of, 279. 



,, ,, ,, effect upon sparrovys, 279. 



High frequency currents, alternating, attenuate venom only by thermic action, 165. 

 Hill, Patrick, on duck-billed platypus, 324. 

 Hindus, worship bestowed on Naja by, 38. 

 Holbrook on Crotalus confliientus, 125. 

 Holocanthus, 305. 



,, imperator, 305. 



HomalopsincB, sub-family of Opisthoglypha, 3. 

 „ geographical distribution, 4. 



,, aquatic, 4. 



Eomorelaps, 57. 

 Hoplocephabis, 93. 



,, hitorguatus, 94. 



,, hungaroides (syn. H. variegatus, broad-headed snake), 94. 



,, curtus (Notcchis scutatus, tiger-snake), 95. 



,, ,, ,, ,, ,, bite dangerous, 100. 



secretion of, 149. 

 ,, stepliensii, 94. 



Horned rattle-snake, 129. See also Crotalus cerastes. 



Horse, bleeding, aseptically, after vaccination to obtain antivenomous serum, 245, 246. 

 ,, immunisation to venom, difficulties attending, 244, 245. 



