Genera: Crotalus, Boa, Coluber, Anguis, Amphisbaena, Caecilia.
Coluber in Europe, Asia and North America.
pestifero vomuit coluber sermone Britannus, is relieved by a treatment not lacking in liveliness and in classical measures.
The odour alone of guaco has been said to cause in snakes a state of stupor and torpidity; and Humboldt, who observed that the near approach of a rod steeped in guaco-juice was obnoxious to the venomous Coluber corallinus, was of opinion that inoculation with it imparts to the perspiration an odour which makes reptiles unwilling to bite.
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