Venoms; venomous animals and antivenomous serum-therapeutics . A (d) Crotalus (Battle-Snakes). These snakes differ from all others in that the end of the tailbears a series of large conical scales, forming rattles, each fittinginto the next and movable in such a manner that when the reptilecauses them to move they produce a strident sound (fig. 72). The length ofthese animals oftenexceeds 2,000 mil-limetres. The headis fiat, very largeand expanded pos-teriorly, and ter-minated in front bya short, truncatesnout; it is coveredabove with scales orsmall shields. Kattle - Snakesare armed with enor-
Venoms; venomous animals and antivenomous serum-therapeutics . A (d) Crotalus (Battle-Snakes). These snakes differ from all others in that the end of the tailbears a series of large conical scales, forming rattles, each fittinginto the next and movable in such a manner that when the reptilecauses them to move they produce a strident sound (fig. 72). The length ofthese animals oftenexceeds 2,000 mil-limetres. The headis fiat, very largeand expanded pos-teriorly, and ter-minated in front bya short, truncatesnout; it is coveredabove with scales orsmall shields. Kattle - Snakesare armed with enor-mous fangs enclos-ing a complete canal,which extendsthroughout almosttheir entire poison - glandsare of the size of a large almond. The number of segments in the rattle is variable, but rarelyAt the time of the shedding of the skin these. B <S<i
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