Venoms; venomous animals and antivenomous serum-therapeutics . ^ are in 29—41 rows, andstrongly keeled ; ventrals 181—145 ; subcaudals 16—34. The body is thick, the head large and triangular, and the tailvery short. The colour is dirty yellow or orange, with large, 70 VENOMS transverse or oblique, chevron-shaped black bands; an obliqueblack band extends behind the eye. The belly is dirty yellow,uniform, or marked with small black spots. Total length, 1,350 milhmetres, sometimes more ; tail Fig. 36.—Skull of Bitis arietans (the Puff Adder).(After G. A. Boulenger, ojh cit.) Habitat: This s


Venoms; venomous animals and antivenomous serum-therapeutics . ^ are in 29—41 rows, andstrongly keeled ; ventrals 181—145 ; subcaudals 16—34. The body is thick, the head large and triangular, and the tailvery short. The colour is dirty yellow or orange, with large, 70 VENOMS transverse or oblique, chevron-shaped black bands; an obliqueblack band extends behind the eye. The belly is dirty yellow,uniform, or marked with small black spots. Total length, 1,350 milhmetres, sometimes more ; tail Fig. 36.—Skull of Bitis arietans (the Puff Adder).(After G. A. Boulenger, ojh cit.) Habitat: This snake is met with throughout Africa, fromSouthern Morocco, Kordofan, and Somaliland, to the Cape of GoodHope, and also in Southern Arabia. It is especially common nearthe Niger and on the Congo. When irritated, it puffs itself out to such an extent that its THE PBINCIPAL SPECIES OF POISONOUS SNAKES 71 body becomes twice the oudiuary size. It then doubles back itshead and neck in the shape of an S, and emits a loud andprolonged hiss. Before biting, it first strikes a blow with its head


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