Fic. 94.—30A. Puff Adders (Bitis arietans) basking in sunupon the sand, Port Elizabeth. 30B. Puff 
Adder in act of swallowing arat. Another coiledupasleep. 30c. A Berg Adder (Bitis atropos). 30D. 
Night or Demon Adders (Causus rhombeatus) basking in sun upon the sand, Port Elizabeth—from life. 
