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Fig. 5. Ventral view of the palate of an Indochinese spitting cobra Naja
siamensis before (A) and after (B) stimulation of the M. protractor
pterygoideus. Both A and B are photos of the same side of the same animal; B
was transposed to enhance comparison. Note the protraction and rotations of
the palato-maxillary arch. f, fang; pa, palatine; pt, pterygoid.