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Anatomy of the jaws of the cobra. 

 Fig. 1. Gape of the jaws. 

 Fig. 2. Superficial muscles and poison gland. 

 Fig. 3. Deep muscles, the glands removed. 

 i^ig. 4. Palate and pterygoid muscles. 

 Fig. 0. Base of the skull. 



Fio- 



6. Poison fang of the cobra. 

 a. Back view. 



a. „ part of the outer 



layer removed. 

 h. Front view. 

 c. Section, enlarged. 



7. Poison fang of the Dahoia 



viper. 



