26o 



TROPICAL MEDICINE AND HYGIENE 



FIG. 105.*', Head of Lachesis, showing loreal pit (/. p.); k, head of Vipera 

 berus, showing shields and scales ; /, skull of Crotalus^ showing oblique 

 maxilla and long transpalatine ; ;, skull of Python, showing inter alia 

 absence of mandibular symphysis. 



