South-eastern Europe, Central and South Asia, Africa, Australia, 
Western North America, Central and South America, and West 
Indies, 
Skull of Python amethystinus. 
Synopsis of the Subfamilies and Genera. 
I. Supraorbital bone present ..... . PYTHONINA 
A. Premaxillary bone toothed ; subcaudals mostly in two rows. 
1. Tail not or but very slightly prehensile; rostral shield 
without or with shallow pits. 
No labial pits ; nostril lateral, in a single nasal ; no loreal. 
1. Loxocemus, p. 74. 
Lower labials with pits ; nostril lateral, between two nasals. 
2. Nardoa, p. 75. 
