1. Length from end of snout to vent (in millimetres). 2. Number of scales 

 across middle of body. 3. Longitudinal series of ventral plates. 4. Transverse 

 series of ventral plates. 5. Plates in collar. 6. Gular scales in a line between 

 symphysis of chin-shields and median collar-plate. 7. Femoral pores (right 

 and left). 8. Lamellar scales under fourth toe. 



The three forms may be diagnosed as follows : 



Forma typica. — Head about If to 1^ times as long as broad ; 

 ventrals in 6 or 8 longitudinal rows ; anal moderate or rather small, 

 usually undivided; upper caudal scales oblique; femoral pores 16 

 to 25. 



Var. anatoUca, Werner. — Head about 1} to 1| times as long as 

 broad ; ventrals in 8 (rarely 6) longitudinal rows ; anal usually 

 divided; upper caudal scales oblique; femoral pores 15 to 21. 



Var. gneca, Bedr. — Head about H to If times as long as broad ; 

 ventrals in 6 longitudinal series ; anal rather large, undivided ; upper 

 caudal scales straight or slightly oblique ; femoral pores 20 to 28 ; 

 frontal often in contact with first supraocular. 



To allow these three forms the rank of species would be to impair 

 the sense of proportion in comparison to other species, taken even in 



