| 1. | The eyes are large and surrounded by 9 16 circumorbital scales.
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| 2. | The circumorbital ring consists of 16-25 scales.
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| 3. | The eye is surrounded by a circumorbital ring of 5-7 scales.
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| 4. | There are 10 12 ( rarely 8 18 ) small circumorbital scales below the supraocular.
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| 5. | The circumorbital ring includes 2 preoculars, 2 postoculars and 1-2 subocular scales.
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| 6. | There are 13-15 circumorbital scales with an incomplete outer ring of 13-17 scales.
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| 7. | There are 11-12 circumorbital scales, while two rows separate the eye from the supralabials.
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| 8. | The eyes are large and moveable, set well forward, and surrounded by 15 21 circumorbital scales.
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| 9. | The circumorbital ring consists of 2-3 preoculars, 1-2 postoculars and 1-2 suboculars.
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| 10. | Circumorbital scales towards the ventral or lower side, if any, are called "'subocular "'scales.
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