(Serpentes: Colubridae) - compiled by Van Wallach
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Head drawings: genus
Hypsirhynchus(Serpentes: Colubridae) - compiled by Van Wallach
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 | Hypsirhynchus ferox (from Boulenger 1894) |
 | Hypsirhynchus ferox (from Boulenger 1894) |
 | Hypsirhynchus scalaris (from Cochran 1941) |