Renard’s Viper, [227]

renardi (Vipera), [227]

Replacement teeth, [55]

Reproduction, [82]

Reptation, [93]

Reptilia, [1]

Rhiptoglossa, [1]

riccioli (Coluber), [202]

Ring-Snake, [152]

romanus (Coluber longissimus, var.), [188]