Lizard

Golden Age Origin
The Lizard was a monstrous murderer who could scale walls. He carried a trained gila monster, "most deadly of all reptiles," with which he assassinated his victims. He sent his gila monster to bite Mrs. Van Vernon and took her money. The Raven pursued the LIzard, who kidnapped Lola. But while trying to evade the Raven in midair he forgot to "securely fasten his pet's pouch" and was poisoned by his own gila monster. It was not revealed whether the Lizard was wearing a costume or whether this was his natural appearance.

Golden Age Appearances
Lightning Comics v3 #1