ABSTRACT Late-early Paleocene (Torrejonian) salamanders and lizards from the Gidley and Silberling quarries comprise a rather small but relatively diverse assemblage. Salamanders include the batrachosauroidids Opisthotriton kayi, O. gidleyi, sp. nov., the scapherpetontid Scapherpeton tectum, and the sirenid Habrosaurus dilatus. Lizards include the xantusiid Palaeoxantusia fera, the enigmatic anguids Machaerosaurus torrejonensis and Proxestops silberlingii, and an indeterminate varanid or necrosaurid. Machaerosaurus torrejonensis is better placed as Anguidae incertae sedis because it lacks any diagnostic (synapomorphic) characters that permit assignment to the “Anguinae.” Proxestops jepseni is a junior synonym of Proxestops silberlingii, comb. nov. This assemblage is similar to other Torrejonian assemblages of small amphibians and reptiles from the Western Interior of North America.