The Divers Genitaliae of the Lizard-Folk

The Divers Genitaliae of the Lizard-Folk (full title, The Divers Genitaliae of the Lizard-Folk; all Provocative and Discursive Notes and Diagrammes Left Compleat and Unexpurgated, with Novel Engravings of a both Titillating and Educational Nature is a biological codex traditionally attributed to First Cosmopolitan Age scholar Reptilicus, although modern philologists generally believe that it was written by a distinct writer to whom they refer as "Pseudo-Reptilicus."

The codex was for many years treated as the authoritative source for mammalian humanoids on the Lizard People of the Hinter-fens. Although the document contains a great deal of useful and accurate medical and anthropological information about the Lizardfolk, its rather prurient editorial style and many depictions of the lizardkin mating process earned it a reputation as pornography among later, more conservative scholars. In magical and clerical libraries the book was typically relegated to a restricted section, granting it an almost mythical status as an erotic desideratum among young adepts and acolytes.