There are several species of lizards that are venomous, but the number is relatively small compared to the total number of lizard species. Some of the well-known venomous lizards include:

1. Beaded Lizards (genus Heloderma): Apart from the Gila monster (Heloderma suspectum) and the Mexican beaded lizard (Heloderma horridum), there are two other recognized species in the Heloderma genus: the Guatemalan beaded lizard (Heloderma charlesbogerti) and the San Esteban Island beaded lizard (Heloderma exasperatum).

2. Komodo Dragon (Varanus komodoensis): Found on the Indonesian islands of Komodo, Rinca, Flores, Gili Motang, and Padar.

3. Lace Monitor (Varanus varius): A large lizard species found in Australia, known to possess venom-secreting glands.

4. Perentie (Varanus giganteus): Australia’s largest monitor lizard, and it has venom-secreting glands as well.

1. Bornean Earless Monitor (Lanthanotus borneensis): Found in Borneo, this small, secretive lizard is venomous.

2. Desert Monitor (Varanus griseus): A species of monitor lizard found in North Africa and the Middle East, which potentially has venom-secreting glands.

Please note that the list provided is not exhaustive, and there may be additional venomous lizard species that are lesser-known or have yet to be discovered.