ClipArt ETC
"When the animal wishes to use these teeth, they issue from this fleshy sheath, somewhat in the same manner as the claws of a cat when about to be used as weapons of offense."

Fangs and Tongue of an Adder

"When the animal wishes to use these teeth, they issue from this fleshy sheath, somewhat in the same…

A cobra.

Cobra

A cobra.

"The Viperine Snakes have a long, perforated, erectile fang on the maxillary bone, which is extremely short and bears no teeth."

Fer-de-Lance

"The Viperine Snakes have a long, perforated, erectile fang on the maxillary bone, which is extremely…