The excretory organ is the proboscis gland. Excretion is the process of removal of nitrogenous waste from the body with the help of specialized organs referred to as excretory organs.
The proboscis gland lies in front of the central sinus projecting into the probosci's coelom and excretes yellow or brown granules.
Their body is divided into an anterior proboscis, a short collar and a long trunk.
Example: Balanoglossus (tongue worm) and cephalodiscus.