A mason has been arrested for allegedly possessing counterfeit notes with a face value of over Rs 2.31 lakh, police said today. The mason, Prakash Prasa Mahato (42), was arrested by a team of Crime Branch sleuths from near a college here last evening, Inspector R V Kothmire said. Fake notes with a face value of Rs 2,31,200 were seized from him, he said.