BIDDEFORD — Mariah Colby, daughter of Pam and Walter Colby of Oxford, has been named to the dean’s list for the 2010 fall semester at the University of New England. Dean’s list students have attained a grade point average of 3.30 or better out of a possible 4.0 at the end of the semester. A 2010 graduate of Oxford Hills Comprehensive High School, Colby is a major in pharmacy.