Coat of arms of the U.S. bishop Peter John Uglietto, Auxiliary Bishop of Boston. 
Blazon: Chevronny of five Argent and Or; upon a cross fleuretty Gules, an escutcheon Azure charged with a lion’s head, affronteé of the second.
Motto: “GUIDE OUR STEPS”.
Reference:

www.bostoncatholic.org. PDF
Own work
SajoR