Apple on Tuesday updated its list of Apple Pay participating card issuers to a total of 503 with the addition of 46 new US banks, credit unions, and other financial institutions. The total does not include banks outside the US, such as those in the UK. Among the more prominent names in the latest list are Citizens Bank, E-Trade Bank, John Hopkins Federal Credit Union, Merchants Bank, and the amusingly-named Cape Cod Five Cent Saving Bank.