From an (incredibly) brief skim of http://www.sony.co.uk/product/rec-memory-stick http://www.sony.co.uk/product/rec-memory-stick, it looks like they have a mark

From an (incredibly) brief skim of http://www.sony.co.uk/product/rec-memory-stick http://www.sony.co.uk/product/rec-memory-stick, it looks like they have a mark on "Memory Stick", but not necessarily "Memory Card".