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@Howard
Standard cartridge bearings. You can push the black dust cap off to get access to the bearing. You can then raise the seal on the bearing with a scalpel and re-grease it if you need to. Or you can pop the bearing out and replace, but to do it properly you'd need some kind of bearing press - I think a headset press will do.
Oh, and that pic is a GXP BB which - as I understand it - isn't compatible with hollotech ii. Just in case you have a truvative or SRAM crankset and were thinking of replacing the BB with Shimano / Chris King / Mega Exo etc.