A little late this year, but better late than never...
First off, Mammillaria lasiacantha ssp. lasiacantha
Then, Mammillaria lasiacantha SB500
And Mammillaria lasiacantha ssp. hyalina, or Mammillaria wohlschlageri if you prefer
And finally, Mammillaria lasiacantha 'denudata'
At least that's what the labels say!! I do know the SB500 is right, as I grew this from seed myself. The wohschlageri is from Uhlig, the SB414 from Bob Clayton, and the denudata is 20 years long in my collection, blooming every year, but not getting any bigger - all are in 7 cm pots.