We’ve just been informed (thanks, Chris) that there are a couple of classes missing from our database.  Specifically, the ones identified are BIOL 224, BIOL 331, BIOL 351, and BIOL 376, though there could be more missing.  We will be working on this ASAP to resolve the issue.  In the meantime, if you see any other classes missing from BUSIPlus, please let us know as soon as you can.  We will post an update when we fix the problem.  Sorry for any inconvenience in the meantime.